Initial commit

application/Espo/Classes/FieldValidators/ArrayIntType.php

@@ -0,0 +1,35 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+class ArrayIntType extends ArrayType
+{
+
+}

application/Espo/Classes/FieldValidators/ArrayType.php

@@ -0,0 +1,253 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Utils\Metadata;
+
+use Espo\ORM\Defs;
+use Espo\ORM\Entity;
+
+use stdClass;
+
+class ArrayType
+{
+    private const DEFAULT_MAX_ITEM_LENGTH = 100;
+
+    public function __construct(protected Metadata $metadata, private Defs $defs)
+    {}
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        return $this->isNotEmpty($entity, $field);
+    }
+
+    public function checkMaxCount(Entity $entity, string $field, int $validationValue): bool
+    {
+        if (!$this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        $list = $entity->get($field);
+
+        if (count($list) > $validationValue) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public function checkArrayOfString(Entity $entity, string $field): bool
+    {
+        /** @var ?mixed[] $list */
+        $list = $entity->get($field);
+
+        if ($list === null) {
+            return true;
+        }
+
+        foreach ($list as $item) {
+            if (!is_string($item)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        if (!$entity->has($field)) {
+            return true;
+        }
+
+        /** @var ?string[] $value */
+        $value = $entity->get($field);
+
+        if ($value === null || $value === []) {
+            return true;
+        }
+
+        $fieldDefs = $this->defs
+            ->getEntity($entity->getEntityType())
+            ->getField($field);
+
+        if ($fieldDefs->getParam('allowCustomOptions')) {
+            return true;
+        }
+
+        $optionList = $this->getOptionList($entity->getEntityType(), $field);
+
+        if ($optionList === null) {
+            return true;
+        }
+
+        foreach ($value as $item) {
+            if (!in_array($item, $optionList)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * @return ?string[]
+     */
+    private function getOptionList(string $entityType, string $field): ?array
+    {
+        $fieldDefs = $this->defs
+            ->getEntity($entityType)
+            ->getField($field);
+
+        /** @var ?string $path */
+        $path = $fieldDefs->getParam('optionsPath');
+        /** @var ?string $path */
+        $ref = $fieldDefs->getParam('optionsReference');
+
+        if (!$path && $ref && str_contains($ref, '.')) {
+            [$refEntityType, $refField] = explode('.', $ref);
+
+            $path = "entityDefs.{$refEntityType}.fields.{$refField}.options";
+        }
+
+        /** @var string[]|null|false $optionList */
+        $optionList = $path ?
+            $this->metadata->get($path) :
+            $fieldDefs->getParam('options');
+
+        if ($optionList === null) {
+            return null;
+        }
+
+        // For bc.
+        if ($optionList === false) {
+            return null;
+        }
+
+        return $optionList;
+    }
+
+    public function rawCheckArray(stdClass $data, string $field): bool
+    {
+        if (isset($data->$field) && !is_array($data->$field)) {
+            return false;
+        }
+
+        return true;
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        if (!$entity->has($field) || $entity->get($field) === null) {
+            return false;
+        }
+
+        $list = $entity->get($field);
+
+        if (!is_array($list)) {
+            return false;
+        }
+
+        if (count($list)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    public function checkMaxItemLength(Entity $entity, string $field, ?int $validationValue): bool
+    {
+        $maxLength = $validationValue ?? self::DEFAULT_MAX_ITEM_LENGTH;
+
+        /** @var mixed[] $value */
+        $value = $entity->get($field) ?? [];
+
+        foreach ($value as $item) {
+            if (is_string($item) && mb_strlen($item) > $maxLength) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function checkPattern(Entity $entity, string $field, ?string $validationValue): bool
+    {
+        if (!$validationValue) {
+            return true;
+        }
+
+        $pattern = $validationValue;
+
+        if ($validationValue[0] === '$') {
+            $patternName = substr($validationValue, 1);
+
+            $pattern = $this->metadata->get(['app', 'regExpPatterns', $patternName, 'pattern']) ??
+                $pattern;
+        }
+
+        $preparedPattern = '/^' . $pattern . '$/';
+
+        /** @var string[] $value */
+        $value = $entity->get($field) ?? [];
+
+        foreach ($value as $item) {
+            if ($item === '') {
+                continue;
+            }
+
+            if (!preg_match($preparedPattern, $item)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function checkNoEmptyString(Entity $entity, string $field, ?bool $validationValue): bool
+    {
+        if (!$validationValue) {
+            return true;
+        }
+
+        /** @var string[] $value */
+        $value = $entity->get($field) ?? [];
+
+        $optionList = $this->getOptionList($entity->getEntityType(), $field) ?? [];
+
+        foreach ($value as $item) {
+            if ($item === '' && !in_array($item, $optionList)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+}

application/Espo/Classes/FieldValidators/Attachment/Related.php

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+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Attachment;
+
+use Espo\Classes\FieldValidators\LinkParentType;
+use Espo\ORM\Entity;
+
+class Related extends LinkParentType
+{
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        $typeValue = $entity->get($field . 'Type');
+
+        if ($typeValue === 'TemplateManager') {
+            return true;
+        }
+
+        return parent::checkValid($entity, $field);
+    }
+}

application/Espo/Classes/FieldValidators/AuthenticationProvider/MethodValid.php

@@ -0,0 +1,62 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\AuthenticationProvider;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Core\Utils\Metadata;
+use Espo\Entities\AuthenticationProvider;
+use Espo\ORM\Entity;
+
+/**
+ * @implements Validator<AuthenticationProvider>
+ */
+class MethodValid implements Validator
+{
+    public function __construct(private Metadata $metadata) {}
+
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        $value = $entity->get($field);
+
+        if (!$value) {
+            return Failure::create();
+        }
+
+        $isAvailable = $this->metadata->get(['authenticationMethods', $value, 'provider', 'isAvailable']);
+
+        if (!$isAvailable) {
+            return Failure::create();
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/ChecklistType.php

@@ -0,0 +1,32 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+class ChecklistType extends ArrayType {}

application/Espo/Classes/FieldValidators/CurrencyType.php

@@ -0,0 +1,139 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Field\Currency;
+use Espo\Core\Utils\Config;
+use Espo\ORM\BaseEntity;
+use Espo\ORM\Defs\Params\AttributeParam;
+use Espo\ORM\Entity;
+
+class CurrencyType extends FloatType
+{
+    private const DEFAULT_PRECISION = 13;
+
+    public function __construct(private Config $config) {}
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        return
+            $entity->has($field) && $entity->get($field) !== null &&
+            $entity->has($field . 'Currency') && $entity->get($field . 'Currency') !== null &&
+            $entity->get($field . 'Currency') !== '';
+    }
+
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        if (!$this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        if ($entity->getAttributeType($field) !== Entity::VARCHAR) {
+            return true;
+        }
+
+        /** @var string $value */
+        $value = $entity->get($field);
+
+        if (preg_match('/^-?[0-9]+\.?[0-9]*$/', $value)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    public function checkInPermittedRange(Entity $entity, string $field): bool
+    {
+        if (!$this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        if ($entity->getAttributeType($field) !== Entity::VARCHAR) {
+            return true;
+        }
+
+        if (!$entity instanceof BaseEntity) {
+            return true;
+        }
+
+        /** @var int $precision */
+        $precision = $entity->getAttributeParam($field, AttributeParam::PRECISION) ?? self::DEFAULT_PRECISION;
+
+        $value = $entity->get($field);
+
+        $currency = Currency::create($value, 'USD');
+
+        if ($currency->isNegative()) {
+            $currency = $currency->multiply(-1);
+        }
+
+        $pad = str_pad('', $precision, '9');
+
+        assert(is_numeric($pad));
+
+        $limit = Currency::create($pad, 'USD');
+
+        if ($currency->compare($limit) === 1) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public function checkValidCurrency(Entity $entity, string $field): bool
+    {
+        $attribute = $field . 'Currency';
+
+        if (!$entity->has($attribute)) {
+            return true;
+        }
+
+        $currency = $entity->get($attribute);
+        $currencyList = $this->config->get('currencyList') ?? [$this->config->get('defaultCurrency')];
+
+        if (
+            $currency === null &&
+            !$entity->has($field) &&
+            $entity->isNew()
+        ) {
+            return true;
+        }
+
+        if (
+            $currency === null &&
+            $entity->has($field) &&
+            $entity->get($field) === null
+        ) {
+            return true;
+        }
+
+        return in_array($currency, $currencyList);
+    }
+}

application/Espo/Classes/FieldValidators/DateType.php

@@ -0,0 +1,66 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Field\Date;
+use Espo\ORM\Entity;
+
+use Exception;
+
+class DateType
+{
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        return $this->isNotEmpty($entity, $field);
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        return $entity->has($field) && $entity->get($field) !== null;
+    }
+
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        /** @var ?string $value */
+        $value = $entity->get($field);
+
+        if ($value === null) {
+            return true;
+        }
+
+        try {
+            Date::fromString($value);
+        } catch (Exception $e) {
+            return false;
+        }
+
+        return true;
+    }
+}

application/Espo/Classes/FieldValidators/DatetimeOptionalType.php

@@ -0,0 +1,83 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Field\DateTime;
+use Espo\Core\Field\Date;
+use Espo\ORM\Entity;
+use Exception;
+
+class DatetimeOptionalType extends DatetimeType
+{
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        return $this->isNotEmpty($entity, $field);
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        if ($entity->has($field) && $entity->get($field) !== null) {
+            return true;
+        }
+
+        if ($entity->has($field . 'Date') && $entity->get($field . 'Date') !== null) {
+            return true;
+        }
+
+        return false;
+    }
+
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        /** @var ?string $dateValue */
+        $dateValue = $entity->get($field  . 'Date');
+
+        if ($dateValue !== null) {
+            try {
+                Date::fromString($dateValue);
+            } catch (Exception $e) {
+                return false;
+            }
+        }
+
+        /** @var ?string $value */
+        $value = $entity->get($field);
+
+        if ($value !== null) {
+            try {
+                DateTime::fromString($value);
+            } catch (Exception $e) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+}

application/Espo/Classes/FieldValidators/DatetimeType.php

@@ -0,0 +1,56 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Field\DateTime;
+use Espo\ORM\Entity;
+
+use Exception;
+
+class DatetimeType extends DateType
+{
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        /** @var ?string $value */
+        $value = $entity->get($field);
+
+        if ($value === null) {
+            return true;
+        }
+
+        try {
+            DateTime::fromString($value);
+        } catch (Exception $e) {
+            return false;
+        }
+
+        return true;
+    }
+}

application/Espo/Classes/FieldValidators/Email/Addresses/MaxCount.php

@@ -0,0 +1,73 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Email\Addresses;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Core\Utils\Config;
+use Espo\Entities\Email;
+use Espo\ORM\Entity;
+
+use LogicException;
+
+/**
+ * @implements Validator<Email>
+ */
+class MaxCount implements Validator
+{
+    private const MAX_COUNT = 100;
+
+    public function __construct(private Config $config) {}
+
+    /**
+     * @param Email $entity
+     */
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        if ($field === 'to') {
+            $addresses = $entity->getToAddressList();
+        } else if ($field === 'cc') {
+            $addresses = $entity->getCcAddressList();
+        } else if ($field === 'bcc') {
+            $addresses = $entity->getBccAddressList();
+        } else {
+            throw new LogicException();
+        }
+
+        $maxCount = $this->config->get('emailRecipientAddressMaxCount') ?? self::MAX_COUNT;
+
+        if (count($addresses) > $maxCount) {
+            return Failure::create();
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/Email/Addresses/Valid.php

@@ -0,0 +1,68 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Email\Addresses;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\ORM\Entity;
+use Espo\Entities\Email;
+
+use LogicException;
+
+/**
+ * @implements Validator<Email>
+ */
+class Valid implements Validator
+{
+    /**
+     * @param Email $entity
+     */
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        if ($field === 'to') {
+            $addresses = $entity->getToAddressList();
+        } else if ($field === 'cc') {
+            $addresses = $entity->getCcAddressList();
+        } else if ($field === 'bcc') {
+            $addresses = $entity->getBccAddressList();
+        } else {
+            throw new LogicException();
+        }
+
+        foreach ($addresses as $address) {
+            if (!filter_var($address, FILTER_VALIDATE_EMAIL)) {
+                return Failure::create();
+            }
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/Email/EmailAddresses.php

@@ -0,0 +1,53 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Email;
+
+use Espo\Entities\Email;
+use Espo\ORM\Entity;
+
+class EmailAddresses
+{
+    /**
+     * @param Email $entity
+     */
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        if ($entity->getStatus() === Email::STATUS_DRAFT) {
+            return true;
+        }
+
+        return $this->isNotEmpty($entity, $field);
+    }
+
+    private function isNotEmpty(Entity $entity, string $field): bool
+    {
+        return $entity->has($field) && $entity->get($field) !== '' && $entity->get($field) !== null;
+    }
+}

application/Espo/Classes/FieldValidators/Email/SendAt/Future.php

@@ -0,0 +1,58 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Email\SendAt;
+
+use Espo\Core\Field\DateTime;
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Entities\Email;
+use Espo\ORM\Entity;
+
+/**
+ * @implements Validator<Email>
+ */
+class Future implements Validator
+{
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        $value = $entity->getSendAt();
+
+        if (!$value) {
+            return null;
+        }
+
+        if ($value->isLessThan(DateTime::createNow())) {
+            return Failure::create();
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/EmailType.php

@@ -0,0 +1,154 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Name\Field;
+use Espo\Core\Utils\Config;
+use Espo\Core\Utils\Metadata;
+use Espo\ORM\Defs\Params\FieldParam;
+use Espo\ORM\Entity;
+
+use stdClass;
+
+class EmailType
+{
+    private const DEFAULT_MAX_LENGTH = 255;
+    private const MAX_COUNT = 10;
+
+    public function __construct(
+        private Metadata $metadata,
+        private Config $config,
+    ) {}
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        if ($this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        $dataList = $entity->get($field . 'Data');
+
+        if (!is_array($dataList)) {
+            return false;
+        }
+
+        foreach ($dataList as $item) {
+            if (!empty($item->emailAddress)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function checkEmailAddress(Entity $entity, string $field): bool
+    {
+        if ($this->isNotEmpty($entity, $field)) {
+            $address = $entity->get($field);
+
+            if (!filter_var($address, FILTER_VALIDATE_EMAIL)) {
+                return false;
+            }
+        }
+
+        $dataList = $entity->get($field . 'Data');
+
+        if (!is_array($dataList)) {
+            return true;
+        }
+
+        foreach ($dataList as $item) {
+            if (!$item instanceof stdClass) {
+                return false;
+            }
+
+            if (empty($item->emailAddress)) {
+                continue;
+            }
+
+            $address = $item->emailAddress;
+
+            if (!filter_var($address, FILTER_VALIDATE_EMAIL)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function checkMaxLength(Entity $entity, string $field): bool
+    {
+        /** @var ?string $value */
+        $value = $entity->get($field);
+
+        /** @var int $maxLength */
+        $maxLength = $this->metadata
+                ->get(['entityDefs', 'EmailAddress', 'fields', Field::NAME, FieldParam::MAX_LENGTH]) ??
+            self::DEFAULT_MAX_LENGTH;
+
+        if ($value && mb_strlen($value) > $maxLength) {
+            return false;
+        }
+
+        $dataList = $entity->get($field . 'Data');
+
+        if (!is_array($dataList)) {
+            return true;
+        }
+
+        foreach ($dataList as $item) {
+            $value = $item->emailAddress;
+
+            if ($value && mb_strlen($value) > $maxLength) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function checkMaxCount(Entity $entity, string $field): bool
+    {
+        $maxCount = $this->config->get('emailAddressMaxCount') ?? self::MAX_COUNT;
+
+        $dataList = $entity->get($field . 'Data');
+
+        if (!is_array($dataList)) {
+            return true;
+        }
+
+        return count($dataList) <= $maxCount;
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        return $entity->has($field) && $entity->get($field) !== '' && $entity->get($field) !== null;
+    }
+}

application/Espo/Classes/FieldValidators/EnumType.php

@@ -0,0 +1,121 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Utils\Metadata;
+
+use Espo\ORM\Defs;
+use Espo\ORM\Entity;
+
+class EnumType
+{
+    private Metadata $metadata;
+    private Defs $defs;
+
+    private const DEFAULT_MAX_LENGTH = 255;
+
+    public function __construct(Metadata $metadata, Defs $defs)
+    {
+        $this->metadata = $metadata;
+        $this->defs = $defs;
+    }
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        return $this->isNotEmpty($entity, $field);
+    }
+
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        if (!$entity->has($field)) {
+            return true;
+        }
+
+        $fieldDefs = $this->defs
+            ->getEntity($entity->getEntityType())
+            ->getField($field);
+
+        /** @var ?string $path */
+        $path = $fieldDefs->getParam('optionsPath');
+        /** @var ?string $path */
+        $ref = $fieldDefs->getParam('optionsReference');
+
+        if (!$path && $ref && str_contains($ref, '.')) {
+            [$refEntityType, $refField] = explode('.', $ref);
+
+            $path = "entityDefs.{$refEntityType}.fields.{$refField}.options";
+        }
+
+        /** @var string[]|null|false $optionList */
+        $optionList = $path ?
+            $this->metadata->get($path) :
+            $fieldDefs->getParam('options');
+
+        if ($optionList === null) {
+            return true;
+        }
+
+        // For bc.
+        if ($optionList === false) {
+            return true;
+        }
+
+        $optionList = array_map(
+            fn ($item) => $item === '' ? null : $item,
+            $optionList
+        );
+
+        $value = $entity->get($field);
+
+        return in_array($value, $optionList);
+    }
+
+    public function checkMaxLength(Entity $entity, string $field, ?int $validationValue): bool
+    {
+        if (!$this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        $value = $entity->get($field);
+
+        $maxLength = $validationValue ?? self::DEFAULT_MAX_LENGTH;
+
+        if (mb_strlen($value) > $maxLength) {
+            return false;
+        }
+
+        return true;
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        return $entity->has($field) && $entity->get($field) !== null;
+    }
+}

application/Espo/Classes/FieldValidators/FileType.php

@@ -0,0 +1,34 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+class FileType extends LinkType
+{
+}

application/Espo/Classes/FieldValidators/FloatType.php

@@ -0,0 +1,34 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+class FloatType extends IntType
+{
+}

application/Espo/Classes/FieldValidators/ImageType.php

@@ -0,0 +1,34 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+class ImageType extends FileType
+{
+}

application/Espo/Classes/FieldValidators/InboundEmail/FetchSince/Required.php

@@ -0,0 +1,56 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\InboundEmail\FetchSince;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Entities\EmailAccount;
+use Espo\Entities\InboundEmail;
+use Espo\ORM\Entity;
+
+/**
+ * @implements Validator<InboundEmail|EmailAccount>
+ */
+class Required implements Validator
+{
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        if (!$entity->isAvailableForFetching()) {
+            return null;
+        }
+
+        if (!$entity->get('fetchSince')) {
+            return Failure::create();
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/IntType.php

@@ -0,0 +1,139 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Doctrine\DBAL\Types\Types;
+use Espo\ORM\Defs;
+use Espo\ORM\Defs\Params\AttributeParam;
+use Espo\ORM\Entity;
+use stdClass;
+
+class IntType
+{
+    public function __construct(
+        private Defs $defs,
+    ) {}
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        return $this->isNotEmpty($entity, $field);
+    }
+
+    /** @noinspection PhpUnused */
+    public function checkRangeInternal(Entity $entity, string $field): bool
+    {
+        $value = $entity->get($field);
+
+        if ($value === null) {
+            return true;
+        }
+
+        $dbType = $this->defs
+            ->getEntity($entity->getEntityType())
+            ->tryGetAttribute($field)
+            ?->getParam(AttributeParam::DB_TYPE) ?? Types::INTEGER;
+
+        $ranges = [
+            Types::INTEGER => [-2147483648, 2147483647],
+            Types::SMALLINT => [-32768, 32767],
+        ];
+
+        $range = $ranges[$dbType] ?? null;
+
+        if (!$range) {
+            return true;
+        }
+
+        if ($value < $range[0] || $value > $range[1]) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * @param mixed $validationValue
+     * @noinspection PhpUnused
+     */
+    public function checkMax(Entity $entity, string $field, $validationValue): bool
+    {
+        if (!$this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        if ($entity->get($field) > $validationValue) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * @param mixed $validationValue
+     * @noinspection PhpUnused
+     */
+    public function checkMin(Entity $entity, string $field, $validationValue): bool
+    {
+        if (!$this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        if ($entity->get($field) < $validationValue) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /** @noinspection PhpUnused */
+    public function rawCheckValid(stdClass $data, string $field): bool
+    {
+        if (!isset($data->$field)) {
+            return true;
+        }
+
+        $value = $data->$field;
+
+        if ($value === '') {
+            return true;
+        }
+
+        if (is_numeric($value)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        return $entity->has($field) && $entity->get($field) !== null;
+    }
+}

application/Espo/Classes/FieldValidators/JsonArrayType.php

@@ -0,0 +1,70 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\ORM\Entity;
+
+use stdClass;
+
+class JsonArrayType
+{
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        return $this->isNotEmpty($entity, $field);
+    }
+
+    public function rawCheckArray(stdClass $data, string $field): bool
+    {
+        if (isset($data->$field) && !is_array($data->$field)) {
+            return false;
+        }
+
+        return true;
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        if (!$entity->has($field) || $entity->get($field) === null) {
+            return false;
+        }
+
+        $list = $entity->get($field);
+
+        if (!is_array($list)) {
+            return false;
+        }
+
+        if (count($list)) {
+            return true;
+        }
+
+        return false;
+    }
+}

application/Espo/Classes/FieldValidators/LinkMultipleType.php

@@ -0,0 +1,282 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Utils\Metadata;
+use Espo\ORM\Defs;
+use Espo\ORM\Defs\Params\FieldParam;
+use Espo\ORM\Entity;
+use Espo\Core\ORM\Entity as CoreEntity;
+
+use stdClass;
+
+/**
+ * @noinspection PhpUnused
+ */
+class LinkMultipleType
+{
+    private const COLUMN_TYPE_ENUM = 'enum';
+    private const COLUMN_TYPE_VARCHAR = 'varchar';
+    private const COLUMN_TYPE_BOOL = 'bool';
+
+    public function __construct(private Metadata $metadata, private Defs $defs)
+    {}
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        if (!$entity instanceof CoreEntity) {
+            return false;
+        }
+
+        /** @var string[] $idList */
+        $idList = $entity->getLinkMultipleIdList($field);
+
+        return count($idList) > 0;
+    }
+
+    /** @noinspection PhpUnused */
+    public function checkPattern(Entity $entity, string $field): bool
+    {
+        /** @var ?mixed[] $idList */
+        $idList = $entity->get($field . 'Ids');
+
+        if ($idList === null || $idList === []) {
+            return true;
+        }
+
+        $pattern = $this->metadata->get(['app', 'regExpPatterns', 'id', 'pattern']);
+
+        if (!$pattern) {
+            return true;
+        }
+
+        $preparedPattern = '/^' . $pattern . '$/';
+
+        foreach ($idList as $id) {
+            if (!is_string($id)) {
+                return false;
+            }
+
+            if (!preg_match($preparedPattern, $id)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /** @noinspection PhpUnused */
+    public function checkMaxCount(Entity $entity, string $field, ?int $maxCount): bool
+    {
+        if ($maxCount === null) {
+            return true;
+        }
+
+        $list = $entity->get($field . 'Ids');
+
+        if (!is_array($list)) {
+            return true;
+        }
+
+        if (count($list) > $maxCount) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /** @noinspection PhpUnused */
+    public function checkColumnsValid(Entity $entity, string $field): bool
+    {
+        if (!$entity instanceof CoreEntity) {
+            return true;
+        }
+
+        if (!$entity->has($field . 'Columns')) {
+            return true;
+        }
+
+        /** @var ?stdClass $columnsData */
+        $columnsData = $entity->get($field . 'Columns');
+
+        if ($columnsData === null) {
+            return true;
+        }
+
+        $entityDefs = $this->defs->getEntity($entity->getEntityType());
+        $fieldDefs = $entityDefs->getField($field);
+
+        if ($fieldDefs->isNotStorable()) {
+            return true;
+        }
+
+        /** @var ?array<string, string> $columnsMap */
+        $columnsMap = $fieldDefs->getParam('columns');
+
+        if ($columnsMap === null || $columnsMap === []) {
+            return true;
+        }
+
+        if (!$entityDefs->hasRelation($field)) {
+            return true;
+        }
+
+        $relationDefs = $entityDefs->getRelation($field);
+
+        if (!$relationDefs->hasForeignEntityType()) {
+            return true;
+        }
+
+        $foreignEntityType = $relationDefs->getForeignEntityType();
+
+        foreach (array_keys(get_object_vars($columnsData)) as $id) {
+            $itemData = $columnsData->$id;
+
+            if (!$itemData instanceof stdClass) {
+                return false;
+            }
+
+            foreach ($columnsMap as $column => $foreignField) {
+                if (!property_exists($itemData, $column)) {
+                    continue;
+                }
+
+                $value = $itemData->$column;
+
+                $result = $this->checkColumnValue($foreignEntityType, $foreignField, $value);
+
+                if (!$result) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * @param mixed $value
+     */
+    private function checkColumnValue(string $entityType, string $field, $value): bool
+    {
+        $fieldDefs = $this->defs
+            ->getEntity($entityType)
+            ->getField($field);
+
+        $type = $fieldDefs->getType();
+
+        if ($type === self::COLUMN_TYPE_VARCHAR) {
+            return $this->checkColumnValueVarchar($fieldDefs, $value);
+        }
+
+        if ($type === self::COLUMN_TYPE_ENUM) {
+            return $this->checkColumnValueEnum($fieldDefs, $value);
+        }
+
+        if ($type === self::COLUMN_TYPE_BOOL) {
+            return is_bool($value);
+        }
+
+        return true;
+    }
+
+    /**
+     * @param mixed $value
+     */
+    private function checkColumnValueVarchar(Defs\FieldDefs $fieldDefs, $value): bool
+    {
+        if ($value === null) {
+            return true;
+        }
+
+        if (!is_string($value)) {
+            return false;
+        }
+
+        $maxLength = $fieldDefs->getParam(FieldParam::MAX_LENGTH);
+        $pattern = $fieldDefs->getParam('pattern');
+
+        if ($maxLength && mb_strlen($value) > $maxLength) {
+            return false;
+        }
+
+        if ($pattern) {
+            if ($pattern[0] === '$') {
+                $patternName = substr($pattern, 1);
+
+                $pattern = $this->metadata
+                    ->get(['app', 'regExpPatterns', $patternName, 'pattern']) ??
+                    $pattern;
+            }
+
+            $preparedPattern = '/^' . $pattern . '$/';
+
+            if (!preg_match($preparedPattern, $value)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * @param mixed $value
+     */
+    private function checkColumnValueEnum(Defs\FieldDefs $fieldDefs, $value): bool
+    {
+        if (!is_string($value) && $value !== null) {
+            return false;
+        }
+
+        /** @var ?string $path */
+        $path = $fieldDefs->getParam('optionsPath');
+
+        /** @var string[]|null|false $optionList */
+        $optionList = $path ?
+            $this->metadata->get($path) :
+            $fieldDefs->getParam('options');
+
+        if ($optionList === null) {
+            return true;
+        }
+
+        // For bc.
+        if ($optionList === false) {
+            return true;
+        }
+
+        $optionList = array_map(
+            fn ($item) => $item === '' ? null : $item,
+            $optionList
+        );
+
+        return in_array($value, $optionList);
+    }
+}

application/Espo/Classes/FieldValidators/LinkParentType.php

@@ -0,0 +1,108 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Utils\Metadata;
+use Espo\ORM\Defs;
+use Espo\ORM\Entity;
+
+class LinkParentType
+{
+    private Metadata $metadata;
+    private Defs $defs;
+
+    public function __construct(Metadata $metadata, Defs $defs)
+    {
+        $this->metadata = $metadata;
+        $this->defs = $defs;
+    }
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        $idAttribute = $field . 'Id';
+        $typeAttribute = $field . 'Type';
+
+        if (
+            !$entity->has($idAttribute) ||
+            $entity->get($idAttribute) === '' ||
+            $entity->get($idAttribute) === null
+        ) {
+            return false;
+        }
+
+        if (!$entity->get($typeAttribute)) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public function checkPattern(Entity $entity, string $field): bool
+    {
+        /** @var ?string $idValue */
+        $idValue = $entity->get($field . 'Id');
+
+        if ($idValue === null) {
+            return true;
+        }
+
+        $pattern = $this->metadata->get(['app', 'regExpPatterns', 'id', 'pattern']);
+
+        if (!$pattern) {
+            return true;
+        }
+
+        $preparedPattern = '/^' . $pattern . '$/';
+
+        return (bool) preg_match($preparedPattern, $idValue);
+    }
+
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        /** @var ?string $typeValue */
+        $typeValue = $entity->get($field . 'Type');
+
+        if ($typeValue === null) {
+            return true;
+        }
+
+        /** @var ?string[] $entityTypeList */
+        $entityTypeList = $this->defs
+            ->getEntity($entity->getEntityType())
+            ->getField($field)
+            ->getParam('entityList');
+
+        if ($entityTypeList !== null) {
+            return in_array($typeValue, $entityTypeList);
+        }
+
+        return (bool) $this->metadata->get(['entityDefs', $typeValue]);
+    }
+}

application/Espo/Classes/FieldValidators/LinkType.php

@@ -0,0 +1,73 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Utils\Metadata;
+use Espo\ORM\Entity;
+
+class LinkType
+{
+    private Metadata $metadata;
+
+    public function __construct(Metadata $metadata)
+    {
+        $this->metadata = $metadata;
+    }
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        $idAttribute = $field . 'Id';
+
+        if (!$entity->has($idAttribute)) {
+            return false;
+        }
+
+        return $entity->get($idAttribute) !== null && $entity->get($idAttribute) !== '';
+    }
+
+    public function checkPattern(Entity $entity, string $field): bool
+    {
+        $idValue = $entity->get($field . 'Id');
+
+        if ($idValue === null) {
+            return true;
+        }
+
+        $pattern = $this->metadata->get(['app', 'regExpPatterns', 'id', 'pattern']);
+
+        if (!$pattern) {
+            return true;
+        }
+
+        $preparedPattern = '/^' . $pattern . '$/';
+
+        return (bool) preg_match($preparedPattern, $idValue);
+    }
+}

application/Espo/Classes/FieldValidators/MultiEnumType.php

@@ -0,0 +1,40 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\ORM\Entity;
+
+class MultiEnumType extends ArrayType
+{
+    public function checkNoEmptyString(Entity $entity, string $field, ?bool $validationValue): bool
+    {
+        return parent::checkNoEmptyString($entity, $field, true);
+    }
+}

application/Espo/Classes/FieldValidators/PasswordType.php

@@ -0,0 +1,65 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use stdClass;
+
+class PasswordType
+{
+    private const DEFAULT_MAX_LENGTH = 255;
+
+    public function rawCheckValid(stdClass $data, string $field): bool
+    {
+        $value = $data->$field ?? null;
+
+        if ($value === null) {
+            return true;
+        }
+
+        return is_string($value);
+    }
+
+    public function rawCheckMaxLength(stdClass $data, string $field, ?int $validationValue): bool
+    {
+        $value = $data->$field ?? null;
+
+        if (!is_string($value)) {
+            return true;
+        }
+
+        $maxLength = $validationValue ?? self::DEFAULT_MAX_LENGTH;
+
+        if (mb_strlen($value) > $maxLength) {
+            return false;
+        }
+
+        return true;
+    }
+}

application/Espo/Classes/FieldValidators/PersonNameType.php

@@ -0,0 +1,64 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\ORM\Entity;
+use Espo\Core\Utils\FieldUtil;
+
+class PersonNameType
+{
+    public function __construct(private FieldUtil $fieldUtil)
+    {}
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        $isEmpty = true;
+
+        $attributeList = $this->fieldUtil->getActualAttributeList($entity->getEntityType(), $field);
+
+        foreach ($attributeList as $attribute) {
+            if ($attribute === 'salutation' . ucfirst($field)) {
+                continue;
+            }
+
+            if ($entity->has($attribute) && $entity->get($attribute) !== '') {
+                $isEmpty = false;
+
+                break;
+            }
+        }
+
+        if ($isEmpty) {
+            return false;
+        }
+
+        return true;
+    }
+}

application/Espo/Classes/FieldValidators/PhoneType.php

@@ -0,0 +1,255 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Brick\PhoneNumber\PhoneNumber;
+use Brick\PhoneNumber\PhoneNumberParseException;
+use Espo\Core\PhoneNumber\Util;
+use Espo\Core\Utils\Config;
+use Espo\Core\Utils\Metadata;
+use Espo\ORM\Defs;
+use Espo\ORM\Defs\Params\FieldParam;
+use Espo\ORM\Entity;
+
+use stdClass;
+
+/**
+ * @noinspection PhpUnused
+ */
+class PhoneType
+{
+    private const DEFAULT_MAX_LENGTH = 36;
+    private const MAX_COUNT = 10;
+
+    public function __construct(
+        private Metadata $metadata,
+        private Defs $defs,
+        private Config $config
+    ) {}
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        if ($this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        $dataList = $entity->get($field . 'Data');
+
+        if (!is_array($dataList)) {
+            return false;
+        }
+
+        foreach ($dataList as $item) {
+            if (!empty($item->phoneNumber)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        if ($this->isNotEmpty($entity, $field)) {
+            $number = $entity->get($field);
+
+            if (!$this->isValidNumber($number)) {
+                return false;
+            }
+        }
+
+        $dataList = $entity->get($field . 'Data');
+
+        if (!is_array($dataList)) {
+            return true;
+        }
+
+        foreach ($dataList as $item) {
+            if (!$item instanceof stdClass) {
+                return false;
+            }
+
+            $number = $item->phoneNumber ?? null;
+            $type = $item->type ?? null;
+
+            if (!$number) {
+                return false;
+            }
+
+            if (!$this->isValidNumber($number)) {
+                return false;
+            }
+
+            if (!$this->isValidType($entity->getEntityType(), $field, $type)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function checkMaxLength(Entity $entity, string $field): bool
+    {
+        /** @var ?string $value */
+        $value = $entity->get($field);
+
+        /** @var int $maxLength */
+        $maxLength = $this->metadata->get(['entityDefs', 'PhoneNumber', 'fields', 'name', FieldParam::MAX_LENGTH]) ??
+            self::DEFAULT_MAX_LENGTH;
+
+        if ($value && mb_strlen($value) > $maxLength) {
+            return false;
+        }
+
+        $dataList = $entity->get($field . 'Data');
+
+        if (!is_array($dataList)) {
+            return true;
+        }
+
+        foreach ($dataList as $item) {
+            $value = $item->phoneNumber;
+
+            if ($value && mb_strlen($value) > $maxLength) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * @param mixed $type
+     */
+    private function isValidType(string $entityType, string $field, $type): bool
+    {
+        if ($type === null) {
+            // Will be stored with a default type.
+            return true;
+        }
+
+        if (!is_string($type)) {
+            return false;
+        }
+
+        /** @var string[]|null|false $typeList */
+        $typeList = $this->defs
+            ->getEntity($entityType)
+            ->getField($field)
+            ->getParam('typeList');
+
+        if ($typeList === null) {
+            return true;
+        }
+
+        // For bc.
+        if ($typeList === false) {
+            return true;
+        }
+
+        return in_array($type, $typeList);
+    }
+
+    /**
+     * @param mixed $number
+     */
+    private function isValidNumber($number): bool
+    {
+        if (!is_string($number)) {
+            return false;
+        }
+
+        if ($number === '') {
+            return false;
+        }
+
+        $pattern = $this->metadata->get(['app', 'regExpPatterns', 'phoneNumberLoose', 'pattern']);
+
+        if (!$pattern) {
+            return true;
+        }
+
+        $preparedPattern = '/^' . $pattern . '$/';
+
+        if (!preg_match($preparedPattern, $number)) {
+            return false;
+        }
+
+        if (!$this->config->get('phoneNumberInternational')) {
+            return true;
+        }
+
+        $ext = null;
+
+        if ($this->config->get('phoneNumberExtensions')) {
+            [$number, $ext] = Util::splitExtension($number);
+        }
+
+        if ($ext) {
+            if (!preg_match('/[0-9]+/', $ext)) {
+                return false;
+            }
+
+            if (strlen($ext) > 6) {
+                return false;
+            }
+        }
+
+        try {
+            $numberObj = PhoneNumber::parse($number);
+        } catch (PhoneNumberParseException) {
+            return false;
+        }
+
+        if ((string) $numberObj !== $number) {
+            return false;
+        }
+
+        return $numberObj->isPossibleNumber();
+    }
+
+    public function checkMaxCount(Entity $entity, string $field): bool
+    {
+        $maxCount = $this->config->get('phoneNumberMaxCount') ?? self::MAX_COUNT;
+
+        $dataList = $entity->get($field . 'Data');
+
+        if (!is_array($dataList)) {
+            return true;
+        }
+
+        return count($dataList) <= $maxCount;
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        return $entity->has($field) && $entity->get($field) !== '' && $entity->get($field) !== null;
+    }
+}

application/Espo/Classes/FieldValidators/ScheduledJob/Scheduling/Valid.php

@@ -0,0 +1,61 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\ScheduledJob\Scheduling;
+
+use Cron\CronExpression;
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Entities\ScheduledJob;
+use Espo\ORM\Entity;
+use Exception;
+
+/**
+ * @implements Validator<ScheduledJob>
+ */
+class Valid implements Validator
+{
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        $scheduling = $entity->getScheduling();
+
+        if ($scheduling === null) {
+            return null;
+        }
+
+        try {
+            new CronExpression($scheduling);
+        } catch (Exception) {
+            return Failure::create();
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/Settings/AuthIpAddressWhitelist/Valid.php

@@ -0,0 +1,90 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Settings\AuthIpAddressWhitelist;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\ORM\Entity;
+
+/**
+ * @implements Validator<Entity>
+ */
+class Valid implements Validator
+{
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        $list = $entity->get($field);
+
+        if (!is_array($list)) {
+            return null;
+        }
+
+        foreach ($list as $item) {
+            if (!is_string($item)) {
+                continue;
+            }
+
+            if (!$this->isValid($item)) {
+                return Failure::create();
+            }
+        }
+
+        return null;
+    }
+
+    private function isValid(string $item): bool
+    {
+        $address = $item;
+
+        if (count(explode('/', $item)) > 1) {
+            [$address, $mask] = explode('/', $item, 2);
+
+            if (!is_numeric($mask)) {
+                return false;
+            }
+
+            $mask = (int) $mask;
+
+            if ($mask < 0 || $mask > 128) {
+                return false;
+            }
+        }
+
+        if (
+            filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false &&
+            filter_var($address, FILTER_VALIDATE_IP) === false
+        ) {
+            return false;
+        }
+
+        return true;
+    }
+}

application/Espo/Classes/FieldValidators/Settings/AvailableReactions/Valid.php

@@ -0,0 +1,66 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Settings\AvailableReactions;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Core\Utils\Metadata;
+use Espo\Entities\Settings;
+use Espo\ORM\Entity;
+
+/**
+ * @implements Validator<Settings>
+ */
+class Valid implements Validator
+{
+    public function __construct(private Metadata $metadata)
+    {}
+
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        $value = $entity->get($field);
+
+        if (!is_array($value)) {
+            return null;
+        }
+
+        /** @var string[] $allowedList */
+        $allowedList = array_map(fn ($it) => $it['type'], $this->metadata->get("app.reactions.list", []));
+
+        foreach ($value as $it) {
+            if (!in_array($it, $allowedList)) {
+                return Failure::create();
+            }
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/Settings/ThousandSeparator/Valid.php

@@ -0,0 +1,60 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\Settings\ThousandSeparator;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\ORM\Entity;
+
+/**
+ * @implements Validator<Entity>
+ */
+class Valid implements Validator
+{
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        $value = $entity->get($field);
+
+        if (!$value) {
+            return null;
+        }
+
+        if (!is_string($value)) {
+            return Failure::create();
+        }
+
+        if (preg_match('/^[0-9]$/', $value)) {
+            return Failure::create();
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/TextType.php

@@ -0,0 +1,63 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\ORM\Entity;
+
+class TextType
+{
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        return $this->isNotEmpty($entity, $field);
+    }
+
+    public function checkMaxLength(Entity $entity, string $field, int $validationValue): bool
+    {
+        if (!$this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        $value = $entity->get($field);
+
+        if (mb_strlen($value) > $validationValue) {
+            return false;
+        }
+
+        return true;
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        return
+            $entity->has($field) &&
+            $entity->get($field) !== '' &&
+            $entity->get($field) !== null;
+    }
+}

application/Espo/Classes/FieldValidators/UrlMultipleType.php

@@ -0,0 +1,55 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\ORM\Entity;
+
+class UrlMultipleType extends ArrayType
+{
+    private const MAX_ITEM_LENGTH = 255;
+
+    public function checkNoEmptyString(Entity $entity, string $field, ?bool $validationValue): bool
+    {
+        return parent::checkNoEmptyString($entity, $field, true);
+    }
+
+    public function checkMaxItemLength(Entity $entity, string $field, ?int $validationValue): bool
+    {
+        return parent::checkMaxItemLength($entity, $field, self::MAX_ITEM_LENGTH);
+    }
+
+    public function checkPattern(Entity $entity, string $field, ?string $validationValue): bool
+    {
+        /** @var string $pattern */
+        $pattern = $this->metadata->get(['app', 'regExpPatterns', 'uriOptionalProtocol', 'pattern']);
+
+        return parent::checkPattern($entity, $field, $pattern);
+    }
+}

application/Espo/Classes/FieldValidators/UrlType.php

@@ -0,0 +1,72 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Utils\Metadata;
+use Espo\ORM\Entity;
+
+class UrlType
+{
+    private Metadata $metadata;
+
+    private VarcharType $varcharType;
+
+    public function __construct(Metadata $metadata, VarcharType $varcharType)
+    {
+        $this->metadata = $metadata;
+        $this->varcharType = $varcharType;
+    }
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        return $this->varcharType->checkRequired($entity, $field);
+    }
+
+    public function checkMaxLength(Entity $entity, string $field, ?int $validationValue): bool
+    {
+        return $this->varcharType->checkMaxLength($entity, $field, $validationValue);
+    }
+
+    public function checkValid(Entity $entity, string $field): bool
+    {
+        $value = $entity->get($field);
+
+        if ($value === null) {
+            return true;
+        }
+
+        /** @var string $pattern */
+        $pattern = $this->metadata->get(['app', 'regExpPatterns', 'uriOptionalProtocol', 'pattern']);
+
+        $preparedPattern = '/^' . $pattern . '$/';
+
+        return (bool) preg_match($preparedPattern, $value);
+    }
+}

application/Espo/Classes/FieldValidators/User/DefaultTeam/IsUserTeam.php

@@ -0,0 +1,55 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\User\DefaultTeam;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Entities\User;
+use Espo\ORM\Entity;
+
+/**
+ * @implements Validator<User>
+ */
+class IsUserTeam implements Validator
+{
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        if (!$entity->getDefaultTeam()) {
+            return null;
+        }
+
+        if (in_array($entity->getDefaultTeam()->getId(), $entity->getTeamIdList())) {
+            return null;
+        }
+
+        return Failure::create();
+    }
+}

application/Espo/Classes/FieldValidators/User/UserName/Valid.php

@@ -0,0 +1,79 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators\User\UserName;
+
+use Espo\Core\FieldValidation\Validator;
+use Espo\Core\FieldValidation\Validator\Data;
+use Espo\Core\FieldValidation\Validator\Failure;
+use Espo\Core\Utils\Config;
+use Espo\Entities\User;
+use Espo\ORM\Entity;
+use RuntimeException;
+
+/**
+ * @implements Validator<User>
+ */
+class Valid implements Validator
+{
+    private Config $config;
+
+    public function __construct(Config $config) {
+        $this->config = $config;
+    }
+
+    /**
+     * @param User $entity
+     */
+    public function validate(Entity $entity, string $field, Data $data): ?Failure
+    {
+        $value = $entity->getUserName();
+
+        if ($value === null) {
+            return null;
+        }
+
+        /** @var ?string $regExp */
+        $regExp = $this->config->get('userNameRegularExpression');
+
+        if (!$regExp) {
+            throw new RuntimeException("No `userNameRegularExpression` in config.");
+        }
+
+        if (strpos($value, ' ') !== false) {
+            return Failure::create();
+        }
+
+        if (preg_replace("/{$regExp}/", '_', $value) !== $value) {
+            return Failure::create();
+        }
+
+        return null;
+    }
+}

application/Espo/Classes/FieldValidators/VarcharType.php

@@ -0,0 +1,107 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Classes\FieldValidators;
+
+use Espo\Core\Utils\Metadata;
+use Espo\ORM\Defs;
+use Espo\ORM\Entity;
+
+class VarcharType
+{
+    private Metadata $metadata;
+
+    private const DEFAULT_MAX_LENGTH = 255;
+    private Defs $defs;
+
+    public function __construct(Metadata $metadata, Defs $defs)
+    {
+        $this->metadata = $metadata;
+        $this->defs = $defs;
+    }
+
+    public function checkRequired(Entity $entity, string $field): bool
+    {
+        return $this->isNotEmpty($entity, $field);
+    }
+
+    public function checkMaxLength(Entity $entity, string $field, ?int $validationValue): bool
+    {
+        if (!$this->isNotEmpty($entity, $field)) {
+            return true;
+        }
+
+        $fieldDefs = $this->defs
+            ->getEntity($entity->getEntityType())
+            ->getField($field);
+
+        if ($fieldDefs->isNotStorable() && !$validationValue) {
+            return true;
+        }
+
+        $value = $entity->get($field);
+
+        $maxLength = $validationValue ?? self::DEFAULT_MAX_LENGTH;
+
+        if (mb_strlen($value) > $maxLength) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public function checkPattern(Entity $entity, string $field, ?string $validationValue): bool
+    {
+        if (!$this->isNotEmpty($entity, $field) || !$validationValue) {
+            return true;
+        }
+
+        $value = $entity->get($field);
+        $pattern = $validationValue;
+
+        if ($validationValue[0] === '$') {
+            $patternName = substr($validationValue, 1);
+
+            $pattern = $this->metadata->get(['app', 'regExpPatterns', $patternName, 'pattern']) ??
+                $pattern;
+        }
+
+        $preparedPattern = '/^' . $pattern . '$/';
+
+        return (bool) preg_match($preparedPattern, $value);
+    }
+
+    protected function isNotEmpty(Entity $entity, string $field): bool
+    {
+        return
+            $entity->has($field) &&
+            $entity->get($field) !== '' &&
+            $entity->get($field) !== null;
+    }
+}