Initial commit

application/Espo/Tools/LinkManager/Hook/CreateHook.php

@@ -0,0 +1,37 @@
+<?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\Tools\LinkManager\Hook;
+
+use Espo\Tools\LinkManager\Params;
+
+interface CreateHook
+{
+    public function process(Params $params): void;
+}

application/Espo/Tools/LinkManager/Hook/DeleteHook.php

@@ -0,0 +1,37 @@
+<?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\Tools\LinkManager\Hook;
+
+use Espo\Tools\LinkManager\Params;
+
+interface DeleteHook
+{
+    public function process(Params $params): void;
+}

application/Espo/Tools/LinkManager/Hook/HookProcessor.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\Tools\LinkManager\Hook;
+
+use Espo\Core\Utils\Metadata;
+use Espo\Core\InjectableFactory;
+use Espo\Tools\LinkManager\Params;
+
+class HookProcessor
+{
+    public function __construct(
+        private Metadata $metadata,
+        private InjectableFactory $injectableFactory
+    ) {}
+
+    public function processCreate(Params $params): void
+    {
+        foreach ($this->getCreateHookList() as $hook) {
+            $hook->process($params);
+        }
+    }
+
+    public function processDelete(Params $params): void
+    {
+        foreach ($this->getDeleteHookList() as $hook) {
+            $hook->process($params);
+        }
+    }
+
+    /**
+     * @return CreateHook[]
+     */
+    private function getCreateHookList(): array
+    {
+        /** @var class-string<CreateHook>[] $classNameList */
+        $classNameList = $this->metadata->get(['app', 'linkManager', 'createHookClassNameList']) ?? [];
+
+        $list = [];
+
+        foreach ($classNameList as $className) {
+            $list[] = $this->injectableFactory->create($className);
+        }
+
+        return $list;
+    }
+
+    /**
+     * @return DeleteHook[]
+     */
+    private function getDeleteHookList(): array
+    {
+        /** @var class-string<DeleteHook>[] $classNameList */
+        $classNameList = $this->metadata->get(['app', 'linkManager', 'deleteHookClassNameList']) ?? [];
+
+        $list = [];
+
+        foreach ($classNameList as $className) {
+            $list[] = $this->injectableFactory->create($className);
+        }
+
+        return $list;
+    }
+}

application/Espo/Tools/LinkManager/Hook/Hooks/ForeignFieldDelete.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\Tools\LinkManager\Hook\Hooks;
+
+use Espo\Core\ORM\Type\FieldType;
+use Espo\Tools\LinkManager\Hook\DeleteHook;
+use Espo\Tools\LinkManager\Params;
+use Espo\Core\Utils\Metadata;
+
+use Espo\ORM\Defs;
+
+class ForeignFieldDelete implements DeleteHook
+{
+    public function __construct(
+        private Metadata $metadata,
+        private Defs $defs
+    ) {}
+
+    public function process(Params $params): void
+    {
+        $this->processInternal($params->getEntityType(), $params->getLink());
+
+        if ($params->getForeignEntityType()) {
+            $this->processInternal($params->getForeignEntityType(), $params->getForeignLink());
+        }
+    }
+
+    private function processInternal(string $entityType, string $link): void
+    {
+        if (!$this->defs->hasEntity($entityType)) {
+            return;
+        }
+
+        foreach ($this->defs->getEntity($entityType)->getFieldList() as $fieldDefs) {
+            if ($fieldDefs->getType() !== FieldType::FOREIGN) {
+                continue;
+            }
+
+            if ($fieldDefs->getParam('link') === $link) {
+                $this->deleteForeignField($entityType, $fieldDefs->getName());
+            }
+        }
+    }
+
+    private function deleteForeignField(string $entityType, string $field): void
+    {
+        $this->metadata->delete('entityDefs', $entityType, ['fields.' . $field]);
+
+        $this->metadata->save();
+    }
+}

application/Espo/Tools/LinkManager/Hook/Hooks/TargetListCreate.php

@@ -0,0 +1,169 @@
+<?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\Tools\LinkManager\Hook\Hooks;
+
+use Espo\Core\ORM\Type\FieldType;
+use Espo\Core\Templates\Entities\Company;
+use Espo\Core\Templates\Entities\Person;
+use Espo\ORM\Defs\Params\FieldParam;
+use Espo\ORM\Defs\Params\RelationParam;
+use Espo\ORM\Type\AttributeType;
+use Espo\Tools\LinkManager\Hook\CreateHook;
+use Espo\Tools\LinkManager\Params;
+use Espo\Tools\LinkManager\Type;
+use Espo\Modules\Crm\Entities\TargetList;
+use Espo\Core\Utils\Metadata;
+
+class TargetListCreate implements CreateHook
+{
+    public function __construct(private Metadata $metadata)
+    {}
+
+    public function process(Params $params): void
+    {
+        $toProcess =
+            (
+                $params->getEntityType() === TargetList::ENTITY_TYPE ||
+                $params->getForeignEntityType() === TargetList::ENTITY_TYPE
+            ) &&
+            $params->getType() === Type::MANY_TO_MANY;
+
+        if (!$toProcess) {
+            return;
+        }
+
+        [$entityType, $link, $foreignLink] = $params->getEntityType() === TargetList::ENTITY_TYPE ?
+            [
+                $params->getForeignEntityType(),
+                $params->getForeignLink(),
+                $params->getLink(),
+            ] :
+            [
+                $params->getEntityType(),
+                $params->getLink(),
+                $params->getForeignLink(),
+            ];
+
+        if (!$entityType) {
+            return;
+        }
+
+        $type = $this->metadata->get(['scopes', $entityType, 'type']);
+
+        if (!in_array($type, [Person::TEMPLATE_TYPE, Company::TEMPLATE_TYPE])) {
+            return;
+        }
+
+        if ($link !== 'targetLists') {
+            return;
+        }
+
+        $this->processInternal($entityType, $link, $foreignLink);
+    }
+
+    private function processInternal(string $entityType, string $link, string $foreignLink): void
+    {
+        $this->metadata->set('entityDefs', TargetList::ENTITY_TYPE, [
+            'links' => [
+                $foreignLink => [
+                    RelationParam::ADDITIONAL_COLUMNS => [
+                        'optedOut' => [
+                            'type' => AttributeType::BOOL,
+                        ]
+                    ],
+                    'columnAttributeMap' => [
+                        'optedOut' => 'isOptedOut',
+                    ],
+                ],
+            ],
+        ]);
+
+        $this->metadata->set('entityDefs', $entityType, [
+            'links' => [
+                $link => [
+                    'columnAttributeMap' => [
+                        'optedOut' => 'targetListIsOptedOut',
+                    ],
+                ],
+            ],
+            'fields' => [
+                'targetListIsOptedOut' => [
+                    'type' => FieldType::BOOL,
+                    FieldParam::NOT_STORABLE => true,
+                    'readOnly' => true,
+                    'disabled' => true,
+                ],
+            ]
+        ]);
+
+        $this->metadata->set('clientDefs', TargetList::ENTITY_TYPE, [
+            'relationshipPanels' => [
+                $foreignLink => [
+                    'actionList' => [
+                        [
+                            'label' => 'Unlink All',
+                            'action' => 'unlinkAllRelated',
+                            'acl' => 'edit',
+                            'data' => [
+                                'link' => $foreignLink,
+                            ],
+                        ],
+                    ],
+                    'rowActionsView' => 'crm:views/target-list/record/row-actions/default',
+                    'view' => 'crm:views/target-list/record/panels/relationship',
+                    'massSelect' => true,
+                    'removeDisabled' => true,
+                ],
+            ],
+        ]);
+
+        $this->metadata->set('recordDefs', TargetList::ENTITY_TYPE, [
+            'relationships' => [
+                $foreignLink => [
+                    'massLink' => true,
+                    'linkRequiredForeignAccess' => 'read',
+                    'mandatoryAttributeList' => ['targetListIsOptedOut'],
+                ],
+            ],
+        ]);
+
+        $targetLinkList = $this->metadata->get(['scopes', TargetList::ENTITY_TYPE, 'targetLinkList']) ?? [];
+
+        if (!in_array($foreignLink, $targetLinkList)) {
+            $targetLinkList[] = $foreignLink;
+
+            $this->metadata->set('scopes', TargetList::ENTITY_TYPE, [
+                'targetLinkList' => $targetLinkList,
+            ]);
+        }
+
+        $this->metadata->save();
+    }
+}

application/Espo/Tools/LinkManager/Hook/Hooks/TargetListDelete.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\Tools\LinkManager\Hook\Hooks;
+
+use Espo\Core\Templates\Entities\Company;
+use Espo\Core\Templates\Entities\Person;
+use Espo\Tools\LinkManager\Hook\DeleteHook;
+use Espo\Tools\LinkManager\Params;
+use Espo\Tools\LinkManager\Type;
+use Espo\Modules\Crm\Entities\TargetList;
+
+use Espo\Core\Utils\Metadata;
+
+class TargetListDelete implements DeleteHook
+{
+    public function __construct(private Metadata $metadata)
+    {}
+
+    public function process(Params $params): void
+    {
+        $toProcess =
+            (
+                $params->getEntityType() === TargetList::ENTITY_TYPE ||
+                $params->getForeignEntityType() === TargetList::ENTITY_TYPE
+            ) &&
+            $params->getType() === Type::MANY_TO_MANY;
+
+        if (!$toProcess) {
+            return;
+        }
+
+        [$entityType, $link, $foreignLink] = $params->getEntityType() === TargetList::ENTITY_TYPE ?
+            [
+                $params->getForeignEntityType(),
+                $params->getForeignLink(),
+                $params->getLink(),
+            ] :
+            [
+                $params->getEntityType(),
+                $params->getLink(),
+                $params->getForeignLink(),
+            ];
+
+        if (!$entityType) {
+            return;
+        }
+
+        $type = $this->metadata->get(['scopes', $entityType, 'type']);
+
+        if (!in_array($type, [Person::TEMPLATE_TYPE, Company::TEMPLATE_TYPE])) {
+            return;
+        }
+
+        if ($link !== 'targetLists') {
+            return;
+        }
+
+        $this->processInternal($entityType, $link, $foreignLink);
+    }
+
+    private function processInternal(string $entityType, string $link, string $foreignLink): void
+    {
+        $this->metadata->delete('entityDefs', $entityType, ['fields.targetListIsOptedOut']);
+
+        $targetLinkList = $this->metadata->get(['scopes', TargetList::ENTITY_TYPE, 'targetLinkList']) ?? [];
+
+        if (in_array($foreignLink, $targetLinkList)) {
+            $targetLinkList = array_diff($targetLinkList, [$foreignLink]);
+
+            $this->metadata->set('scopes', TargetList::ENTITY_TYPE, [
+                'targetLinkList' => $targetLinkList,
+            ]);
+        }
+
+        $this->metadata->delete('clientDefs', TargetList::ENTITY_TYPE, ["relationshipPanels.$foreignLink"]);
+        $this->metadata->delete('recordDefs', TargetList::ENTITY_TYPE, ["relationships.$foreignLink"]);
+
+        $this->metadata->save();
+    }
+}

application/Espo/Tools/LinkManager/Params.php

@@ -0,0 +1,96 @@
+<?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\Tools\LinkManager;
+
+use Espo\Tools\LinkManager\ParamsBuilder;
+
+/**
+ * Immutable.
+ */
+class Params
+{
+    private string $type;
+    private string $entityType;
+    private string $link;
+    private string $foreignLink;
+    private ?string $foreignEntityType;
+    private ?string $name;
+
+    public function __construct(
+        string $type,
+        string $entityType,
+        string $link,
+        ?string $foreignEntityType,
+        string $foreignLink,
+        ?string $name
+    ) {
+        $this->type = $type;
+        $this->entityType = $entityType;
+        $this->link = $link;
+        $this->foreignEntityType = $foreignEntityType;
+        $this->foreignLink = $foreignLink;
+        $this->name = $name;
+    }
+
+    public static function createBuilder(): ParamsBuilder
+    {
+        return new ParamsBuilder();
+    }
+
+    public function getType(): string
+    {
+        return $this->type;
+    }
+
+    public function getEntityType(): string
+    {
+        return $this->entityType;
+    }
+
+    public function getLink(): string
+    {
+        return $this->link;
+    }
+
+    public function getForeignLink(): string
+    {
+        return $this->foreignLink;
+    }
+
+    public function getForeignEntityType(): ?string
+    {
+        return $this->foreignEntityType;
+    }
+
+    public function getName(): ?string
+    {
+        return $this->name;
+    }
+}

application/Espo/Tools/LinkManager/ParamsBuilder.php

@@ -0,0 +1,94 @@
+<?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\Tools\LinkManager;
+
+class ParamsBuilder
+{
+    private string $type;
+    private string $entityType;
+    private string $link;
+    private string $foreignLink;
+    private ?string $foreignEntityType = null;
+    private ?string $name = null;
+
+    public function setType(string $type): self
+    {
+        $this->type = $type;
+
+        return $this;
+    }
+
+    public function setEntityType(string $entityType): self
+    {
+        $this->entityType = $entityType;
+
+        return $this;
+    }
+
+    public function setLink(string $link): self
+    {
+        $this->link = $link;
+
+        return $this;
+    }
+
+    public function setForeignLink(string $foreignLink): self
+    {
+        $this->foreignLink = $foreignLink;
+
+        return $this;
+    }
+
+    public function setForeignEntityType(?string $foreignEntityType): self
+    {
+        $this->foreignEntityType = $foreignEntityType;
+
+        return $this;
+    }
+
+    public function setName(?string $name): self
+    {
+        $this->name = $name;
+
+        return $this;
+    }
+
+    public function build(): Params
+    {
+        return new Params(
+            $this->type,
+            $this->entityType,
+            $this->link,
+            $this->foreignEntityType,
+            $this->foreignLink,
+            $this->name
+        );
+    }
+}

application/Espo/Tools/LinkManager/Type.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\Tools\LinkManager;
+
+class Type
+{
+    public const MANY_TO_MANY = 'manyToMany';
+    public const MANY_TO_ONE = 'manyToOne';
+    public const ONE_TO_MANY = 'oneToMany';
+    public const ONE_TO_ONE_LEFT = 'oneToOneLeft';
+    public const ONE_TO_ONE_RIGHT = 'oneToOneRight';
+    public const CHILDREN_TO_PARENT = 'childrenToParent';
+}