ENH Add versioning to Link

README.md

@@ -40,7 +40,22 @@ class Page extends SiteTree
     ];
 
     private static $has_many = [
-        'HasManyLinks' => Link::class
+        'HasManyLinks' => Link::class,
+    ];
+
+    private static array $owns = [
+        'HasOneLink',
+        'HasManyLinks',
+    ];
+
+    private static array $cascade_deletes = [
+        'HasOneLink',
+        'HasManyLinks',
+    ];
+
+    private static array $cascade_duplicates = [
+        'HasOneLink',
+        'HasManyLinks',
     ];
 
     public function getCMSFields()
@@ -65,6 +80,8 @@ class Page extends SiteTree
 
 Note that you also need to add a `has_one` relation on the `Link` model to match your `has_many` here. See [official docs about `has_many`](https://docs.silverstripe.org/en/developer_guides/model/relations/#has-many)
 
+Adding the relationship(s) to the `$owns`, `$cascade_deletes`, and `$cascade_duplicates` config properties is required for versioning (publishing) to work correctly.
+
 ## Default title for each link type
 
 By default, if the title for the link has not been set, then the default title will be used instead according to the type of link that is used. Default link is not stored in the database as link title. This value is used only when rendering page content. 
@@ -88,6 +105,19 @@ class ExternalLinkExtension extends Extension
 
 ```
 
+## Unversioned links
+
+The `Link` model has the `Versioned` extension applied to it by default. If you wish for links to not be versioned, then remove the extension from the `Link` model in the projects `app/_config.php` file.
+
+```php
+// app/_config.php
+
+use SilverStripe\LinkField\Models\Link;
+use SilverStripe\Versioned\Versioned;
+
+Link::remove_extension(Versioned::class);
+```
+
 ## Migrating from Shae Dawson's Linkable module
 
 https://github.com/sheadawson/silverstripe-linkable

client/lang/src/en.json

@@ -3,5 +3,9 @@
     "LinkField.CONFIRM_DELETE": "Deleted link",
     "LinkField.DELETE_ERROR": "Failed to delete link",
     "LinkField.ADD_LINK": "Add Link",
-    "LinkField.CLEAR": "Clear"
+    "LinkField.CLEAR": "Clear",
+    "LinkField.LINK_DRAFT_TITLE": "Link has draft changes",
+    "LinkField.LINK_DRAFT_LABEL": "Draft",
+    "LinkField.LINK_MODIFIED_TITLE": "Link has unpublished changes",
+    "LinkField.LINK_MODIFIED_LABEL": "Modified"
 }

client/src/components/LinkField/LinkField.js

@@ -141,6 +141,7 @@ const LinkField = ({ value = null, onChange, types, actions, isMulti = false  })
         id={linkID}
         title={data[linkID]?.Title}
         description={data[linkID]?.description}
+        versionState={data[linkID]?.versionState}
         typeTitle={type.title || ''}
         onClear={onClear}
         onClick={() => { setEditingID(linkID); }}

client/src/components/LinkPicker/LinkPicker.scss

@@ -45,6 +45,7 @@
   text-align: left;
   margin-right: 0;
   justify-content: space-between;
+  position: relative;
 
   &:not(:last-child) {
     border-bottom: 0;
@@ -63,6 +64,35 @@
     text-decoration: none;
     color: inherit;
   }
+
+  // version-state icon
+  &::before {
+    top: 29px;
+    left: 32px;
+    content: ' ';
+    position: absolute;
+    border: 1px solid $state-draft;
+    border-radius: 100%;
+    bottom: 6px;
+    box-shadow: 0 0 1px .5px $white;
+    display: block;
+    height: 8px;
+    width: 8px;
+    z-index: 1;
+  }
+
+  &--draft::before {
+    background-color: $state-draft-bg;;
+  }
+
+  &--modified::before {
+    background-color: $state-modified-bg;
+  }
+
+  &--unsaved::before,
+  &--published::before {
+    display: none;
+  }
 }
 
 .link-picker__button {
@@ -92,3 +122,13 @@
 .link-picker__url {
   color: $link-color;
 }
+
+.link-picker__title-text {
+  margin-right: 5px;
+}
+
+.link-picker__title .badge {
+  color: #cf3f00;
+  background-color: #fff2ea;
+  padding: 2px 3px 2px 4px;
+}

client/src/components/LinkPicker/LinkPickerTitle.js

@@ -1,4 +1,5 @@
 /* eslint-disable */
+import classnames from 'classnames';
 import i18n from 'i18n';
 import React from 'react';
 import PropTypes from 'prop-types';
@@ -12,11 +13,41 @@ const stopPropagation = (fn) => (e) => {
   fn && fn();
 }
 
-const LinkPickerTitle = ({ id, title, description, typeTitle, onClear, onClick }) => (
-  <div className={classnames('link-picker__link', 'form-control')}>
+const getVersionedBadge = (versionState) => {
+  let title = '';
+  let label = ''
+  if (versionState === 'draft') {
+    title = i18n._t('LinkField.LINK_DRAFT_TITLE', 'Link has draft changes');
+    label = i18n._t('LinkField.LINK_DRAFT_LABEL', 'Draft');
+  } else if (versionState === 'modified') {
+    title = i18n._t('LinkField.LINK_MODIFIED_TITLE', 'Link has unpublished changes');
+    label = i18n._t('LinkField.LINK_MODIFIED_LABEL', 'Modified');
+  } else {
+    return null;
+  }
+  const className = classnames('badge', `status-${versionState}`);
+  return <span className={className} title={title}>{label}</span>;
+};
+
+const LinkPickerTitle = ({ id, title, description, versionState, typeTitle, onClear, onClick }) => {
+  const classes = {
+    'link-picker__link': true,
+    'form-control': true,
+  };
+  if (versionState) {
+    classes[` link-picker__link--${versionState}`] = true;
+  }
+  if (title && title.length > 25) {
+    title = title.substring(0, 25) + '...';
+  }
+  const className = classnames(classes);
+  return <div className={className}>
     <Button className="link-picker__button font-icon-link"  color="secondary" onClick={stopPropagation(onClick)}>
       <div className="link-picker__link-detail">
-      <div className="link-picker__title">{title}</div>
+      <div className="link-picker__title">
+        <span className="link-picker__title-text">{title}</span>
+        {getVersionedBadge(versionState)}
+      </div>
       <small className="link-picker__type">
         {typeTitle}:&nbsp;
         <span className="link-picker__url">{description}</span>
@@ -25,12 +56,13 @@ const LinkPickerTitle = ({ id, title, description, typeTitle, onClear, onClick }
     </Button>
     <Button className="link-picker__clear" color="link" onClick={stopPropagation(() => onClear(id))}>{i18n._t('LinkField.CLEAR', 'Clear')}</Button>
   </div>
-);
+};
 
 LinkPickerTitle.propTypes = {
   id: PropTypes.number.isRequired,
   title: PropTypes.string,
   description: PropTypes.string,
+  versionState: PropTypes.string,
   typeTitle: PropTypes.string.isRequired,
   onClear: PropTypes.func.isRequired,
   onClick: PropTypes.func.isRequired,

composer.json

@@ -4,7 +4,8 @@
     "type": "silverstripe-vendormodule",
     "require": {
         "php": "^8.1",
-        "silverstripe/cms": "^5"
+        "silverstripe/cms": "^5",
+        "silverstripe/versioned": "^2"
     },
     "require-dev": {
         "silverstripe/recipe-testing": "^3",

src/Controllers/LinkFieldController.php

@@ -113,6 +113,7 @@ private function getLinkData(Link $link): array
         }
         $data = $link->jsonSerialize();
         $data['description'] = $link->getDescription();
+        $data['versionState'] = $link->getVersionedState();
         return $data;
     }
 

src/Models/Link.php

@@ -5,7 +5,6 @@
 use InvalidArgumentException;
 use ReflectionException;
 use SilverStripe\Core\ClassInfo;
-use SilverStripe\Core\Config\Config;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Forms\CompositeValidator;
 use SilverStripe\Forms\DropdownField;
@@ -14,6 +13,7 @@
 use SilverStripe\LinkField\Type\Registry;
 use SilverStripe\ORM\DataObject;
 use SilverStripe\ORM\FieldType\DBHTMLText;
+use SilverStripe\Versioned\Versioned;
 
 /**
  * A Link Data Object. This class should be a subclass, and you should never directly interact with a plain Link
@@ -31,6 +31,10 @@ class Link extends DataObject
         'OpenInNew' => 'Boolean',
     ];
 
+    private static array $extensions = [
+        Versioned::class,
+    ];
+
     /**
      * In-memory only property used to change link type
      * This case is relevant for CMS edit form which doesn't use React driven UI
@@ -277,6 +281,25 @@ public function getURL(): string
         return '';
     }
 
+    public function getVersionedState(): string
+    {
+        if (!$this->exists()) {
+            return 'unsaved';
+        }
+        if ($this->hasExtension(Versioned::class)) {
+            if ($this->isPublished()) {
+                if ($this->isModifiedOnDraft()) {
+                    return 'modified';
+                }
+                return 'published';
+            }
+            return 'draft';
+        }
+        // Unversioned - links are saved in the modal so there is no 'dirty state' and
+        // when undversioned saved is the same thing as published
+        return 'published';
+    }
+
     /**
      * Get all link types except the generic one
      *

tests/php/Controllers/LinkFieldControllerTest.php

@@ -374,6 +374,8 @@ public function testLinkData(
             $data = json_decode($response->getBody(), true);
             $this->assertSame($id, $data['ID']);
             $this->assertSame('0123456789', $data['Phone']);
+            $link = $this->getFixtureLink();
+            $this->assertSame($link->getVersionedState(), $data['versionState']);
         }
     }
 

tests/php/Models/LinkTest.php

@@ -241,6 +241,27 @@ public function linkTypeEnabledProvider(): array
         ];
     }
 
+    public function testGetVersionedState(): void
+    {
+        // Versioned Link
+        $link = Link::create(['Title' => 'abc']);
+        $this->assertTrue(Link::has_extension(Versioned::class));
+        $this->assertEquals('unsaved', $link->getVersionedState());
+        $link->write();
+        $this->assertEquals('draft', $link->getVersionedState());
+        $link->publishSingle();
+        $this->assertEquals('published', $link->getVersionedState());
+        $link->Title = 'def';
+        $link->write();
+        $this->assertEquals('modified', $link->getVersionedState());
+        // Unversioned Link
+        Link::remove_extension(Versioned::class);
+        $link = Link::create(['Title' => '123']);
+        $this->assertEquals('unsaved', $link->getVersionedState());
+        $link->write();
+        $this->assertEquals('published', $link->getVersionedState());
+    }
+
     /**
      * @param string $identifier
      * @param string $class
@@ -250,14 +271,9 @@ public function linkTypeEnabledProvider(): array
      */
     public function testGetUrl(string $identifier, string $class, string $expected): void
     {
-        Versioned::withVersionedMode(function () use ($identifier, $class, $expected): void {
-            Versioned::set_stage(Versioned::LIVE);
-
-            /** @var Link $link */
-            $link = $this->objFromFixture($class, $identifier);
-
-            $this->assertSame($expected, $link->getURL(), 'We expect specific URL value');
-        });
+        /** @var Link $link */
+        $link = $this->objFromFixture($class, $identifier);
+        $this->assertSame($expected, $link->getURL(), 'We expect specific URL value');
     }
 
     public function linkUrlCasesDataProvider(): array