NEW Default link title for each link type

README.md

@@ -65,6 +65,29 @@ 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)
 
+## 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. 
+
+The developer also can set his own default title value using an extension by using `updateDefaultLinkTitle` method for each link type class.
+*app/src/ExternalLinkExtension*
+```php
+<?php
+
+namespace App\Extensions;
+
+use SilverStripe\Core\Extension;
+
+class ExternalLinkExtension extends Extension
+{
+    public function updateDefaultLinkTitle(&$defaultLinkTitle): void
+    {
+        $defaultLinkTitle = sprintf('External link: %s', $this->owner->ExternalUrl);
+    }
+}
+
+```
+
 ## Migrating from Shae Dawson's Linkable module
 
 https://github.com/sheadawson/silverstripe-linkable

lang/en.yml

@@ -18,6 +18,7 @@ en:
     KEYS_ARE_NOT_ARRAY: 'If `keys` is provdied, it must be an array'
     LINK_TYPE_TITLE: 'Link Type'
     LINK_FIELD_TITLE: 'Title'
+    LINK_FIELD_TITLE_DESCRIPTION: 'If left blank, default title will be used'
     NO_CLASSNAME: '"{class}": All types should reference a valid classname'
     NOT_REGISTERED_LINKTYPE: '"{class}": "{typekey}" is not a registered Link Type.'
     NOTHING_TO_PROCESS: "Nothing to process for `{table}`\r\n"
@@ -32,3 +33,5 @@ en:
     UNAUTHORIZED: 'Unauthorized'
     UPDATE_LINK: 'Update link'
     VERSIONED_STATUS_MISMATCH: 'Linkable and LinkField do not have matching Versioned applications. Make sure that both are either un-Versioned or Versioned'
+  SilverStripe\LinkField\Models\SiteTreeLink:
+    MISSING_DEFAULT_TITLE: 'Page missing'

src/Models/EmailLink.php

@@ -38,4 +38,9 @@ public function getURL(): string
     {
         return $this->Email ? sprintf('mailto:%s', $this->Email) : '';
     }
+
+    public function getDefaultTitle(): string
+    {
+        return $this->getDescription();
+    }
 }

src/Models/ExternalLink.php

@@ -35,4 +35,9 @@ public function getURL(): string
     {
         return $this->ExternalUrl ?: '';
     }
+
+    public function getDefaultTitle(): string
+    {
+        return $this->getDescription();
+    }
 }

src/Models/FileLink.php

@@ -24,12 +24,18 @@ public function getCMSFields(): FieldList
 
     public function getDescription(): string
     {
-        return $this->File()?->getFilename() ?? '';
+        $file = $this->File();
+        return $file->exists() ? (string) $file->getFilename() : '';
     }
 
     public function getURL(): string
     {
         $file = $this->File();
         return $file->exists() ? (string) $file->getURL() : '';
     }
+
+    public function getDefaultTitle(): string
+    {
+        return $this->getDescription();
+    }
 }

src/Models/Link.php

@@ -5,6 +5,7 @@
 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;
@@ -68,6 +69,7 @@ public function getCMSFields(): FieldList
 
             $titleField = $fields->dataFieldByName('Title');
             $titleField->setTitle(_t('LinkField.LINK_FIELD_TITLE', 'Title'));
+            $titleField->setDescription(_t('LinkField.LINK_FIELD_TITLE_DESCRIPTION', 'If left blank, default title will be used'));
 
             $openInNewField = $fields->dataFieldByName('OpenInNew');
             $openInNewField->setTitle(_t('LinkField.OPEN_IN_NEW_TITLE', 'Open in new window?'));
@@ -290,4 +292,23 @@ private function getLinkTypes(): array
 
         return $types;
     }
+
+    public function getDisplayTitle(): string
+    {
+        // If we have a title, we can just bail out without any changes
+        if ($this->Title && $this->getURL()) {
+            return $this->Title;
+        }
+
+        $defaultLinkTitle = $this->getDefaultTitle();
+
+        $this->extend('updateDefaultLinkTitle', $defaultLinkTitle);
+
+        return $defaultLinkTitle;
+    }
+
+    public function getDefaultTitle(): string
+    {
+        return $this->getDescription() ?: $this->getURL();
+    }
 }

src/Models/PhoneLink.php

@@ -33,4 +33,9 @@ public function getURL(): string
     {
         return $this->Phone ? sprintf('tel:%s', $this->Phone) : '';
     }
+
+    public function getDefaultTitle(): string
+    {
+        return $this->getDescription();
+    }
 }

src/Models/SiteTreeLink.php

@@ -134,4 +134,20 @@ public function getTitle(): ?string
         // Use page title as a default value in case CMS user didn't provide the title
         return $page->Title;
     }
+
+    public function getDefaultTitle(): string
+    {
+        $page = $this->Page();
+        $pageExist = $this->Page()->exists();
+
+        // If the page doesn't exist, we can't get the title
+        if (!$pageExist) {
+            return _t(
+                static::class . '.MISSING_DEFAULT_TITLE',
+                'Page missing',
+            );
+        }
+
+        return $page->Title;
+    }
 }

templates/SilverStripe/LinkField/Models/Link.ss

@@ -1 +1 @@
-<a href="$URL" <% if $OpenInNew %>target="_blank" rel="noopener noreferrer"<% end_if %>>$Title</a>
+<a href="$URL" <% if $OpenInNew %>target="_blank" rel="noopener noreferrer"<% end_if %>>$DisplayTitle</a>

tests/php/Models/Extensions/ExternalLinkExtension.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace SilverStripe\LinkField\Tests\Models\Extensions;
+
+use SilverStripe\Dev\TestOnly;
+use SilverStripe\ORM\DataExtension;
+
+class ExternalLinkExtension extends DataExtension implements TestOnly
+{
+    public function updateDefaultLinkTitle(&$defaultLinkTitle): void
+    {
+        $defaultLinkTitle = sprintf('External Link: %s', $this->owner->getURL());
+    }
+}

tests/php/Models/LinkTest.php

@@ -20,6 +20,7 @@
 use SilverStripe\ORM\DataObject;
 use SilverStripe\ORM\ValidationException;
 use SilverStripe\Versioned\Versioned;
+use SilverStripe\LinkField\Tests\Models\Extensions\ExternalLinkExtension;
 
 class LinkTest extends SapphireTest
 {
@@ -28,6 +29,12 @@ class LinkTest extends SapphireTest
      */
     protected static $fixture_file = 'LinkTest.yml';
 
+    protected static $required_extensions = [
+        ExternalLink::class => [
+            ExternalLinkExtension::class,
+        ],
+    ];
+
     protected function setUp(): void
     {
         parent::setUp();
@@ -329,4 +336,71 @@ public function linkUrlCasesDataProvider(): array
             ],
         ];
     }
+
+    function linkDefaultTitleDataProvider(): array
+    {
+        return [
+            'page link' => [
+                'page-link-1',
+                SiteTreeLink::class,
+                'PageLink1'
+            ],
+            'email link' => [
+                'email-link-with-email',
+                EmailLink::class,
+                'EmailLinkWithEmail'
+            ],
+            'external link' => [
+                'external-link-with-url',
+                ExternalLink::class,
+                'ExternalLinkWithUrl'
+            ],
+            'phone link' => [
+                'phone-link-with-phone',
+                PhoneLink::class,
+                'PhoneLinkWithPhone'
+            ],
+            'file link' => [
+                'file-link-no-image',
+                FileLink::class,
+                'FileLinkNoImage'
+            ],
+            'page link with default title' => [
+                'page-link-with-default-title',
+                SiteTreeLink::class,
+                'Page1'
+            ],
+            'email link with default title' => [
+                'email-link-with-default-title',
+                EmailLink::class,
+                'maxime@silverstripe.com'
+            ],
+            'external link with default title' => [
+                'external-link-with-default-title',
+                ExternalLink::class,
+                'External Link: https://google.com'
+            ],
+            'phone link with default title' => [
+                'phone-link-with-default-title',
+                PhoneLink::class,
+                '+64 4 978 7330'
+            ],
+            'file link with default title' => [
+                'file-link-with-default-title',
+                FileLink::class,
+                '600x400.png'
+            ],
+        ];
+    }
+
+    /**
+     * @dataProvider linkDefaultTitleDataProvider
+     */
+    public function testDefaultLinkTitle(string $identifier, string $class, string $expected): void
+    {
+        /** @var Link $link */
+        $link = $this->objFromFixture($class, $identifier);
+
+        $this->assertEquals($expected, $link->getDisplayTitle());
+    }
 }

tests/php/Models/LinkTest.yml

@@ -36,31 +36,41 @@ SilverStripe\LinkField\Models\SiteTreeLink:
     QueryString: 'param1=value1&param2=option2'
     Anchor: 'my-anchor'
     Page: =>SilverStripe\CMS\Model\SiteTree.page-1
+  page-link-with-default-title:
+    Page: =>SilverStripe\CMS\Model\SiteTree.page-1
 
 SilverStripe\LinkField\Models\EmailLink:
   email-link-with-email:
     Title: 'EmailLinkWithEmail'
     Email: 'maxime@silverstripe.com'
   email-link-no-email:
     Title: 'EmailLinkNoEmail'
+  email-link-with-default-title:
+    Email: 'maxime@silverstripe.com'
 
 SilverStripe\LinkField\Models\ExternalLink:
   external-link-with-url:
     Title: 'ExternalLinkWithUrl'
     ExternalUrl: 'https://google.com'
   external-link-no-url:
     Title: 'ExternalLinkNoUrl'
+  external-link-with-default-title:
+    ExternalUrl: 'https://google.com'
 
 SilverStripe\LinkField\Models\PhoneLink:
   phone-link-with-phone:
     Title: 'PhoneLinkWithPhone'
     Phone: '+64 4 978 7330'
   phone-link-no-phone:
     Title: 'PhoneLinkNoPhone'
+  phone-link-with-default-title:
+    Phone: '+64 4 978 7330'
 
 SilverStripe\LinkField\Models\FileLink:
   file-link-with-image:
     Title: 'FileLinkWithImage'
     File: =>SilverStripe\Assets\Image.image-1
   file-link-no-image:
     Title: 'FileLinkNoImage'
+  file-link-with-default-title:
+    File: =>SilverStripe\Assets\Image.image-1