API Move logic from silverstripe/cms into central place

src/Model/ModelData.php

@@ -74,11 +74,38 @@ class ModelData
 
     private array $objCache = [];
 
+    private $_cache_statusFlags = null;
+
     public function __construct()
     {
         // no-op
     }
 
+    /**
+     * Flags provides the user with additional data about the current page status.
+     *
+     * Mostly this is used for versioning, but can be used for other purposes (e.g. localisation).
+     * Each page can have more than one status flag.
+     *
+     * Returns an associative array of a unique key to a (localized) title for the flag.
+     * The unique key can be reused as a CSS class.
+     *
+     * Example (simple):
+     *   "deletedonlive" => "Deleted"
+     *
+     * Example (with optional title attribute):
+     *   "deletedonlive" => ['text' => "Deleted", 'title' => 'This page has been deleted']
+     */
+    public function getStatusFlags(bool $cached = true): array
+    {
+        if (!$this->_cache_statusFlags || !$cached) {
+            $flags = [];
+            $this->extend('updateStatusFlags', $flags);
+            $this->_cache_statusFlags = $flags;
+        }
+        return $this->_cache_statusFlags;
+    }
+
     // -----------------------------------------------------------------------------------------------------------------
 
     // FIELD GETTERS & SETTERS -----------------------------------------------------------------------------------------
@@ -545,6 +572,20 @@ public function Debug(): ModelData|string
         return ModelDataDebugger::create($this);
     }
 
+    /**
+     * Clears record-specific cached data.
+     *
+     * @param boolean $persistent When true will also clear persistent data stored in the Cache system.
+     *                            When false will just clear session-local cached data
+     */
+    public function flushCache(bool $persistent = true): static
+    {
+        $this->objCacheClear();
+        $this->_cache_statusFlags = null;
+        $this->extend('onFlushCache');
+        return $this;
+    }
+
     /**
      * Generate the cache name for a field
      */

src/ORM/DataObject.php

@@ -116,17 +116,22 @@ class DataObject extends ModelData implements DataObjectInterface, i18nEntityPro
 {
     /**
      * Human-readable singular name.
-     * @var string
-     * @config
      */
-    private static $singular_name = null;
+    private static ?string $singular_name = null;
 
     /**
      * Human-readable plural name
-     * @var string
-     * @config
      */
-    private static $plural_name = null;
+    private static ?string $plural_name = null;
+
+    /**
+     * Description of the class.
+     * Unlike most configuration, this is usually used uninherited, meaning it should be defined
+     * on each subclass.
+     *
+     * Used in some areas of the CMS, e.g. when selecting what type of record to create.
+     */
+    private static ?string $class_description = null;
 
     /**
      * @config
@@ -946,6 +951,27 @@ public function i18n_plural_name()
         return _t(static::class . '.PLURALNAME', $this->plural_name());
     }
 
+    /**
+     * Get description for this class
+     */
+    public function classDescription(): ?string
+    {
+        return static::config()->get('class_description', Config::UNINHERITED);
+    }
+
+    /**
+     * Get localised description for this class
+     */
+    public function i18nClassDescription(): ?string
+    {
+        $placeholder = 'PLACEHOLDER_DESCRIPTION';
+        $description = _t(static::class.'.CLASS_DESCRIPTION', $this->classDescription() ?? $placeholder);
+        if ($description === $placeholder) {
+            return null;
+        }
+        return $description;
+    }
+
     /**
      * Standard implementation of a title/label for a specific
      * record. Tries to find properties 'Title' or 'Name',
@@ -3509,14 +3535,11 @@ public static function get_one($callerClass = null, $filter = "", $cache = true,
     }
 
     /**
-     * Flush the cached results for all relations (has_one, has_many, many_many)
-     * Also clears any cached aggregate data.
+     * @inheritDoc
      *
-     * @param boolean $persistent When true will also clear persistent data stored in the Cache system.
-     *                            When false will just clear session-local cached data
-     * @return static $this
+     * Also flush the cached results for all relations (has_one, has_many, many_many)
      */
-    public function flushCache($persistent = true)
+    public function flushCache(bool $persistent = true): static
     {
         if (static::class == DataObject::class) {
             DataObject::$_cache_get_one = [];
@@ -3530,11 +3553,9 @@ public function flushCache($persistent = true)
             }
         }
 
-        $this->extend('onFlushCache');
-
         $this->components = [];
         $this->eagerLoadedData = [];
-        return $this;
+        return parent::flushCache($persistent);
     }
 
     /**
@@ -3561,7 +3582,7 @@ public static function flush_and_destroy_cache()
      */
     public static function reset()
     {
-        DBEnum::flushCache();
+        DBEnum::clearStaticCache();
         ClassInfo::reset_db_cache();
         static::getSchema()->reset();
         DataObject::$_cache_get_one = [];

src/ORM/FieldType/DBEnum.php

@@ -38,7 +38,7 @@ class DBEnum extends DBString
     /**
      * Clear all cached enum values.
      */
-    public static function flushCache(): void
+    public static function clearStaticCache(): void
     {
         DBEnum::$enum_cache = [];
     }
@@ -176,7 +176,7 @@ public function getEnum(): array
      * If table or name are not set, or if it is not a valid field on the given table,
      * then only known enum values are returned.
      *
-     * Values cached in this method can be cleared via `DBEnum::flushCache();`
+     * Values cached in this method can be cleared via `DBEnum::clearStaticCache();`
      */
     public function getEnumObsolete(): array
     {