current code from svn, revision 62608

1 files changed, 102 insertions, 0 deletions

diff --git a/lib/classes/FilesSearch/NotificationObserver.php b/lib/classes/FilesSearch/NotificationObserver.php
new file mode 100644
index 0000000..26eaf80
--- /dev/null
+++ b/lib/classes/FilesSearch/NotificationObserver.php
@@ -0,0 +1,102 @@
+<?php
+
+namespace FilesSearch;
+
+use NotificationCenter;
+
+/**
+ * This class observes changes in file refs and folders and re-indexes
+ * if applicable.
+ *
+ * @license GPL2 or any later version
+ *
+ * @since   Stud.IP 4.1
+ */
+class NotificationObserver
+{
+    /**
+     * Observe every change in files, file refs and folders.
+     */
+    public static function initialize()
+    {
+        NotificationCenter::addObserver(self::class, 'observeFileRef', 'FileRefDidCreate');
+        NotificationCenter::addObserver(self::class, 'observeFileRef', 'FileRefDidDelete');
+        NotificationCenter::addObserver(self::class, 'observeFileRef', 'FileRefDidUpdate');
+
+        NotificationCenter::addObserver(self::class, 'observeFolder', 'FolderDidCreate');
+        NotificationCenter::addObserver(self::class, 'observeFolder', 'FolderDidDelete');
+        NotificationCenter::addObserver(self::class, 'observeFolder', 'FolderDidUpdate');
+    }
+
+    /**
+     * Observe changes of FileRefs. Depending on the event either
+     * create, drop or update the index.
+     *
+     * @param FileRef $fileRef  the observed file
+     */
+    public static function observeFileRef($event, \FileRef $fileRef)
+    {
+        switch ($event) {
+            case 'FileRefDidCreate':
+                FilesIndexManager::indexFile($fileRef);
+                break;
+
+            case 'FileRefDidDelete':
+                FilesIndexManager::dropIndexForFile($fileRef);
+                break;
+
+            case 'FileRefDidUpdate':
+                if (self::isFileRefStale($fileRef)) {
+                    FilesIndexManager::dropIndexForFile($fileRef);
+                    FilesIndexManager::indexFile($fileRef);
+                }
+                break;
+        }
+    }
+
+    /**
+     * Observe changes of Folders. Depending on the event either
+     * create, drop or update the indexes.
+     *
+     * @param Folder $folder  the observed folder
+     */
+    public static function observeFolder($event, \Folder $folder)
+    {
+        switch ($event) {
+            case 'FolderDidCreate':
+                FilesIndexManager::indexFolder($folder);
+                break;
+
+            case 'FolderDidDelete':
+                FilesIndexManager::dropIndexForFolder($folder);
+                break;
+
+            case 'FolderDidUpdate':
+                if (self::isFolderStale($folder)) {
+                    FilesIndexManager::dropIndexForFolder($folder);
+                    FilesIndexManager::indexFolder($folder);
+                }
+                break;
+        }
+    }
+
+    private static function isFileRefStale(\FileRef $fileRef)
+    {
+        return self::isStale($fileRef, ['user_id', 'mkdate', 'chdate', 'folder_id', 'name', 'description']);
+    }
+
+    private static function isFolderStale(\Folder $folder)
+    {
+        return self::isStale($folder, ['range_id', 'range_type', 'folder_type']);
+    }
+
+    private static function isStale(\SimpleORMap $resource, array $fields)
+    {
+        foreach ($fields as $field) {
+            if ($resource->isFieldDirty($field)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}