EditAsset: allow changing an asset's parent album

models/Asset.php

@@ -398,6 +398,45 @@ class Asset
 		return $this->id_user_uploaded == $user->getUserId();
 	}
 
+	public function moveToSubDir($destSubDir)
+	{
+		// Verify the original exists
+		$source = ASSETSDIR . '/' . $this->subdir . '/' . $this->filename;
+		if (!file_exists($source))
+			return -1;
+
+		// Ensure the intended target file doesn't exist yet
+		$destDir = ASSETSDIR . '/' . $destSubDir;
+		$destFile = $destDir . '/' . $this->filename;
+
+		if (file_exists($destFile))
+			return -2;
+
+		// Can we write to the target directory?
+		if (!is_writable($destDir))
+			return -3;
+
+		// Perform move
+		if (rename($source, $destFile))
+		{
+			$this->subdir = $destSubDir;
+			$this->slug = $this->subdir . '/' . $this->title;
+			Registry::get('db')->query('
+				UPDATE assets
+				SET subdir = {string:subdir},
+					slug = {string:slug}
+				WHERE id_asset = {int:id_asset}',
+				[
+					'id_asset' => $this->id_asset,
+					'subdir' => $this->subdir,
+					'slug' => $this->slug,
+				]);
+			return true;
+		}
+
+		return -4;
+	}
+
 	public function replaceFile($filename)
 	{
 		// No filename? Abort!