calculate versions size per user

apps/files_versions/appinfo/database.xml

+<?xml version="1.0" encoding="ISO-8859-1" ?>
+<database>
+
+ <name>*dbname*</name>
+ <create>true</create>
+ <overwrite>false</overwrite>
+
+ <charset>utf8</charset>
+
+ <table>
+
+  <name>*dbprefix*files_versions</name>
+
+  <declaration>
+
+   <field>
+    <name>user</name>
+    <type>text</type>
+    <default></default>
+    <notnull>true</notnull>
+    <length>50</length>
+   </field>
+   <field>
+    <name>size</name>
+    <type>text</type>
+    <default></default>
+    <notnull>true</notnull>
+    <length>50</length>
+   </field>
+   
+  </declaration>
+
+ </table>
+
+</database>

apps/files_versions/appinfo/version

-1.0.2
\ No newline at end of file
+1.0.3
\ No newline at end of file

apps/files_versions/lib/versions.php

@@ -45,6 +45,37 @@ class Storage {
 		return array($uid, $filename);
 	}
 	
+	/**
+	 * get current size of all versions from a given user
+	 * 
+	 * @param $user user who owns the versions
+	 * @return mixed versions size or false if no versions size is stored
+	 */
+	private static function getVersionsSize($user) {
+		$query = \OC_DB::prepare('SELECT size FROM *PREFIX*files_versions WHERE user=?');
+		$result = $query->execute(array($user))->fetchAll();
+		
+		if ($result) {
+			return $result[0]['size'];
+		}
+		return false;
+	}
+	
+	/**
+	 * write to the database how much space is in use for versions
+	 * 
+	 * @param $user owner of the versions
+	 * @param $size size of the versions
+	 */
+	private static function setVersionsSize($user, $size) {
+		if ( self::getVersionsSize($user) === false) {
+			$query = \OC_DB::prepare('INSERT INTO *PREFIX*files_versions (size, user) VALUES (?, ?)');
+		}else {
+			$query = \OC_DB::prepare('UPDATE *PREFIX*files_versions SET size=? WHERE user=?');
+		}
+		$query->execute(array($size, $user));
+	}
+	
 	/**
 	 * store a new version of a file.
 	 */
@@ -73,17 +104,19 @@ class Storage {
 			}
 
 			// store a new version of a file
-			$result = $users_view->copy('files'.$filename, 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename));
-			if (  ($versionsSize = \OCP\Config::getAppValue('files_versions', 'size')) === null ) {
+			$users_view->copy('files'.$filename, 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename));
+			$versionsSize = self::getVersionsSize($uid);
+			if (  $versionsSize === false || $versionSize < 0 ) {
 				$versionsSize = self::calculateSize($uid);
 			}
+
 			$versionsSize += $users_view->filesize('files'.$filename);
-			
+
 			// expire old revisions if necessary
 			$newSize = self::expire($filename, $versionsSize);
-			
+
 			if ( $newSize != $versionsSize ) {
-				\OCP\Config::setAppValue('files_versions', 'size', $versionsSize);
+				self::setVersionsSize($uid, $newSize);
 			}
 		}
 	}
@@ -98,14 +131,15 @@ class Storage {
 		
 		$abs_path = \OCP\Config::getSystemValue('datadirectory').$versions_fileview->getAbsolutePath('').$filename.'.v';
 		if( ($versions = self::getVersions($uid, $filename)) ) {
-			if (  ($versionsSize = \OCP\Config::getAppValue('files_versions', 'size')) === null ) {
+			$versionsSize = self::getVersionsSize($uid);
+			if ( $versionsSize === false || $versionsSize < 0 ) {
 				$versionsSize = self::calculateSize($uid);
 			}
 			foreach ($versions as $v) {
 				unlink($abs_path . $v['version']);
 				$versionsSize -= $v['size'];
 			}
-			\OCP\Config::setAppValue('files_versions', 'size', $versionsSize);
+			self::setVersionsSize($uid, $versionsSize);
 		}
 	}
 	
@@ -314,12 +348,13 @@ class Storage {
 				$quota = \OCP\Util::computerFileSize(\OC_Appconfig::getValue('files', 'default_quota'));
 			}
 			if ( $quota == null ) {
-				$quota = \OC\Files\Filesystem::free_space('/');
+				$quota = \OC\Files\Filesystem::free_space('/') / count(\OCP\User::getUsers());
 			}
 			
 			// make sure that we have the current size of the version history
 			if ( $versionsSize === null ) {
-				if (  ($versionsSize = \OCP\Config::getAppValue('files_versions', 'size')) === null ) {
+				$versionsSize = self::getVersionsSize($uid);
+				if (  $versionsSize === false || $versionsSize < 0 ) {
 					$versionsSize = self::calculateSize($uid);
 				}
 			}