core (memory, sqlite): new fileGetUsedSpace method

sat/memory/sqlite.py

@@ -986,6 +986,15 @@ class SqliteStorage(object):
         d.addErrback(lambda failure: log.error(_("Can't save file metadata for [{profile}]: {reason}".format(profile=client.profile, reason=failure))))
         return d
 
+    async def fileGetUsedSpace(self, client, owner):
+        """Get space used by owner of file"""
+        query = "SELECT SUM(size) FROM files WHERE owner=? AND type='file' AND profile_id=?"
+        ret = await self.dbpool.runQuery(
+            query,
+            (owner.userhost(), self.profiles[client.profile])
+        )
+        return ret[0][0]
+
     def _fileUpdate(self, cursor, file_id, column, update_cb):
         query = 'SELECT {column} FROM files where id=?'.format(column=column)
         for i in range(5):