add gc for db

src/server/backend/db/db.js

@@ -185,5 +185,30 @@ module.exports.deleteJSONDataSimple = ( db, identifier ) => {
     } );
 };
 
+const gc = () => {
+    // this function acts as the database garbage collector. TicketTimeout can be changed from the GUI. TODO: Add
+    this.getData( 'temp' ).then( tempData => {
+        let data = tempData;
+        console.info( 'Garbage Collecting' );
+        for ( let item in data ) {
+            if ( new Date( data[ item ][ 'timestamp' ] ).getTime() + ( parseInt( settings.ticketTimeout ) * 1000 ) > new Date().getTime() ) {
+                delete data[ item ];
+                console.debug( 'Garbage collected a session' );
+            }
+        }
+    } );
+};
+
+/*
+    Here, GC-Duty is scheduled to run every so often (defined in settings.config.json file, no GUI setting available.
+    If you are a developer and are thinking about adding a GUI setting for this, please consider that this is a
+    advanced setting and many people might not understand what it changes. The config file is mentioned in the 
+    "advanced settings" section of the admin panel documentation where all the available settings in the config file
+    are explained in some detail.)
+*/
+setInterval( () => {
+    gc();
+}, parseInt( settings.gcInterval ) );
+
 // TODO: Build garbage collector for DB (parse DB every so often (get from settings) 
 // and delete all items where timestamp is older than a certain amount of time (get from settings))