Prepare speed up (#2419)

* FlatpakBackend: Fix identifying main thread

* Add normalize_component_id Utils function

---------

Co-authored-by: Danielle Foré <danielle@elementary.io>

Author: leolost2605

src/Core/FlatpakBackend.vala

@@ -1333,7 +1333,7 @@ public class AppCenterCore.FlatpakBackend : Object, Backend {
 
         package_list = new_package_list;
 
-        if (MainContext.get_thread_default () == null) {
+        if (Thread.self<bool> () != worker_thread) {
             // We are in the main thread so update immediately
             update_package_store (removed, added);
         } else {

src/Core/Package.vala

@@ -147,11 +147,7 @@ public class AppCenterCore.Package : Object {
                 return _component_id;
             }
 
-            _component_id = component.id;
-            if (_component_id.has_suffix (".desktop")) {
-                // ".desktop" is always 8 bytes in UTF-8 so we can just chop 8 bytes off the end
-                _component_id = _component_id.substring (0, _component_id.length - 8);
-            }
+            _component_id = Utils.normalize_component_id (component.id);
 
             return _component_id;
         }

src/Utils.vala

@@ -83,4 +83,13 @@ namespace Utils {
     public static bool is_running_in_guest_session () {
         return Environment.get_user_name ().has_prefix ("guest-");
     }
+
+    public static string normalize_component_id (string component_id) {
+        if (component_id.has_suffix (".desktop")) {
+            // ".desktop" is always 8 bytes in UTF-8 so we can just chop 8 bytes off the end
+            return component_id.substring (0, component_id.length - 8);
+        }
+
+        return component_id;
+    }
 }