[tepl] Metadata: finish to implement query_info_*()

[Sébastien Wilmet <swilmet src gnome org>]

commit 7a4b82bee41bc4f6875ffe2c30cd0ad3534b757f
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Apr 15 22:00:10 2020 +0200

    Metadata: finish to implement query_info_*()

 tepl/tepl-metadata.c | 69 +++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 60 insertions(+), 9 deletions(-)
---
diff --git a/tepl/tepl-metadata.c b/tepl/tepl-metadata.c
index 5cd5ee6..2373b96 100644
--- a/tepl/tepl-metadata.c
+++ b/tepl/tepl-metadata.c
@@ -50,6 +50,52 @@ use_gvfs_metadata (void)
 #endif
 }
 
+static void
+do_query_info (GTask *task)
+{
+       TeplMetadataStore *store = tepl_metadata_store_get_singleton ();
+       GFile *location = g_task_get_source_object (task);
+       GFileInfo *file_info;
+
+       file_info = _tepl_metadata_store_get_metadata_for_location (store, location);
+       if (file_info == NULL)
+       {
+               /* See the Returns of g_file_query_info_finish(). */
+               file_info = g_file_info_new ();
+       }
+
+       g_task_return_pointer (task, file_info, g_object_unref);
+       g_object_unref (task);
+}
+
+static void
+store_notify_loaded_cb (TeplMetadataStore *store,
+                       GParamSpec        *pspec,
+                       GTask             *task)
+{
+       do_query_info (task);
+}
+
+static void
+store_load_cb (GObject      *source_object,
+              GAsyncResult *result,
+              gpointer      user_data)
+{
+       TeplMetadataStore *store = TEPL_METADATA_STORE (source_object);
+       GTask *task = G_TASK (user_data);
+       GError *error = NULL;
+
+       _tepl_metadata_store_load_finish (store, result, &error);
+       if (error != NULL)
+       {
+               g_task_return_error (task, error);
+               g_object_unref (task);
+               return;
+       }
+
+       do_query_info (task);
+}
+
 void
 _tepl_metadata_query_info_async (GFile               *location,
                                 gint                 io_priority,
@@ -86,19 +132,24 @@ _tepl_metadata_query_info_async (GFile               *location,
 
        if (_tepl_metadata_store_is_loaded (store))
        {
-               GFileInfo *file_info;
-
-               file_info = _tepl_metadata_store_get_metadata_for_location (store, location);
+               do_query_info (task);
+               return;
+       }
 
-               g_task_return_pointer (task, file_info, g_object_unref);
-               g_object_unref (task);
+       if (_tepl_metadata_store_is_loading (store))
+       {
+               g_signal_connect (store,
+                                 "notify::loaded",
+                                 G_CALLBACK (store_notify_loaded_cb),
+                                 task);
                return;
        }
 
-       /* TODO check if it is load*ing*, if not, load(), if yes, connect to the
-        * notify::loaded signal.
-        * Or find an easier way to handle all of this.
-        */
+       _tepl_metadata_store_load_async (store,
+                                        io_priority,
+                                        cancellable,
+                                        store_load_cb,
+                                        task);
 }
 
 GFileInfo *