[gnome-software: 1/2] gs-category-page: Sort recently updated apps by release date

[Philip Withnall <pwithnall src gnome org>]

commit 297ff50ee4d96bd8f2a19446560512edffef32d6
Author: Philip Withnall <pwithnall endlessos org>
Date:   Tue Aug 17 12:22:57 2021 +0100

    gs-category-page: Sort recently updated apps by release date
    
    Signed-off-by: Philip Withnall <pwithnall endlessos org>
    
    Fixes: #1400

 src/gs-category-page.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
---
diff --git a/src/gs-category-page.c b/src/gs-category-page.c
index 979c25c74..833141768 100644
--- a/src/gs-category-page.c
+++ b/src/gs-category-page.c
@@ -450,10 +450,43 @@ gs_category_page_get_category (GsCategoryPage *self)
        return self->category;
 }
 
+static gint
+recently_updated_sort_cb (GtkFlowBoxChild *child1,
+                          GtkFlowBoxChild *child2,
+                          gpointer         user_data)
+{
+       GsSummaryTile *tile1 = GS_SUMMARY_TILE (gtk_bin_get_child (GTK_BIN (child1)));
+       GsSummaryTile *tile2 = GS_SUMMARY_TILE (gtk_bin_get_child (GTK_BIN (child2)));
+       GsApp *app1 = gs_app_tile_get_app (GS_APP_TILE (tile1));
+       GsApp *app2 = gs_app_tile_get_app (GS_APP_TILE (tile2));
+       guint64 release_date1 = 0, release_date2 = 0;
+
+       /* Placeholder tiles have no app. */
+       if (app1 != NULL)
+               release_date1 = gs_app_get_release_date (app1);
+       if (app2 != NULL)
+               release_date2 = gs_app_get_release_date (app2);
+
+       /* Don’t use the normal subtraction trick, as there’s the possibility
+        * for overflow in the conversion from guint64 to gint. */
+       if (release_date1 > release_date2)
+               return -1;
+       else if (release_date2 > release_date1)
+               return 1;
+       else
+               return 0;
+}
+
 static void
 gs_category_page_init (GsCategoryPage *self)
 {
        gtk_widget_init_template (GTK_WIDGET (self));
+
+       /* Sort the recently updated apps by update date. */
+       gtk_flow_box_set_sort_func (GTK_FLOW_BOX (self->recently_updated_flow_box),
+                                   recently_updated_sort_cb,
+                                   NULL,
+                                   NULL);
 }
 
 static void