[gnome-software] Count the number of applications when getting the category lists

[Richard Hughes <rhughes src gnome org>]

commit e5cf7f34f5a86d93a44fce1d07fe0fbb9dc1b0ff
Author: Richard Hughes <richard hughsie com>
Date:   Mon Sep 16 10:48:05 2013 +0100

    Count the number of applications when getting the category lists

 src/plugins/gs-plugin-appstream.c |   65 +++++++++++++++++++++++++++++++++++++
 1 files changed, 65 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/gs-plugin-appstream.c b/src/plugins/gs-plugin-appstream.c
index dd99fb6..37e7e7a 100644
--- a/src/plugins/gs-plugin-appstream.c
+++ b/src/plugins/gs-plugin-appstream.c
@@ -498,3 +498,68 @@ gs_plugin_add_search (GsPlugin *plugin,
 out:
        return ret;
 }
+
+/**
+ * gs_plugin_add_categories:
+ */
+gboolean
+gs_plugin_add_categories (GsPlugin *plugin,
+                         GList **list,
+                         GCancellable *cancellable,
+                         GError **error)
+{
+       AppstreamApp *item;
+       const gchar *search_id1;
+       const gchar *search_id2 = NULL;
+       gboolean ret = TRUE;
+       GList *l;
+       GList *l2;
+       GList *children;
+       GPtrArray *array;
+       GsCategory *category;
+       GsCategory *parent;
+       guint i;
+
+       /* load XML files */
+       if (g_once_init_enter (&plugin->priv->done_init)) {
+               ret = gs_plugin_startup (plugin, error);
+               g_once_init_leave (&plugin->priv->done_init, TRUE);
+               if (!ret)
+                       goto out;
+       }
+
+       /* find out how many packages are in each category */
+       for (l = *list; l != NULL; l = l->next) {
+               parent = GS_CATEGORY (l->data);
+               children = gs_category_get_subcategories (parent);
+               for (l2 = children; l2 != NULL; l2 = l2->next) {
+                       category = GS_CATEGORY (l2->data);
+                       search_id1 = gs_category_get_id (category);
+                       search_id2 = gs_category_get_id (parent);
+
+                       /* the "General" item has no ID */
+                       if (search_id1 == NULL) {
+                               search_id1 = search_id2;
+                               search_id2 = NULL;
+                       }
+
+                       /* just look at each app in turn */
+                       array = appstream_cache_get_items (plugin->priv->cache);
+                       for (i = 0; i < array->len; i++) {
+                               item = g_ptr_array_index (array, i);
+                               if (appstream_app_get_id (item) == NULL)
+                                       continue;
+                               if (!appstream_app_has_category (item, search_id1))
+                                       continue;
+                               if (search_id2 != NULL && !appstream_app_has_category (item, search_id2))
+                                       continue;
+
+                               /* we have another result */
+                               gs_category_increment_size (category);
+                               gs_category_increment_size (parent);
+                       }
+               }
+       }
+out:
+       return ret;
+}