Add as_app_has_category()

It's used in GNOME Software and now createrepo_as, so move it here.

3 files changed, 31 insertions, 0 deletions

diff --git a/libappstream-glib/as-app.c b/libappstream-glib/as-app.c
index 477249d..011ef37 100644
--- a/libappstream-glib/as-app.c
+++ b/libappstream-glib/as-app.c
@@ -241,6 +241,33 @@ as_app_get_categories (AsApp *app)
 }
 
 /**
+ * as_app_has_category:
+ * @app: a #AsApp instance.
+ * @category: a category string, e.g. "DesktopSettings"
+ *
+ * Searches the category list for a specific item.
+ *
+ * Returns: %TRUE if the application has got the specified category
+ *
+ * Since: 0.1.5
+ */
+gboolean
+as_app_has_category (AsApp *app, const gchar *category)
+{
+	GPtrArray *categories;
+	const gchar *tmp;
+	guint i;
+
+	categories = as_app_get_categories (app);
+	for (i = 0; i < categories->len; i++) {
+		tmp = g_ptr_array_index (categories, i);
+		if (g_strcmp0 (tmp, category) == 0)
+			return TRUE;
+	}
+	return FALSE;
+}
+
+/**
  * as_app_get_compulsory_for_desktops:
  * @app: a #AsApp instance.
  *
diff --git a/libappstream-glib/as-app.h b/libappstream-glib/as-app.h
index dcbb2a3..a0bcabd 100644
--- a/libappstream-glib/as-app.h
+++ b/libappstream-glib/as-app.h
@@ -183,6 +183,8 @@ const gchar	*as_app_get_metadata_item	(AsApp		*app,
 						 const gchar	*key);
 const gchar	*as_app_get_url_item		(AsApp		*app,
 						 AsUrlKind	 url_kind);
+gboolean	 as_app_has_category		(AsApp		*app,
+						 const gchar	*category);
 
 /* setters */
 void		 as_app_set_id_full		(AsApp		*app,
diff --git a/libappstream-glib/as-self-test.c b/libappstream-glib/as-self-test.c
index de22618..5c60088 100644
--- a/libappstream-glib/as-self-test.c
+++ b/libappstream-glib/as-self-test.c
@@ -579,6 +579,8 @@ ch_test_app_parse_file_func (void)
 	g_assert_cmpstr (as_app_get_metadata_item (app, "NoDisplay"), ==, "");
 	g_assert_cmpstr (as_app_get_project_group (app), ==, NULL);
 	g_assert_cmpint (as_app_get_categories(app)->len, ==, 1);
+	g_assert (as_app_has_category (app, "System"));
+	g_assert (!as_app_has_category (app, "NotGoingToExist"));
 
 	/* reparse with heuristics */
 	ret = as_app_parse_file (app,