[gnome-builder] project-info: add compare helper

[Christian Hergert <chergert src gnome org>]

commit 92944b65994b9175ef1b2fca8215d702ca22daf1
Author: Christian Hergert <christian hergert me>
Date:   Wed Apr 22 14:50:08 2015 -0700

    project-info: add compare helper
    
    This adds ide_project_info_compare() to IdeProjectInfo so that it can
    be reused in various places.

 libide/ide-project-info.c |   47 ++++++++++++++++++++++++++++++++++++++++++++-
 libide/ide-project-info.h |    2 +
 2 files changed, 48 insertions(+), 1 deletions(-)
---
diff --git a/libide/ide-project-info.c b/libide/ide-project-info.c
index 2edfe59..dfd6d69 100644
--- a/libide/ide-project-info.c
+++ b/libide/ide-project-info.c
@@ -16,9 +16,14 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
+
 #define G_LOG_DOMAIN "ide-project-info"
 
 #include <glib/gi18n.h>
+#include <string.h>
 
 #include "ide-project-info.h"
 
@@ -33,7 +38,7 @@
 
 struct _IdeProjectInfo
 {
-  GObject  parent_instance;
+  GObject    parent_instance;
 
   GDateTime *last_modified_at;
   GFile     *directory;
@@ -324,3 +329,43 @@ static void
 ide_project_info_init (IdeProjectInfo *self)
 {
 }
+
+gint
+ide_project_info_compare (IdeProjectInfo *info1,
+                          IdeProjectInfo *info2)
+{
+  const gchar *name1;
+  const gchar *name2;
+  GDateTime *dt1;
+  GDateTime *dt2;
+  gint ret;
+  gint prio1;
+  gint prio2;
+
+  g_assert (IDE_IS_PROJECT_INFO (info1));
+  g_assert (IDE_IS_PROJECT_INFO (info2));
+
+  prio1 = ide_project_info_get_priority (info1);
+  prio2 = ide_project_info_get_priority (info2);
+
+  if (prio1 != prio2)
+    return prio1 - prio2;
+
+  dt1 = ide_project_info_get_last_modified_at (info1);
+  dt2 = ide_project_info_get_last_modified_at (info2);
+
+  ret = g_date_time_compare (dt2, dt1);
+
+  if (ret != 0)
+    return ret;
+
+  name1 = ide_project_info_get_name (info1);
+  name2 = ide_project_info_get_name (info2);
+
+  if (name1 == NULL)
+    return 1;
+  else if (name2 == NULL)
+    return -1;
+  else
+    return strcasecmp (name1, name2);
+}
diff --git a/libide/ide-project-info.h b/libide/ide-project-info.h
index a547d71..9616474 100644
--- a/libide/ide-project-info.h
+++ b/libide/ide-project-info.h
@@ -27,6 +27,8 @@ G_BEGIN_DECLS
 
 G_DECLARE_FINAL_TYPE (IdeProjectInfo, ide_project_info, IDE, PROJECT_INFO, GObject)
 
+gint         ide_project_info_compare              (IdeProjectInfo *info1,
+                                                    IdeProjectInfo *info2);
 GFile       *ide_project_info_get_file             (IdeProjectInfo *self);
 GFile       *ide_project_info_get_directory        (IdeProjectInfo *self);
 gint         ide_project_info_get_priority         (IdeProjectInfo *self);