[gnome-games/wip/exalm/desktop-in-flatpak: 61/64] desktop: Add DesktopTrackerAppInfo

[Alexander Mikhaylenko <alexm src gnome org>]

commit c8a316b5b5fc9febdcf21215bcf1bd870b68f0b0
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Thu Aug 9 20:05:02 2018 +0500

    desktop: Add DesktopTrackerAppInfo
    
    This will allow to get desktop app metadata via tracker exclusively.

 plugins/desktop/src/desktop-tracker-app-info.vala | 67 +++++++++++++++++++++++
 plugins/desktop/src/meson.build                   |  1 +
 2 files changed, 68 insertions(+)
---
diff --git a/plugins/desktop/src/desktop-tracker-app-info.vala 
b/plugins/desktop/src/desktop-tracker-app-info.vala
new file mode 100644
index 00000000..d6702a36
--- /dev/null
+++ b/plugins/desktop/src/desktop-tracker-app-info.vala
@@ -0,0 +1,67 @@
+// This file is part of GNOME Games. License: GPL-3.0+.
+
+private class Games.DesktopTrackerAppInfo : Object {
+       private const string TRACKER_KEY_PREFIX_NFO = 
"http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#";;
+       private const string TRACKER_KEY_PREFIX_NIE = 
"http://www.semanticdesktop.org/ontologies/2007/01/19/nie#";;
+       private const string TRACKER_KEY_CMDLINE = TRACKER_KEY_PREFIX_NFO + "softwareCmdLine";
+       private const string TRACKER_KEY_ICON = TRACKER_KEY_PREFIX_NFO + "softwareIcon";
+       private const string TRACKER_KEY_TITLE = TRACKER_KEY_PREFIX_NIE + "title";
+       private const string TRACKER_KEY_FILE_NAME = TRACKER_KEY_PREFIX_NFO + "fileName";
+       private const string TRACKER_KEY_CATEGORY = TRACKER_KEY_PREFIX_NIE + "isLogicalPartOf";
+
+       private TrackerMetadata metadata;
+
+       public DesktopTrackerAppInfo (Uri uri) throws Error {
+               var connection = Tracker.Sparql.Connection.@get ();
+               metadata = new TrackerMetadata (connection, uri);
+       }
+
+       public GLib.Icon? get_icon () {
+               var val = metadata.get_object (TRACKER_KEY_ICON);
+               var icon = val.replace ("urn:theme-icon:", "");
+
+               try {
+                       return GLib.Icon.new_for_string (icon);
+               } catch (Error e) {
+                       debug (e.message);
+                       return null;
+               }
+       }
+
+       public string get_title () {
+               return metadata.get_object (TRACKER_KEY_TITLE);
+       }
+
+       public string get_filename () {
+               return metadata.get_object (TRACKER_KEY_FILE_NAME);
+       }
+
+       public string get_command () {
+               return metadata.get_object (TRACKER_KEY_CMDLINE);
+       }
+
+       public string[] get_categories () {
+               var categories = metadata.get_all_objects (TRACKER_KEY_CATEGORY);
+               string[] result = {};
+               foreach (var category in categories)
+                       result += category.replace ("urn:software-category:", "");
+
+               return result;
+       }
+
+       public string get_executable () {
+               var cmdline = get_command ();
+               var args = cmdline.split(" ");
+
+               // FIXME
+               if (args[0].has_suffix ("flatpak")) {
+                       var index = 1;
+                       while (args[index].has_prefix ("-"))
+                               index++;
+
+                       return args[index];
+               }
+
+               return args[0];
+       }
+}
diff --git a/plugins/desktop/src/meson.build b/plugins/desktop/src/meson.build
index e139521e..0738dc78 100644
--- a/plugins/desktop/src/meson.build
+++ b/plugins/desktop/src/meson.build
@@ -3,6 +3,7 @@ vala_sources = [
   'desktop-icon.vala',
   'desktop-plugin.vala',
   'desktop-title.vala',
+  'desktop-tracker-app-info.vala',
   'desktop-tracker-uri-query.vala',
   'desktop-uid.vala',
 ]