[gnome-games] core: Add MediaInfo

[Adrien Plazas <aplazas src gnome org>]

commit 2b8e749f650d7694fb220744604b3bd8eb987411
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Wed May 31 14:57:12 2017 +0200

    core: Add MediaInfo
    
    This will be used to extract information on a game media from an URI.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783319

 src/Makefile.am          |    1 +
 src/core/media-info.vala |   43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index d769481..a49476d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -49,6 +49,7 @@ gnome_games_SOURCES = \
        core/icon.vala \
        core/input-capabilities.vala \
        core/media.vala \
+       core/media-info.vala \
        core/media-set/media-set.vala \
        core/media-set/media-set-error.vala \
        core/plugin.vala \
diff --git a/src/core/media-info.vala b/src/core/media-info.vala
new file mode 100644
index 0000000..3c5ab93
--- /dev/null
+++ b/src/core/media-info.vala
@@ -0,0 +1,43 @@
+// This file is part of GNOME Games. License: GPL-3.0+.
+
+public class Games.MediaInfo : Object {
+       public string platform { get; private set; }
+       public string game_id { get; private set; }
+       public string? media_id { get; private set; }
+       public uint media_index { get; private set; }
+
+       public MediaInfo (string platform, string game_id, string? media_id, uint media_index) {
+               this.platform = platform;
+               this.game_id = game_id;
+               this.media_id = media_id;
+               this.media_index = media_index;
+       }
+
+       public static uint game_hash (MediaInfo media_info) {
+               return str_hash (media_info.platform) +
+                      str_hash (media_info.game_id);
+       }
+
+       public static bool game_equal (MediaInfo a, MediaInfo b) {
+               return str_equal (a.platform, b.platform) &
+                      str_equal (a.game_id, b.game_id);
+       }
+
+       public static uint media_hash (MediaInfo media_info) {
+               return str_hash (media_info.platform) +
+                      str_hash (media_info.game_id) +
+                      str_hash (media_info.media_id);
+       }
+
+       public static bool media_equal (MediaInfo a, MediaInfo b) {
+               return str_equal (a.platform, b.platform) &
+                      str_equal (a.game_id, b.game_id) &
+                      str_equal (a.media_id, b.media_id);
+       }
+
+       public string to_string () {
+               return media_id == null ?
+                       @"urn:gnome:Games:$platform:$game_id:" :
+                       @"urn:gnome:Games:$platform:$game_id:$media_id";
+       }
+}