[gnome-games/wip/exalm/rebrand: 49/102] Introduce GameParser

[Alexander Mikhaylenko <alexm src gnome org>]

commit 8ba3e4a84e9110c606e6584dc8cc72c5b14b4068
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Tue Mar 30 01:51:04 2021 +0500

    Introduce GameParser

 src/core/game-parser.vala                    | 25 +++++++++++++++++++++++++
 src/core/platform.vala                       |  1 +
 src/meson.build                              |  1 +
 src/retro/retro-simple-game-uri-adapter.vala | 13 ++++++++++---
 4 files changed, 37 insertions(+), 3 deletions(-)
---
diff --git a/src/core/game-parser.vala b/src/core/game-parser.vala
new file mode 100644
index 00000000..ccf903d0
--- /dev/null
+++ b/src/core/game-parser.vala
@@ -0,0 +1,25 @@
+// This file is part of GNOME Games. License: GPL-3.0+.
+
+public class Games.GameParser : Object {
+       public Platform platform { get; construct; }
+       public Uri uri { get; construct; }
+
+       public GameParser (Platform platform, Uri uri) {
+               Object (platform: platform, uri: uri);
+       }
+
+       public virtual void parse () throws Error {
+       }
+
+       public virtual string get_uid () throws Error {
+               return Fingerprint.get_uid (uri, platform.get_uid_prefix ());
+       }
+
+       public virtual Title get_title () {
+               return new FilenameTitle (uri);
+       }
+
+       public virtual Icon? get_icon () {
+               return null;
+       }
+}
diff --git a/src/core/platform.vala b/src/core/platform.vala
index fe3ffe0a..e05ff158 100644
--- a/src/core/platform.vala
+++ b/src/core/platform.vala
@@ -10,6 +10,7 @@ public class Games.Platform : Object {
        public bool autodiscovery { get; set; }
        public Type snapshot_type { get; set; default = typeof (Snapshot); }
        public Type runner_type { get; set; default = typeof (Runner); }
+       public Type parser_type { get; set; default = typeof (GameParser); }
 
        public Platform (string id, string name,  string mime_type, string prefix) {
                this.id = id;
diff --git a/src/meson.build b/src/meson.build
index 657128aa..0ba31d38 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -29,6 +29,7 @@ vala_sources = [
   'core/game-callback.vala',
   'core/game-collection.vala',
   'core/game-model.vala',
+  'core/game-parser.vala',
   'core/game-uri-adapter.vala',
   'core/icon.vala',
   'core/input-capabilities.vala',
diff --git a/src/retro/retro-simple-game-uri-adapter.vala b/src/retro/retro-simple-game-uri-adapter.vala
index 05acad84..4bb45662 100644
--- a/src/retro/retro-simple-game-uri-adapter.vala
+++ b/src/retro/retro-simple-game-uri-adapter.vala
@@ -1,6 +1,6 @@
 // This file is part of GNOME Games. License: GPL-3.0+.
 
-private class Games.RetroSimpleGameUriAdapter : GameUriAdapter, Object {
+public class Games.RetroSimpleGameUriAdapter : GameUriAdapter, Object {
        private Platform platform;
 
        public RetroSimpleGameUriAdapter (Platform platform) {
@@ -8,15 +8,22 @@ private class Games.RetroSimpleGameUriAdapter : GameUriAdapter, Object {
        }
 
        public Game game_for_uri (Uri uri) throws Error {
-               var uid = new Uid (Fingerprint.get_uid (uri, platform.get_uid_prefix ()));
-               var title = new FilenameTitle (uri);
+               var parser = Object.new (platform.parser_type, platform: platform, uri: uri) as GameParser;
+
+               parser.parse ();
+
+               var uid = new Uid (parser.get_uid ());
+               var title = parser.get_title ();
                var media = new GriloMedia (title, platform.get_presentation_mime_type ());
                var cover = new CompositeCover ({
                        new LocalCover (uri),
                        new GriloCover (media, uid)});
+               var icon = parser.get_icon ();
 
                var game = new Game (uid, uri, title, platform);
                game.set_cover (cover);
+               if (icon != null)
+                       game.set_icon (icon);
 
                return game;
        }