[rygel] server: Move code for Samsung subtitles

[Jens Georg <jensgeorg src gnome org>]

commit 705bb8aa678df004a265e2da2fe85f6930d6e6ca
Author: Jens Georg <mail jensge org>
Date:   Thu Nov 20 07:59:51 2014 +0100

    server: Move code for Samsung subtitles
    
    Move it to Samsung hacks class.
    
    Signed-off-by: Jens Georg <mail jensge org>

 src/librygel-server/rygel-client-hacks.vala     |    2 ++
 src/librygel-server/rygel-http-get-handler.vala |   17 ++++-------------
 src/librygel-server/rygel-samsung-tv-hacks.vala |   16 ++++++++++++++++
 3 files changed, 22 insertions(+), 13 deletions(-)
---
diff --git a/src/librygel-server/rygel-client-hacks.vala b/src/librygel-server/rygel-client-hacks.vala
index 8bb9927..32a9013 100644
--- a/src/librygel-server/rygel-client-hacks.vala
+++ b/src/librygel-server/rygel-client-hacks.vala
@@ -95,6 +95,8 @@ internal abstract class Rygel.ClientHacks : GLib.Object {
 
     public virtual bool force_seek () { return false; }
 
+    public virtual void modify_headers (HTTPRequest request) {}
+
     public virtual async MediaObjects? search
                                         (SearchableContainer container,
                                          SearchExpression?   expression,
diff --git a/src/librygel-server/rygel-http-get-handler.vala b/src/librygel-server/rygel-http-get-handler.vala
index 83f77da..48638ec 100644
--- a/src/librygel-server/rygel-http-get-handler.vala
+++ b/src/librygel-server/rygel-http-get-handler.vala
@@ -62,19 +62,10 @@ internal abstract class Rygel.HTTPGetHandler: GLib.Object {
                        "failed to provide the value in response headers");
         }
 
-        // Handle Samsung DLNA TV proprietary subtitle headers
-        if (request.msg.request_headers.get_one ("getCaptionInfo.sec") != null
-            && (request.object is VideoItem)
-            && (request.object as VideoItem).subtitles.size > 0) {
-                var caption_uri = request.http_server.create_uri_for_item
-                                        (request.object as MediaItem,
-                                         -1,
-                                         0, // FIXME: offer first subtitle only?
-                                         null,
-                                         null);
-
-                request.msg.response_headers.append ("CaptionInfo.sec",
-                                                     caption_uri);
+        // Handle device-specific hacks that need to change the response
+        // headers such as Samsung's subtitle stuff.
+        if (request.hack != null) {
+            request.hack.modify_headers (request);
         }
 
         request.msg.response_headers.append ("Connection", "close");
diff --git a/src/librygel-server/rygel-samsung-tv-hacks.vala b/src/librygel-server/rygel-samsung-tv-hacks.vala
index 83ea363..e6a35fc 100644
--- a/src/librygel-server/rygel-samsung-tv-hacks.vala
+++ b/src/librygel-server/rygel-samsung-tv-hacks.vala
@@ -52,4 +52,20 @@ internal class Rygel.SamsungTVHacks : ClientHacks {
     public override bool force_seek () {
         return true;
     }
+
+    public override void modify_headers (HTTPRequest request) {
+        if (request.msg.request_headers.get_one ("getCaptionInfo.sec") != null
+            && (request.object is VideoItem)
+            && (request.object as VideoItem).subtitles.size > 0) {
+                var caption_uri = request.http_server.create_uri_for_item
+                                        (request.object as MediaItem,
+                                         -1,
+                                         0, // FIXME: offer first subtitle only?
+                                         null,
+                                         null);
+
+                request.msg.response_headers.append ("CaptionInfo.sec",
+                                                     caption_uri);
+        }
+    }
 }