From 675a2b12a2bfb4e7d1948f68f034d2fb3a7f9424 Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Tue, 6 Mar 2012 21:58:56 +0100
Subject: Added hints to tell the server which track we want next.

This lets the server recode the next track behind the scenes while we're
listening to the current track.
---
 app.py             | 17 +++++++++++++++++
 static/playlist.js |  8 ++++++++
 static/sound.js    |  8 ++++++++
 3 files changed, 33 insertions(+)

diff --git a/app.py b/app.py
index 7d88ebe..6ea7082 100755
--- a/app.py
+++ b/app.py
@@ -38,8 +38,25 @@ class JSONApplication(object):
 		start_response('200 OK', [('Content-Type', 'application/json'), ('Content-Length', str(len(contents)))])
 		return [contents]
 
+	def hint(self, environ, start_response, path):
+		track_id = int(path[1])
+		session = db.Session()
+		try:
+			track = db.Track.get_by_id(session, track_id)
+			cached = self.cache_check(track)
+		finally:
+			session.close()
+
+		if not cached:
+			r = codec.Recoder(track.get_path(), config.get('encoder'), track.file_index, os.path.join(config.get('cache_dir'), str(track.id)))
+			r.recode()
+
+		start_response('200 OK', [('Content-Type', 'application/json')])
+		return [json.dumps({'recoded': not cached})]
+
 	handlers = {
 		'list': list,
+		'hint': hint,
 	}
 
 	def __call__(self, environ, start_response, path):
diff --git a/static/playlist.js b/static/playlist.js
index 6f57075..b94de61 100644
--- a/static/playlist.js
+++ b/static/playlist.js
@@ -39,6 +39,9 @@ $(function(){
 			item.id = this.current_id;
 			this.current_id++;
 			var model = items.create(item);
+			if(items.indexOf(model) < 2) {
+				sound_hint(model);
+			}
 		},
 		addOne: function(item) {
 			var view = new PlaylistItemView({model: item});
@@ -60,6 +63,11 @@ $(function(){
 			items.remove(item);
 			this.render();
 			return next;
+		},
+		hintnext: function() {
+			var next = items.at(1);
+			if(next)
+				sound_hint(next);
 		}
 	});
 
diff --git a/static/sound.js b/static/sound.js
index 874c213..c4f2dbf 100644
--- a/static/sound.js
+++ b/static/sound.js
@@ -1,4 +1,5 @@
 function playsound(model) {
+	playlist.hintnext();
 	var item = model.toJSON();
 	var id = item.track_id;
 	var cid = model.cid;
@@ -51,3 +52,10 @@ function playsound(model) {
 	sound.play();
 	$('#cid-' + cid).addClass('playing');
 }
+
+function sound_hint(model) {
+	$('#cid-' + model.cid).addClass('loading');
+	$.get('/json/hint/' + model.attributes.track_id, function(data) {
+		$('#cid-' + model.cid).removeClass('nocache').removeClass('loading');
+	});
+}
-- 
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