From 1f3f1443259937eb08de6c001791b28514ba67d9 Mon Sep 17 00:00:00 2001
From: Michael Wittig <michael.wittig@fu-berlin.de>
Date: Thu, 14 Oct 2010 14:35:37 +0200
Subject: search_best

---
 server/media.erl | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

(limited to 'server')

diff --git a/server/media.erl b/server/media.erl
index fb1d951..8921724 100644
--- a/server/media.erl
+++ b/server/media.erl
@@ -19,7 +19,7 @@
 init() ->
     mnesia:create_schema([node()]),
     mnesia:start(),
-    mnesia:create_table(track, [{index, [y]}, {attributes, record_info(fields, track)}]),
+    mnesia:create_table(track, [{attributes, record_info(fields, track)}]),
     read_files(filelib:wildcard(?TESTPATTERN),0,0),
     io:format("Initialisation of mnesia successful.\n"),
     start_playing().
@@ -52,13 +52,14 @@ insert(Artist, Title, Filepath) ->
 
 % search the track with the highest votes and return {Artist, Title}
 
-search_best(_,_,_) -> {"Allison Crowe", "Northern Lights"}.
-%search_best([Head|Rest], Max_Votes, Track) -> 
-%	if (Max_Votes <  Head#track.votes) and (Head#track.locked == 0) ->
-%		search_best(Rest, Head#track.votes, Head);
-%	true -> search_best(Rest, Max_Votes, Track)
-%	end;
-%search_best([], _, Track) -> {Track#track.Artist, Track#track.Title}.
+%search_best(_,_,_) -> {"Allison Crowe", "Northern Lights"}.
+search_best([Head|Rest], Max_Votes, Track) -> 
+	if 
+	((Max_Votes =<  Head#track.votes) and (Head#track.locked == false)) ->
+		search_best(Rest, Head#track.votes, Head);
+	true -> search_best(Rest, Max_Votes, Track)
+	end;
+search_best([], _, Track) -> {Track#track.artist, Track#track.title}.
 
 
 % We want to query in order to simplify the next calls.
@@ -86,7 +87,15 @@ play(Artist, Title, Callback) ->
     [Head|_] = ask(Artist, Title),
     {_, Title, Artist, _, _, Fp} = Head,
     Port = erlang:open_port({spawn_executable, "/usr/bin/mplayer"}, [{args, [Fp]}, exit_status]),
-    io:format("playing: ~w, Artist: ~w~n", [Title, Artist]),
+
+    % lock the song
+    F = fun() ->
+                New = Head#track{locked = 1},
+                mnesia:write(New)
+        end,
+    mnesia:transaction(F),
+
+    io:format("playing: ~s, Artist: ~s~n", [Title, Artist]),
     receive
 		{Port, {exit_status, 0}} -> start_playing();
 		{Port, {exit_status, S}} -> throw({commandfailed, S})
-- 
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