ympd/htdocs/js/mpd.js

/* libmpdclient
   (c) 2013-2014 Andrew Karpow <andy@ympd.org>
   This project's homepage is: http://www.ympd.org

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

var socket;
var last_state;
var current_app;
var lastSongTitle = "";
var current_song = new Object();

var app = $.sammy(function() {
    this.before('/', function(e, data) {
        $('#nav_links > li').removeClass('active');
    });

    this.get('#/', function() {
        current_app = 'playlist';
        $('#breadcrump').addClass('hide');
        $('#salamisandwich').find("tr:gt(0)").remove();
        $.get( "/api/get_playlist", socket.onmessage);

        $('#panel-heading').text("Playlist");
        $('#playlist').addClass('active');
    });

    this.get(/\#\/browse\/(.*)/, function() {
        current_app = 'browse';
        $('#breadcrump').removeClass('hide').empty().append("<li><a href=\"#/browse/\">root</a></li>");
        $('#salamisandwich').find("tr:gt(0)").remove();
        var path = this.params['splat'][0];

        $.get( "/api/get_browse/" + encodeURIComponent(path), socket.onmessage);

        $('#panel-heading').text("Browse database: "+path+"");
        var path_array = path.split('/');
        var full_path = "";
        $.each(path_array, function(index, chunk) {
            if(path_array.length - 1 == index) {
                $('#breadcrump').append("<li class=\"active\">"+ chunk + "</li>");
                return;
            }

            full_path = full_path + chunk;
            $('#breadcrump').append("<li><a href=\"#/browse/" + full_path + "\">"+chunk+"</a></li>");
            full_path += "/";
        });
        $('#browse').addClass('active');
    });

    this.get("/", function(context) {
        context.redirect("#/");
    });
});

$(document).ready(function(){
    webSocketConnect();
    $("#volumeslider").slider(0);
    $("#volumeslider").on('slider.newValue', function(evt,data){
        socket.send("MPD_API_SET_VOLUME,"+data.val);
    });
    $('#progressbar').slider(0);
    $("#progressbar").on('slider.newValue', function(evt,data){
        if(current_song && current_song.currentSongId >= 0) {
            var seekVal = Math.ceil(current_song.totalTime*(data.val/100));
            socket.send("MPD_API_SET_SEEK,"+current_song.currentSongId+","+seekVal);
        }
    });

    if(!notificationsSupported())
        $('#btnnotify').addClass("disabled");
    else
        if ($.cookie("notification") === "true")
            $('#btnnotify').addClass("active")
});


function webSocketConnect() {
    if (typeof MozWebSocket != "undefined") {
        socket = new MozWebSocket(get_appropriate_ws_url(), "ympd-client");
    } else {
        socket = new WebSocket(get_appropriate_ws_url(), "ympd-client");
    }

    try {
        socket.onopen = function() {
            $('.top-right').notify({
                message:{text:"Connected to ympd"},
                fadeOut: { enabled: true, delay: 500 }
            }).show();

            app.run();
        }

        socket.onmessage =function got_packet(msg) {
            if(msg instanceof MessageEvent) {
                if(msg.data === last_state)
                    return;

                var obj = JSON.parse(msg.data);
            } else {
                var obj = msg;
            }

            switch (obj.type) {
                case "playlist":
                    if(current_app !== 'playlist')
                        break;

                    $('#salamisandwich > tbody').empty();
                    for (var song in obj.data) {
                        var minutes = Math.floor(obj.data[song].duration / 60);
                        var seconds = obj.data[song].duration - minutes * 60;

                        $('#salamisandwich > tbody').append(
                            "<tr trackid=\"" + obj.data[song].id + "\"><td>" + (obj.data[song].pos + 1) + "</td>" +
                                "<td>"+ obj.data[song].title +"</td>" + 
                                "<td>"+ minutes + ":" + (seconds < 10 ? '0' : '') + seconds +
                        "</td><td></td></tr>");
                    }

                    $('#salamisandwich > tbody > tr').on({
                        mouseover: function(){
                            if($(this).children().last().has("a").length == 0)
                                $(this).children().last().append(
                                    "<a class=\"pull-right btn-group-hover\" href=\"#/\" " +
                                        "onclick=\"socket.send('MPD_API_RM_TRACK," + $(this).attr("trackid") +"'); $(this).parents('tr').remove();\">" +
                                "<span class=\"glyphicon glyphicon-trash\"></span></a>")
                            .find('a').fadeTo('fast',1);
                        },
                        click: function() {
                            $('#salamisandwich > tbody > tr').removeClass('active');
                            socket.send('MPD_API_PLAY_TRACK,'+$(this).attr('trackid'));
                            $(this).addClass('active');
                        },
                        mouseleave: function(){
                            $(this).children().last().find("a").stop().remove();
                        }
                    });
                    break;
                case "browse":
                    if(current_app !== 'browse')
                        break;

                    for (var item in obj.data) {
                        switch(obj.data[item].type) {
                            case "directory":
                                $('#salamisandwich > tbody').append(
                                    "<tr uri=\"" + obj.data[item].dir + "\" class=\"dir\">" +
                                        "<td><span class=\"glyphicon glyphicon-folder-open\"></span></td>" + 
                                        "<td><a>" + basename(obj.data[item].dir) + "</a></td>" + 
                                "<td></td><td></td></tr>");
                            break;
                        case "song":
                            var minutes = Math.floor(obj.data[item].duration / 60);
                            var seconds = obj.data[item].duration - minutes * 60;

                            $('#salamisandwich > tbody').append(
                                "<tr uri=\"" + obj.data[item].uri + "\" class=\"song\">" +
                                    "<td><span class=\"glyphicon glyphicon-music\"></span></td>" + 
                                    "<td>" + obj.data[item].title +"</td>" + 
                                    "<td>"+ minutes + ":" + (seconds < 10 ? '0' : '') + seconds +"</td><td></td></tr>");
                                break;

                            case "playlist":
                                break;
                        }
                    }

                    function appendClickableIcon(appendTo, onClickAction, glyphicon) {
                        $(appendTo).children().last().append(
                            "<a role=\"button\" class=\"pull-right btn-group-hover\">" +
                            "<span class=\"glyphicon glyphicon-" + glyphicon + "\"></span></a>")
                            .find('a').click(function(e) {
                                e.stopPropagation();
                                socket.send(onClickAction + "," + $(this).parents("tr").attr("uri"));
                            $('.top-right').notify({
                                message:{
                                    text: $('td:nth-child(2)', $(this).parents("tr")).text() + " added"
                                } }).show();
                            }).fadeTo('fast',1);
                    }

                    $('#salamisandwich > tbody > tr').on({
                        mouseenter: function() {
                            if($(this).is(".dir")) 
                                appendClickableIcon($(this), 'MPD_API_ADD_TRACK', 'plus');
                            else if($(this).is(".song"))
                                appendClickableIcon($(this), 'MPD_API_ADD_PLAY_TRACK', 'play');
                        },
                        click: function() {
                            if($(this).is(".song")) {
                                socket.send("MPD_API_ADD_TRACK," + $(this).attr("uri"));
                                $('.top-right').notify({
                                    message:{
                                        text: $('td:nth-child(2)', this).text() + " added"
                                    }
                                }).show();

                            } else
                                app.setLocation("#/browse/"+$(this).attr("uri"));
                        },
                        mouseleave: function(){
                            $(this).children().last().find("a").stop().remove();
                        }
                    });

                    break;
                case "state":
                    updatePlayIcon(obj.data.state);
                    updateVolumeIcon(obj.data.volume);

                    if(JSON.stringify(obj) === JSON.stringify(last_state))
                        break;

                    current_song.totalTime  = obj.data.totalTime;
                    current_song.currentSongId = obj.data.currentsongid;
                    var total_minutes = Math.floor(obj.data.totalTime / 60);
                    var total_seconds = obj.data.totalTime - total_minutes * 60;

                    var elapsed_minutes = Math.floor(obj.data.elapsedTime / 60);
                    var elapsed_seconds = obj.data.elapsedTime - elapsed_minutes * 60;

                    $('#volumeslider').slider(obj.data.volume);
                    var progress = Math.floor(100*obj.data.elapsedTime/obj.data.totalTime);
                    $('#progressbar').slider(progress);

                    $('#counter')
                    .text(elapsed_minutes + ":" + 
                        (elapsed_seconds < 10 ? '0' : '') + elapsed_seconds + " / " +
                        total_minutes + ":" + (total_seconds < 10 ? '0' : '') + total_seconds);

                    $('#salamisandwich > tbody > tr').removeClass('active').css("font-weight", "");
                    $('#salamisandwich > tbody > tr[trackid='+obj.data.currentsongid+']').addClass('active').css("font-weight", "bold");

                    if(obj.data.random)
                        $('#btnrandom').addClass("active")
                    else
                        $('#btnrandom').removeClass("active");

                    if(obj.data.consume)
                        $('#btnconsume').addClass("active")
                    else
                        $('#btnconsume').removeClass("active");

                    if(obj.data.single)
                        $('#btnsingle').addClass("active")
                    else
                        $('#btnsingle').removeClass("active");

                    if(obj.data.repeat)
                        $('#btnrepeat').addClass("active")
                    else
                        $('#btnrepeat').removeClass("active");

                    last_state = obj;
                    break;
                case "disconnected":
                    if($('.top-right').has('div').length == 0)
                        $('.top-right').notify({
                            message:{text:"ympd lost connection to MPD "},
                            type: "danger",
                            fadeOut: { enabled: true, delay: 1000 },
                        }).show();
                    break;
                case "update_playlist":
                    if(current_app === 'playlist')
                        $.get( "/api/get_playlist", socket.onmessage);
                    break;
                case "song_change":
                    $('#currenttrack').text(" " + obj.data.title);
                    var notification = "<strong><h4>" + obj.data.title + "</h4></strong>";

                    if(obj.data.album) {
                        $('#album').text(obj.data.album);
                        notification += obj.data.album + "<br />";
                    }
                    if(obj.data.artist) {
                        $('#artist').text(obj.data.artist);
                        notification += obj.data.artist + "<br />";
                    }

                    if ($.cookie("notification") === "true")
                        songNotify(obj.data.title, obj.data.artist + " " + obj.data.album );
                    else
                        $('.top-right').notify({
                            message:{html: notification},
                            type: "info",
                        }).show();
                        
                    break;
                case "error":
                    $('.top-right').notify({
                        message:{text: obj.data},
                        type: "danger",
                    }).show();
                default:
                    break;
            }


        }
        socket.onclose = function(){
            $('.top-right').notify({
                message:{text:"Connection to ympd lost, retrying in 3 seconds "},
                type: "danger", 
                onClose: function () {
                    webSocketConnect();
                }
            }).show();
        }

    } catch(exception) {
        alert('<p>Error' + exception);
    }

}

function get_appropriate_ws_url()
{
    var pcol;
    var u = document.URL;

    /*
    /* We open the websocket encrypted if this page came on an
    /* https:// url itself, otherwise unencrypted
    /*/

    if (u.substring(0, 5) == "https") {
        pcol = "wss://";
        u = u.substr(8);
    } else {
        pcol = "ws://";
        if (u.substring(0, 4) == "http")
            u = u.substr(7);
    }

    u = u.split('/');

    return pcol + u[0];
}

var updateVolumeIcon = function(volume)
{
    $("#volume-icon").removeClass("glyphicon-volume-off");
    $("#volume-icon").removeClass("glyphicon-volume-up");
    $("#volume-icon").removeClass("glyphicon-volume-down");

    if(volume == 0) {
        $("#volume-icon").addClass("glyphicon-volume-off");
    } else if (volume < 50) {
        $("#volume-icon").addClass("glyphicon-volume-down");
    } else {
        $("#volume-icon").addClass("glyphicon-volume-up");
    }
}

var updatePlayIcon = function(state)
{
    $("#play-icon").removeClass("glyphicon-play")
    .removeClass("glyphicon-pause");
    $('#track-icon').removeClass("glyphicon-play")
    .removeClass("glyphicon-pause")
    .removeClass("glyphicon-stop");

    if(state == 1) { // stop
        $("#play-icon").addClass("glyphicon-play");
        $('#track-icon').addClass("glyphicon-stop");
    } else if(state == 2) { // pause
        $("#play-icon").addClass("glyphicon-pause");
        $('#track-icon').addClass("glyphicon-play");
    } else { // play
        $("#play-icon").addClass("glyphicon-play");
        $('#track-icon').addClass("glyphicon-pause");
    }
}

function updateDB() {
    socket.send('MPD_API_UPDATE_DB');
    $('.top-right').notify({
        message:{text:"Updating MPD Database... "}
    }).show();
}

function clickPlay() {
    if($('#track-icon').hasClass('glyphicon-stop'))
        socket.send('MPD_API_SET_PLAY');
    else
        socket.send('MPD_API_SET_PAUSE');
}

function basename(path) {
    return path.split('/').reverse()[0];
}

$('#btnrandom').on('click', function (e) {
    socket.send("MPD_API_TOGGLE_RANDOM," + ($(this).hasClass('active') ? 0 : 1));

});
$('#btnconsume').on('click', function (e) {
    socket.send("MPD_API_TOGGLE_CONSUME," + ($(this).hasClass('active') ? 0 : 1));

});
$('#btnsingle').on('click', function (e) {
    socket.send("MPD_API_TOGGLE_SINGLE," + ($(this).hasClass('active') ? 0 : 1));
});
$('#btnrepeat').on('click', function (e) {
    socket.send("MPD_API_TOGGLE_REPEAT," + ($(this).hasClass('active') ? 0 : 1));
});

$('#btnnotify').on('click', function (e) {
    if($.cookie("notification") === "true")
        $.cookie("notification", false);
    else {
        window.webkitNotifications.requestPermission();
        if (window.webkitNotifications.checkPermission() == 0)
        {
            $.cookie("notification", true);
            $('btnnotify').addClass("active");
        }
    }
});

function getVersion()
{
    $.get( "/api/get_version", function(response) {
        $('#ympd_version').text(response.data.ympd_version);
        $('#mpd_version').text(response.data.mpd_version);
    });
}

function notificationsSupported() {
    return "webkitNotifications" in window;
}

function songNotify(artist, title) {
    if (!notificationsSupported())
	   return;

    if (window.webkitNotifications.checkPermission() == 0) {
	   var notification = window.webkitNotifications.createNotification("assets/favicon.ico", artist, title);
	   notification.show();
	   setTimeout(function(notification) {
		  notification.cancel();
	   }, 3000, notification);
    } else {
	   window.webkitNotifications.requestPermission();
    }
}