ympd/htdocs/js/mpd.js

/* ympd
   (c) 2013-2014 Andrew Karpow <andy@ndyk.de>
   This project's homepage is: http://www.ympd.org
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, Inc.,
   Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

var socket;
var last_state;
var current_app;
var pagination = 0;
var browsepath;
var lastSongTitle = "";
var current_song = new Object();
var MAX_ELEMENTS_PER_PAGE = 512;

var app = $.sammy(function() {

    function runBrowse() {
        current_app = 'queue';

        $('#breadcrump').addClass('hide');
        $('#salamisandwich').find("tr:gt(0)").remove();
        socket.send('MPD_API_GET_QUEUE,'+pagination);

        $('#panel-heading').text("Queue");
        $('#queue').addClass('active');
    }

    function prepare() {
        $('#nav_links > li').removeClass('active');
        $('.page-btn').addClass('hide');
        pagination = 0;
        browsepath = '';
    }

    this.get(/\#\/(\d+)/, function() {
        prepare();
        pagination = parseInt(this.params['splat'][0]);
        runBrowse();
    });

    this.get(/\#\/browse\/(\d+)\/(.*)/, function() {
        prepare();
        browsepath = this.params['splat'][1];
        pagination = parseInt(this.params['splat'][0]);
        current_app = 'browse';
        $('#breadcrump').removeClass('hide').empty().append("<li><a href=\"#/browse/0/\">root</a></li>");
        $('#salamisandwich').find("tr:gt(0)").remove();
        socket.send('MPD_API_GET_BROWSE,'+pagination+','+(browsepath ? browsepath : "/"));

        $('#panel-heading').text("Browse database: "+browsepath);
        var path_array = browsepath.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/0/" + full_path + "\">"+chunk+"</a></li>");
            full_path += "/";
        });
        $('#browse').addClass('active');
    });

    this.get(/\#\/search\/(.*)/, function() {
        current_app = 'search';
        $('#salamisandwich').find("tr:gt(0)").remove();
        var searchstr = this.params['splat'][0];

        $('#search > div > input').val(searchstr);
        socket.send('MPD_API_SEARCH,' + searchstr);

        $('#panel-heading').text("Search: "+searchstr);
    });

    this.get("/", function(context) {
        context.redirect("#/0");
    });
});

$(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());
    } else {
        socket = new WebSocket(get_appropriate_ws_url());
    }

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

            app.run();
        }

        socket.onmessage = function got_packet(msg) {
            if(msg.data === last_state || msg.data.length == 0)
                return;

            var obj = JSON.parse(msg.data);

            switch (obj.type) {
                case "queue":
                    if(current_app !== 'queue')
                        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>");
                    }

                    if(obj.data[obj.data.length-1].id >= pagination + MAX_ELEMENTS_PER_PAGE)
                        $('#next').removeClass('hide');
                    if(pagination > 0)
                        $('#prev').removeClass('hide');

                    $('#salamisandwich > tbody > tr').on({
                        mouseover: function(){
                            if($(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 "search":
                    $('#wait').modal('hide');
                case "browse":
                    if(current_app !== 'browse' && current_app !== 'search')
                        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 "playlist":
                                $('#salamisandwich > tbody').append(
                                    "<tr uri=\"" + obj.data[item].plist + "\" class=\"plist\">" +
                                    "<td><span class=\"glyphicon glyphicon-list\"></span></td>" + 
                                    "<td><a>" + basename(obj.data[item].plist) + "</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 "wrap":
                                if(current_app == 'browse') {
                                    $('#next').removeClass('hide');
                                } else {
                                    $('#salamisandwich > tbody').append(
                                        "<tr><td><span class=\"glyphicon glyphicon-remove\"></span></td>" + 
                                        "<td>Too many results, please refine your search!</td>" + 
                                        "<td></td><td></td></tr>"
                                    );
                                }
                                break;
                        }

                        if(pagination > 0)
                            $('#prev').removeClass('hide');

                    }

                    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($(this), 'MPD_API_ADD_PLAY_TRACK', 'play');
                        },
                        click: function() {
                            switch($(this).attr('class')) {
                                case 'dir':
                                    app.setLocation("#/browse/0/"+$(this).attr("uri"));
                                    break;
                                case 'song':
                                    socket.send("MPD_API_ADD_TRACK," + $(this).attr("uri"));
                                    $('.top-right').notify({
                                        message:{
                                            text: $('td:nth-child(2)', this).text() + " added"
                                        }
                                    }).show();
                                    break;
                                case 'plist':
                                    socket.send("MPD_API_ADD_PLAYLIST," + $(this).attr("uri"));
                                    $('.top-right').notify({
                                        message:{
                                            text: "Playlist " + $('td:nth-child(2)', this).text() + " added"
                                        }
                                    }).show();
                                    break;
                            }
                        },
                        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_queue":
                    if(current_app === 'queue')
                        socket.send('MPD_API_GET_QUEUE,'+pagination);
                    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 "mpdhost":
                    $('#mpdhost').val(obj.data.host);
                    $('#mpdport').val(obj.data.port);
                    if(obj.data.passwort_set)
                        $('#mpd_password_set').removeClass('hide');
                    break;
                case "error":
                    $('.top-right').notify({
                        message:{text: obj.data},
                        type: "danger",
                    }).show();
                default:
                    break;
            }


        }
        socket.onclose = function(){
            console.log("disconnected");
            $('.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 getHost() {
    socket.send('MPD_API_GET_MPDHOST');

    function onEnter(event) {
      if ( event.which == 13 ) {
        confirmSettings();
      }
    }

    $('#mpdhost').keypress(onEnter);
    $('#mpdport').keypress(onEnter);
    $('#mpd_pw').keypress(onEnter);
    $('#mpd_pw_con').keypress(onEnter);
}

$('#search').submit(function () {
    app.setLocation("#/search/"+$('#search > div > input').val());
    $('#wait').modal('show');
    setTimeout(function() {
        $('#wait').modal('hide');
    }, 10000);
    return false;
});

$('.page-btn').on('click', function (e) {

    switch ($(this).text()) {
        case "Next":
            pagination += MAX_ELEMENTS_PER_PAGE;
            break;
        case "Previous":
            pagination -= MAX_ELEMENTS_PER_PAGE;
            if(pagination <= 0)
                pagination = 0;
            break;
    }

    switch(current_app) {
        case "queue":
            app.setLocation('#/'+pagination);
            break;
        case "browse":
            app.setLocation('#/browse/'+pagination+'/'+browsepath);
            break;
    }
    e.preventDefault();
});

function confirmSettings() {
    if($('#mpd_pw').val().length + $('#mpd_pw_con').val().length > 0) {
        if ($('#mpd_pw').val() !== $('#mpd_pw_con').val())
        {
            $('#mpd_pw_con').popover('show');
            setTimeout(function() {
                $('#mpd_pw_con').popover('hide');
            }, 2000);
            return;
        } else
            socket.send('MPD_API_SET_MPDPASS,'+$('#mpd_pw').val());
    }
    socket.send('MPD_API_SET_MPDHOST,'+$('#mpdport').val()+','+$('#mpdhost').val());
    $('#settings').modal('hide');
}

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

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