Asunder/src/webserver/dacp.js

   1 function Node(text) {
   2
   3         var parseNum = function (index, len) {
   4                 if (len > 4) return parseBigNum(index, len);
   5
   6                 var num = text.charCodeAt(index) & 255;
   7                 for (var i = 1; i < len; i++) {
   8                         num = num * 256;
   9                         num += text.charCodeAt(index + i) & 255;
  10                 }
  11                 return num;
  12         };
  13
  14         var parseBigNum = function (index, len) {
  15                 var num = new BigNumber(text.charCodeAt(index) & 255);
  16                 for (var i = 1; i < len; i++) {
  17                         num = num.multiply(256);
  18                         num = num.add(text.charCodeAt(index + i) & 255);
  19                 }
  20                 return num;
  21         };
  22
  23         this.name = function (index) {
  24                 return text.substring(index, index+4);
  25         };
  26         this.length = function (index) {
  27                 return parseNum(index+4, 4);
  28         };
  29         this.byteVal = function (index) {
  30                 return parseNum(index+8, 1);
  31         };
  32         this.shortVal = function (index) {
  33                 return parseNum(index+8, 2);
  34         };
  35         this.intVal = function (index) {
  36                 return parseNum(index+8, 4);
  37         };
  38         this.longVal = function (index) {
  39                 return parseNum(index+8, 8);
  40         };
  41         this.longlongVal = function (index) {
  42                 return {
  43                         0:      parseNum(index+8, 4),
  44                         1:      parseNum(index+12, 4),
  45                         2:      parseNum(index+16, 4),
  46                         3:      parseNum(index+20, 4)
  47                 };
  48         };
  49         this.stringVal = function (index) {
  50                 var length = this.length(index);
  51                 var string = "";
  52                 for ( var i = 8; i < 8+length;) {
  53                         var c = text.charCodeAt(index + i) & 255;
  54                         var c2,c3;
  55                         if (c < 128) {
  56                                 string += String.fromCharCode(c);
  57                                 i++;
  58                         } else if (c > 191 && c < 224) {
  59                                 c2 = text.charCodeAt(index + i + 1) & 255;
  60                                 string += String.fromCharCode(((c & 31)) << 6 | (c2 & 63));
  61                                 i += 2;
  62                         } else {
  63                                 c2 = text.charCodeAt(index + i + 1) & 255;
  64                                 c3 = text.charCodeAt(index + i + 2) & 255;
  65                                 string += String.fromCharCode(((c & 15)) << 12 | (c2 & 63) << 6
  66                                                 | (c3 & 63));
  67                                 i += 3;
  68                         }
  69                 }
  70                 return string;
  71         };
  72         this.dateVal = function (index) {
  73                 return parseNum(index+8, 8);
  74         };
  75         this.versionVal = function (index) {
  76                 var version = text.charCodeAt(index+8) & 255;
  77                 for (i in 1, 2, 3) {
  78                         version += ".";
  79                         version += text.charCodeAt(index+8 + i) & 255;
  80                 }
  81                 return version;
  82         };
  83         this.children = function (index) {
  84                 var kids = new Array();
  85                 var len = index + 8 + this.length(index);
  86                 var i = index+8;
  87                 while (i < len) {
  88                         kids.push(i);
  89                         i += 8 + this.length(i);
  90                 }
  91                 return kids;
  92         };
  93 }
  94
  95 function PlayStatusUpdate(tree, index) {
  96
  97         var kids = tree.children(index);
  98
  99         this.album = "";
 100         this.title = "";
 101         this.artist = "";
 102         this.genre = "";
 103         this.id = 0;
 104         this.status = 0;
 105         this.revision = 0;
 106         this.container = 0;
 107
 108         for (child in kids) {
 109                 var node = kids[child];
 110                 switch (tree.name(node)) {
 111                 case "caps":
 112                         this.status = tree.byteVal(node);
 113                         break;
 114                 case "cmsr":
 115                         this.revision = tree.intVal(node);
 116                         break;
 117                 case "cann":
 118                         this.title = tree.stringVal(node);
 119                         break;
 120                 case "cana":
 121                         this.artist = tree.stringVal(node);
 122                         break;
 123                 case "canl":
 124                         this.album = tree.stringVal(node);
 125                         break;
 126                 case "cang":
 127                         this.genre = tree.stringVal(node);
 128                         break;
 129                 case "canp":
 130                         this.container = tree.longlongVal(node)[1];
 131                         this.id = tree.longlongVal(node)[3];
 132                         break;
 133                 }
 134         }
 135 }
 136
 137 function findNode(tree, index, tag) {
 138         var kids = tree.children(index);
 139         for (child in kids) {
 140                 if (tree.name(kids[child]) == tag) {
 141                         return kids[child];
 142                 }
 143         }
 144         return 0;
 145 }
 146
 147 function getItems(tree, index, handler) {
 148
 149         var items = new Array();
 150
 151         var kids = tree.children(index);
 152         for (child in kids) {
 153                 items.push(handler(tree, kids[child]));
 154         }
 155
 156         return items;
 157 }
 158
 159 function Container(tree, index) {
 160
 161         this.id = 0;
 162         this.persistent = 0;
 163         this.name = "";
 164         this.base = false;
 165         this.parent = 0;
 166         this.items = 0;
 167
 168         var kids = tree.children(index);
 169         for (child in kids) {
 170                 var node = kids[child];
 171                 switch (tree.name(node)) {
 172                 case "miid":
 173                         this.id = tree.intVal(node);
 174                         break;
 175                 case "mper":
 176                         this.persistent = tree.longVal(node);
 177                         break;
 178                 case "minm":
 179                         this.name = tree.stringVal(node);
 180                         break;
 181                 case "abpl":
 182                         this.base = tree.byteVal(node);
 183                         break;
 184                 case "mpco":
 185                         this.parent = tree.intVal(node);
 186                         break;
 187                 case "mimc":
 188                         this.items = tree.intVal(node);
 189                         break;
 190                 }
 191         }
 192 }
 193
 194 function Playlist(tree, index) {
 195
 196         this.tracks = new Array();
 197
 198         var kids = tree.children(index);
 199         var list = 0;
 200         for (child in kids) {
 201                 if (tree.name(kids[child]) == "mlcl") {
 202                         list = kids[child];
 203                         break;
 204                 }
 205         }
 206
 207         if (!list) return;
 208
 209         kids = tree.children(list);
 210         for (child in kids) {
 211                 this.tracks.push(new Track(tree, kids[child]));
 212         }
 213 }
 214
 215 function Album(tree, index) {
 216
 217         this.id = 0;
 218         this.name = "";
 219         this.artist = 0;
 220         this.persistantId = 0;
 221
 222         var kids = tree.children(index);
 223         for (child in kids) {
 224                 var node = kids[child];
 225                 switch (tree.name(node)) {
 226                 case "miid":
 227                         this.id = tree.intVal(node);
 228                         break;
 229                 case "minm":
 230                         this.name = tree.stringVal(node);
 231                         break;
 232                 case "asaa":
 233                         this.artist = tree.stringVal(node);
 234                         break;
 235                 case "mper":
 236                         this.persistantId = tree.longVal(node);
 237                         break;
 238                 }
 239         }
 240 }
 241
 242 function Track(tree, index) {
 243
 244         this.album = "";
 245         this.title = "";
 246         this.artist = "";
 247         this.genre = "";
 248         this.id = 0;
 249         this.persistent = 0;
 250
 251         var kids = tree.children(index);
 252         for (child in kids) {
 253                 var node = kids[child];
 254                 switch (tree.name(node)) {
 255                 case "asal":
 256                         this.album = tree.stringVal(node);
 257                         break;
 258                 case "minm":
 259                         this.title = tree.stringVal(node);
 260                         break;
 261                 case "asar":
 262                         this.artist = tree.stringVal(node);
 263                         break;
 264                 case "asag":
 265                         this.genre = tree.stringVal(node);
 266                         break;
 267                 case "miid":
 268                         this.id = tree.intVal(node);
 269                         break;
 270                 case "mper":
 271                         this.persistent = tree.longVal(node);
 272                         break;
 273                 }
 274         }
 275 }
 276
 277 function sysout(text) {
 278         var p = document.createElement("PRE");
 279         p.className = "debug";
 280         p.appendChild(document.createTextNode(text));
 281         document.body.appendChild(p);
 282 }