js/app.helpers.js

   1 /*jslint devel: true*/
   2 /*global $, jQuery */
   3
   4 /**
   5  * @class Helpers
   6  */
   7 function Helpers() {
   8         'use strict';
   9 }
  10
  11 (function () { // strict mode wrapper
  12         'use strict';
  13         Helpers.prototype = {
  14
  15                 extensions: {
  16                         '.bmp':  {mime:'image/*', icon:'img.png'},
  17                         '.gif':  {mime:'image/*', icon:'img.png'},
  18                         '.jpeg': {mime:'image/*', icon:'img.png'},
  19                         '.jpg':  {mime:'image/*', icon:'img.png'},
  20                         '.png':  {mime:'image/*', icon:'img.png'},
  21                         '.tiff': {mime:'image/*', icon:'img.png'},
  22                         '.3ga':  {mime:'audio/*', icon:'music.png'},
  23                         '.aac':  {mime:'audio/*', icon:'music.png'},
  24                         '.ac3':  {mime:'audio/*', icon:'music.png'},
  25                         '.amr':  {mime:'audio/*', icon:'music.png'},
  26                         '.awb':  {mime:'audio/*', icon:'music.png'},
  27                         '.m4a':  {mime:'audio/*', icon:'music.png'},
  28                         '.m4p':  {mime:'audio/*', icon:'music.png'},
  29                         '.m4r':  {mime:'audio/*', icon:'music.png'},
  30                         '.mp3':  {mime:'audio/*', icon:'music.png'},
  31                         '.ogg':  {mime:'audio/*', icon:'music.png'},
  32                         '.wav':  {mime:'audio/*', icon:'music.png'},
  33                         '.wma':  {mime:'audio/*', icon:'music.png'},
  34                         '.3gp':  {mime:'video/*', icon:'video.png'},
  35                         '.avc':  {mime:'video/*', icon:'video.png'},
  36                         '.avi':  {mime:'video/*', icon:'video.png'},
  37                         '.m4v':  {mime:'video/*', icon:'video.png'},
  38                         '.mkv':  {mime:'video/*', icon:'video.png'},
  39                         '.mov':  {mime:'video/*', icon:'video.png'},
  40                         '.mp4':  {mime:'video/*', icon:'video.png'},
  41                         '.mpeg': {mime:'video/*', icon:'video.png'},
  42                         '.mpg':  {mime:'video/*', icon:'video.png'},
  43                         '.ogv':  {mime:'video/*', icon:'video.png'},
  44                         '.vc1':  {mime:'video/*', icon:'video.png'},
  45                         '.wmv':  {mime:'video/*', icon:'video.png'},
  46                         '.doc':  {mime:'',      icon:'text.png'},
  47                         '.docx': {mime:'',      icon:'text.png'},
  48                         '.odt':  {mime:'',      icon:'text.png'},
  49                         '.ods':  {mime:'',      icon:'text.png'},
  50                         '.txt':  {mime:'',      icon:'text.png'},
  51                         '.xls':  {mime:'',      icon:'text.png'},
  52                         '.xlsx': {mime:'',      icon:'text.png'},
  53                         '.pdf':  {mime:'',      icon:'pdf.png'},
  54                         '.odp':  {mime:'',      icon:'ppt.png'},
  55                         '.ppt':  {mime:'',      icon:'ppt.png'},
  56                         '.wgt':  {mime:'application/widget', icon:'etc.png'}
  57                 },
  58
  59                 /**
  60                  * Capitalise the first letter
  61                  *
  62                  * @param {string} text
  63                  * @returns {string}
  64                  */
  65                 UCFirst: function Helpers_UCFirst(text) {
  66                         return text.charAt(0).toUpperCase() + text.slice(1);
  67                 },
  68
  69                 /**
  70                  * @param {string} fileName
  71                  * @returns {string} file name without extension
  72                  */
  73                 getFileName: function Helpers_getFileName(fileName) {
  74                         var fileNameLen = fileName.indexOf('.');
  75                         if (fileNameLen !== -1) {
  76                                 fileName = fileName.slice(0, fileNameLen);
  77                         }
  78                         return fileName;
  79                 },
  80
  81                 /**
  82                  * @param {string} fileName
  83                  * @returns {string} extension for specified file name
  84                  */
  85                 getFileExtension: function Helpers_getFileExtension(fileName) {
  86                         var splittedFileName = fileName.split('.'),
  87                                 ext = '';
  88
  89                         if (splittedFileName.length > 1) {
  90                                 ext = '.' + splittedFileName.pop();
  91                         }
  92                         return ext;
  93                 },
  94
  95                 /**
  96                  * Return icon filename for the given extension.
  97                  * For example, for '.mp3' returns 'music.png'
  98                  *
  99                  * @param {string} ext
 100                  * @return {string}
 101                  */
 102                 resolveFileIcon: function Helpers_resolveFileIcon(ext) {
 103                         ext = ext.toLowerCase();
 104                         var info = this.extensions[ext];
 105                         return info ? info.icon : 'etc.png';
 106                 },
 107
 108                 /**
 109                  * Resolve file extension to MIME type
 110                  *
 111                  * @param {string} ext File extension
 112                  * @returns {string}
 113                  */
 114                 resolveMimeType: function Helpers_resolveMimeType(ext) {
 115                         ext = ext.toLowerCase();
 116                         var info = this.extensions[ext];
 117                         return info ? info.mime : '';
 118                 },
 119
 120                 /**
 121                  * Returns thumbnail URI for specified file
 122                  * @param {string} fileName
 123                  * @param {File} node
 124                  * @returns {string}
 125                  */
 126                 getThumbnailURI: function Helpers_getThumbnailURI(fileName, node) {
 127                         var ext = this.getFileExtension(fileName);
 128
 129                         if (!node.thumbnailURIs) {
 130                                 return  'images/' + this.resolveFileIcon(ext);
 131                         }
 132
 133                         if (node.thumbnailURIs[0] && $.inArray(ext, ['.mp4', '.jpg', '.png', '.gif'])) {
 134                                 return node.thumbnailURIs[0];
 135                         }
 136
 137                         return 'images/etc.png';
 138                 },
 139
 140                 /**
 141                  * File name automatic number increase for copy files
 142                  */
 143                 getCopyFileName: function (sourceName, filesList) {
 144                         var ext = this.getFileExtension(sourceName),
 145                                 fileName = this.getFileName(sourceName),
 146                                 copyFileName = sourceName,
 147                                 i = 1;
 148
 149                         while ($.inArray(copyFileName, filesList) !== -1) {
 150                                 i += 1;
 151                                 copyFileName = fileName + '(' + i + ')' + ext;
 152                         }
 153                         return copyFileName;
 154                 }
 155         };
 156 }());