platforma/static/js/wiki/wikiapi.js

   1 (function($) {
   2
   3         $.wikiapi = {};
   4
   5         var noop = function() {};
   6         var noops = {'success': noop, 'failure': noop};
   7
   8         /*
   9          * Return absolute reverse path of given named view.
  10          * (at least he have it hard-coded in one place)
  11          *
  12          * TODO: think of a way, not to hard-code it here ;)
  13          *
  14          */
  15         function reverse() {
  16                 var vname = arguments[0];
  17
  18                 if(vname == "ajax_document_text") {
  19                         var path = "/" + arguments[1] + "/text";
  20                         if (arguments[2] !== undefined)
  21                                 path += "/" + arguments[2];
  22                         return path;
  23                 }
  24
  25                 if (vname == "ajax_document_history") {
  26                         return "/" + arguments[1] + "/history";
  27                 }
  28
  29                 if (vname == "ajax_document_gallery") {
  30                         return "/gallery/" + arguments[1];
  31                 }
  32
  33                 if(vname == "ajax_document_diff")
  34                         return "/" + arguments[1] + "/diff";
  35
  36                 console.log("Couldn't reverse match:", vname);
  37                 return "/404.html";
  38         };
  39
  40         /*
  41          * Document Abstraction
  42          */
  43         function WikiDocument(element_id) {
  44                 var meta = $('#'+element_id);
  45
  46                 this.id = meta.attr('data-document-name');
  47                 this.revision = $("*[data-key='revision']", meta).text();
  48                 this.galleryLink = $("*[data-key='gallery']", meta).text();
  49                 this.galleryImages = [];
  50                 this.text = null;
  51
  52                 this.has_local_changes = false;
  53                 this._lock = -1;
  54                 this._context_lock = -1;
  55                 this._lock_count = 0;
  56         }
  57
  58 //      WikiDocument.prototype.lock = function() {
  59 //              if(this._lock < 0) {
  60 //                      this._lock = Math.random();
  61 //                      this._context_lock = this._lock;
  62 //                      this._lock_count = 1;
  63 //                      return this._lock;
  64 //              }
  65 //
  66 //              // reentrant locks
  67 //              if(this._context_lock === this._lock) {
  68 //                      this._lock_count += 1;
  69 //                      return this._lock;
  70 //              }
  71 //
  72 //              throw "Document operation in progress. Try again later."
  73 //      };
  74 //
  75 //      WikiDocument.prototype.unlock = function(lockNumber) {
  76 //              if(this.locked === lockNumber) {
  77 //                      this._lock_count -= 1;
  78 //
  79 //                      if(this._lock_count === 0) {
  80 //                              this._lock = -1;
  81 //                              this._context_lock = -1;
  82 //                      };
  83 //                      return;
  84 //              }
  85 //              throw "Trying to unlock with wrong lockNumber";
  86 //      };
  87 //
  88 //      /*
  89 //       * About to leave context of current lock.
  90 //       */
  91 //      WikiDocument.prototype.leaveContext = function() {
  92 //              var old = this._context_lock;
  93 //              this._context_lock = -1;
  94 //              return old;
  95 //      };
  96
  97         /*
  98          * Fetch text of this document.
  99          */
 100         WikiDocument.prototype.fetch = function(params) {
 101                 params = $.extend({}, noops, params);
 102                 var self = this;
 103
 104                 $.ajax({
 105                         method: "GET",
 106                         url: reverse("ajax_document_text", self.id),
 107                         dataType: 'json',
 108                         success: function(data)
 109                         {
 110                                 var changed = false;
 111
 112                                 if (self.text === null || self.revision !== data.revision) {
 113                                         self.text = data.text;
 114                                         self.revision = data.revision;
 115                                         self.gallery = data.gallery;
 116                                         changed = true;
 117                                 }
 118
 119                                 self.has_local_changes = false;
 120                                 params['success'](self, changed);
 121                         },
 122                         error: function() {
 123                                 params['failure'](self, "Nie udało się wczytać treści dokumentu.");
 124                         }
 125                 });
 126         };
 127
 128         /*
 129          * Fetch history of this document.
 130          *
 131          * from - First revision to fetch (default = 0)
 132          * upto - Last revision to fetch (default = tip)
 133          *
 134          */
 135         WikiDocument.prototype.fetchHistory = function(params) {
 136                 /* this doesn't modify anything, so no locks */
 137                 params = $.extend({}, noops, params);
 138                 var self = this;
 139
 140                 $.ajax({
 141                         method: "GET",
 142                         url: reverse("ajax_document_history", self.id),
 143                         dataType: 'json',
 144                         data: {"from": params['from'], "upto": params['upto']},
 145                         success: function(data) {
 146                                 params['success'](self, data);
 147                         },
 148                         error: function() {
 149                                 params['failure'](self, "Nie udało się wczytać historii dokumentu.");
 150                         }
 151                 });
 152         };
 153
 154         WikiDocument.prototype.fetchDiff = function(params) {
 155                 /* this doesn't modify anything, so no locks */
 156                 params = $.extend({
 157                         'from': self.revision,
 158                         'to': self.revision
 159                 }, noops, params);
 160
 161                 var self = this;
 162
 163                 $.ajax({
 164                         method: "GET",
 165                         url: reverse("ajax_document_diff", self.id),
 166                         dataType: 'json',
 167                         data: {"from": params['from'], "to": params['to']},
 168                         success: function(data) {
 169                                 params['success'](self, data);
 170                         },
 171                         error: function() {
 172                                 params['failure'](self, "Nie udało się wczytać porównania wersji.");
 173                         }
 174                 });
 175         };
 176
 177         /*
 178          * Fetch gallery
 179          */
 180         WikiDocument.prototype.refreshGallery = function(params) {
 181                 params = $.extend({}, noops, params);
 182                 var self = this;
 183
 184                 $.ajax({
 185                         method: "GET",
 186                         url: reverse("ajax_document_gallery", self.galleryLink),
 187                         dataType: 'json',
 188                         // data: {},
 189                         success: function(data) {
 190                                 this.galleryImages = data.images;
 191                                 params['success'](self, data);
 192                         },
 193                         error: function() {
 194                                 this.galleryImages = [];
 195                                 params['failure'](self, "<p>Nie udało się wczytać gallerii pod nazwą: '"
 196                                         + self.galleryLink + "'.</p>");
 197
 198                         }
 199                 });
 200         };
 201
 202         /*
 203          * Set document's text
 204          */
 205         WikiDocument.prototype.setText = function(text) {
 206                 if (this.text != text) {
 207                         this.text = text;
 208                         this.has_local_changes = true;
 209                 }
 210         };
 211
 212         /*
 213          * Set document's gallery link
 214          */
 215         WikiDocument.prototype.setGalleryLink = function(gallery) {
 216                 this.galleryLink = gallery;
 217                 this.has_local_changes = true;
 218         };
 219
 220         /*
 221          * Save text back to the server
 222          */
 223         WikiDocument.prototype.save = function(params){
 224                 params = $.extend({'comment': 'No comment.'}, noops, params);
 225                 var self = this;
 226
 227                 /* you can't set text while some is fetching it (or saving) */
 228
 229                 if (!self.has_local_changes) {
 230                         console.log("Abort: no changes.");
 231                         return params['success'](self, false, "Nie ma zmian do zapisania.");
 232                 };
 233
 234                 var metaComment = '<!--';
 235                 metaComment += '\n\tgallery:' + self.galleryLink;
 236                 metaComment += '\n-->\n'
 237
 238                 var data = {
 239                         name: self.id,
 240                         text: metaComment + self.text,
 241                         parent_revision: self.revision,
 242                         comment: params['comment'],
 243                 };
 244
 245                 $.ajax({
 246                         url: reverse("ajax_document_text", self.id),
 247                         type: "POST",
 248                         dataType: "json",
 249                         data: data,
 250                         success: function(data){
 251                                 var changed = false;
 252                                 if (data.text) {
 253                                         self.text = data.text;
 254                                         self.revision = data.revision;
 255                                         self.gallery = data.gallery;
 256                                         changed = true;
 257                                 }
 258                                 params['success'](self, changed, "Zapisano");
 259                         },
 260                         error: function() {
 261                                 params['failure'](self, "Nie udało się zapisać.");
 262                         }
 263                 });
 264         }; /* end of save() */
 265
 266         $.wikiapi.WikiDocument = WikiDocument;
 267
 268 })(jQuery);