Refactor attachment saving for DRYness

// FREEBIE

js/views/attachment_view.js

@@ -72,37 +72,41 @@
         'click': 'onclick'
     },
     onclick: function(e) {
-        if (this.contentType === 'image') {
-            var view = new Whisper.LightboxView({
-                model: {
-                    url      : this.objectUrl,
-                    blob     : this.blob,
-                    fileType : this.fileType
+        switch (this.contentType) {
+            case 'audio':
+            case 'video':
+                return;
+            case 'image':
+                var view = new Whisper.LightboxView({ model: this });
+                view.render();
+                view.$el.appendTo(this.el);
+                view.$el.trigger('show');
+                break;
+
+            default:
+                this.saveFile();
+        }
+    },
+    saveFile: function() {
+        var blob = this.blob;
+        var suggestedName;
+        if (this.fileType) {
+            suggestedName = 'signal.' + this.fileType;
+        }
+        var w = extension.windows.getViews()[0];
+        if (w && w.chrome && w.chrome.fileSystem) {
+            w.chrome.fileSystem.chooseEntry({
+                type: 'saveFile', suggestedName: suggestedName
+            }, function(entry) {
+                if (!entry) {
+                    return;
                 }
+                entry.createWriter(function(fileWriter) {
+                    fileWriter.write(blob);
+                });
             });
-            view.render();
-            view.$el.appendTo(this.el);
-            view.$el.trigger('show');
-        } else if (this.contentType !== 'audio' && this.contentType !== 'video') {
-            var suggestedName;
-            if (this.fileType) {
-                suggestedName = 'signal.' + this.fileType;
-            }
-            var w = extension.windows.getViews()[0];
-            if (w && w.chrome && w.chrome.fileSystem) {
-                w.chrome.fileSystem.chooseEntry({
-                    type: 'saveFile', suggestedName: suggestedName
-                }, function(entry) {
-                    if (!entry) {
-                        return;
-                    }
-                    entry.createWriter(function(fileWriter) {
-                        fileWriter.write(this.blob);
-                    }.bind(this));
-                }.bind(this));
-            } else {
-                console.log('Failed to get window');
-            }
+        } else {
+            console.log('Failed to get window');
         }
     },
     render: function() {
@@ -133,25 +137,7 @@
           'click': 'onclick'
       },
       save: function(e) {
-            var suggestedName;
-            if (this.model.fileType) {
-                suggestedName = 'signal.' + this.model.fileType;
-            }
-            var w = extension.windows.getViews()[0];
-            if (w && w.chrome && w.chrome.fileSystem) {
-                w.chrome.fileSystem.chooseEntry({
-                    type: 'saveFile', suggestedName: suggestedName
-                }, function(entry) {
-                    if (!entry) {
-                        return;
-                    }
-                    entry.createWriter(function(fileWriter) {
-                        fileWriter.write(this.model.blob);
-                    }.bind(this));
-                }.bind(this));
-            } else {
-                console.log('Failed to get window');
-            }
+            this.model.saveFile();
       },
       onclick: function(e) {
           var $el = this.$(e.target);
@@ -162,7 +148,7 @@
           }
       },
       render_attributes: function() {
-          return { url: this.model.url };
+          return { url: this.model.objectUrl };
       }
   });