Add a multiUpload option to asset manager to allow forcing single file only uploads and configuring the exact filename in the form

docs/modules/Assets.md

@@ -66,6 +66,10 @@ Below the list of currently available options
   // The credentials setting for the upload request, eg. 'include', 'omit'
   credentials: 'include',
 
+  // Allow uploading multiple files per request.
+  // If disabled filename will not have '[]' appended
+  multiUpload: true,
+
   // If true, tries to add automatically uploaded assets.
   // To make it work the server should respond with a JSON containing assets
   // in a data key, eg:

src/asset_manager/config/config.js

@@ -32,6 +32,10 @@ module.exports = {
   // The credentials setting for the upload request, eg. 'include', 'omit'
   credentials: 'include',
 
+  // Allow uploading multiple files per request.
+  // If disabled filename will not have '[]' appended
+  multiUpload: true,
+
   // If true, tries to add automatically uploaded assets.
   // To make it work the server should respond with a JSON containing assets
   // in a data key, eg:

src/asset_manager/view/FileUploader.js

@@ -7,7 +7,7 @@ module.exports = Backbone.View.extend(
     template: _.template(`
   <form>
     <div id="<%= pfx %>title"><%= title %></div>
-    <input type="file" id="<%= uploadId %>" name="file" accept="*/*" <%= disabled ? 'disabled' : '' %> multiple/>
+    <input type="file" id="<%= uploadId %>" name="file" accept="*/*" <%= disabled ? 'disabled' : '' %> <%= multiUpload ? 'multiple' : '' %>/>
     <div style="clear:both;"></div>
   </form>
   `),
@@ -26,6 +26,7 @@ module.exports = Backbone.View.extend(
         c.disableUpload !== undefined
           ? c.disableUpload
           : !c.upload && !c.embedAsBase64;
+      this.multiUpload = c.multiUpload !== undefined ? c.multiUpload : true;
       this.events['change #' + this.uploadId] = 'uploadFile';
       let uploadFile = c.uploadFile;
 
@@ -78,7 +79,13 @@ module.exports = Backbone.View.extend(
       const em = this.config.em;
       const config = this.config;
       const target = this.target;
-      const json = typeof text === 'string' ? JSON.parse(text) : text;
+      let json;
+      try {
+        json = typeof text === 'string' ? JSON.parse(text) : text;
+      } catch (e) {
+        json = text;
+      }
+
       em && em.trigger('asset:upload:response', json);
 
       if (config.autoAdd && target) {
@@ -101,14 +108,18 @@ module.exports = Backbone.View.extend(
       const config = this.config;
       const params = config.params;
 
-      for (let i = 0; i < files.length; i++) {
-        body.append(`${config.uploadName}[]`, files[i]);
-      }
-
       for (let param in params) {
         body.append(param, params[param]);
       }
 
+      if (this.multiUpload) {
+        for (let i = 0; i < files.length; i++) {
+          body.append(`${config.uploadName}[]`, files[i]);
+        }
+      } else if (files.length) {
+        body.append(config.uploadName, files[0]);
+      }
+
       var target = this.target;
       const url = config.upload;
       const headers = config.headers;
@@ -229,6 +240,7 @@ module.exports = Backbone.View.extend(
           title: this.config.uploadText,
           uploadId: this.uploadId,
           disabled: this.disabled,
+          multiUpload: this.multiUpload,
           pfx: this.pfx
         })
       );

test/specs/asset_manager/view/FileUploader.js

@@ -67,6 +67,18 @@ module.exports = {
           );
         });
 
+        test('Handles multiUpload false', () => {
+          var view = new FileUploader({
+            config: {
+              multiUpload: false
+            }
+          });
+          view.render();
+          expect(
+            view.$el.find('input[type=file]').prop('multiple')
+          ).toBeFalsy();
+        });
+
         test('Handles embedAsBase64 parameter', () => {
           var view = new FileUploader({
             config: {