Install jquery-file-upload assets for rails.

Gemfile

@@ -33,6 +33,7 @@ gem 'omniauth-facebook', '~> 4.0.0'
 gem 'omniauth-google-oauth2', '~> 0.4.0'
 gem 'omniauth-twitter', '~> 1.4.0'
 gem 'paperclip', '~> 5.1.0'
+gem 'jquery-fileupload-rails'
 gem 'paranoia', '~> 2.3.1'
 gem 'pg', '~> 0.20.0'
 gem 'pg_search', '~> 2.0.1'

Gemfile.lock

@@ -200,6 +200,10 @@ GEM
       railties (>= 3.1, < 6.0)
     invisible_captcha (0.9.2)
       rails (>= 3.2.0)
+    jquery-fileupload-rails (0.4.7)
+      actionpack (>= 3.1)
+      railties (>= 3.1)
+      sass (>= 3.2)
     jquery-rails (4.3.1)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
@@ -515,6 +519,7 @@ DEPENDENCIES
   i18n-tasks (~> 0.9.15)
   initialjs-rails (~> 0.2.0.5)
   invisible_captcha (~> 0.9.2)
+  jquery-fileupload-rails
   jquery-rails (~> 4.3.1)
   jquery-ui-rails (~> 6.0.1)
   kaminari (~> 1.0.1)
@@ -559,4 +564,4 @@ DEPENDENCIES
   whenever (~> 0.9.7)
 
 BUNDLED WITH
-   1.15.1
+   1.15.3

app/assets/javascripts/application.js

@@ -14,6 +14,7 @@
 //= require jquery_ujs
 //= require jquery-ui/widgets/datepicker
 //= require jquery-ui/i18n/datepicker-es
+//= require jquery-fileupload/basic
 //= require foundation
 //= require turbolinks
 //= require ckeditor/loader
@@ -59,6 +60,7 @@
 //= require legislation_annotatable
 //= require watch_form_changes
 //= require followable
+//= require documentable
 //= require tree_navigator
 //= require custom
 
@@ -94,6 +96,7 @@ var initialize_modules = function() {
     App.LegislationAnnotatable.initialize();
   App.WatchFormChanges.initialize();
   App.TreeNavigator.initialize();
+  App.Documentable.initialize();
 };
 
 $(function(){

app/assets/javascripts/documentable.js.coffee

@@ -0,0 +1,64 @@
+App.Documentable =
+
+  initialize: ->
+    $('input#document_attachment[type=file]').fileupload
+
+      add: (e, data) ->
+        data.progressBar = $('<div class="progress-bar"><div class="loading-bar uploading"></div></div>').insertAfter('#progress-bar')
+        options =
+          extension: data.files[0].name.match(/(\.\w+)?$/)[0]
+          _: Date.now()
+        direct_upload_url = $(this).closest('form').data('direct-upload-url')
+        console.log direct_upload_url
+
+        fileData = new FormData();
+        fileData.append('file', data.fileInput[0].files[0]);
+
+        console.log direct_upload_url
+
+        $.getJSON direct_upload_url, options, (result) ->
+          data.formData = result['fields']
+          data.url = result['url']
+          data.paramName = 'file'
+          data.submit()
+          return
+
+        # $.ajax
+        #   url: direct_upload_url
+        #   type: 'POST'
+        #   data: fileData
+        #   cache: false
+        #   contentType: false
+        #   processData: false
+        #   xhr: ->
+        #     console.log 'Progress init'
+        #     myXhr = $.ajaxSettings.xhr()
+        #     if myXhr.upload
+        #       # For handling the progress of the upload
+        #       myXhr.upload.addEventListener 'progress', ((e) ->
+        #         console.log 'progress listener called'
+        #       ), false
+        #
+        #       myXhr.upload.addEventListener 'complete', ((e) ->
+        #         console.log 'complete listener called'
+        #         return
+        #       ), false
+        #     myXhr
+
+      progress: (e, data) ->
+        progress = parseInt(data.loaded / data.total * 100, 10)
+        $('.loading-bar').css 'width', progress + '%'
+        return
+
+      done: (e, data) ->
+        $('.loading-bar').removeClass 'uploading'
+        $('.loading-bar').addClass 'complete'
+        image =
+          id: data.formData.key
+          storage: 'cache'
+          metadata:
+            size: data.files[0].size
+            filename: data.files[0].name.match(/[^\/\\]*$/)[0]
+            mime_type: data.files[0].type
+        $('#cached_attachment_data').val JSON.stringify(image)
+        return

app/assets/stylesheets/application.scss

@@ -15,3 +15,4 @@
 @import 'annotator_overrides';
 @import 'jquery-ui/datepicker';
 @import 'datepicker_overrides';
+@import 'documentable';

app/assets/stylesheets/documentable.scss

@@ -0,0 +1,29 @@
+.progress-bar {
+  background-color: transparent;
+  height: 5px;
+  width: 100%;
+  z-index: 666000555;
+}
+
+.loading-bar {
+  height: 5px;
+  min-width: 10px;
+  z-index: 666000666;
+  -webkit-transition:width 500ms ease-out, height 500ms ease-out;
+  -moz-transition:width 500ms ease-out, height 500ms ease-out;
+  -o-transition:width 500ms ease-out, height 500ms ease-out;
+  transition:width 500ms ease-out, height 500ms ease-out;
+  &.uploading{
+    background-color: #f00;
+  }
+  &.complete{
+    background-color: #0f0;
+  }
+}
+
+.loading-bar.no-transition {
+  -webkit-transition:none;
+  -moz-transition:none;
+  -o-transition:none;
+  transition:none;
+}

app/controllers/documents_controller.rb

@@ -3,7 +3,13 @@ class DocumentsController < ApplicationController
   before_filter :find_documentable, except: :destroy
   before_filter :prepare_new_document, only: :new
   before_filter :prepare_document_for_creation, only: :create
-  load_and_authorize_resource
+
+  before_filter :validate_upload, only: :upload
+  load_and_authorize_resource :except => [:upload]
+  skip_authorization_check :only => [:upload]
+
+  def preload
+  end
 
   def new
   end
@@ -27,6 +33,19 @@ class DocumentsController < ApplicationController
     redirect_to params[:from]
   end
 
+  def upload
+    document = Document.new(documentable: @documentable, attachment: params[:file].tempfile, title: "faketitle", user: current_user )
+    debugger
+    # We only are intested in attachment validators. We set some fake data to get attachment errors only
+    if document.valid?
+      # TODO: Store file on tmp cache
+      msg = { status: 200, msg: "OK" }
+    else
+      msg = { status: 422, msg: document.errors[:attachment].join(', ') }
+    end
+    render :json => msg
+  end
+
   private
 
   def find_documentable
@@ -47,4 +66,8 @@ class DocumentsController < ApplicationController
     params.require(:document).permit(:title, :documentable_type, :documentable_id, :attachment)
   end
 
+  def validate_upload
+    if @documentable.present?
+    end
+  end
 end

app/views/documents/_form.html.erb

@@ -4,7 +4,8 @@
               documentable_id: @document.documentable_id,
               from: params[:from]
              ),
-             html: { multipart: true } do |f| %>
+             html: { multipart: true, class: "documentable"},
+             data: { direct_upload_url: upload_documents_url(documentable_type: @document.documentable_type, documentable_id: @document.documentable_id) } do |f| %>
 
   <%= render 'shared/errors', resource: @document %>
 
@@ -15,14 +16,13 @@
     </div>
 
     <div class="small-12 column">
-      <div class="file-name">
       <%= f.file_field :attachment,
                        accept: accepted_content_types_extensions(@document.documentable),
                        label: false, class: 'show-for-sr' %>
       <%= f.label :attachment, t("documents.form.attachment_label"), class: 'button hollow' %>
+      <div id="progress-bar" class="progress-bar-placeholder"></div>
       <p><%= document_attachment_file_name(@document) %></p>
     </div>
-    </div>
 
     <% if @document.errors.has_key?(:attachment) %>
       <div class="small-12 column source-option-file">

config/routes.rb

@@ -95,7 +95,10 @@ Rails.application.routes.draw do
 
   resources :follows, only: [:create, :destroy]
 
-  resources :documents, only: [:new, :create, :destroy]
+  resources :documents, only: [:new, :create, :destroy] do
+    collection { post :upload, format: :json}
+    collection { post :progress, format: :json}
+  end
 
   resources :stats, only: [:index]
 

db/schema.rb

@@ -936,7 +936,7 @@ ActiveRecord::Schema.define(version: 20170720092638) do
     t.boolean  "email_digest",                              default: true
     t.boolean  "email_on_direct_message",                   default: true
     t.boolean  "official_position_badge",                   default: false
-    t.datetime "password_changed_at",                       default: '2017-07-27 22:09:12', null: false
+    t.datetime "password_changed_at",                       default: '2017-07-31 15:04:53', null: false
     t.boolean  "created_from_signature",                    default: false
     t.integer  "failed_email_digests_count",                default: 0
     t.text     "former_users_data_log",                     default: ""