Implements drag and drop upload of image in every markdown-area

Gemfile

@@ -69,6 +69,9 @@ gem "haml-rails"
 # Files attachments
 gem "carrierwave"
 
+# Drag and Drop UI
+gem 'dropzonejs-rails'
+
 # for aws storage
 gem "fog", "~> 1.14", group: :aws
 gem "unf", group: :aws

Gemfile.lock

@@ -103,6 +103,8 @@ GEM
     diffy (3.0.3)
     docile (1.1.1)
     dotenv (0.9.0)
+    dropzonejs-rails (0.4.14)
+      rails (> 3.1)
     email_spec (1.5.0)
       launchy (~> 2.1)
       mail (~> 2.2)
@@ -579,6 +581,7 @@ DEPENDENCIES
   devise (= 3.0.4)
   devise-async (= 0.8.0)
   diffy (~> 3.0.3)
+  dropzonejs-rails
   email_spec
   email_validator (~> 1.4.0)
   enumerize

app/assets/javascripts/application.js.coffee

@@ -29,6 +29,7 @@
 #= require underscore
 #= require nprogress
 #= require nprogress-turbolinks
+#= require dropzone
 #= require_tree .
 
 window.slugify = (text) ->

app/assets/javascripts/behaviors/toggler_behavior.coffee

@@ -1,6 +1,6 @@
 $ ->
   $("body").on "click", ".js-toggler-target", ->
-    container = $(@).closest(".js-toggler-container")
+    container = $(".notes-container")
     container.toggleClass("on")
 
   # Toggle button. Show/hide content inside parent container.

app/assets/javascripts/markdown_area.js.coffee

@@ -0,0 +1,85 @@
+formatLink = (str) ->
+  "![" + str.alt + "](" + str.url + ")"
+
+$(document).ready ->
+  alertClass = "alert alert-danger alert-dismissable div-dropzone-alert"
+  alertAttr = "class=\"close\" data-dismiss=\"alert\"" + "aria-hidden=\"true\""
+  divHover = "<div class=\"div-dropzone-hover\"></div>"
+  divSpinner = "<div class=\"div-dropzone-spinner\"></div>"
+  divAlert = "<div class=\"" + alertClass + "\"></div>"
+  iconPicture = "<i class=\"icon-picture div-dropzone-icon\"></i>"
+  iconSpinner = "<i class=\"icon-spinner icon-spin div-dropzone-icon\"></i>"
+  btnAlert = "<button type=\"button\"" + alertAttr + ">&times;</button>"
+  project_image_path_upload = window.project_image_path_upload or null
+
+  $("textarea.markdown-area").wrap "<div class=\"div-dropzone\"></div>"  
+
+  $(".div-dropzone").parent().addClass "div-dropzone-wrapper"
+
+  $(".div-dropzone").append divHover
+  $(".div-dropzone-hover").append iconPicture
+  $(".div-dropzone").append divSpinner 
+  $(".div-dropzone-spinner").append iconSpinner
+
+
+  dropzone = $(".div-dropzone").dropzone(
+    url: project_image_path_upload
+    dictDefaultMessage: ""
+    clickable: true
+    paramName: "markdown_img"
+    maxFilesize: 10
+    uploadMultiple: false
+    acceptedFiles: "image/jpg,image/jpeg,image/gif,image/png"
+    headers: 
+      "X-CSRF-Token": $("meta[name=\"csrf-token\"]").attr("content")
+
+    previewContainer: false
+
+    processing: ->
+      $(".div-dropzone-alert").alert "close"
+
+    dragover: ->
+      $(".div-dropzone > textarea").addClass "div-dropzone-focus"
+      $(".div-dropzone-hover").css "opacity", 0.7
+      return
+
+    dragleave: ->
+      $(".div-dropzone > textarea").removeClass "div-dropzone-focus"
+      $(".div-dropzone-hover").css "opacity", 0
+      return
+
+    drop: ->
+      $(".div-dropzone > textarea").removeClass "div-dropzone-focus"
+      $(".div-dropzone-hover").css "opacity", 0
+      $(".div-dropzone > textarea").focus()
+      return
+
+    success: (header, response) ->
+      child = $(dropzone[0]).children("textarea")
+      $(child).val $(child).val() + formatLink(response.link) + "\n"
+      return
+
+    error: (temp, errorMessage) ->
+      checkIfMsgExists = $(".error-alert").children().length
+      if checkIfMsgExists is 0
+        $(".error-alert").append divAlert
+        $(".div-dropzone-alert").append btnAlert + errorMessage
+      return
+
+    sending: ->
+      $(".div-dropzone-spinner").css "opacity", 0.7
+      return
+
+    complete: ->
+      $(".dz-preview").remove()
+      $(".markdown-area").trigger "input"
+      $(".div-dropzone-spinner").css "opacity", 0
+      return
+  )
+
+  $(".markdown-selector").click (e) ->
+    e.preventDefault()
+    $(".div-dropzone").click()
+    return
+
+  return

app/assets/stylesheets/application.scss

@@ -10,6 +10,7 @@
  *= require_self
  *= require nprogress
  *= require nprogress-bootstrap
+ *= require dropzone/basic
 */
 
 @import "main/*";

app/assets/stylesheets/behaviors.scss

@@ -5,10 +5,19 @@
 .js-details-container.open .content { display: block; }
 .js-details-container.open .content.hide { display: none; }
 
-
 // Toggler
 //--------
-.js-toggler-container .turn-on  { display: inherit; }
+.write-preview-btn .turn-on  { display: inherit; }
+.write-preview-btn .turn-off { display: none; }
+
 .js-toggler-container .turn-off { display: none; }
 .js-toggler-container.on .turn-on  { display: none; }
 .js-toggler-container.on .turn-off { display: inherit; }
+
+.js-toggler-container.on ~ .note-form-actions { 
+	.write-preview-btn .turn-on { display: none; }
+}
+
+.js-toggler-container.on ~ .note-form-actions { 
+	.write-preview-btn .turn-off { display: inherit; }
+}

app/assets/stylesheets/generic/markdown_area.scss

@@ -0,0 +1,58 @@
+.div-dropzone-wrapper {
+  .div-dropzone {
+    position: relative;
+    padding: 0;
+    border: 0;
+    margin-bottom: 5px;
+
+    .div-dropzone-focus {
+      border-color: #66afe9 !important;
+      box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(102, 175, 233, 0.6) !important;
+      outline: 0 !important;
+    }
+
+    .div-dropzone-hover {
+      position: absolute;
+      top: 50%;
+      left: 50%;
+      margin-top: -0.5em;
+      margin-left: -0.6em;
+      opacity: 0;
+      font-size: 50px;
+      transition: opacity 200ms ease-in-out;
+    }
+
+    .div-dropzone-spinner {
+      position: absolute;
+      top: 100%;
+      left: 100%;
+      margin-top: -1.1em;
+      margin-left: -1.1em;
+      opacity: 0;
+      font-size: 30px;
+      transition: opacity 200ms ease-in-out;
+    }
+
+    .div-dropzone-icon {
+      display: block;
+      text-align: center;
+      font-size: inherit;
+    }
+
+    .dz-preview {
+      display: none;
+    }
+  }
+
+  .hint {
+    float: left;
+    padding: 0;
+    margin: 0;
+  }
+}
+
+.div-dropzone-alert {
+  margin-top: 5px;
+  margin-bottom: 0;
+  transition: opacity 200ms ease-in-out;
+}

app/assets/stylesheets/sections/notes.scss

@@ -272,21 +272,16 @@ ul.notes {
     margin-bottom: 0;
   }
   .note_text_and_preview {
-    // makes the "absolute" position for links relative to this
-    position: relative;
-
-    // preview/edit buttons
-    > a {
-      position: absolute;
-      right: 5px;
-      bottom: -60px;
-    }
     .note_preview {
       background: #f5f5f5;
       border: 1px solid #ddd;
       @include border-radius(4px);
       min-height: 80px;
       padding: 4px 6px;
+
+      > p {
+        overflow-x: auto;
+      }
     }
     .note_text {
       border: 1px solid #DDD;
@@ -310,15 +305,13 @@ ul.notes {
   float: none;
 }
 
-
 .common-note-form {
   margin: 0;
   background: #F9F9F9;
   padding: 3px;
   border: 1px solid #DDD;
 }
 
-
 .note-form-actions {
   background: #F9F9F9;
   height: 45px;
@@ -333,6 +326,18 @@ ul.notes {
   .js-notify-commit-author {
     float: left;
   }
+
+  .write-preview-btn {
+    // makes the "absolute" position for links relative to this
+    position: relative;
+
+    // preview/edit buttons
+    > a {
+      position: absolute;
+      right: 5px;
+      top: 8px;
+    }
+  }
 }
 
 .note-edit-form {
@@ -367,3 +372,8 @@ ul.notes {
 .parallel-comment {
   padding: 6px;
 }
+
+.error-alert > .alert {
+  margin-top: 5px;
+  margin-bottom: 5px;
+}

app/controllers/files_controller.rb

@@ -14,4 +14,3 @@ def download
     end
   end
 end
-

app/controllers/projects/issues_controller.rb

@@ -69,7 +69,9 @@ def create
           render :new
         end
       end
-      format.js
+      format.js do |format|
+        @link = @issue.attachment.url.to_js
+      end
     end
   end
 

app/controllers/projects_controller.rb

@@ -162,8 +162,28 @@ def unarchive
     end
   end
 
+  def upload_image
+    uploader = FileUploader.new('uploads', upload_path, accepted_images)
+    alt = params['markdown_img'].original_filename
+    uploader.store!(params['markdown_img'])
+    link = { 'alt' => File.basename(alt, '.*'),
+             'url' => File.join(root_url, uploader.url) }
+    respond_to do |format|
+      format.json { render json: { link: link } }
+    end
+  end
+
   private
 
+  def upload_path
+    base_dir = FileUploader.generate_dir
+    File.join(repository.path_with_namespace, base_dir)
+  end
+
+  def accepted_images
+    %w(png jpg jpeg gif)
+  end
+
   def set_title
     @title = 'New Project'
   end

app/models/issue.rb

@@ -15,8 +15,12 @@
 #  milestone_id :integer
 #  state        :string(255)
 #  iid          :integer
+#  attachment   :string(255)
 #
 
+require 'carrierwave/orm/activerecord'
+require 'file_size_validator'
+
 class Issue < ActiveRecord::Base
   include Issuable
   include InternalId

app/uploaders/file_uploader.rb

@@ -0,0 +1,41 @@
+# encoding: utf-8
+class FileUploader < CarrierWave::Uploader::Base
+  storage :file
+
+  def initialize(base_dir, path = '', allowed_extensions = nil)
+    @base_dir = base_dir
+    @path = path
+    @allowed_extensions = allowed_extensions
+  end
+
+  def base_dir
+    @base_dir
+  end
+
+  def store_dir
+    File.join(@base_dir, @path)
+  end
+
+  def cache_dir
+    File.join(@base_dir, 'tmp', @path)
+  end
+
+  def extension_white_list
+    @allowed_extensions
+  end
+
+  def store!(file)
+    file.original_filename = self.class.generate_filename(file)
+    super
+  end
+
+  def self.generate_filename(file)
+    original_filename = File.basename(file.original_filename, '.*')
+    extension = File.extname(file.original_filename)
+    new_filename = Digest::MD5.hexdigest(original_filename) + extension
+  end
+
+  def self.generate_dir
+    SecureRandom.hex(5)
+  end
+end

app/views/layouts/admin.html.haml

@@ -10,3 +10,4 @@
 
     .container
       .content= yield
+    = yield :embedded_scripts