S3 uploader, slide cover

Gemfile

@@ -140,3 +140,5 @@ gem 'annotate', ">=2.6.0"
 gem 'kaminari', github: 'amatsuda/kaminari'
 
 gem 'jwt', '0.1.11'
+
+gem 'rmagick', :require => 'RMagick'

Gemfile.lock

@@ -291,6 +291,7 @@ GEM
     rest-client (1.7.2)
       mime-types (>= 1.16, < 3.0)
       netrc (~> 0.7)
+    rmagick (2.13.2)
     rspec (3.0.0)
       rspec-core (~> 3.0.0)
       rspec-expectations (~> 3.0.0)
@@ -440,6 +441,7 @@ DEPENDENCIES
   pry-rails
   rack-mini-profiler
   rails (~> 4.1)
+  rmagick
   rspec-rails
   rubocop
   sass-rails

app/assets/javascripts/modules/mod-fileuploader.js.coffee

@@ -11,12 +11,15 @@ $.extend
         $.each data.result.files, (index, file) ->
           # TODO: カーソル位置に挿入
 
+          console.log file
+
           if file.type is 'image'
             # image ![file-name](file-url)
-            settings.$textarea.val(settings.$textarea.val() + "\n![" + file.name + "](" + file.url + ")\n")
+            settings.$textarea.val(settings.$textarea.val() + "\n![" + file.name + "](" + file.image + ")\n")
           else if file.type is 'slide'
             # slide !slide!(file-url)
-            settings.$textarea.val(settings.$textarea.val() + "\n!slide!(" + file.url + ")\n")
+            # [![alt text](image link)](web link)
+            settings.$textarea.val(settings.$textarea.val() + "\n[![" + file.name + "](" + file.image + ")](" + file.url + ")\n")
 
           settings.$textarea.trigger("change")
           # $('<p/>').text(file.name).appendTo('#files') # TODO

app/controllers/apis_controller.rb

@@ -11,32 +11,36 @@ class ApisController < ApplicationController
   end
 
   # Receive file and upload to S3
+  # @response [JSON]
+  #  { "status": "OK",
+  #    "files": [
+  #      { "name": <file name>, "url": <link url>, "image": <image url>, "type": <file type>}, ...
+  #     ]
+  #  }
   def file_receiver
-    s3 = AWS::S3.new
-    bucket_name = "#{Settings.s3.bucket_name}/1/#{current_user.id}"
-    # bucket_name = "1/#{current_user.id}"
-    bucket = s3.buckets[bucket_name]
+    s3_uploader = S3Uploader.new(bucket: "#{Settings.s3.bucket_name}/1/#{current_user.id}")
 
     s3_files = []
 
     params[:files].each do |file|
-      basename = File.basename(file.path)
-
+      # Skip uploading if file ext is not listed.
       next unless file.original_filename =~ /\.(jpe?g|png|gif|pdf)\Z/
 
       object_file_name = "#{Digest::MD5.file(file.path).to_s}#{File.extname(file.original_filename)}"
-      obj = bucket.objects[object_file_name]
-
-      res = obj.write(file: file.path, acl: :public_read)
+      res = s3_uploader.upload!(file: file.path, name: object_file_name)
 
-      file_type = case file.original_filename
+      case file.original_filename
       when /\.(jpe?g|png|gif)\Z/
-        :image
+        s3_files << { type: 'image', name: file.original_filename, image: res.public_url.to_s }
       when /\.pdf\Z/
-        :slide
-      end
+        cover_image_name = "#{Digest::MD5.file(file.path).to_s}-cover.png"
+        pdf = Magick::ImageList.new(file.path)
+        cover_tmp = Rails.root.join('tmp', cover_image_name)
+        pdf[0].write(cover_tmp)
+        cover_res = s3_uploader.upload!(file: cover_tmp, name: cover_image_name)
 
-      s3_files << { name: file.original_filename, url: res.public_url.to_s, type: file_type }
+        s3_files << { type: 'slide', name: cover_image_name, url: res.public_url.to_s, image: cover_res.public_url.to_s }
+      end
     end
 
     render json: { status: 'OK', files: s3_files }

app/models/s3_uploader.rb

+class S3Uploader
+  # Preparing S3 object and bucket.
+  # @param [String] access_key_id.
+  # @param [String] secret_access_key.
+  # @param [String] region: uploading S3 bucket region.
+  # @param [String] bucket: uploading backet name.
+  def initialize(access_key_id: Settings.s3.access_key_id,
+    secret_access_key: Settings.s3.secret_access_key,
+    region: "ap-northeast-1",
+    bucket:)
+    @s3 = AWS::S3.new(access_key_id: access_key_id,
+                      secret_access_key: secret_access_key,
+                      region: region)
+    @bucket = @s3.buckets[bucket]
+  end
+
+  # Upload file to S3
+  # @param [String] file: uploading file path.
+  # @param [String] name: uploading file name.
+  def upload!(file:, name:)
+    obj = @bucket.objects[name]
+    obj.write(file: file, acl: :public_read)
+  end
+end

config/initializers/aws_sdk.rb

-AWS.config(
-  access_key_id: Settings.s3.access_key_id,
-  secret_access_key: Settings.s3.secret_access_key,
-  s3_endpoint: "s3-ap-northeast-1.amazonaws.com"
-)