allow file download

Author: LIN251

app/controllers/exercises_controller.rb

@@ -623,16 +623,26 @@ def practice
     allresfiles = @exercise_version.prompts[0].question.scan(/\!\[\]\((.*?)\)/)
     allresfiles.each do |filename|
       if allOwnerships.find_by(filename: filename[0]).nil? 
-        @exercise_version.prompts[0].question = @exercise_version.prompts[0].question.gsub("![](#{filename[0]})", "![](**IMAGE DOES NOT EXIST**)")
+        @exercise_version.prompts[0].question = @exercise_version.prompts[0].question.gsub("![](#{filename[0]})", "[**#{filename[0]}** does not exist!]")
+
       else
         uniqueFile = ResourceFile.where(id: allOwnerships.find_by(filename: filename[0]).resource_file_id)[0].filename
         uniqueFilename = uniqueFile.model.token+uniqueFile.file.file.match(/\.\w*/)[0]
         @exercise_version.prompts[0].question = @exercise_version.prompts[0].question.gsub("![](#{filename[0]})", "![](/uploads/resource_file/#{uniqueFilename})")
       end
-
     end
+    @allFiles= []
+    @allFilesRegularName= []
+    allOwnerships.each do |res|
+      if ![".jpg",".jpeg",".png",".gif"].include?(File.extname(res.filename))
+        @allFilesRegularName.push(res.filename)
+        uniqueFile = ResourceFile.where(id: res.resource_file_id)[0].filename
+        uniqueFilename = uniqueFile.model.token+uniqueFile.file.file.match(/\.\w*/)[0]
+        @allFiles.push(uniqueFilename)
+      end
+    end
+    @fileres = @allFiles.zip @allFilesRegularName
     render layout: 'two_columns'
-
   end
 
 

app/views/exercises/_oneblockform.html.haml

@@ -1,6 +1,5 @@
 %p.text.text-info
   Use the editor below or upload an existing YAML file from your computer.
-
 - # list will be [ "Only Me", "user's", "user", "groups", "Everybody"
 - access_control_items = @user_groups.map{ |g| [ g.name, g.id ] }.unshift(['Only Me', 0]).push(['Everybody', -1])
 = semantic_form_for @exercise, url: exercises_upload_create_path, method: :post do |f|
@@ -17,16 +16,9 @@
           input_html: { class: 'code', autofocus: true, data: { lang: 'text/x-yaml' },
           value: @text_representation.present? ? @text_representation : '' }, 
           label: 'YAML Representation of the Exercise:'
-  
-
-
-
   = f.text_field :fileList, value: "", :type => "hidden"
   = f.text_field :oldfileList, value: @ownerships_all, :type => "hidden"
   = f.text_field :ownerships_res_name, value: @ownerships_res_name, :type => "hidden"
-
-
-
   #fileName
   #filelist.container.hidden
     .row
@@ -41,22 +33,14 @@
               %th.col-sm-1  Pixel
               %th.col-sm-1  Uploaded
               %th.col-sm-1  Delete
-  
-
   .image-upload
     %label{:for => "exercise_files"}
       %a.btn.btn-info.btn-lg{class: 'btn btn-primary'}
         %span.glyphicon.glyphicon-file
-
     = f.file_field :files, multiple: true
-
-
-
   = stylesheet_link_tag "exercise_uploader.scss"
   = javascript_include_tag 'exercise_uploader.js'
   %p 
   .row
     .col-md-9
       = f.submit class: 'btn btn-primary', value: 'Submit'
-
-

app/views/exercises/practice.html.haml

@@ -31,6 +31,9 @@
           - prompt.examples.each do |example|
             = example.display_description
             %br
+  -@fileres.each do |uniqueName, realName|
+    %p
+    =link_to "#{realName}", "/uploads/resource_file/#{uniqueName}"
 .col-md-7#user-deadline{ data: { deadline: @user_deadline, server_now: @server_now } }
   %h2 Your Answer:
   = semantic_form_for @exercise_version,