add uuid check

app/controllers/exercises_controller.rb

@@ -7,7 +7,7 @@ class ExercisesController < ApplicationController
 
   before_action :handle_file_uploads, only: [:create, :update]
   before_action :set_execution_environments, only: [:create, :edit, :new, :update]
-  before_action :set_exercise_and_authorize, only: MEMBER_ACTIONS + [:push_proforma_xml, :clone, :implement, :working_times, :intervention, :search, :run, :statistics, :submit, :reload, :feedback, :study_group_dashboard]
+  before_action :set_exercise_and_authorize, only: MEMBER_ACTIONS + [:push_proforma_xml, :clone, :implement, :working_times, :intervention, :search, :run, :statistics, :submit, :reload, :feedback, :study_group_dashboard, :export_external_check]
   before_action :set_external_user_and_authorize, only: [:statistics]
   before_action :set_file_types, only: [:create, :edit, :new, :update]
   before_action :set_course_token, only: [:implement]
@@ -119,6 +119,48 @@ class ExercisesController < ApplicationController
     end
   end
 
+  def export_external_check
+    @codeharbor_link = current_user.codeharbor_link
+    url = 'http://localhost:3001/import_uuid_check'
+
+    conn = Faraday.new(url: url) do |faraday|
+      faraday.options[:open_timeout] = 5
+      faraday.options[:timeout] = 5
+
+      faraday.adapter Faraday.default_adapter
+    end
+
+    error = false
+    response_hash = {}
+    message = ''
+    begin
+      response = conn.post do |req|
+        req.headers['Content-Type'] = 'application/json'
+        req.headers['Authorization'] = 'Bearer ' + @codeharbor_link.api_key
+        req.body = {uuid: @exercise.uuid}.to_json
+      end
+      response_hash = JSON.parse(response.body, symbolize_names: true)
+      message = response_hash[:message]
+    rescue Faraday::ClientError
+      message = 'an error occured'
+      error = true
+    end
+
+    render json: {
+      message: message,
+      actions: render_to_string(
+        partial: 'export_actions',
+        locals: {
+          exercise: @exercise,
+          exercise_found: response_hash[:exercise_found],
+          update_right: response_hash[:update_right],
+          error: error
+        }
+      )
+
+    }, status: 200
+  end
+
   def import_uuid_check
     user = user_for_oauth2_request
     return render json: {}, status: 401 if user.nil?