Fix error, submission, hints and help views

app/controllers/code_ocean/errors_controller.rb

@@ -0,0 +1,45 @@
+module CodeOcean
+  class ErrorsController < ApplicationController
+    before_action :set_execution_environment
+
+    def authorize!
+      authorize(@error || @errors)
+    end
+    private :authorize!
+
+    def create
+      @error = CodeOcean::Error.new(error_params)
+      authorize!
+      hint = Whistleblower.new(execution_environment: @error.execution_environment).generate_hint(@error.message)
+      respond_to do |format|
+        format.json do
+          if hint
+            render(json: {hint: hint})
+          else
+            head (@error.save ? :created : :unprocessable_entity)
+          end
+        end
+      end
+    end
+
+    def error_params
+      params[:error].permit(:message, :submission_id).merge(execution_environment_id: @execution_environment.id) if params[:error].present?
+    end
+    private :error_params
+
+    def index
+      @errors = CodeOcean::Error.for_execution_environment(@execution_environment).grouped_by_message.paginate(page: params[:page])
+      authorize!
+    end
+
+    def set_execution_environment
+      @execution_environment = ExecutionEnvironment.find(params[:execution_environment_id])
+    end
+    private :set_execution_environment
+
+    def show
+      @error = CodeOcean::Error.find(params[:id])
+      authorize!
+    end
+  end
+end