add mutations to questions and reviews

app/graphql/mutations/create_review_message.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+module Mutations
+  class CreateReviewMessage < BaseMutation
+    field :review_message, Types::ReviewMessageType, null: true
+
+    argument :message, Inputs::ReviewMessageInput, required: true
+
+    def resolve(message:)
+      message = message.to_h
+
+      ActiveRecord::Base.transaction do
+        record = ReviewMessage.create!({
+          **message,
+          user_id: current_user.id,
+        })
+
+        update_question_status(record.question, message[:feedback_type])
+        update_review_requests(record.question, message[:feedback_type])
+
+        { review_message: record, errors: [] }
+      rescue ActiveRecord::RecordInvalid => e
+        { review_message: nil, errors: e.record.errors.full_messages }
+      end
+    rescue Pundit::NotAuthorizedError => e
+      { review_message: nil, errors: [e.message] }
+    end
+
+    private
+
+    def update_question_status(question, feedback_type)
+      new_question_status = case feedback_type
+      when "request_changes"
+        "with_requested_changes"
+      when "approve"
+        "approved"
+      when "answer"
+        "waiting_review"
+      end
+
+      question.update!(status: new_question_status)
+    end
+
+    def update_review_requests(question, feedback_type)
+      return question.review_requests.update_all(answered: false) if feedback_type == "answer"
+
+      question
+        .review_requests
+        .where(user_id: current_user.id)
+        .update_all(answered: question.user_id != current_user.id)
+    end
+  end
+end