Implement the check_updates callback in the lesson module

Create a lesson with at least one page and one question. Once you have finished configuring the lesson, calculate your current timestamp. As student, complete the lesson. As admin, enable "Mobile services": Site administration ► Mobile app ► Mobile settings Create a Token in the mobile app service for the student that attempted the lesson: Click on Site administration ► Plugins ► Web services ► Manage tokens Next, you can do a CURL REST call simulating a WS client with the user. You need to replace the wstoken, courseid, the since parameter (with the timestamp you calculated), the tocheck [0] [id] with the lesson cmdi and the URL of your moodle instance curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'courseid=17&tocheck [0] [contextlevel] =module&tocheck [0] [id] =367&tocheck [0] [since] =1479575320&wsfunction=core_course_check_updates&wstoken=12a2a65aeea2a177055e233f9e303218' | python -m "json.tool" Check that you receive updates for the module: questionattempts, pagesviewed and timers, if you obtained a grade in the lesson you should receive updates for grades too. The updates include the itemids that are the ids of the records in database updated since the timestamp indicated.