Google Classroom Inviter

To run this script go to script.google.com, create a new script, and paste this over the top of what is already in there

The first time you load this script you need to go to Resources -> Advanced Google Services and enable 'Google Classroom API'

You need to replace the "teacherwithclasses" and the "teachertoadd" with the appropriate teachers email addresses. Will invite the teachertoadd to the first 100 classes that teacherwithclasses teaches.

To view the output go to View -> Logs

function inviteTeacher() {
  
  var teacherwithclasses = '[email protected]';
  var teachertoadd = '[email protected]';
  
  var alreadyin = [];
  
  var optionalArgs = {
    pageSize: 100,
    teacherId: teachertoadd
  };
  var response = Classroom.Courses.list(optionalArgs);
  var courses = response.courses;
  if (courses && courses.length > 0) {
    for (i = 0; i < courses.length; i++) {
      var course = courses[i];
      alreadyin.push(course.id);
    }
  }
  var optionalArgs = {
    pageSize: 100,
    teacherId: teacherwithclasses
  };
  var response = Classroom.Courses.list(optionalArgs);
  var courses = response.courses;
  if (courses && courses.length > 0) {
    for (i = 0; i < courses.length; i++) {
      var course = courses[i];
      if(alreadyin.indexOf(course.id) == -1){
        var toadd = {
          "courseId": course.id,
          "role": "TEACHER",
          "userId": teachertoadd
        }
        Classroom.Invitations.create(toadd);
        Logger.log('%s (%s)', course.name, course.id);
      }
    }
  } else {
    Logger.log('No courses found.');
  }
}