CanvasLMSClient.gs

function CanvasLMSClient(baseURL, accessToken) {
  this.baseURL = baseURL;
  this.accessToken = accessToken
  this.getAllResources = function(resourceUrl, nextLink = null, resources = [] ) {
    const url = nextLink ? nextLink + '&access_token=' + this.accessToken : resourceUrl;
    const params = {
      method: 'get',
      muteHttpExceptions: true
    }
    const response = UrlFetchApp.fetch(url, params )
    const responseText = JSON.parse(response.getContentText())
    if (responseText.errors && responseText.errors.length > 0) throw new Error(responseText.errors[0].message)
    const headers = response.getAllHeaders()
    const links = headers['Link'] 
    ? headers['Link'].split(',').filter(link => link.includes('next'))
    : null


    if (Array.isArray(responseText)) {
      responseText.forEach(resource => {
        resources.push(resource)
      })
    } else {
      resources.push(responseText)
    }
  
    if (links && links.length > 0) {
      const nextLink = links[0].split(';')[0].replace("<", "").replace(">", "")
      return this.getAllResources(url, nextLink, resources)
    }
    
    return resources 
  }

  this.postResource = function(resourceUrl, payload){
    Logger.log(`POSTing to Canvas API at ${resourceUrl}`)
    const params = {
      method: 'post',
      muteHttpExceptions: true,
      payload: JSON.stringify(payload),
      contentType: 'application/json'
    };
    const response = UrlFetchApp.fetch(resourceUrl, params);
    Logger.log(response.getResponseCode())
    Logger.log(response)
    return JSON.parse(response);
  }

  this.deleteResource = function(resourceUrl, payload){
    Logger.log(`Deleting from Canvas API at ${resourceUrl}`)
    const params = {
      method: 'delete',
      muteHttpExceptions: true,
      payload: JSON.stringify(payload),
      contentType: 'application/json'
    };
    const response = UrlFetchApp.fetch(resourceUrl, params);
    Logger.log(response.getResponseCode())
    Logger.log(response)
    return JSON.parse(response);
  }

  this.getUser = function(userId) {
    const requestUrl = `https://${this.baseURL}/api/v1/users/${userId}?access_token=${this.accessToken}`;
    const response = this.getAllResources(requestUrl);
    if (response.length === 0) new Error('No user found with that id')
    const user = response[0];
    return user;
  }

  this.getCourseEnrollments = function(courseId){
    const requestUrl = `https://${this.baseURL}/api/v1/courses/${courseId}/enrollments?&per_page=100&access_token=${this.accessToken}`;
    const enrollments = this.getAllResources(requestUrl);
    return enrollments;
  }

  this.createEnrollmentInCourse = function(courseId, userId,  enrollmentType = 'TeacherEnrollment') {
    const requestUrl = `https://${this.baseURL}/api/v1/courses/${courseId}/enrollments?access_token=${this.accessToken}`;
    const enrollment = {user_id:userId, type: enrollmentType}
    const newCourse =  this.postResource(requestUrl, {enrollment: enrollment});
    return newCourse;
  }

  this.deleteEnrollmentFromCourse = function(courseId, enrollmentId, task = 'delete'){
    const requestUrl = `https://${this.baseURL}/api/v1/courses/${courseId}/enrollments/${enrollmentId}?access_token=${this.accessToken}`;
    const deletedEnrollment =  this.deleteResource(requestUrl, {task: task});
    return deletedEnrollment;
  } 

  this.getTerms = function(accountId){
    const requestUrl = `https://${this.baseURL}/api/v1/accounts/${accountId}/terms?&per_page=100&access_token=${this.accessToken}`;
    const terms = this.getAllResources(requestUrl);
    return terms;
  }

  this.getUserByEmail =  function(email = '[email protected]', accountId = 1){
    const requestUrl = `https://${this.baseURL}/api/v1/accounts/${accountId}/users?search_term=${email}&access_token=${this.accessToken}`;
    const response = this.getAllResources(requestUrl);
    Logger.log(response)
    if (response.length === 0) new Error('No user found with that email address')
    const user = response[0];
    return user;
  }

  this.createCourse = function(accountId = 1, course){
    const requestUrl = `https://${this.baseURL}/api/v1/accounts/${accountId}/courses?access_token=${this.accessToken}`;
    const newCourse =  this.postResource(requestUrl, {course: course});
    return newCourse;
  }

  this.getCourseDetails = function(courseId) {
  const requestUrl = `https://virginiacommonwealth.instructure.com/api/v1/courses/${courseId}?access_token=${this.accessToken}`
  const course = this.getAllResources(requestUrl);
  return course[0]
}

  return this
}