code.gs

var key = "xxxxx"; // for trello
var token = "xxxxx"; // for trello

function main() {
  //First get all homework assignments
  var homework = UrlFetchApp.fetch('https://byui.instructure.com/api/v1/users/self/upcoming_events?access_token=xxxxxx');
  homework = JSON.parse(homework);
  //Now create cards for each one
  homework.forEach(createCard);
}


//Currate the creation of a card. 
function createCard(assignment){  
  var label = getLabel(assignment);
  var day = getListId(assignment);
  
  var des = "";
  if(assignment.description) {
    var regex = new RegExp('<[^>]*>', 'gi');
    des = assignment.description.replace(regex,'');
  }
  
   var trelloParams = {
     name: assignment.title, // Id of the card to copy if you copy a card
     desc: des,
     due: assignment.assignment.due_at,
     idList: day,
     idLabels: label,
     key: key,
     token: token
   }
  
   var options = {
     method : 'POST',
     contentType: 'application/json',
     payload : JSON.stringify(trelloParams)
   }
  
  var url = 'https://api.trello.com/1/cards';
  var trelloResponce = UrlFetchApp.fetch(url, options);
  trelloResponce = JSON.parse(trelloResponce)
  addLink(trelloResponce.id, assignment.assignment.html_url, "Canvas");
}

//Get the label for the course based on which course it is. 
function getLabel(assignment){
  var id = assignment.context_code;
  
  if(id == "course_xxx")
    return "xxx"
  if(id == "course_xxx")
    return "xxx"
  if(id == "course_xxx")
    return "xxx"
  
}

//Add a link to a card. 
function addLink(id, link, name) {

  //Creating the data to be sent to trello
  var addLinkUrl = 'https://api.trello.com/1/cards/' + id + '/attachments?';
  
  var trelloParams = {
    name: name, // name of attachment
    url: link, // URL to attach
    key:  key,
    token: token
  };

  //JSON options
  var options = {
    method: 'POST',
    contentType: 'application/json',
    payload: JSON.stringify(trelloParams)
  };
  
  //Send attachment creation request 
  UrlFetchApp.fetch(addLinkUrl, options);
  
}


//Get the day its due and add it to that list. 
function getListId(assignment){
  var due = new Date(assignment.assignment.due_at);
  Logger.log(due.getDay());
  
  switch(due.getDay()) {
    case 0: // sunday
      return "xxx"
      break;
    case 1: // monday
      return "xxx";
      break;
    case 2: // tuesday
      return "xxx";
      break;
    case 3: // wednesday
      return "xxx";
      break;
    case 4: // thrusday
      return "xxx";
      break;
    case 5: // friday
      return "xxx";
      break;
    case 6: // satruday
      return "xxx";
      break;
    default: //inbox
      return "xxx";
  }
}