get_test.js

//A simple GET request to the Canvas API, not to be used for anything real
const https = require('https');
const helper = require ('./helper.js');

var prefix = "https://canvas.instructure.com"
var access_token;
var main_call = '/api/v1/users/self/enrollments?'

var u = prefix + main_call + access_token;

function getAssignments(d) {
    var result = d;
    courses = [];
    for (var i = 0; i < result.length; i++){
        var str = result[i].html_url
        var cID = str.substring(str.lastIndexOf("courses/") + 1, str.lastIndexOf("/users"));
        cID = cID.substring(7);
        //console.log(cID);
        courses.push(cID);
    }

    for (var i = 0; i < courses.length; i++){
        url2 = prefix + "/api/v1/courses/" + courses[i] + "/assignments?per_page=50" + access_token;
        helper.httpsGetJSON(url2, printAssignments);
    }

}

function printAssignments(d) {
//var m = "";
    result = d;
    for (var j = 0; j < result.length; j++){
        var dueTime = result[j].due_at;
        if (dueTime != null && dateInFuture(dueTime)){
            console.log(result[j].name + " is due on " + parseDate(dueTime));
            //m += result[j].name + " is due on " + parseDate(dueTime) + "\n";
            //console.log(m);
        }
    }  
}

helper.httpsGetJSON(u, getAssignments);

///Returns a readable string based on a date.
//example date format: 2020-11-03T05:59:59Z
function parseDate (date){
    
    //get parts of date and time
    var year = date.substring(0, 4);
    var month = date.substring(5, 7) - 1;
    var day = date.substring(8, 10);

    var time = date.substring(11, 19);
    var hour = time.substring(0, 2);
    var minute = time.substring(3, 5);
    var second = time.substring(6);

    //create date and subtract for correct time zone
    var d = new Date(year, month, day, hour, minute, second);
    d.setHours(d.getHours() - 6);

    //console.log(d.toString());
    //console.log(year + " " + month + " " + day + " " + hour + " " + minute + " " + second + "\n");

    return d.toString();
}

///Returns true if the date input is in the future from now
function dateInFuture (date) {
    var now = new Date();

    //get parts of date and time
    var year = date.substring(0, 4);
    var month = date.substring(5, 7) - 1;
    var day = date.substring(8, 10);

    var time = date.substring(11, 19);
    var hour = time.substring(0, 2);
    var minute = time.substring(3, 5);
    var second = time.substring(6);

    //create date 
    var inputDate = new Date(year, month, day, hour, minute, second);

    //compare date
    if (inputDate > now)
        return true;
    return false;
}