Automatically update google and timetree calendars from gmail using google apps script

Code.js

function readFoodAndPutInCalendar() {
    var foods = readFoods();
    for (var i = 0; i < foods.length; i++) {
        if (isThisANewFood(foods[i])){
            putFoodInGCalendar(foods[i]);
            putFoodInTimetree(foods[i]);
        }
    }
}

function printFoodsToLog(){
    var foods = readFoods();
    Logger.log(foods);
    for (var i = 0; i < foods.length; i++) {
        Logger.log(parseFood(foods[i]));
    }
    
}

function readFoods(){
    var yoshiLabel = GmailApp.getUserLabelByName("Receipts/Yoshikei");
    var yoshiThreads = yoshiLabel.getThreads(0, 5);
    
    var yoshiThread = yoshiThreads[0];
    var foods = getFoodsFromThread(yoshiThread);
    if (! foods.length){
	yoshiThread = yoshiThreads[1];
	foods = getFoodsFromThread(yoshiThread);
    }
    return foods;
}

function getFoodsFromThread(yoshiThread){
    var messages = yoshiThread.getMessages();
    var message;
    var foods = [];
    for (var i = 0; i < messages.length; i++) {
        message = messages[i].getPlainBody();
        foods = foods.concat(getFoods(message));
    }  
    return foods;
}

function parseFoodDate(dateString){
    var miliSecsPerHour = 3600*1000;
    var date = new Date(Date.parse(dateString.substr(0, 10))+19*miliSecsPerHour);
    var endTime = new Date(date.getTime()+2*miliSecsPerHour);
    return [date, endTime];
}

function parseFoodName(foodString){
    var foodArray = foodString.replace(/\s+/g, " ").replace("：", " ").split(" ");
    var foodName = foodArray[foodArray.length - 2];
    foodName = foodName.split("（")[0]
    return foodName;
}

function parseFood(food){
    const [date, endTime] = parseFoodDate(food[0]);
    const foodName = parseFoodName(food[1]);
    return [date, endTime, foodName];
}


function getFoods(message) {
    var matches = [];
    var divideMatchString = "下記内容が、ご注文週の最終注文内容となります。";
    var n = message.search(divideMatchString);
    if (n != -1){
	message = message.substring(n);
	// This regexp matches to a date in yyyy/mm/dd format, then parenthesis with any character followed by line break
	// After that any character until line break are matched
	var matchString = "([0-9]{4}/[0-9]{2}/[0-9]{2}（.）)(.*)";
	var match = message.match(matchString);
	var i=0;
	while(match != null && i<10){
	    var dateString = match[1];
	    var foodString = match[2];
	    matches.push([dateString, foodString]);
	    message = message.substr(match.index+match[0].length);
	    match = message.match(matchString);
	    i = i + 1
	}
    }
    return matches;
}

var userProperties = PropertiesService.getUserProperties();
const oldFoodName = "old_foods";

function clearOldFoods(){
    var old_foods = [];
    userProperties.setProperty(oldFoodName, JSON.stringify(old_foods));
}


function isThisANewFood(food){
    var old_foods = userProperties.getProperty(oldFoodName);
    if (old_foods == null){
        old_foods = [];
    } else{
        old_foods = JSON.parse(old_foods)
    }
    if (old_foods.includes(food[0])){
        Logger.log("Already did this food, not doing that again")
        return false
    }else{
        Logger.log("New food!");
        old_foods.push(food[0]);
        userProperties.setProperty(oldFoodName, JSON.stringify(old_foods));
        return true
    }
}


function putFoodInGCalendar(food){
    const [date, endTime, foodName] = parseFood(food);

    var calId = "**********";
    var cal = CalendarApp.getCalendarById(calId);
    var eventsThatDay = cal.getEventsForDay(date, {search:"ヨシケイ"});
    if (eventsThatDay.length == 0) {
	cal.createEvent(foodName, date, endTime, {"description": "ヨシケイ"});
	Logger.log(date);
	Logger.log("Created event");
    } else {
        Logger.log(date);
	Logger.log("Event already exists");
    }
}

function putFoodInTimetree(food){

    const [date, endTime, foodName] = parseFood(food);
    Logger.log(date)

    var AccessToken = "**********";
    var CalendarID = "**********"
    var me_ID1 = "**********";
    var me_ID2 = "**********";
    var me = {"id":me_ID1,"type":"user"};
    var headers = {"Accept" : "application/vnd.timetree.v1+json",
                   "Authorization" : "Bearer "+AccessToken};

    var event_data = {
        "data": {
            "attributes": {
                "category": "schedule",
                "title": foodName,
                "all_day": false,
                "start_at": date.toISOString(),
                "end_at": endTime.toISOString(),
                "description": "ヨシケイ",
                "location": "Home",
                "url": "https://www2.yoshikei-dvlp.co.jp/webodr/"
            },
            "relationships": {
                "label": {
                    "data": {
                        "id": meID2,
                        "type": "label"
                    }
                },
                "attendees": {
                    "data": [
                        me
                    ]
                }
            },
        }
    };

    var event_data_str = JSON.stringify(event_data);
    headers["Content-Type"] = "application/json;"
    var options = {"method": "POST",
                   "headers": headers,
                   "payload": event_data_str,
                   "muteHttpExceptions": true};
    var response = UrlFetchApp.fetch("https://timetreeapis.com/calendars/"+CalendarID+"/events", options);
    var insertedEvent = response.getContentText();
    Logger.log(insertedEvent);
}