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Helpers.gs
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/**
* Takes an intended frequency in minutes and adjusts it to be the closest
* acceptable value to use Google "everyMinutes" trigger setting (i.e. one of
* the following values: 1, 5, 10, 15, 30).
*
* @param {?integer} The manually set frequency that the user intends to set.
* @return {integer} The closest valid value to the intended frequency setting. Defaulting to 15 if no valid input is provided.
*/
function getValidTriggerFrequency(origFrequency) {
if (!origFrequency > 0) {
Logger.log("No valid frequency specified. Defaulting to 15 minutes.");
return 15;
}
var adjFrequency = Math.round(origFrequency / 5) * 5; // Set the number to be the closest divisible-by-5
adjFrequency = Math.max(adjFrequency, 1); // Make sure the number is at least 1 (0 is not valid for the trigger)
adjFrequency = Math.min(adjFrequency, 15); // Make sure the number is at most 15 (will check for the 30 value below)
if (
adjFrequency == 15 &&
Math.abs(origFrequency - 30) < Math.abs(origFrequency - 15)
)
adjFrequency = 30; // If we adjusted to 15, but the original number is actually closer to 30, set it to 30 instead
Logger.log(
"Intended frequency = " +
origFrequency +
", Adjusted frequency = " +
adjFrequency
);
return adjFrequency;
}
String.prototype.includes = function (phrase) {
return this.indexOf(phrase) > -1;
};
/**
* Takes an array of ICS calendars and target Google calendars and combines them
*
* @param {Array.string} calendarMap - User-defined calendar map
* @return {Array.string} Condensed calendar map
*/
function condenseCalendarMap(calendarMap) {
var result = [];
for (var mapping of calendarMap) {
var index = -1;
for (var i = 0; i < result.length; i++) {
if (result[i][0] == mapping[1]) {
index = i;
break;
}
}
if (index > -1) result[index][1].push([mapping[0], mapping[2]]);
else result.push([mapping[1], [[mapping[0], mapping[2]]]]);
}
return result;
}
/**
* Removes all triggers for the script's 'startSync' and 'install' function.
*/
function deleteAllTriggers() {
var triggers = ScriptApp.getProjectTriggers();
for (var i = 0; i < triggers.length; i++) {
if (
["startSync", "install", "main", "checkForUpdate"].includes(
triggers[i].getHandlerFunction()
)
) {
ScriptApp.deleteTrigger(triggers[i]);
}
}
}
/**
* Gets the ressource from the specified URLs.
*
* @param {Array.string} sourceCalendarURLs - Array with URLs to fetch
* @return {Array.string} The ressources fetched from the specified URLs
*/
function fetchSourceCalendars(sourceCalendarURLs) {
var result = [];
for (var source of sourceCalendarURLs) {
var url = source[0].replace("webcal://", "https://");
var colorId = source[1];
callWithBackoff(function () {
var urlResponse = UrlFetchApp.fetch(url, {
validateHttpsCertificates: false,
muteHttpExceptions: true,
});
if (urlResponse.getResponseCode() == 200) {
var urlContent = RegExp("(BEGIN:VCALENDAR.*?END:VCALENDAR)", "s").exec(
urlResponse.getContentText()
);
if (urlContent == null) {
Logger.log("[ERROR] Incorrect ics/ical URL: " + url);
return;
} else {
result.push([urlContent[0], colorId]);
return;
}
} else {
//Throw here to make callWithBackoff run again
throw (
"Error: Encountered HTTP error " +
urlResponse.getResponseCode() +
" when accessing " +
url
);
}
}, defaultMaxRetries);
}
return result;
}
/**
* Gets the user's Google Calendar with the specified name.
* A new Calendar will be created if the user does not have a Calendar with the specified name.
*
* @param {string} targetCalendarName - The name of the calendar to return
* @return {Calendar} The calendar retrieved or created
*/
function setupTargetCalendar(targetCalendarName) {
var targetCalendar = Calendar.CalendarList.list({
showHidden: true,
maxResults: 250,
}).items.filter(function (cal) {
return (
(cal.summaryOverride || cal.summary) == targetCalendarName &&
(cal.accessRole == "owner" || cal.accessRole == "writer")
);
})[0];
if (targetCalendar == null) {
Logger.log("Creating Calendar: " + targetCalendarName);
targetCalendar = Calendar.newCalendar();
targetCalendar.summary = targetCalendarName;
targetCalendar.description = "Created by GAS";
targetCalendar.timeZone = Calendar.Settings.get("timezone").value;
targetCalendar = Calendar.Calendars.insert(targetCalendar);
}
return targetCalendar;
}
/**
* Parses all sources using ical.js.
* Registers all found timezones with TimezoneService.
* Creates an Array with all events and adds the event-ids to the provided Array.
*
* @param {Array.string} responses - Array with all ical sources
* @return {Array.ICALComponent} Array with all events found
*/
function parseResponses(responses) {
var result = [];
for (var itm of responses) {
var resp = itm[0];
var colorId = itm[1];
var jcalData = ICAL.parse(resp);
var component = new ICAL.Component(jcalData);
ICAL.helpers.updateTimezones(component);
var vtimezones = component.getAllSubcomponents("vtimezone");
for (var tz of vtimezones) {
ICAL.TimezoneService.register(tz);
}
var allEvents = component.getAllSubcomponents("vevent");
if (colorId != undefined)
allEvents.forEach(function (event) {
event.addPropertyWithValue("color", colorId);
});
var calName =
component.getFirstPropertyValue("x-wr-calname") ||
component.getFirstPropertyValue("name");
if (calName != null)
allEvents.forEach(function (event) {
event.addPropertyWithValue("parentCal", calName);
});
result = [].concat(allEvents, result);
}
if (config.onlyFutureEvents) {
result = result.filter(function (event) {
try {
if (
event.hasProperty("recurrence-id") ||
event.hasProperty("rrule") ||
event.hasProperty("rdate") ||
event.hasProperty("exdate")
) {
//Keep recurrences to properly filter them later on
return true;
}
var eventEnde;
eventEnde = new ICAL.Time.fromString(
event.getFirstPropertyValue("dtend").toString(),
event.getFirstProperty("dtend")
);
return eventEnde.compare(startUpdateTime) >= 0;
} catch (e) {
return true;
}
});
}
//No need to process calcelled events as they will be added to gcal's trash anyway
result = result.filter(function (event) {
try {
return (
event.getFirstPropertyValue("status").toString().toLowerCase() !=
"cancelled"
);
} catch (e) {
return true;
}
});
result.forEach(function (event) {
if (!event.hasProperty("uid")) {
event.updatePropertyWithValue(
"uid",
Utilities.computeDigest(
Utilities.DigestAlgorithm.MD5,
event.toString()
).toString()
);
}
if (event.hasProperty("recurrence-id")) {
var recID = new ICAL.Time.fromString(
event.getFirstPropertyValue("recurrence-id").toString(),
event.getFirstProperty("recurrence-id")
);
var recUTC = recID
.convertToZone(ICAL.TimezoneService.get("UTC"))
.toString();
icsEventsIds.push(
event.getFirstPropertyValue("uid").toString() + "_" + recUTC
);
} else {
icsEventsIds.push(event.getFirstPropertyValue("uid").toString());
}
});
return result;
}
/**
* Creates a Google Calendar event and inserts it to the target calendar.
*
* @param {ICAL.Component} event - The event to process
* @param {string} calendarTz - The timezone of the target calendar
*/
function processEvent(event, calendarTz) {
//------------------------ Create the event object ------------------------
var newEvent = createEvent(event, calendarTz);
if (newEvent == null) return;
var index = calendarEventsIds.indexOf(
newEvent.extendedProperties.private["id"]
);
var needsUpdate = index > -1;
//------------------------ Save instance overrides ------------------------
//----------- To make sure the parent event is actually created -----------
if (event.hasProperty("recurrence-id")) {
Logger.log("Saving event instance for later: " + newEvent.recurringEventId);
recurringEvents.push(newEvent);
return;
} else {
//------------------------ Send event object to gcal ------------------------
if (needsUpdate) {
if (config.modifyExistingEvents) {
Logger.log(`Updating existing event => ${newEvent.summary}`);
newEvent = callWithBackoff(function () {
return Calendar.Events.update(
newEvent,
targetCalendarId,
calendarEvents[index].id
);
}, defaultMaxRetries);
if (newEvent != null && emailSummary) {
modifiedEvents.push([
[newEvent.summary, newEvent.start.date || newEvent.start.dateTime],
targetCalendarName,
]);
}
}
} else {
if (config.addEventsToCalendar) {
Logger.log(`Adding new event => ${newEvent.summary}`);
newEvent = callWithBackoff(function () {
return Calendar.Events.insert(newEvent, targetCalendarId);
}, defaultMaxRetries);
if (newEvent != null && emailSummary) {
addedEvents.push([
[newEvent.summary, newEvent.start.date || newEvent.start.dateTime],
targetCalendarName,
]);
}
}
}
}
}
/**
* Creates a Google Calendar Event based on the specified ICALEvent.
* Will return null if the event has not changed since the last sync.
* If onlyFutureEvents is set to true:
* -It will return null if the event has already taken place.
* -Past instances of recurring events will be removed
*
* @param {ICAL.Component} event - The event to process
* @param {string} calendarTz - The timezone of the target calendar
* @return {?Calendar.Event} The Calendar.Event that will be added to the target calendar
*/
function createEvent(event, calendarTz) {
event.removeProperty("dtstamp");
var icalEvent = new ICAL.Event(event, { strictExceptions: true });
const diffStart = Math.floor(
(icalEvent.startDate.toJSDate() - new Date()) / (1000 * 60 * 60 * 24)
);
const diffEnd = Math.floor(
(icalEvent.endDate.toJSDate() - new Date()) / (1000 * 60 * 60 * 24)
);
if (diffStart > futureDaysToSync) {
Logger.log(
`Ignoring ${diffStart} days future event => ${icalEvent.summary}`
);
return;
}
if (diffEnd < -1 * pastDaysToSync) {
Logger.log(
`Ignoring ${Math.abs(diffEnd)} days past event => ${icalEvent.summary}`
);
return;
}
if (icalEvent.summary.startsWith("Canceled: ")) {
Logger.log("Ignoring canceled event => " + icalEvent.summary);
return;
}
if (config.onlyFutureEvents && checkSkipEvent(event, icalEvent)) {
return;
}
var digest = Utilities.computeDigest(
Utilities.DigestAlgorithm.MD5,
icalEvent.toString()
).toString();
if (calendarEventsMD5s.indexOf(digest) >= 0) {
Logger.log(
"Skipping unchanged Event " +
event.getFirstPropertyValue("uid").toString()
);
return;
}
var newEvent = callWithBackoff(function () {
return Calendar.newEvent();
}, defaultMaxRetries);
if (icalEvent.startDate.isDate) {
//All-day event
if (icalEvent.startDate.compare(icalEvent.endDate) == 0) {
//Adjust dtend in case dtstart equals dtend as this is not valid for allday events
icalEvent.endDate = icalEvent.endDate.adjust(1, 0, 0, 0);
}
newEvent = {
start: { date: icalEvent.startDate.toString() },
end: { date: icalEvent.endDate.toString() },
};
} else {
//Normal (not all-day) event
var tzid = icalEvent.startDate.timezone;
if (tzids.indexOf(tzid) == -1) {
var oldTzid = tzid;
if (tzid in tzidreplace) {
tzid = tzidreplace[tzid];
} else {
//floating time
tzid = calendarTz;
}
Logger.log(
"Converting ICS timezone " +
oldTzid +
" to Google Calendar (IANA) timezone " +
tzid
);
}
newEvent = {
start: {
dateTime: icalEvent.startDate.toString(),
timeZone: tzid,
},
end: {
dateTime: icalEvent.endDate.toString(),
timeZone: tzid,
},
};
}
if (addAttendees && event.hasProperty("attendee")) {
newEvent.attendees = [];
for (var att of icalEvent.attendees) {
var mail = parseAttendeeMail(att.toICALString());
if (mail != null) {
var newAttendee = { email: mail };
var name = parseAttendeeName(att.toICALString());
if (name != null) newAttendee["displayName"] = name;
var resp = parseAttendeeResp(att.toICALString());
if (resp != null) newAttendee["responseStatus"] = resp;
newEvent.attendees.push(newAttendee);
}
}
}
if (event.hasProperty("status")) {
var status = event.getFirstPropertyValue("status").toString().toLowerCase();
if (["confirmed", "tentative", "cancelled"].indexOf(status) > -1)
newEvent.status = status;
}
if (
event.hasProperty("url") &&
event.getFirstPropertyValue("url").toString().substring(0, 4) == "http"
) {
newEvent.source = callWithBackoff(function () {
return Calendar.newEventSource();
}, defaultMaxRetries);
newEvent.source.url = event.getFirstPropertyValue("url").toString();
newEvent.source.title = "link";
}
if (event.hasProperty("sequence")) {
//newEvent.sequence = icalEvent.sequence; Currently disabled as it is causing issues with recurrence exceptions
}
if (descriptionAsTitles && event.hasProperty("description"))
newEvent.summary = icalEvent.description;
else if (event.hasProperty("summary")) newEvent.summary = icalEvent.summary;
if (event.hasProperty("organizer")) {
var organizerName = event.getFirstProperty("organizer").getParameter("cn");
var organizerMail = event
.getFirstProperty("organizer")
.getParameter("mailto");
newEvent.organizer = callWithBackoff(function () {
return Calendar.newEventOrganizer();
}, defaultMaxRetries);
if (organizerName)
newEvent.organizer.displayName = organizerName.toString();
if (organizerMail) newEvent.organizer.email = organizerMail.toString();
if (addOrganizerToTitle && organizerName) {
newEvent.summary = organizerName + ": " + newEvent.summary;
}
}
if (addCalToTitle && event.hasProperty("parentCal")) {
var calName = event.getFirstPropertyValue("parentCal");
newEvent.summary = "(" + calName + ") " + newEvent.summary;
}
if (event.hasProperty("description"))
newEvent.description = icalEvent.description;
if (event.hasProperty("location")) newEvent.location = icalEvent.location;
var validVisibilityValues = ["default", "public", "private", "confidential"];
if (validVisibilityValues.includes(overrideVisibility.toLowerCase())) {
newEvent.visibility = overrideVisibility.toLowerCase();
} else if (event.hasProperty("class")) {
var classString = event
.getFirstPropertyValue("class")
.toString()
.toLowerCase();
if (validVisibilityValues.includes(classString))
newEvent.visibility = classString;
}
if (event.hasProperty("transp")) {
var transparency = event
.getFirstPropertyValue("transp")
.toString()
.toLowerCase();
if (["opaque", "transparent"].indexOf(transparency) > -1)
newEvent.transparency = transparency;
}
if (icalEvent.startDate.isDate) {
if (0 <= defaultAllDayReminder && defaultAllDayReminder <= 40320) {
newEvent.reminders = {
useDefault: false,
overrides: [{ method: "popup", minutes: defaultAllDayReminder }],
}; //reminder as defined by the user
} else {
newEvent.reminders = { useDefault: false, overrides: [] }; //no reminder
}
} else {
newEvent.reminders = { useDefault: true, overrides: [] }; //will set the default reminders as set at calendar.google.com
}
switch (addAlerts) {
case "yes":
var valarms = event.getAllSubcomponents("valarm");
if (valarms.length > 0) {
var overrides = [];
for (var valarm of valarms) {
var trigger = valarm.getFirstPropertyValue("trigger").toString();
try {
var alarmTime = new ICAL.Time.fromString(trigger);
trigger = alarmTime.subtractDateTz(icalEvent.startDate).toString();
} catch (e) {}
if (overrides.length < 5) {
//Google supports max 5 reminder-overrides
var timer = parseNotificationTime(trigger);
if (0 <= timer && timer <= 40320)
overrides.push({ method: "popup", minutes: timer });
}
}
if (overrides.length > 0) {
newEvent.reminders = {
useDefault: false,
overrides: overrides,
};
}
}
break;
case "no":
newEvent.reminders = {
useDefault: false,
overrides: [],
};
break;
default:
case "default":
newEvent.reminders = {
useDefault: true,
overrides: [],
};
break;
}
if (icalEvent.isRecurring()) {
// Calculate targetTZ's UTC-Offset
var calendarUTCOffset = 0;
var jsTime = new Date();
var utcTime = new Date(
Utilities.formatDate(jsTime, "Etc/GMT", "HH:mm:ss MM/dd/yyyy")
);
var tgtTime = new Date(
Utilities.formatDate(jsTime, calendarTz, "HH:mm:ss MM/dd/yyyy")
);
calendarUTCOffset = tgtTime - utcTime;
newEvent.recurrence = parseRecurrenceRule(event, calendarUTCOffset);
}
newEvent.extendedProperties = {
private: { MD5: digest, fromGAS: "true", id: icalEvent.uid },
};
if (event.hasProperty("recurrence-id")) {
var recID = new ICAL.Time.fromString(
event.getFirstPropertyValue("recurrence-id").toString(),
event.getFirstProperty("recurrence-id")
);
newEvent.recurringEventId = recID
.convertToZone(ICAL.TimezoneService.get("UTC"))
.toString();
newEvent.extendedProperties.private["rec-id"] =
newEvent.extendedProperties.private["id"] +
"_" +
newEvent.recurringEventId;
}
if (event.hasProperty("color")) {
newEvent.colorId = event.getFirstPropertyValue("color").toString();
}
return newEvent;
}
/**
* Checks if the provided event has taken place in the past.
* Removes all past instances of the provided icalEvent object.
*
* @param {ICAL.Component} event - The event to process
* @param {ICAL.Event} icalEvent - The event to process as ICAL.Event object
* @return {boolean} Wether it's a past event or not
*/
function checkSkipEvent(event, icalEvent) {
if (icalEvent.isRecurrenceException()) {
if (
icalEvent.startDate.compare(startUpdateTime) < 0 &&
icalEvent.recurrenceId.compare(startUpdateTime) < 0
) {
Logger.log("Skipping past recurrence exception");
return true;
}
} else if (icalEvent.isRecurring()) {
var skip = false; //Indicates if the recurring event and all its instances are in the past
if (icalEvent.endDate.compare(startUpdateTime) < 0) {
//Parenting recurring event is in the past
var dtstart = event.getFirstPropertyValue("dtstart");
var expand = new ICAL.RecurExpansion({
component: event,
dtstart: dtstart,
});
var next;
var newStartDate;
var countskipped = 0;
while ((next = expand.next())) {
var diff = next.subtractDate(icalEvent.startDate);
var tempEnd = icalEvent.endDate.clone();
tempEnd.addDuration(diff);
if (tempEnd.compare(startUpdateTime) < 0) {
countskipped++;
continue;
}
newStartDate = next;
break;
}
if (newStartDate != null) {
//At least one instance is in the future
newStartDate.timezone = icalEvent.startDate.timezone;
var diff = newStartDate.subtractDate(icalEvent.startDate);
icalEvent.endDate.addDuration(diff);
var newEndDate = icalEvent.endDate;
icalEvent.endDate = newEndDate;
icalEvent.startDate = newStartDate;
var rrule = event.getFirstProperty("rrule");
var recur = rrule.getFirstValue();
if (recur.isByCount()) {
recur.count -= countskipped;
rrule.setValue(recur);
}
var exDates = event.getAllProperties("exdate");
exDates.forEach(function (e) {
var ex = new ICAL.Time.fromString(e.getFirstValue().toString());
if (ex < newStartDate) {
event.removeProperty(e);
}
});
var rdates = event.getAllProperties("rdate");
rdates.forEach(function (r) {
var vals = r.getValues();
vals = vals.filter(function (v) {
var valTime = new ICAL.Time.fromString(v.toString(), r);
return (
valTime.compare(startUpdateTime) >= 0 &&
valTime.compare(icalEvent.startDate) > 0
);
});
if (vals.length == 0) {
event.removeProperty(r);
} else if (vals.length == 1) {
r.setValue(vals[0]);
} else if (vals.length > 1) {
r.setValues(vals);
}
});
Logger.log(
`Adjusted RRule/RDate to exclude past instances for ${icalEvent.summary}`
);
} else {
//All instances are in the past
skip = true;
}
}
//Check and filter recurrence-exceptions
for (i = 0; i < icalEvent.except.length; i++) {
//Exclude the instance if it was moved from future to past
if (
icalEvent.except[i].startDate.compare(startUpdateTime) < 0 &&
icalEvent.except[i].recurrenceId.compare(startUpdateTime) >= 0
) {
Logger.log(
"Creating EXDATE for exception at " +
icalEvent.except[i].recurrenceId.toString()
);
icalEvent.component.addPropertyWithValue(
"exdate",
icalEvent.except[i].recurrenceId.toString()
);
} //Re-add the instance if it is moved from past to future
else if (
icalEvent.except[i].startDate.compare(startUpdateTime) >= 0 &&
icalEvent.except[i].recurrenceId.compare(startUpdateTime) < 0
) {
Logger.log(
"Creating RDATE for exception at " +
icalEvent.except[i].recurrenceId.toString()
);
icalEvent.component.addPropertyWithValue(
"rdate",
icalEvent.except[i].recurrenceId.toString()
);
skip = false;
}
}
if (skip) {
//Completely remove the event as all instances of it are in the past
icsEventsIds.splice(
icsEventsIds.indexOf(event.getFirstPropertyValue("uid").toString()),
1
);
Logger.log("Skipping past recurring event " + icalEvent.summary);
return true;
}
} else {
//normal events
if (icalEvent.endDate.compare(startUpdateTime) < 0) {
icsEventsIds.splice(
icsEventsIds.indexOf(event.getFirstPropertyValue("uid").toString()),
1
);
Logger.log("Skipping previous event " + icalEvent.summary);
return true;
}
}
return false;
}
/**
* Patches an existing event instance with the provided Calendar.Event.
* The instance that needs to be updated is identified by the recurrence-id of the provided event.
*
* @param {Calendar.Event} recEvent - The event instance to process
*/
function processEventInstance(recEvent) {
Logger.log(
"ID: " +
recEvent.extendedProperties.private["id"] +
" | Date: " +
recEvent.recurringEventId
);
var eventInstanceToPatch = callWithBackoff(function () {
return Calendar.Events.list(targetCalendarId, {
singleEvents: true,
privateExtendedProperty: "fromGAS=true",
privateExtendedProperty:
"rec-id=" +
recEvent.extendedProperties.private["id"] +
"_" +
recEvent.recurringEventId,
}).items;
}, defaultMaxRetries);
if (eventInstanceToPatch == null || eventInstanceToPatch.length == 0) {
if (recEvent.recurringEventId.length == 10) {
recEvent.recurringEventId += "T00:00:00Z";
} else if (recEvent.recurringEventId.substr(-1) !== "Z") {
recEvent.recurringEventId += "Z";
}
eventInstanceToPatch = callWithBackoff(function () {
return Calendar.Events.list(targetCalendarId, {
singleEvents: true,
orderBy: "startTime",
maxResults: 1,
timeMin: recEvent.recurringEventId,
privateExtendedProperty: "fromGAS=true",
privateExtendedProperty:
"id=" + recEvent.extendedProperties.private["id"],
}).items;
}, defaultMaxRetries);
}
if (eventInstanceToPatch !== null && eventInstanceToPatch.length == 1) {
Logger.log("Updating existing event instance");
callWithBackoff(function () {
Calendar.Events.update(
recEvent,
targetCalendarId,
eventInstanceToPatch[0].id
);
}, defaultMaxRetries);
} else {
Logger.log("No Instance matched, adding as new event!");
callWithBackoff(function () {
Calendar.Events.insert(recEvent, targetCalendarId);
}, defaultMaxRetries);
}
}
/**
* Deletes all events from the target calendar that no longer exist in the source calendars.
* If onlyFutureEvents is set to true, events that have taken place since the last sync are also removed.
*/
function processEventCleanup() {
for (var i = 0; i < calendarEvents.length; i++) {
var currentID = calendarEventsIds[i];
var feedIndex = icsEventsIds.indexOf(currentID);
if (feedIndex == -1 && calendarEvents[i].recurringEventId == null) {
Logger.log(`Deleting old event => ${calendarEvents[i].summary}`);
callWithBackoff(function () {
Calendar.Events.remove(targetCalendarId, calendarEvents[i].id);
}, defaultMaxRetries);
if (emailSummary) {
removedEvents.push([
[
calendarEvents[i].summary,
calendarEvents[i].start.date || calendarEvents[i].start.dateTime,
],
targetCalendarName,
]);
}
}
}
}
/**
* Processes and adds all vtodo components as Tasks to the user's Google Account
*
* @param {Array.string} responses - Array with all ical sources
*/
function processTasks(responses) {
var taskLists = Tasks.Tasklists.list().items;
var taskList = taskLists[0];
var existingTasks = Tasks.Tasks.list(taskList.id).items || [];
var existingTasksIds = [];
Logger.log(
"Fetched " + existingTasks.length + " existing tasks from " + taskList.title
);
for (var i = 0; i < existingTasks.length; i++) {
existingTasksIds[i] = existingTasks[i].id;
}
var icsTasksIds = [];
var vtasks = [];
for (var resp of responses) {
var jcalData = ICAL.parse(resp);
var component = new ICAL.Component(jcalData);
vtasks = [].concat(component.getAllSubcomponents("vtodo"), vtasks);
}
vtasks.forEach(function (task) {
icsTasksIds.push(task.getFirstPropertyValue("uid").toString());
});
Logger.log("\tProcessing " + vtasks.length + " tasks");
for (var task of vtasks) {
var newtask = Tasks.newTask();
newtask.id = task.getFirstPropertyValue("uid").toString();
newtask.title = task.getFirstPropertyValue("summary").toString();
var dueDate = task.getFirstPropertyValue("due").toJSDate();
newtask.due =
dueDate.getFullYear() +
"-" +
("0" + (dueDate.getMonth() + 1)).slice(-2) +
"-" +
("0" + dueDate.getDate()).slice(-2) +
"T" +
("0" + dueDate.getHours()).slice(-2) +
":" +
("0" + dueDate.getMinutes()).slice(-2) +
":" +
("0" + dueDate.getSeconds()).slice(-2) +
"Z";
Tasks.Tasks.insert(newtask, taskList.id);
}
Logger.log("\tDone processing tasks");
//-------------- Remove old Tasks -----------
// ID can't be used as identifier as the API reassignes a random id at task creation
if (config.removeEventsFromCalendar) {
Logger.log("Checking " + existingTasksIds.length + " tasks for removal");
for (var i = 0; i < existingTasksIds.length; i++) {
var currentID = existingTasks[i].id;
var feedIndex = icsTasksIds.indexOf(currentID);
if (feedIndex == -1) {
Logger.log("Deleting old task " + currentID);
Tasks.Tasks.remove(taskList.id, currentID);
}
}
Logger.log("Done removing tasks");
}
//----------------------------------------------------------------
}
/**
* Parses the provided ICAL.Component to find all recurrence rules.
*
* @param {ICAL.Component} vevent - The event to parse
* @param {number} utcOffset - utc offset of the target calendar
* @return {Array.String} Array with all recurrence components found in the provided event
*/
function parseRecurrenceRule(vevent, utcOffset) {
var recurrenceRules = vevent.getAllProperties("rrule");
var exRules = vevent.getAllProperties("exrule"); //deprecated, for compatibility only
var exDates = vevent.getAllProperties("exdate");
var rDates = vevent.getAllProperties("rdate");
var recurrence = [];
for (var recRule of recurrenceRules) {
var recIcal = recRule.toICALString();
var adjustedTime;
var untilMatch = RegExp(
"(.*)(UNTIL=)(\\d\\d\\d\\d)(\\d\\d)(\\d\\d)T(\\d\\d)(\\d\\d)(\\d\\d)(;.*|\\b)",
"g"
).exec(recIcal);
if (untilMatch != null) {
adjustedTime = new Date(
Date.UTC(
parseInt(untilMatch[3], 10),
parseInt(untilMatch[4], 10) - 1,
parseInt(untilMatch[5], 10),
parseInt(untilMatch[6], 10),
parseInt(untilMatch[7], 10),
parseInt(untilMatch[8], 10)
)
);
adjustedTime = Utilities.formatDate(
new Date(adjustedTime - utcOffset),
"etc/GMT",
"YYYYMMdd'T'HHmmss'Z'"
);
recIcal = untilMatch[1] + untilMatch[2] + adjustedTime + untilMatch[9];
}
recurrence.push(recIcal);
}
for (var exRule of exRules) {
recurrence.push(exRule.toICALString());
}
for (var exDate of exDates) {
recurrence.push(exDate.toICALString());
}
for (var rDate of rDates) {
recurrence.push(rDate.toICALString());
}
return recurrence;
}
/**
* Parses the provided string to find the name of an Attendee.
* Will return null if no name is found.
*
* @param {string} veventString - The string to parse
* @return {?String} The Attendee's name found in the string, null if no name was found
*/
function parseAttendeeName(veventString) {
var nameMatch = RegExp("(cn=)([^;$:]*)", "gi").exec(veventString);
if (nameMatch != null && nameMatch.length > 1) return nameMatch[2];
else return null;
}
/**
* Parses the provided string to find the mail adress of an Attendee.
* Will return null if no mail adress is found.
*
* @param {string} veventString - The string to parse
* @return {?String} The Attendee's mail adress found in the string, null if nothing was found
*/
function parseAttendeeMail(veventString) {
var mailMatch = RegExp("(:mailto:)([^;$:]*)", "gi").exec(veventString);
if (mailMatch != null && mailMatch.length > 1) return mailMatch[2];
else return null;
}
/**