icalendar.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/



dojo.provide("dojo.cal.iCalendar");
dojo.require("dojo.lang.common");
dojo.require("dojo.cal.textDirectory");
dojo.require("dojo.date.common");
dojo.require("dojo.date.serialize");
dojo.cal.iCalendar.fromText = function (text) {
	var properties = dojo.cal.textDirectory.tokenise(text);
	var calendars = [];
	for (var i = 0, begun = false; i < properties.length; i++) {
		var prop = properties[i];
		if (!begun) {
			if (prop.name == "BEGIN" && prop.value == "VCALENDAR") {
				begun = true;
				var calbody = [];
			}
		} else {
			if (prop.name == "END" && prop.value == "VCALENDAR") {
				calendars.push(new dojo.cal.iCalendar.VCalendar(calbody));
				begun = false;
			} else {
				calbody.push(prop);
			}
		}
	}
	return calendars;
};
dojo.cal.iCalendar.Component = function (body) {
	if (!this.name) {
		this.name = "COMPONENT";
	}
	this.properties = [];
	this.components = [];
	if (body) {
		for (var i = 0, context = ""; i < body.length; i++) {
			if (context == "") {
				if (body[i].name == "BEGIN") {
					context = body[i].value;
					var childprops = [];
				} else {
					this.addProperty(new dojo.cal.iCalendar.Property(body[i]));
				}
			} else {
				if (body[i].name == "END" && body[i].value == context) {
					if (context == "VEVENT") {
						this.addComponent(new dojo.cal.iCalendar.VEvent(childprops));
					} else {
						if (context == "VTIMEZONE") {
							this.addComponent(new dojo.cal.iCalendar.VTimeZone(childprops));
						} else {
							if (context == "VTODO") {
								this.addComponent(new dojo.cal.iCalendar.VTodo(childprops));
							} else {
								if (context == "VJOURNAL") {
									this.addComponent(new dojo.cal.iCalendar.VJournal(childprops));
								} else {
									if (context == "VFREEBUSY") {
										this.addComponent(new dojo.cal.iCalendar.VFreeBusy(childprops));
									} else {
										if (context == "STANDARD") {
											this.addComponent(new dojo.cal.iCalendar.Standard(childprops));
										} else {
											if (context == "DAYLIGHT") {
												this.addComponent(new dojo.cal.iCalendar.Daylight(childprops));
											} else {
												if (context == "VALARM") {
													this.addComponent(new dojo.cal.iCalendar.VAlarm(childprops));
												} else {
													dojo.unimplemented("dojo.cal.iCalendar." + context);
												}
											}
										}
									}
								}
							}
						}
					}
					context = "";
				} else {
					childprops.push(body[i]);
				}
			}
		}
		if (this._ValidProperties) {
			this.postCreate();
		}
	}
};
dojo.extend(dojo.cal.iCalendar.Component, {addProperty:function (prop) {
	this.properties.push(prop);
	this[prop.name.toLowerCase()] = prop;
}, addComponent:function (prop) {
	this.components.push(prop);
}, postCreate:function () {
	for (var x = 0; x < this._ValidProperties.length; x++) {
		var evtProperty = this._ValidProperties[x];
		var found = false;
		for (var y = 0; y < this.properties.length; y++) {
			var prop = this.properties[y];
			var propName = prop.name.toLowerCase();
			if (dojo.lang.isArray(evtProperty)) {
				var alreadySet = false;
				for (var z = 0; z < evtProperty.length; z++) {
					var evtPropertyName = evtProperty[z].name.toLowerCase();
					if ((this[evtPropertyName]) && (evtPropertyName != propName)) {
						alreadySet = true;
					}
				}
				if (!alreadySet) {
					this[propName] = prop;
				}
			} else {
				if (propName == evtProperty.name.toLowerCase()) {
					found = true;
					if (evtProperty.occurance == 1) {
						this[propName] = prop;
					} else {
						found = true;
						if (!dojo.lang.isArray(this[propName])) {
							this[propName] = [];
						}
						this[propName].push(prop);
					}
				}
			}
		}
		if (evtProperty.required && !found) {
			dojo.debug("iCalendar - " + this.name + ": Required Property not found: " + evtProperty.name);
		}
	}
	if (dojo.lang.isArray(this.rrule)) {
		for (var x = 0; x < this.rrule.length; x++) {
			var rule = this.rrule[x].value;
			this.rrule[x].cache = function () {
			};
			var temp = rule.split(";");
			for (var y = 0; y < temp.length; y++) {
				var pair = temp[y].split("=");
				var key = pair[0].toLowerCase();
				var val = pair[1];
				if ((key == "freq") || (key == "interval") || (key == "until")) {
					this.rrule[x][key] = val;
				} else {
					var valArray = val.split(",");
					this.rrule[x][key] = valArray;
				}
			}
		}
		this.recurring = true;
	}
}, toString:function () {
	return "[iCalendar.Component; " + this.name + ", " + this.properties.length + " properties, " + this.components.length + " components]";
}});
dojo.cal.iCalendar.Property = function (prop) {
	this.name = prop.name;
	this.group = prop.group;
	this.params = prop.params;
	this.value = prop.value;
};
dojo.extend(dojo.cal.iCalendar.Property, {toString:function () {
	return "[iCalenday.Property; " + this.name + ": " + this.value + "]";
}});
var _P = function (n, oc, req) {
	return {name:n, required:(req) ? true : false, occurance:(oc == "*" || !oc) ? -1 : oc};
};
dojo.cal.iCalendar.VCalendar = function (calbody) {
	this.name = "VCALENDAR";
	this.recurring = [];
	this.nonRecurringEvents = function () {
	};
	dojo.cal.iCalendar.Component.call(this, calbody);
};
dojo.inherits(dojo.cal.iCalendar.VCalendar, dojo.cal.iCalendar.Component);
dojo.extend(dojo.cal.iCalendar.VCalendar, {addComponent:function (prop) {
	this.components.push(prop);
	if (prop.name.toLowerCase() == "vevent") {
		if (prop.rrule) {
			this.recurring.push(prop);
		} else {
			var startDate = prop.getDate();
			var month = startDate.getMonth() + 1;
			var dateString = month + "-" + startDate.getDate() + "-" + startDate.getFullYear();
			if (!dojo.lang.isArray(this[dateString])) {
				this.nonRecurringEvents[dateString] = [];
			}
			this.nonRecurringEvents[dateString].push(prop);
		}
	}
}, preComputeRecurringEvents:function (until) {
	var calculatedEvents = function () {
	};
	for (var x = 0; x < this.recurring.length; x++) {
		var dates = this.recurring[x].getDates(until);
		for (var y = 0; y < dates.length; y++) {
			var month = dates[y].getMonth() + 1;
			var dateStr = month + "-" + dates[y].getDate() + "-" + dates[y].getFullYear();
			if (!dojo.lang.isArray(calculatedEvents[dateStr])) {
				calculatedEvents[dateStr] = [];
			}
			if (!dojo.lang.inArray(calculatedEvents[dateStr], this.recurring[x])) {
				calculatedEvents[dateStr].push(this.recurring[x]);
			}
		}
	}
	this.recurringEvents = calculatedEvents;
}, getEvents:function (date) {
	var events = [];
	var recur = [];
	var nonRecur = [];
	var month = date.getMonth() + 1;
	var dateStr = month + "-" + date.getDate() + "-" + date.getFullYear();
	if (dojo.lang.isArray(this.nonRecurringEvents[dateStr])) {
		nonRecur = this.nonRecurringEvents[dateStr];
		dojo.debug("Number of nonRecurring Events: " + nonRecur.length);
	}
	if (dojo.lang.isArray(this.recurringEvents[dateStr])) {
		recur = this.recurringEvents[dateStr];
	}
	events = recur.concat(nonRecur);
	if (events.length > 0) {
		return events;
	}
	return null;
}});
var StandardProperties = [_P("dtstart", 1, true), _P("tzoffsetto", 1, true), _P("tzoffsetfrom", 1, true), _P("comment"), _P("rdate"), _P("rrule"), _P("tzname")];
dojo.cal.iCalendar.Standard = function (body) {
	this.name = "STANDARD";
	this._ValidProperties = StandardProperties;
	dojo.cal.iCalendar.Component.call(this, body);
};
dojo.inherits(dojo.cal.iCalendar.Standard, dojo.cal.iCalendar.Component);
var DaylightProperties = [_P("dtstart", 1, true), _P("tzoffsetto", 1, true), _P("tzoffsetfrom", 1, true), _P("comment"), _P("rdate"), _P("rrule"), _P("tzname")];
dojo.cal.iCalendar.Daylight = function (body) {
	this.name = "DAYLIGHT";
	this._ValidProperties = DaylightProperties;
	dojo.cal.iCalendar.Component.call(this, body);
};
dojo.inherits(dojo.cal.iCalendar.Daylight, dojo.cal.iCalendar.Component);
var VEventProperties = [_P("class", 1), _P("created", 1), _P("description", 1), _P("dtstart", 1), _P("geo", 1), _P("last-mod", 1), _P("location", 1), _P("organizer", 1), _P("priority", 1), _P("dtstamp", 1), _P("seq", 1), _P("status", 1), _P("summary", 1), _P("transp", 1), _P("uid", 1), _P("url", 1), _P("recurid", 1), [_P("dtend", 1), _P("duration", 1)], _P("attach"), _P("attendee"), _P("categories"), _P("comment"), _P("contact"), _P("exdate"), _P("exrule"), _P("rstatus"), _P("related"), _P("resources"), _P("rdate"), _P("rrule")];
dojo.cal.iCalendar.VEvent = function (body) {
	this._ValidProperties = VEventProperties;
	this.name = "VEVENT";
	dojo.cal.iCalendar.Component.call(this, body);
	this.recurring = false;
	this.startDate = dojo.date.fromIso8601(this.dtstart.value);
};
dojo.inherits(dojo.cal.iCalendar.VEvent, dojo.cal.iCalendar.Component);
dojo.extend(dojo.cal.iCalendar.VEvent, {getDates:function (until) {
	var dtstart = this.getDate();
	var recurranceSet = [];
	var weekdays = ["su", "mo", "tu", "we", "th", "fr", "sa"];
	var order = {"daily":1, "weekly":2, "monthly":3, "yearly":4, "byday":1, "bymonthday":1, "byweekno":2, "bymonth":3, "byyearday":4};
	for (var x = 0; x < this.rrule.length; x++) {
		var rrule = this.rrule[x];
		var freq = rrule.freq.toLowerCase();
		var interval = 1;
		if (rrule.interval > interval) {
			interval = rrule.interval;
		}
		var set = [];
		var freqInt = order[freq];
		if (rrule.until) {
			var tmpUntil = dojo.date.fromIso8601(rrule.until);
		} else {
			var tmpUntil = until;
		}
		if (tmpUntil > until) {
			tmpUntil = until;
		}
		if (dtstart < tmpUntil) {
			var expandingRules = function () {
			};
			var cullingRules = function () {