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/**
* Copyright (C) 2014 The CyanogenMod Project
*/
package com.android.calendar.icalendar;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.ListIterator;
import java.util.UUID;
/**
* Models the Event/VEvent component of the iCalendar format
*/
public class VEvent {
// valid property identifiers for an event component
// TODO: only a partial list of attributes has been implemented, implement the rest
public static String CLASS = "CLASS";
public static String CREATED = "CREATED";
public static String LOCATION = "LOCATION";
public static String ORGANIZER = "ORGANIZER";
public static String PRIORITY = "PRIORITY";
public static String SEQ = "SEQ";
public static String STATUS = "STATUS";
public static String UID = "UID";
public static String URL = "URL";
public static String DTSTART = "DTSTART";
public static String DTEND = "DTEND";
public static String DURATION = "DURATION";
public static String DTSTAMP = "DTSTAMP";
public static String SUMMARY = "SUMMARY";
public static String DESCRIPTION = "DESCRIPTION";
public static String ATTENDEE = "ATTENDEE";
public static String CATEGORIES = "CATEGORIES";
// stores the -arity of the attributes that this component can have
private static HashMap<String, Integer> sPropertyList = new HashMap<String, Integer>();
// initialize the approved list of mProperties for a calendar event
static {
sPropertyList.put(CLASS,1);
sPropertyList.put(CREATED,1);
sPropertyList.put(LOCATION,1);
sPropertyList.put(ORGANIZER,1);
sPropertyList.put(PRIORITY,1);
sPropertyList.put(SEQ,1);
sPropertyList.put(STATUS,1);
sPropertyList.put(UID,1);
sPropertyList.put(URL,1);
sPropertyList.put(DTSTART,1);
sPropertyList.put(DTEND,1);
sPropertyList.put(DURATION, 1);
sPropertyList.put(DTSTAMP,1);
sPropertyList.put(SUMMARY,1);
sPropertyList.put(DESCRIPTION,1);
sPropertyList.put(ATTENDEE, Integer.MAX_VALUE);
sPropertyList.put(CATEGORIES, Integer.MAX_VALUE);
sPropertyList.put(CATEGORIES, Integer.MAX_VALUE);
}
// stores attributes and their corresponding values belonging to the Event component
public HashMap<String, String> mProperties;
public LinkedList<Attendee> mAttendees;
public Organizer mOrganizer;
/**
* Constructor
*/
public VEvent() {
mProperties = new HashMap<String, String>();
mAttendees = new LinkedList<Attendee>();
// generate and add a unique identifier to this event - ical requisite
addProperty(UID , UUID.randomUUID().toString() + "@cyanogenmod.com");
addTimeStamp();
}
/**
* For adding unary properties. For adding other property attributes , use the respective
* component methods to create and add these special components.
* @param property
* @param value
* @return
*/
public boolean addProperty(String property, String value) {
// only unary-properties for now
if (sPropertyList.containsKey(property) && sPropertyList.get(property) == 1 &&
value != null) {
mProperties.put(property, IcalendarUtils.cleanseString(value));
return true;
}
return false;
}
/**
* returns the value of the requested event property or null if there isn't one
*/
public String getProperty(String property) {
return mProperties.get(property);
}
/**
* Add attendees to the event
* @param attendee
*/
public void addAttendee(Attendee attendee) {
if(attendee != null) mAttendees.add(attendee);
}
/**
* Add an Organizer to the Event
* @param organizer
*/
public void addOrganizer(Organizer organizer) {
if (organizer != null) mOrganizer = organizer;
}
/**
* Add an start date-time to the event
*/
public void addEventStart(long startMillis, String timeZone) {
if (startMillis < 0) return;
String formattedDateTime = IcalendarUtils.getICalFormattedDateTime(startMillis, timeZone);
addProperty(DTSTART, formattedDateTime);
}
/**
* Add an end date-time for event
*/
public void addEventEnd(long endMillis, String timeZone) {
if (endMillis < 0) return;
String formattedDateTime = IcalendarUtils.getICalFormattedDateTime(endMillis, timeZone);
addProperty(DTEND, formattedDateTime);
}
/**
* Timestamps the events with the current date-time
*/
private void addTimeStamp() {
String formattedDateTime = IcalendarUtils.getICalFormattedDateTime(
System.currentTimeMillis(), "UTC");
addProperty(DTSTAMP, formattedDateTime);
}
/**
* Returns the iCal representation of the Event component
*/
public String getICalFormattedString() {
StringBuilder sb = new StringBuilder();
// Add Event properties
sb.append("BEGIN:VEVENT\n");
for (String property : mProperties.keySet() ) {
sb.append(property + ":" + mProperties.get(property) + "\n");
}
// Enforce line length requirements
sb = IcalendarUtils.enforceICalLineLength(sb);
sb.append(mOrganizer.getICalFormattedString());
// add event Attendees
for (Attendee attendee : mAttendees) {
sb.append(attendee.getICalFormattedString());
}
sb.append("END:VEVENT\n");
return sb.toString();
}
public void populateFromEntries(ListIterator<String> iter) {
while (iter.hasNext()) {
String line = iter.next();
if (line.contains("BEGIN:VEVENT")) {
// Continue
} else if (line.startsWith("END:EVENT")) {
break;
} else if (line.startsWith("ORGANIZER")) {
String entry = parseTillNextAttribute(iter, line);
mOrganizer = Organizer.populateFromICalString(entry);
} else if (line.startsWith("ATTENDEE")) {
// Go one previous, so VEvent, parses current line
iter.previous();
// Offload to Attendee for parsing
Attendee attendee = new Attendee();
attendee.populateFromEntries(iter);
mAttendees.add(attendee);
} else if (line.contains(":")) {
String entry = parseTillNextAttribute(iter, line);
int indexOfFirstColon = entry.indexOf(":");
String key = entry.substring(0, indexOfFirstColon);
String value = entry.substring(indexOfFirstColon + 1);
mProperties.put(key, value);
}
}
}
public static String parseTillNextAttribute(ListIterator<String> iter, String currentLine) {
StringBuilder parse = new StringBuilder();
parse.append(currentLine);
while (iter.hasNext()) {
String line = iter.next();
if (line.startsWith(" ")) {
parse.append(line.replaceFirst(" ", ""));
} else {
iter.previous();
break;
}
}
return parse.toString();
}
}
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