/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.zxing.client.result;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Sean Owen
*/
public final class CalendarParsedResult extends ParsedResult {
private static final Pattern RFC2445_DURATION = Pattern
.compile("P(?:(\\d+)W)?(?:(\\d+)D)?(?:T(?:(\\d+)H)?(?:(\\d+)M)?(?:(\\d+)S)?)?");
private static final long[] RFC2445_DURATION_FIELD_UNITS = {
7 * 24 * 60 * 60 * 1000L, // 1 week
24 * 60 * 60 * 1000L, // 1 day
60 * 60 * 1000L, // 1 hour
60 * 1000L, // 1 minute
1000L, // 1 second
};
private static final Pattern DATE_TIME = Pattern
.compile("[0-9]{8}(T[0-9]{6}Z?)?");
private final String summary;
private final Date start;
private final boolean startAllDay;
private final Date end;
private final boolean endAllDay;
private final String location;
private final String organizer;
private final String[] attendees;
private final String description;
private final double latitude;
private final double longitude;
public CalendarParsedResult(String summary, String startString,
String endString, String durationString, String location,
String organizer, String[] attendees, String description,
double latitude, double longitude) {
super(ParsedResultType.CALENDAR);
this.summary = summary;
try {
this.start = parseDate(startString);
} catch (ParseException pe) {
throw new IllegalArgumentException(pe.toString());
}
if (endString == null) {
long durationMS = parseDurationMS(durationString);
end = durationMS < 0L ? null : new Date(start.getTime()
+ durationMS);
} else {
try {
this.end = parseDate(endString);
} catch (ParseException pe) {
throw new IllegalArgumentException(pe.toString());
}
}
this.startAllDay = startString.length() == 8;
this.endAllDay = endString != null && endString.length() == 8;
this.location = location;
this.organizer = organizer;
this.attendees = attendees;
this.description = description;
this.latitude = latitude;
this.longitude = longitude;
}
public String getSummary() {
return summary;
}
/**
* @return start time
*/
public Date getStart() {
return start;
}
/**
* @return true if start time was specified as a whole day
*/
public boolean isStartAllDay() {
return startAllDay;
}
/**
* @return event end {@link Date}, or {@code null} if event has no duration
* @see #getStart()
*/
public Date getEnd() {
return end;
}
/**
* @return true if end time was specified as a whole day
*/
public boolean isEndAllDay() {
return endAllDay;
}
public String getLocation() {
return location;
}
public String getOrganizer() {
return organizer;
}
public String[] getAttendees() {
return attendees;
}
public String getDescription() {
return description;
}
public double getLatitude() {
return latitude;
}
public double getLongitude() {
return longitude;
}
@Override
public String getDisplayResult() {
StringBuilder result = new StringBuilder(100);
maybeAppend(summary, result);
maybeAppend(format(startAllDay, start), result);
maybeAppend(format(endAllDay, end), result);
maybeAppend(location, result);
maybeAppend(organizer, result);
maybeAppend(attendees, result);
maybeAppend(description, result);
return result.toString();
}
/**
* Parses a string as a date. RFC 2445 allows the start and end fields to be
* of type DATE (e.g. 20081021) or DATE-TIME (e.g. 20081021T123000 for local
* time, or 20081021T123000Z for UTC).
*
* @param when
* The string to parse
* @throws ParseException
* if not able to parse as a date
*/
private static Date parseDate(String when) throws ParseException {
if (!DATE_TIME.matcher(when).matches()) {
throw new ParseException(when, 0);
}
if (when.length() == 8) {
// Show only year/month/day
return buildDateFormat().parse(when);
} else {
// The when string can be local time, or UTC if it ends with a Z
Date date;
if (when.length() == 16 && when.charAt(15) == 'Z') {
date = buildDateTimeFormat().parse(when.substring(0, 15));
Calendar calendar = new GregorianCalendar();
long milliseconds = date.getTime();
// Account for time zone difference
milliseconds += calendar.get(Calendar.ZONE_OFFSET);
// Might need to correct for daylight savings time, but use
// target time since
// now might be in DST but not then, or vice versa
calendar.setTime(new Date(milliseconds));
milliseconds += calendar.get(Calendar.DST_OFFSET);
date = new Date(milliseconds);
} else {
date = buildDateTimeFormat().parse(when);
}
return date;
}
}
private static String format(boolean allDay, Date date) {
if (date == null) {
return null;
}
DateFormat format = allDay ? DateFormat
.getDateInstance(DateFormat.MEDIUM) : DateFormat
.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM);
return format.format(date);
}
private static long parseDurationMS(CharSequence durationString) {
if (durationString == null) {
return -1L;
}
Matcher m = RFC2445_DURATION.matcher(durationString);
if (!m.matches()) {
return -1L;
}
long durationMS = 0L;
for (int i = 0; i < RFC2445_DURATION_FIELD_UNITS.length; i++) {
String fieldValue = m.group(i + 1);
if (fieldValue != null) {
durationMS += RFC2445_DURATION_FIELD_UNITS[i]
* Integer.parseInt(fieldValue);
}
}
return durationMS;
}
private static DateFormat buildDateFormat() {
DateFormat format = new SimpleDateFormat("yyyyMMdd", Locale.ENGLISH);
// For dates without a time, for purposes of interacting with Android,
// the resulting timestamp
// needs to be midnight of that day in GMT. See:
// http://code.google.com/p/android/issues/detail?id=8330
format.setTimeZone(TimeZone.getTimeZone("GMT"));
return format;
}
private static DateFormat buildDateTimeFormat() {
return new SimpleDateFormat("yyyyMMdd'T'HHmmss", Locale.ENGLISH);
}
}