/*
* Copyright 2013 Google Inc.
*
* 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.android.apps.dashclock.calendar;
import com.google.android.apps.dashclock.LogUtils;
import com.google.android.apps.dashclock.api.DashClockExtension;
import com.google.android.apps.dashclock.api.ExtensionData;
import net.nurik.roman.dashclock.R;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.preference.PreferenceManager;
import android.provider.CalendarContract;
import android.text.TextUtils;
import android.text.format.DateFormat;
import android.util.Pair;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.TimeZone;
import static com.google.android.apps.dashclock.LogUtils.LOGD;
import static com.google.android.apps.dashclock.LogUtils.LOGE;
/**
* Calendar "upcoming appointment" extension.
*/
public class CalendarExtension extends DashClockExtension {
private static final String TAG = LogUtils.makeLogTag(CalendarExtension.class);
public static final String PREF_CUSTOM_VISIBILITY = "pref_calendar_custom_visibility";
public static final String PREF_SELECTED_CALENDARS = "pref_calendar_selected";
public static final String PREF_LOOK_AHEAD_HOURS = "pref_calendar_look_ahead_hours";
public static final String PREF_SHOW_ALL_DAY = "pref_calendar_show_all_day";
private static final String SQL_TAUTOLOGY = "1=1";
private static final long MINUTE_MILLIS = 60 * 1000;
private static final long HOUR_MILLIS = 60 * MINUTE_MILLIS;
// Show events happening "now" if they started under 5 minutes ago
public static final long NOW_BUFFER_TIME_MILLIS = 5 * MINUTE_MILLIS;
private static final int DEFAULT_LOOK_AHEAD_HOURS = 6;
private int mLookAheadHours = DEFAULT_LOOK_AHEAD_HOURS;
static List<Pair<String, Boolean>> getAllCalendars(Context context) {
// Only return calendars that are marked as synced to device.
// (This is different from the display flag)
List<Pair<String, Boolean>> calendars = new ArrayList<Pair<String, Boolean>>();
try {
Cursor cursor = context.getContentResolver().query(
CalendarContract.Calendars.CONTENT_URI,
CalendarsQuery.PROJECTION,
CalendarContract.Calendars.SYNC_EVENTS + "=1",
null,
null);
if (cursor != null) {
while (cursor.moveToNext()) {
calendars.add(new Pair<String, Boolean>(
cursor.getString(CalendarsQuery.ID),
cursor.getInt(CalendarsQuery.VISIBLE) == 1));
}
cursor.close();
}
} catch (SecurityException e) {
LOGE(TAG, "Error querying calendar API", e);
return null;
}
return calendars;
}
private Set<String> getSelectedCalendars() {
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
boolean customVisibility = sp.getBoolean(PREF_CUSTOM_VISIBILITY, false);
Set<String> selectedCalendars = sp.getStringSet(PREF_SELECTED_CALENDARS, null);
if (!customVisibility || selectedCalendars == null) {
final List<Pair<String, Boolean>> allCalendars = getAllCalendars(this);
// Build a set of all visible calendars in case we don't have a selection set in
// the preferences.
selectedCalendars = new HashSet<String>();
for (Pair<String, Boolean> pair : allCalendars) {
if (pair.second) {
selectedCalendars.add(pair.first);
}
}
}
return selectedCalendars;
}
@Override
protected void onInitialize(boolean isReconnect) {
super.onInitialize(isReconnect);
if (!isReconnect) {
addWatchContentUris(new String[]{
CalendarContract.Events.CONTENT_URI.toString()
});
}
setUpdateWhenScreenOn(true);
}
@Override
protected void onUpdateData(int reason) {
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
boolean showAllDay = sp.getBoolean(PREF_SHOW_ALL_DAY, false);
try {
mLookAheadHours = Integer.parseInt(sp.getString(PREF_LOOK_AHEAD_HOURS,
Integer.toString(mLookAheadHours)));
} catch (NumberFormatException e) {
mLookAheadHours = DEFAULT_LOOK_AHEAD_HOURS;
}
Cursor cursor = tryOpenEventsCursor(showAllDay);
if (cursor == null) {
LOGE(TAG, "Null events cursor, short-circuiting.");
return;
}
long currentTimestamp = getCurrentTimestamp();
long nextTimestamp = 0;
long endTimestamp = 0;
long timeUntilNextAppointent = 0;
boolean allDay = false;
int allDayPosition = -1;
long allDayTimestampLocalMidnight = 0;
while (cursor.moveToNext()) {
nextTimestamp = cursor.getLong(EventsQuery.BEGIN);
int tzOffset = TimeZone.getDefault().getOffset(nextTimestamp);
allDay = cursor.getInt(EventsQuery.ALL_DAY) != 0;
if (allDay) {
endTimestamp = cursor.getLong(EventsQuery.END) - tzOffset;
if (showAllDay && allDayPosition < 0 && endTimestamp > currentTimestamp) {
// Store the position of this all day event. If no regular events are found
// and the user wanted to see all day events, then show this all day event.
allDayPosition = cursor.getPosition();
// For all day events (if the user wants to see them), convert the begin
// timestamp, which is the midnight UTC time, to local time. That is,
// allDayTimestampLocalMidnight will be midnight in local time since that's a
// more relevant representation of that day to the user.
allDayTimestampLocalMidnight = nextTimestamp - tzOffset;
}
continue;
}
timeUntilNextAppointent = nextTimestamp - currentTimestamp;
if (timeUntilNextAppointent >= -NOW_BUFFER_TIME_MILLIS) {
// Use this event even if it's already started, a few minutes in
break;
}
// Skip over events that are not ALL_DAY but span multiple days, including
// the next 6 hours. An example is an event that starts at 4pm yesterday
// day and ends 6pm tomorrow.
LOGD(TAG, "Skipping over event with start timestamp " + nextTimestamp + ". "
+ "Current timestamp " + currentTimestamp);
}
if (allDayPosition >= 0) {
// Only show all day events if there's no regular event (cursor is after last)
// or if the all day event is tomorrow or later and the all day event is earlier than
// the regular event.
if (cursor.isAfterLast()
|| ((allDayTimestampLocalMidnight - currentTimestamp) > 0
&& allDayTimestampLocalMidnight < nextTimestamp)) {
cursor.moveToPosition(allDayPosition);
allDay = true;
nextTimestamp = allDayTimestampLocalMidnight;
timeUntilNextAppointent = nextTimestamp - currentTimestamp;
LOGD(TAG, "Showing an all day event because either no regular event was found or "
+ "it's a full day later than the all-day event.");
}
}
if (cursor.isAfterLast()) {
LOGD(TAG, "No upcoming appointments found.");
cursor.close();
publishUpdate(new ExtensionData());
return;
}
Calendar nextEventCalendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
nextEventCalendar.setTimeInMillis(nextTimestamp);
int minutesUntilNextAppointment = (int) (timeUntilNextAppointent / MINUTE_MILLIS);
String untilString;
if (allDay) {
if (timeUntilNextAppointent <= 0) {
// All day event happening today (its start time is past today's midnight
// offset.
untilString = getString(R.string.today);
} else {
untilString = new SimpleDateFormat("E").format(nextEventCalendar.getTime());
}
} else if (minutesUntilNextAppointment < 2) {
untilString = getResources().getString(R.string.now);
} else if (minutesUntilNextAppointment < 60) {
untilString = getResources().getQuantityString(
R.plurals.calendar_template_mins,
minutesUntilNextAppointment,
minutesUntilNextAppointment);
} else {
int hours = Math.round(minutesUntilNextAppointment / 60f);
if (hours < 24) {
untilString = getResources().getQuantityString(
R.plurals.calendar_template_hours, hours, hours);
} else {
untilString = new SimpleDateFormat("E").format(nextEventCalendar.getTime());
}
}
String eventTitle = cursor.getString(EventsQuery.TITLE);
String eventLocation = cursor.getString(EventsQuery.EVENT_LOCATION);
long eventId = cursor.getLong(EventsQuery.EVENT_ID);
long eventBegin = cursor.getLong(EventsQuery.BEGIN);
long eventEnd = cursor.getLong(EventsQuery.END);
cursor.close();
String expandedTime = null;
StringBuilder expandedTimeFormat = new StringBuilder();
if (allDay) {
if (timeUntilNextAppointent <= 0) {
// All day event happening today (its start time is past today's midnight
// offset.
expandedTimeFormat.setLength(0);
expandedTime = getString(R.string.today);
} else {
expandedTimeFormat.append("EEEE, MMM dd");
}
} else if (minutesUntilNextAppointment < 2) {
// Event happening right now!
expandedTimeFormat.setLength(0);
expandedTime = getString(R.string.now);
} else {
if (timeUntilNextAppointent > 24 * HOUR_MILLIS) {
expandedTimeFormat.append("EEEE, ");
}
if (DateFormat.is24HourFormat(this)) {
expandedTimeFormat.append("HH:mm");
} else {
expandedTimeFormat.append("h:mm a");
}
}
if (expandedTimeFormat.length() > 0) {
expandedTime = new SimpleDateFormat(expandedTimeFormat.toString())
.format(nextEventCalendar.getTime());
}
String expandedBody = expandedTime;
if (!TextUtils.isEmpty(eventLocation)) {
expandedBody = getString(R.string.calendar_with_location_template,
expandedTime, eventLocation);
}
publishUpdate(new ExtensionData()
.visible(allDay || (timeUntilNextAppointent >= -NOW_BUFFER_TIME_MILLIS
&& timeUntilNextAppointent <= mLookAheadHours * HOUR_MILLIS))
.icon(R.drawable.ic_extension_calendar)
.status(untilString)
.expandedTitle(eventTitle)
.expandedBody(expandedBody)
.clickIntent(new Intent(Intent.ACTION_VIEW)
.setData(Uri.withAppendedPath(CalendarContract.Events.CONTENT_URI,
Long.toString(eventId)))
.putExtra(CalendarContract.EXTRA_EVENT_BEGIN_TIME, eventBegin)
.putExtra(CalendarContract.EXTRA_EVENT_END_TIME, eventEnd)));
}
private static long getCurrentTimestamp() {
return Calendar.getInstance(TimeZone.getTimeZone("UTC")).getTimeInMillis();
}
private Cursor tryOpenEventsCursor(boolean showAllDay) {
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
boolean customVisibility = sp.getBoolean(PREF_CUSTOM_VISIBILITY, false);
// Filter out all day events unless the user expressly requested to show all day events
String allDaySelection = SQL_TAUTOLOGY;
if (!showAllDay) {
allDaySelection = CalendarContract.Instances.ALL_DAY + "=0";
}
// Only filter on visible calendars if there isn't custom visibility
String visibleCalendarsSelection = SQL_TAUTOLOGY;
if (!customVisibility) {
allDaySelection = CalendarContract.Instances.VISIBLE + "!=0";
}
String calendarSelection = generateCalendarSelection();
Set<String> calendarSet = getSelectedCalendars();
String[] calendarsSelectionArgs = calendarSet.toArray(new String[calendarSet.size()]);
long now = getCurrentTimestamp();
try {
return getContentResolver().query(
CalendarContract.Instances.CONTENT_URI.buildUpon()
.appendPath(Long.toString(now - NOW_BUFFER_TIME_MILLIS))
.appendPath(Long.toString(now + mLookAheadHours * HOUR_MILLIS))
.build(),
EventsQuery.PROJECTION,
allDaySelection + " AND "
+ CalendarContract.Instances.SELF_ATTENDEE_STATUS + "!="
+ CalendarContract.Attendees.ATTENDEE_STATUS_DECLINED + " AND "
+ "IFNULL(" + CalendarContract.Instances.STATUS + ",0)!="
+ CalendarContract.Instances.STATUS_CANCELED + " AND "
+ visibleCalendarsSelection + " AND ("
+ calendarSelection + ")",
calendarsSelectionArgs,
CalendarContract.Instances.BEGIN);
} catch (Exception e) {
LOGE(TAG, "Error querying calendar API", e);
return null;
}
}
private String generateCalendarSelection() {
Set<String> calendars = getSelectedCalendars();
int count = calendars.size();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < count; i++) {
if (i != 0) {
sb.append(" OR ");
}
sb.append(CalendarContract.Events.CALENDAR_ID);
sb.append(" = ?");
}
if (sb.length() == 0) {
sb.append(SQL_TAUTOLOGY); // constant expression to prevent returning null
}
return sb.toString();
}
private interface EventsQuery {
String[] PROJECTION = {
CalendarContract.Instances.EVENT_ID,
CalendarContract.Instances.BEGIN,
CalendarContract.Instances.END,
CalendarContract.Instances.TITLE,
CalendarContract.Instances.EVENT_LOCATION,
CalendarContract.Instances.ALL_DAY,
};
int EVENT_ID = 0;
int BEGIN = 1;
int END = 2;
int TITLE = 3;
int EVENT_LOCATION = 4;
int ALL_DAY = 5;
}
private interface CalendarsQuery {
String[] PROJECTION = {
CalendarContract.Calendars._ID,
CalendarContract.Calendars.VISIBLE,
};
int ID = 0;
int VISIBLE = 1;
}
}