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/*
* Copyright (C) 2014 The CyanogenMod Project
*
* 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.android.systemui.statusbar.policy;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.database.ContentObserver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Handler;
import android.util.Log;
import cyanogenmod.providers.CMSettings;
import cyanogenmod.providers.WeatherContract;
import cyanogenmod.weather.CMWeatherManager;
import cyanogenmod.weather.util.WeatherUtils;
import java.util.ArrayList;
import static cyanogenmod.providers.WeatherContract.WeatherColumns.CURRENT_CITY;
import static cyanogenmod.providers.WeatherContract.WeatherColumns.CURRENT_CONDITION;
import static cyanogenmod.providers.WeatherContract.WeatherColumns.CURRENT_TEMPERATURE;
import static cyanogenmod.providers.WeatherContract.WeatherColumns.CURRENT_TEMPERATURE_UNIT;
import static cyanogenmod.providers.WeatherContract.WeatherColumns.TempUnit.CELSIUS;
import static cyanogenmod.providers.WeatherContract.WeatherColumns.TempUnit.FAHRENHEIT;
public class WeatherControllerImpl implements WeatherController {
private static final String TAG = WeatherController.class.getSimpleName();
private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
private WeatherContentObserver mWeatherContentObserver;
private Handler mHandler;
private int mWeatherUnit;
private Uri mWeatherTempetarureUri;
public static final ComponentName COMPONENT_WEATHER_FORECAST = new ComponentName(
"com.cyanogenmod.lockclock", "com.cyanogenmod.lockclock.weather.ForecastActivity");
public static final String ACTION_FORCE_WEATHER_UPDATE
= "com.cyanogenmod.lockclock.action.FORCE_WEATHER_UPDATE";
private static final String[] WEATHER_PROJECTION = new String[]{
CURRENT_TEMPERATURE,
CURRENT_TEMPERATURE_UNIT,
CURRENT_CITY,
CURRENT_CONDITION
};
private final ArrayList<Callback> mCallbacks = new ArrayList<Callback>();
private final Context mContext;
private WeatherInfo mCachedInfo = new WeatherInfo();
public WeatherControllerImpl(Context context) {
mContext = context;
mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
mHandler = new Handler();
mWeatherContentObserver = new WeatherContentObserver(mHandler);
mWeatherTempetarureUri
= CMSettings.Global.getUriFor(CMSettings.Global.WEATHER_TEMPERATURE_UNIT);
mContext.getContentResolver().registerContentObserver(
WeatherContract.WeatherColumns.CURRENT_WEATHER_URI,true, mWeatherContentObserver);
mContext.getContentResolver().registerContentObserver(mWeatherTempetarureUri, true,
mWeatherContentObserver);
queryWeatherTempUnit();
queryWeather();
}
public void addCallback(Callback callback) {
if (callback == null || mCallbacks.contains(callback)) return;
if (DEBUG) Log.d(TAG, "addCallback " + callback);
mCallbacks.add(callback);
callback.onWeatherChanged(mCachedInfo); // immediately update with current values
}
public void removeCallback(Callback callback) {
if (callback == null) return;
if (DEBUG) Log.d(TAG, "removeCallback " + callback);
mCallbacks.remove(callback);
}
@Override
public WeatherInfo getWeatherInfo() {
return mCachedInfo;
}
private void queryWeather() {
Cursor c = mContext.getContentResolver().query(
WeatherContract.WeatherColumns.CURRENT_WEATHER_URI, WEATHER_PROJECTION,
null, null, null);
if (c == null) {
if(DEBUG) Log.e(TAG, "cursor was null for temperature, forcing weather update");
//LockClock keeps track of the user settings (temp unit, search by geo location/city)
//so we delegate the responsibility of handling a weather update to LockClock
mContext.sendBroadcast(new Intent(ACTION_FORCE_WEATHER_UPDATE));
} else {
try {
c.moveToFirst();
double temp = c.getDouble(0);
int reportedUnit = c.getInt(1);
if (reportedUnit == CELSIUS && mWeatherUnit == FAHRENHEIT) {
temp = WeatherUtils.celsiusToFahrenheit(temp);
} else if (reportedUnit == FAHRENHEIT && mWeatherUnit == CELSIUS) {
temp = WeatherUtils.fahrenheitToCelsius(temp);
}
mCachedInfo.temp = temp;
mCachedInfo.tempUnit = mWeatherUnit;
mCachedInfo.city = c.getString(2);
mCachedInfo.condition = c.getString(3);
} finally {
c.close();
}
}
}
private void fireCallback() {
for (Callback callback : mCallbacks) {
callback.onWeatherChanged(mCachedInfo);
}
}
private class WeatherContentObserver extends ContentObserver {
public WeatherContentObserver(Handler handler) {
super(handler);
}
@Override
public void onChange(boolean selfChange, Uri uri) {
if (uri != null) {
if (uri.compareTo(WeatherContract.WeatherColumns.CURRENT_WEATHER_URI) == 0) {
queryWeather();
fireCallback();
} else if (uri.compareTo(mWeatherTempetarureUri) == 0) {
queryWeatherTempUnit();
fixCachedWeatherInfo();
fireCallback();
} else {
super.onChange(selfChange, uri);
}
}
}
@Override
public void onChange(boolean selfChange) {
onChange(selfChange, null);
}
}
private void queryWeatherTempUnit() {
try {
mWeatherUnit = CMSettings.Global.getInt(mContext.getContentResolver(),
CMSettings.Global.WEATHER_TEMPERATURE_UNIT);
} catch (CMSettings.CMSettingNotFoundException e) {
//CMSettingsProvider should have taken care of setting a default value for this setting
//so how is that we ended up here?? We need to set a valid temp unit anyway to keep
//this going
mWeatherUnit = WeatherContract.WeatherColumns.TempUnit.CELSIUS;
}
}
private void fixCachedWeatherInfo() {
if (mCachedInfo.tempUnit == CELSIUS && mWeatherUnit == FAHRENHEIT) {
mCachedInfo.temp = WeatherUtils.celsiusToFahrenheit(mCachedInfo.temp);
mCachedInfo.tempUnit = FAHRENHEIT;
} else if (mCachedInfo.tempUnit == FAHRENHEIT && mWeatherUnit == CELSIUS) {
mCachedInfo.temp = WeatherUtils.fahrenheitToCelsius(mCachedInfo.temp);
mCachedInfo.tempUnit = CELSIUS;
}
}
}
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