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/*
* Copyright (C) 2013 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.cyanogenmod.lockclock.weather;
import android.content.Context;
import android.location.Location;
import android.net.Uri;
import android.util.Log;
import com.cyanogenmod.lockclock.misc.Preferences;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Locale;
public class YahooWeatherProvider implements WeatherProvider {
private static final String TAG = "YahooWeatherProvider";
private static final String URL_WEATHER =
"http://query.yahooapis.com/v1/public/yql?format=json&q=" +
Uri.encode("select * from weather.forecast where woeid =");
private static final String URL_LOCATION =
"http://query.yahooapis.com/v1/public/yql?format=json&q=" +
Uri.encode("select woeid, postal, admin1, admin2, admin3, " +
"locality1, locality2, country from geo.places where " +
"(placetype = 7 or placetype = 8 or placetype = 9 " +
"or placetype = 10 or placetype = 11) and text =");
private static final String[] LOCALITY_NAMES = new String[] {
"locality1", "locality2", "admin3", "admin2", "admin1"
};
private static class YahooLocationResult extends LocationResult {
private int score;
};
private static final Comparator<YahooLocationResult> LOCATION_COMPARATOR =
new Comparator<YahooLocationResult>() {
@Override
public int compare(YahooLocationResult lhs, YahooLocationResult rhs) {
if (lhs.score == rhs.score) {
return 0;
}
// smaller score at the top
return lhs.score < rhs.score ? -1 : 1;
}
};
private Context mContext;
public YahooWeatherProvider(Context context) {
mContext = context;
}
@Override
public List<LocationResult> getLocations(String input) {
String locale = mContext.getResources().getConfiguration().locale.getCountry();
String params = "\"" + input + "\" and lang = \"" + locale + "\"";
String url = URL_LOCATION + Uri.encode(params);
JSONArray places = fetchPlaceList(url);
if (places == null) {
return null;
}
return new ArrayList<LocationResult>(parsePlaces(places));
}
public WeatherInfo getWeatherInfo(String id, String localizedCityName) {
String unit = Preferences.useMetricUnits(mContext) ? "c" : "f";
String params = "\"" + id + "\" and u = \"" + unit + "\"";
String url = URL_WEATHER + Uri.encode(params);
String response = HttpRetriever.retrieve(url);
if (response == null) {
return null;
}
try {
JSONObject rootObject = new JSONObject(response);
JSONObject results = rootObject.getJSONObject("query").getJSONObject("results");
JSONObject data = results.getJSONObject("channel");
String city = localizedCityName != null
? localizedCityName : data.getJSONObject("location").getString("city");
JSONObject wind = data.getJSONObject("wind");
JSONObject units = data.getJSONObject("units");
JSONObject item = data.getJSONObject("item");
JSONObject conditions = item.getJSONObject("condition");
JSONObject forecast = item.getJSONArray("forecast").getJSONObject(0);
WeatherInfo w = new WeatherInfo(mContext, id, city,
/* forecastDate */ conditions.getString("date"),
/* condition */ conditions.getString("text"),
/* conditionCode */ conditions.getInt("code"),
/* temperature */ (float) conditions.getDouble("temp"),
/* low */ (float) forecast.getDouble("low"),
/* high */ (float) forecast.getDouble("high"),
/* tempUnit */ units.getString("temperature"),
/* humidity */ (float) data.getJSONObject("atmosphere").getDouble("humidity"),
/* wind */ (float) wind.optDouble("speed", -1),
/* windDir */ wind.optInt("direction", -1),
/* speedUnit */ units.getString("speed"),
System.currentTimeMillis());
Log.d(TAG, "Weather updated: " + w);
return w;
} catch (JSONException e) {
Log.w(TAG, "Weather condition data is invalid.", e);
}
return null;
}
public WeatherInfo getWeatherInfo(Location location) {
String formattedCoordinates = String.format(Locale.US, "\"%f %f\"",
location.getLatitude(), location.getLongitude());
String url = URL_LOCATION + Uri.encode(formattedCoordinates);
JSONArray places = fetchPlaceList(url);
if (places == null) {
return null;
}
List<YahooLocationResult> results = parsePlaces(places);
Collections.sort(results, LOCATION_COMPARATOR);
for (YahooLocationResult result : results) {
Log.d(TAG, "Looking up weather for " + result.city + " (id=" + result.id
+ ", score=" + result.score + ")");
WeatherInfo info = getWeatherInfo(result.id, result.city);
if (info != null) {
// cache the result for potential reuse
// (the placefinder service API is rate limited)
Preferences.setCachedLocationId(mContext, result.id);
return info;
}
}
return null;
}
private List<YahooLocationResult> parsePlaces(JSONArray places) {
ArrayList<YahooLocationResult> results = new ArrayList<YahooLocationResult>();
for (int i = 0; i < places.length(); i++) {
try {
YahooLocationResult result = parsePlace(places.getJSONObject(i));
if (result != null) {
results.add(result);
}
} catch (JSONException e) {
Log.w(TAG, "Found invalid JSON place record, ignoring.", e);
}
}
return results;
}
private YahooLocationResult parsePlace(JSONObject place) throws JSONException {
YahooLocationResult result = new YahooLocationResult();
JSONObject country = place.getJSONObject("country");
result.id = place.getString("woeid");
result.country = country.getString("content");
result.countryId = country.getString("code");
if (!place.isNull("postal")) {
result.postal = place.getJSONObject("postal").getString("content");
}
for (int i = 0; i < LOCALITY_NAMES.length; i++) {
String locName = LOCALITY_NAMES[i];
if (!place.isNull(locName)) {
result.city = place.getJSONObject(locName).getString("content");
result.score = i;
break;
}
}
if (result.id == null || result.city == null || result.countryId == null) {
return null;
}
return result;
}
private JSONArray fetchPlaceList(String url) {
String response = HttpRetriever.retrieve(url);
if (response == null) {
return null;
}
try {
JSONObject rootObject = new JSONObject(response);
JSONObject results = rootObject.getJSONObject("query").getJSONObject("results");
JSONArray places = results.optJSONArray("place");
if (places == null) {
// Yahoo returns an object instead of an array when there's only one result
places = new JSONArray();
places.put(results.getJSONObject("place"));
}
return places;
} catch (JSONException e) {
Log.w(TAG, "Received malformed places data", e);
}
return null;
}
};
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