Add support for Omnirom Omnijaws weather service.

This uses a contentobserver and doesn't do anything if it's not available.
Should be feature equivalent to the LineageOS weather receiver.

app/src/main/AndroidManifest.xml

@@ -21,6 +21,7 @@
 
     <uses-permission android:name="cyanogenmod.permission.ACCESS_WEATHER_MANAGER" />
     <uses-permission android:name="cyanogenmod.permission.READ_WEATHER" />
+    <uses-permission android:name="org.omnirom.omnijaws.READ_WEATHER" />
 
     <uses-feature
         android:name="android.hardware.bluetooth"

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/externalevents/OmniJawsObserver.java

@@ -0,0 +1,163 @@
+package nodomain.freeyourgadget.gadgetbridge.externalevents;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.database.ContentObserver;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Handler;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+
+import nodomain.freeyourgadget.gadgetbridge.GBApplication;
+import nodomain.freeyourgadget.gadgetbridge.model.Weather;
+import nodomain.freeyourgadget.gadgetbridge.model.WeatherSpec;
+
+
+public class OmniJawsObserver extends ContentObserver {
+
+    private static final Logger LOG = LoggerFactory.getLogger(OmniJawsObserver.class);
+
+    private static final String SERVICE_PACKAGE = "org.omnirom.omnijaws";
+    public static final Uri WEATHER_URI = Uri.parse("content://org.omnirom.omnijaws.provider/weather");
+    private static final Uri SETTINGS_URI = Uri.parse("content://org.omnirom.omnijaws.provider/settings");
+
+    private Context mContext;
+    private boolean mInstalled;
+    private boolean mEnabled = false;
+    private boolean mMetric = true;
+
+
+    private final String[] WEATHER_PROJECTION = new String[]{
+            "city",
+            "condition", //unused, see below
+            "condition_code",
+            "temperature",
+            "humidity",
+            "forecast_low",
+            "forecast_high",
+            "forecast_condition",
+            "forecast_condition_code",
+            "time_stamp",
+            "forecast_date"
+    };
+
+    private final String[] SETTINGS_PROJECTION = new String[]{
+            "enabled",
+            "units"
+    };
+
+    public OmniJawsObserver(Handler handler) throws NameNotFoundException {
+        super(handler);
+        mContext = GBApplication.getContext();
+        mInstalled = isOmniJawsServiceAvailable();
+        LOG.info("OmniJaws installation status: " + mInstalled);
+        checkSettings();
+        LOG.info("OmniJaws is enabled: " + mEnabled);
+        if (!mEnabled) {
+            throw new NameNotFoundException();
+        }
+
+        updateWeather();
+    }
+
+    @Override
+    public void onChange(boolean selfChange) {
+        super.onChange(selfChange);
+        LOG.info("Weather update received");
+        checkSettings();
+        if (!mEnabled) {
+            LOG.info("Provider was disabled, ignoring.");
+            return;
+        }
+        queryWeather();
+    }
+
+    private void queryWeather() {
+        Cursor c = mContext.getContentResolver().query(WEATHER_URI, WEATHER_PROJECTION, null, null, null);
+        if (c != null) {
+            try {
+
+                WeatherSpec weatherSpec = new WeatherSpec();
+                weatherSpec.forecasts = new ArrayList<>();
+
+                int count = c.getCount();
+                if (count > 0) {
+                    for (int i = 0; i < count; i++) {
+                        c.moveToPosition(i);
+                        if (i == 0) {
+
+                            weatherSpec.location = c.getString(0);
+                            weatherSpec.currentConditionCode = Weather.mapToOpenWeatherMapCondition(c.getInt(2));
+                            weatherSpec.currentCondition = Weather.getConditionString(weatherSpec.currentConditionCode);
+                            //alternatively the following would also be possible
+                            //weatherSpec.currentCondition = c.getString(1);
+
+                            weatherSpec.currentTemp = toKelvin(c.getFloat(3));
+                            weatherSpec.currentHumidity = (int) c.getFloat(4);
+                            weatherSpec.todayMinTemp = toKelvin(c.getFloat(5));
+                            weatherSpec.todayMaxTemp = toKelvin(c.getFloat(6));
+                            weatherSpec.timestamp = (int) (Long.valueOf(c.getString(9)) / 1000);
+                        } else {
+
+                            WeatherSpec.Forecast gbForecast = new WeatherSpec.Forecast();
+                            gbForecast.minTemp = toKelvin(c.getFloat(5));
+                            gbForecast.maxTemp = toKelvin(c.getFloat(6));
+                            gbForecast.conditionCode = Weather.mapToOpenWeatherMapCondition(c.getInt(8));
+                            weatherSpec.forecasts.add(gbForecast);
+                        }
+                    }
+                }
+
+                Weather.getInstance().setWeatherSpec(weatherSpec);
+                GBApplication.deviceService().onSendWeather(weatherSpec);
+
+            } finally {
+                c.close();
+            }
+        }
+
+    }
+
+    private void updateWeather() {
+        Intent updateIntent = new Intent(Intent.ACTION_MAIN)
+                .setClassName(SERVICE_PACKAGE, SERVICE_PACKAGE + ".WeatherService");
+        updateIntent.setAction(SERVICE_PACKAGE + ".ACTION_UPDATE");
+        mContext.startService(updateIntent);
+    }
+
+    private boolean isOmniJawsServiceAvailable() throws NameNotFoundException {
+        final PackageManager pm = mContext.getPackageManager();
+        pm.getPackageInfo("org.omnirom.omnijaws", 0);
+        return true;
+    }
+
+    private void checkSettings() {
+        if (!mInstalled) {
+            return;
+        }
+        final Cursor c = mContext.getContentResolver().query(SETTINGS_URI, SETTINGS_PROJECTION,
+                null, null, null);
+        if (c != null) {
+            int count = c.getCount();
+            if (count == 1) {
+                c.moveToPosition(0);
+                mEnabled = c.getInt(0) == 1 ? true : false;
+                mMetric = c.getInt(1) == 0 ? true : false;
+            }
+        }
+    }
+
+    private int toKelvin(double temperature) {
+        if (mMetric) {
+            return (int) (temperature + 273.15);
+        }
+        return (int) ((temperature - 32) * 0.5555555555555556D + 273.15);
+    }
+
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceCommunicationService.java

@@ -30,6 +30,7 @@ import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.net.Uri;
+import android.os.Handler;
 import android.os.IBinder;
 import android.support.annotation.Nullable;
 import android.support.v4.content.ContextCompat;
@@ -53,6 +54,7 @@ import nodomain.freeyourgadget.gadgetbridge.externalevents.BluetoothPairingReque
 import nodomain.freeyourgadget.gadgetbridge.externalevents.CMWeatherReceiver;
 import nodomain.freeyourgadget.gadgetbridge.externalevents.CalendarReceiver;
 import nodomain.freeyourgadget.gadgetbridge.externalevents.MusicPlaybackReceiver;
+import nodomain.freeyourgadget.gadgetbridge.externalevents.OmniJawsObserver;
 import nodomain.freeyourgadget.gadgetbridge.externalevents.PebbleReceiver;
 import nodomain.freeyourgadget.gadgetbridge.externalevents.PhoneCallReceiver;
 import nodomain.freeyourgadget.gadgetbridge.externalevents.SMSReceiver;
@@ -175,6 +177,7 @@ public class DeviceCommunicationService extends Service implements SharedPrefere
     private AlarmReceiver mAlarmReceiver = null;
     private CalendarReceiver mCalendarReceiver = null;
     private CMWeatherReceiver mCMWeatherReceiver = null;
+    private OmniJawsObserver mOmniJawsObserver = null;
     private Random mRandom = new Random();
 
     private final String[] mMusicActions = {
@@ -588,7 +591,7 @@ public class DeviceCommunicationService extends Service implements SharedPrefere
         LOG.info("Setting broadcast receivers to: " + enable);
 
         if (enable && initialized && coordinator != null && coordinator.supportsCalendarEvents()) {
-            if (mCalendarReceiver == null  && getPrefs().getBoolean("enable_calendar_sync", true)) {
+            if (mCalendarReceiver == null && getPrefs().getBoolean("enable_calendar_sync", true)) {
                 if (!(GBApplication.isRunningMarshmallowOrLater() && ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CALENDAR) == PackageManager.PERMISSION_DENIED)) {
                     IntentFilter calendarIntentFilter = new IntentFilter();
                     calendarIntentFilter.addAction("android.intent.action.PROVIDER_CHANGED");
@@ -632,7 +635,7 @@ public class DeviceCommunicationService extends Service implements SharedPrefere
             if (mMusicPlaybackReceiver == null) {
                 mMusicPlaybackReceiver = new MusicPlaybackReceiver();
                 IntentFilter filter = new IntentFilter();
-                for (String action : mMusicActions){
+                for (String action : mMusicActions) {
                     filter.addAction(action);
                 }
                 registerReceiver(mMusicPlaybackReceiver, filter);
@@ -663,6 +666,14 @@ public class DeviceCommunicationService extends Service implements SharedPrefere
                 mCMWeatherReceiver = new CMWeatherReceiver();
                 registerReceiver(mCMWeatherReceiver, new IntentFilter("GB_UPDATE_WEATHER"));
             }
+            if (mOmniJawsObserver == null && coordinator != null && coordinator.supportsWeather()) {
+                try {
+                    mOmniJawsObserver = new OmniJawsObserver(new Handler());
+                    getContentResolver().registerContentObserver(mOmniJawsObserver.WEATHER_URI, true, mOmniJawsObserver);
+                } catch (PackageManager.NameNotFoundException e) {
+                    //Nothing wrong, it just means we're not running on omnirom.
+                }
+            }
         } else {
             if (mPhoneCallReceiver != null) {
                 unregisterReceiver(mPhoneCallReceiver);
@@ -701,6 +712,9 @@ public class DeviceCommunicationService extends Service implements SharedPrefere
                 unregisterReceiver(mCMWeatherReceiver);
                 mCMWeatherReceiver = null;
             }
+            if (mOmniJawsObserver != null) {
+                getContentResolver().unregisterContentObserver(mOmniJawsObserver);
+            }
         }
     }