Added single purpose app integration

Antennapod will now import subscriptions from AntennaPodSP (https://github.com/danieloeh/AntennaPodSP) forks when launched

AndroidManifest.xml

@@ -465,6 +465,11 @@
                     android:scheme="package"/>
             </intent-filter>
         </receiver>
+        <receiver android:name=".receiver.SPAReceiver">
+            <intent-filter>
+                <action android:name="de.danoeh.antennapdsp.intent.SP_APPS_QUERY_FEEDS_RESPONSE"/>
+            </intent-filter>
+        </receiver>
     </application>
 
 </manifest>

res/values/strings.xml

@@ -350,4 +350,8 @@
     <string name="in_queue_label">Episode is in the queue</string>
     <string name="new_episodes_count_label">Number of new episodes</string>
     <string name="in_progress_episodes_count_label">Number of episodes you have started listening to</string>
+
+    <!-- AntennaPodSP -->
+
+    <string name="sp_apps_importing_feeds_msg">Importing subscriptions from single-purpose apps&#8230;</string>
 </resources>

src/de/danoeh/antennapod/PodcastApp.java

@@ -7,6 +7,7 @@ import de.danoeh.antennapod.asynctask.ImageLoader;
 import de.danoeh.antennapod.feed.EventDistributor;
 import de.danoeh.antennapod.preferences.PlaybackPreferences;
 import de.danoeh.antennapod.preferences.UserPreferences;
+import de.danoeh.antennapod.spa.SPAUtil;
 
 /** Main application class. */
 public class PodcastApp extends Application {
@@ -31,6 +32,8 @@ public class PodcastApp extends Application {
 		UserPreferences.createInstance(this);
 		PlaybackPreferences.createInstance(this);
 		EventDistributor.getInstance();
+
+        SPAUtil.sendSPAppsQueryFeedsIntent(this);
 	}
 
 	@Override

src/de/danoeh/antennapod/receiver/SPAReceiver.java

@@ -0,0 +1,55 @@
+package de.danoeh.antennapod.receiver;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.util.Log;
+import android.widget.Toast;
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.feed.Feed;
+import de.danoeh.antennapod.storage.DownloadRequestException;
+import de.danoeh.antennapod.storage.DownloadRequester;
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.Arrays;
+import java.util.Date;
+
+/**
+ * Receives intents from AntennaPod Single Purpose apps
+ */
+public class SPAReceiver extends BroadcastReceiver{
+    private static final String TAG = "SPAReceiver";
+
+    public static final String ACTION_SP_APPS_QUERY_FEEDS = "de.danoeh.antennapdsp.intent.SP_APPS_QUERY_FEEDS";
+    public static final String ACTION_SP_APPS_QUERY_FEEDS_REPSONSE = "de.danoeh.antennapdsp.intent.SP_APPS_QUERY_FEEDS_RESPONSE";
+    public static final String ACTION_SP_APPS_QUERY_FEEDS_REPSONSE_FEEDS_EXTRA = "feeds";
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        if (StringUtils.equals(intent.getAction(), ACTION_SP_APPS_QUERY_FEEDS_REPSONSE)) {
+            if (AppConfig.DEBUG) Log.d(TAG, "Received SP_APPS_QUERY_RESPONSE");
+            if (intent.hasExtra(ACTION_SP_APPS_QUERY_FEEDS_REPSONSE_FEEDS_EXTRA)) {
+                String[] feedUrls = intent.getStringArrayExtra(ACTION_SP_APPS_QUERY_FEEDS_REPSONSE_FEEDS_EXTRA);
+                if (feedUrls != null) {
+                    if (AppConfig.DEBUG) Log.d(TAG, "Received feeds list: " + Arrays.toString(feedUrls));
+                    for (String url : feedUrls) {
+                        Feed f  = new Feed(url, new Date());
+                        try {
+                            DownloadRequester.getInstance().downloadFeed(context, f);
+                        } catch (DownloadRequestException e) {
+                            Log.e(TAG, "Error while trying to add feed " + url);
+                            e.printStackTrace();
+                        }
+                    }
+                    Toast.makeText(context, R.string.sp_apps_importing_feeds_msg, Toast.LENGTH_LONG).show();
+
+                } else {
+                    Log.e(TAG, "Received invalid SP_APPS_QUERY_REPSONSE: extra was null");
+                }
+            } else {
+                Log.e(TAG, "Received invalid SP_APPS_QUERY_RESPONSE: Contains no extra");
+            }
+        }
+    }
+}

src/de/danoeh/antennapod/spa/SPAUtil.java

@@ -0,0 +1,66 @@
+package de.danoeh.antennapod.spa;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+import android.util.Log;
+import de.danoeh.antennapod.AppConfig;
+import de.danoeh.antennapod.receiver.SPAReceiver;
+
+/**
+ * Provides methods related to AntennaPodSP (https://github.com/danieloeh/AntennaPodSP)
+ */
+public class SPAUtil {
+    private static final String TAG = "SPAUtil";
+
+    private static final String PREF_HAS_QUERIED_SP_APPS = "prefSPAUtil.hasQueriedSPApps";
+
+    private SPAUtil() {
+    }
+
+
+    /**
+     * Sends an ACTION_SP_APPS_QUERY_FEEDS intent to all AntennaPod Single Purpose apps.
+     * The receiving single purpose apps will then send their feeds back to AntennaPod via an
+     * ACTION_SP_APPS_QUERY_FEEDS_RESPONSE intent.
+     * This intent will only be sent once.
+     *
+     * @return True if an intent was sent, false otherwise (for example if the intent has already been
+     * sent before.
+     */
+    public static synchronized boolean sendSPAppsQueryFeedsIntent(Context context) {
+        if (context == null) throw new IllegalArgumentException("context = null");
+        final Context appContext = context.getApplicationContext();
+        if (appContext == null) {
+            Log.wtf(TAG, "Unable to get application context");
+            return false;
+        }
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(appContext);
+        if (!prefs.getBoolean(PREF_HAS_QUERIED_SP_APPS, false)) {
+            appContext.sendBroadcast(new Intent(SPAReceiver.ACTION_SP_APPS_QUERY_FEEDS));
+            if (AppConfig.DEBUG) Log.d(TAG, "Sending SP_APPS_QUERY_FEEDS intent");
+
+            SharedPreferences.Editor editor = prefs.edit();
+            editor.putBoolean(PREF_HAS_QUERIED_SP_APPS, true);
+            editor.commit();
+
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Resets all preferences created by this class. Should only be used for debug purposes.
+     */
+    public static void resetSPAPreferences(Context c) {
+        if (AppConfig.DEBUG) {
+            if (c == null) throw new IllegalArgumentException("c = null");
+            SharedPreferences.Editor editor = PreferenceManager
+                    .getDefaultSharedPreferences(c.getApplicationContext()).edit();
+            editor.putBoolean(PREF_HAS_QUERIED_SP_APPS, false);
+            editor.commit();
+        }
+    }
+}