Implement RSS feeds

build.gradle

@@ -5,6 +5,7 @@ buildscript {
     ext.kotlin_version = "1.3.31"
     ext.kovenant_version = "3.3.0"
     ext.identicon_version = "v11"
+    ext.rss_parser_version = "2.0.4"
 
     repositories {
         google()
@@ -179,6 +180,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation "nl.komponents.kovenant:kovenant:$kovenant_version"
     implementation "com.github.lelloman:android-identicons:$identicon_version"
+    implementation "com.prof.rssparser:rssparser:$rss_parser_version"
 }
 
 def canonicalVersionCode = 9

src/org/thoughtcrime/securesms/ApplicationContext.java

@@ -57,6 +57,7 @@ import org.thoughtcrime.securesms.logging.UncaughtExceptionLogger;
 import org.thoughtcrime.securesms.loki.BackgroundPollWorker;
 import org.thoughtcrime.securesms.loki.LokiAPIDatabase;
 import org.thoughtcrime.securesms.loki.LokiGroupChatPoller;
+import org.thoughtcrime.securesms.loki.LokiRSSFeedPoller;
 import org.thoughtcrime.securesms.notifications.MessageNotifier;
 import org.thoughtcrime.securesms.notifications.NotificationChannels;
 import org.thoughtcrime.securesms.providers.BlobProvider;
@@ -83,16 +84,16 @@ import org.whispersystems.signalservice.loki.api.LokiGroupChatAPI;
 import org.whispersystems.signalservice.loki.api.LokiLongPoller;
 import org.whispersystems.signalservice.loki.api.LokiP2PAPI;
 import org.whispersystems.signalservice.loki.api.LokiP2PAPIDelegate;
+import org.whispersystems.signalservice.loki.api.LokiRSSFeed;
 
 import java.security.Security;
+import java.util.ArrayList;
 import java.util.HashSet;
-import java.util.List;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
 import dagger.ObjectGraph;
 import kotlin.Unit;
-import kotlin.jvm.functions.Function1;
 import network.loki.messenger.BuildConfig;
 
 /**
@@ -118,6 +119,8 @@ public class ApplicationContext extends MultiDexApplication implements Dependenc
   // Loki
   private LokiLongPoller lokiLongPoller = null;
   private LokiGroupChatPoller lokiPublicChatPoller = null;
+  private LokiRSSFeedPoller lokiNewsFeedPoller = null;
+  private LokiRSSFeedPoller lokiMessengerUpdatesFeedPoller = null;
   public SignalCommunicationModule communicationModule;
 
   private volatile boolean isAppVisible;
@@ -409,15 +412,11 @@ public class ApplicationContext extends MultiDexApplication implements Dependenc
     if (userHexEncodedPublicKey == null) return;
     LokiAPIDatabase lokiAPIDatabase = DatabaseFactory.getLokiAPIDatabase(this);
     Context context = this;
-    lokiLongPoller = new LokiLongPoller(userHexEncodedPublicKey, lokiAPIDatabase, new Function1<List<SignalServiceProtos.Envelope>, Unit>() {
-
-      @Override
-      public Unit invoke(List<SignalServiceProtos.Envelope> protos) {
-        for (SignalServiceProtos.Envelope proto : protos) {
-          new PushContentReceiveJob(context).processEnvelope(new SignalServiceEnvelope(proto));
-        }
-        return Unit.INSTANCE;
+    lokiLongPoller = new LokiLongPoller(userHexEncodedPublicKey, lokiAPIDatabase, protos -> {
+      for (SignalServiceProtos.Envelope proto : protos) {
+        new PushContentReceiveJob(context).processEnvelope(new SignalServiceEnvelope(proto));
       }
+      return Unit.INSTANCE;
     });
   }
 
@@ -430,19 +429,54 @@ public class ApplicationContext extends MultiDexApplication implements Dependenc
     return new LokiGroupChat(LokiGroupChatAPI.getPublicChatServerID(), LokiGroupChatAPI.getPublicChatServer(), "Loki Public Chat", true);
   }
 
-  private void setUpPublicChatIfNeeded() {
-    if (lokiPublicChatPoller != null) return;
-    LokiGroupChat lokiPublicChat = this.lokiPublicChat();
-    lokiPublicChatPoller = new LokiGroupChatPoller(this, lokiPublicChat);
-    boolean isPublicChatSetUp = TextSecurePreferences.isPublicChatSetUp(this);
-    if (isPublicChatSetUp) return;
-    GroupManager.createGroup(lokiPublicChat.getId(), this, new HashSet<>(), null, "Loki Public Chat", false);
-    TextSecurePreferences.markPublicChatSetUp(this);
+  private LokiRSSFeed lokiNewsFeed() {
+    return new LokiRSSFeed("loki.network.feed", "https://loki.network/feed/", "Loki News", true);
+  }
+
+  private LokiRSSFeed lokiMessengerUpdatesFeed() {
+    return new LokiRSSFeed("loki.network.messenger-updates.feed", "https://loki.network/category/messenger-updates/feed", "Loki Messenger Updates", false);
+  }
+
+  public void createGroupChatsIfNeeded() {
+    LokiGroupChat publicChat = lokiPublicChat();
+    boolean isChatSetUp = TextSecurePreferences.isChatSetUp(this, publicChat.getId());
+    if (!isChatSetUp || !publicChat.isDeletable()) {
+      GroupManager.createGroup(publicChat.getId(), this, new HashSet<>(), null, publicChat.getDisplayName(), false);
+      TextSecurePreferences.markChatSetUp(this, publicChat.getId());
+    }
+  }
+
+  public void createRSSFeedsIfNeeded() {
+    ArrayList<LokiRSSFeed> feeds = new ArrayList<>();
+    feeds.add(lokiNewsFeed());
+    feeds.add(lokiMessengerUpdatesFeed());
+    for (LokiRSSFeed feed : feeds) {
+      boolean isFeedSetUp = TextSecurePreferences.isChatSetUp(this, feed.getId());
+      if (!isFeedSetUp || !feed.isDeletable()) {
+        GroupManager.createGroup(feed.getId(), this, new HashSet<>(), null, feed.getDisplayName(), false);
+        TextSecurePreferences.markChatSetUp(this, feed.getId());
+      }
+    }
+  }
+
+  private void createGroupChatPollersIfNeeded() {
+    if (lokiPublicChatPoller == null) lokiPublicChatPoller = new LokiGroupChatPoller(this, lokiPublicChat());
   }
 
-  public void startPublicChatPollingIfNeeded() {
-    setUpPublicChatIfNeeded();
+  private void createRSSFeedPollersIfNeeded() {
+    if (lokiNewsFeedPoller == null) lokiNewsFeedPoller = new LokiRSSFeedPoller(this, lokiNewsFeed());
+    if (lokiMessengerUpdatesFeedPoller == null) lokiMessengerUpdatesFeedPoller = new LokiRSSFeedPoller(this, lokiMessengerUpdatesFeed());
+  }
+
+  public void startGroupChatPollersIfNeeded() {
+    createGroupChatPollersIfNeeded();
     lokiPublicChatPoller.startIfNeeded();
   }
+
+  public void startRSSFeedPollersIfNeeded() {
+    createRSSFeedPollersIfNeeded();
+    lokiNewsFeedPoller.startIfNeeded();
+    lokiMessengerUpdatesFeedPoller.startIfNeeded();
+  }
   // endregion
 }

src/org/thoughtcrime/securesms/ConversationListActivity.java

@@ -82,7 +82,11 @@ public class ConversationListActivity extends PassphraseRequiredActionBarActivit
     dynamicTheme.onCreate(this);
     dynamicLanguage.onCreate(this);
     if (TextSecurePreferences.getLocalNumber(this) != null) {
-      ApplicationContext.getInstance(this).startPublicChatPollingIfNeeded();
+      ApplicationContext application = ApplicationContext.getInstance(this);
+      application.createGroupChatsIfNeeded();
+      application.createRSSFeedsIfNeeded();
+      application.startGroupChatPollersIfNeeded();
+      application.startRSSFeedPollersIfNeeded();
     }
   }
 

src/org/thoughtcrime/securesms/loki/LokiRSSFeedPoller.kt

@@ -0,0 +1,71 @@
+package org.thoughtcrime.securesms.loki
+
+import android.content.Context
+import android.os.Handler
+import android.util.Log
+import com.prof.rssparser.Parser
+import kotlinx.coroutines.*
+import org.thoughtcrime.securesms.jobs.PushDecryptJob
+import org.whispersystems.libsignal.util.guava.Optional
+import org.whispersystems.signalservice.api.messages.SignalServiceContent
+import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage
+import org.whispersystems.signalservice.api.messages.SignalServiceGroup
+import org.whispersystems.signalservice.api.push.SignalServiceAddress
+import org.whispersystems.signalservice.loki.api.LokiRSSFeed
+import java.text.SimpleDateFormat
+
+class LokiRSSFeedPoller(private val context: Context, private val feed: LokiRSSFeed) {
+    private val handler = Handler()
+    private val job = Job()
+    private var hasStarted = false
+
+    private val task = object : Runnable {
+
+        override fun run() {
+            poll()
+            handler.postDelayed(this, interval)
+        }
+    }
+
+    companion object {
+        private val interval: Long = 8 * 60 * 1000
+    }
+
+    fun startIfNeeded() {
+        if (hasStarted) return
+        task.run()
+        hasStarted = true
+    }
+
+    fun stop() {
+        handler.removeCallbacks(task)
+        job.cancel()
+        hasStarted = false
+    }
+
+    private fun poll() {
+        CoroutineScope(Dispatchers.Main).launch {
+            try {
+                val url = feed.url
+                val parser = Parser()
+                val items = parser.getArticles(url)
+                items.reversed().forEach { item ->
+                    val title = item.title ?: return@forEach
+                    val description = item.description ?: return@forEach
+                    val dateAsString = item.pubDate ?: return@forEach
+                    val formatter = SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss Z") // e.g. Tue, 27 Aug 2019 03:52:05 +0000
+                    val date = formatter.parse(dateAsString)
+                    val timestamp = date.time
+                    val body = "$title<br>$description"
+                    val id = feed.id.toByteArray()
+                    val x1 = SignalServiceGroup(SignalServiceGroup.Type.UPDATE, id, null, null, null)
+                    val x2 = SignalServiceDataMessage(timestamp, x1, null, body)
+                    val x3 = SignalServiceContent(x2, "Loki", SignalServiceAddress.DEFAULT_DEVICE_ID, timestamp, false)
+                    PushDecryptJob(context).handleTextMessage(x3, x2, Optional.absent())
+                }
+            } catch (exception: Exception) {
+                Log.d("Loki", "Couldn't update RSS feed with ID: $feed.id.")
+            }
+        }
+    }
+}

src/org/thoughtcrime/securesms/util/TextSecurePreferences.java

@@ -1162,12 +1162,12 @@ public class TextSecurePreferences {
     setLongPreference(context, "background_poll_time", backgroundPollTime);
   }
 
-  public static boolean isPublicChatSetUp(Context context) {
-    return getBooleanPreference(context, "is_public_chat_set_up", false);
+  public static boolean isChatSetUp(Context context, String id) {
+    return getBooleanPreference(context, "is_chat_set_up" + "?chat=" + id, false);
   }
 
-  public static void markPublicChatSetUp(Context context) {
-    setBooleanPreference(context, "is_public_chat_set_up", true);
+  public static void markChatSetUp(Context context, String id) {
+    setBooleanPreference(context, "is_chat_set_up" + "?chat=" + id, true);
   }
   // endregion
 }