Add logging for unread thread ids.

app/src/main/java/org/thoughtcrime/securesms/database/ThreadDatabase.java

@@ -25,6 +25,7 @@ import android.net.Uri;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.arch.core.util.Function;
 
 import com.annimon.stream.Collectors;
 import com.annimon.stream.Stream;
@@ -516,17 +517,21 @@ public class ThreadDatabase extends Database {
     }
   }
 
-  public long getUnreadThreadCount() {
-    SQLiteDatabase db         = databaseHelper.getSignalReadableDatabase();
-    String[]       projection = SqlUtil.buildArgs("COUNT(*)");
-    String         where      = READ + " != " + ReadStatus.READ.serialize() + " AND " + ARCHIVED + " = 0 AND " + MEANINGFUL_MESSAGES + " != 0";
+  public @NonNull Long getUnreadThreadCount() {
+    return getUnreadThreadIdAggregate(SqlUtil.COUNT, cursor -> CursorUtil.getAggregateOrDefault(cursor, 0L, cursor::getLong));
+  }
 
-    try (Cursor cursor = db.query(TABLE_NAME, projection, where, null, null, null, null)) {
-      if (cursor != null && cursor.moveToFirst()) {
-        return cursor.getLong(0);
-      } else {
-        return 0;
-      }
+  public @Nullable String getUnreadThreadIdList() {
+    return getUnreadThreadIdAggregate(SqlUtil.buildArgs("GROUP_CONCAT(" + ID + ")"),
+                                      cursor -> CursorUtil.getAggregateOrDefault(cursor, null, cursor::getString));
+  }
+
+  private @NonNull <T> T getUnreadThreadIdAggregate(@NonNull String[] aggregator, @NonNull Function<Cursor, T> mapCursorToType) {
+    SQLiteDatabase db    = databaseHelper.getSignalReadableDatabase();
+    String         where = READ + " != " + ReadStatus.READ.serialize() + " AND " + ARCHIVED + " = 0 AND " + MEANINGFUL_MESSAGES + " != 0";
+
+    try (Cursor cursor = db.query(TABLE_NAME, aggregator, where, null, null, null, null)) {
+      return mapCursorToType.apply(cursor);
     }
   }
 

app/src/main/java/org/thoughtcrime/securesms/stories/tabs/ConversationListTabRepository.kt

@@ -2,6 +2,7 @@ package org.thoughtcrime.securesms.stories.tabs
 
 import io.reactivex.rxjava3.core.Observable
 import io.reactivex.rxjava3.schedulers.Schedulers
+import org.signal.core.util.logging.Log
 import org.thoughtcrime.securesms.database.DatabaseObserver
 import org.thoughtcrime.securesms.database.SignalDatabase
 import org.thoughtcrime.securesms.dependencies.ApplicationDependencies
@@ -9,15 +10,27 @@ import org.thoughtcrime.securesms.recipients.Recipient
 
 class ConversationListTabRepository {
 
+  companion object {
+    private val TAG = Log.tag(ConversationListTabRepository::class.java)
+  }
+
   fun getNumberOfUnreadConversations(): Observable<Long> {
     return Observable.create<Long> {
-      val listener = DatabaseObserver.Observer {
+      fun refresh() {
         it.onNext(SignalDatabase.threads.unreadThreadCount)
+
+        val ids = SignalDatabase.threads.unreadThreadIdList
+        Log.d(TAG, "Unread threads: { $ids }")
+      }
+
+      val listener = DatabaseObserver.Observer {
+        refresh()
       }
 
       ApplicationDependencies.getDatabaseObserver().registerConversationListObserver(listener)
       it.setCancellable { ApplicationDependencies.getDatabaseObserver().unregisterObserver(listener) }
-      it.onNext(SignalDatabase.threads.unreadThreadCount)
+
+      refresh()
     }.subscribeOn(Schedulers.io())
   }
 

core-util/src/main/java/org/signal/core/util/CursorUtil.java

@@ -3,8 +3,10 @@ package org.signal.core.util;
 import android.database.Cursor;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 
 import java.util.Optional;
+import java.util.function.Function;
 
 
 public final class CursorUtil {
@@ -94,4 +96,12 @@ public final class CursorUtil {
 
     return row.toString();
   }
+
+  public static @Nullable <T> T getAggregateOrDefault(@NonNull Cursor cursor, @Nullable T defaultValue, @NonNull Function<Integer, T> cursorColumnFn) {
+    if (cursor.moveToFirst()) {
+      return cursorColumnFn.apply(0);
+    } else {
+      return defaultValue;
+    }
+  }
 }

core-util/src/main/java/org/signal/core/util/SqlUtil.kt

@@ -15,6 +15,9 @@ object SqlUtil {
   /** The maximum number of arguments (i.e. question marks) allowed in a SQL statement.  */
   private const val MAX_QUERY_ARGS = 999
 
+  @JvmField
+  val COUNT = arrayOf("COUNT(*)")
+
   @JvmStatic
   fun tableExists(db: SupportSQLiteDatabase, table: String): Boolean {
     db.query("SELECT name FROM sqlite_master WHERE type=? AND name=?", arrayOf("table", table)).use { cursor ->