Fix NPE when 'from' missing in NotificationInd

Fixes #2806
// FREEBIE

src/org/thoughtcrime/securesms/database/MmsDatabase.java

@@ -22,6 +22,7 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
 import android.net.Uri;
+import android.support.annotation.NonNull;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.Log;
@@ -339,15 +340,13 @@ public class MmsDatabase extends MessagingDatabase {
     }
   }
 
-  private long getThreadIdFor(NotificationInd notification) throws RecipientFormattingException {
-    try {
-      EncodedStringValue encodedString = notification.getFrom();
-      String fromString                = new String(encodedString.getTextString(), CharacterSets.MIMENAME_ISO_8859_1);
+  private long getThreadIdFor(@NonNull NotificationInd notification) {
+    String fromString = notification.getFrom() != null && notification.getFrom().getTextString() != null
+                      ? Util.toIsoString(notification.getFrom().getTextString())
+                      : "";
     Recipients recipients = RecipientFactory.getRecipientsFromString(context, fromString, false);
+    if (recipients.isEmpty()) recipients = new Recipients(Recipient.getUnknownRecipient(context));
     return DatabaseFactory.getThreadDatabase(context).getThreadIdFor(recipients);
-    } catch (UnsupportedEncodingException e) {
-      throw new AssertionError(e);
-    }
   }
 
   public Cursor getMessage(long messageId) {
@@ -646,21 +645,20 @@ public class MmsDatabase extends MessagingDatabase {
                               (retrieved.isPushMessage() ? Types.PUSH_MESSAGE_BIT : 0));
   }
 
-  public Pair<Long, Long> insertMessageInbox(NotificationInd notification) {
-    try {
+  public Pair<Long, Long> insertMessageInbox(@NonNull NotificationInd notification) {
     SQLiteDatabase     db              = databaseHelper.getWritableDatabase();
     MmsAddressDatabase addressDatabase = DatabaseFactory.getMmsAddressDatabase(context);
     long               threadId        = getThreadIdFor(notification);
     PduHeaders         headers         = notification.getPduHeaders();
     ContentValues      contentValues   = getContentValuesFromHeader(headers);
 
-      Log.w("MmsDatabse", "Message received type: " + headers.getOctet(PduHeaders.MESSAGE_TYPE));
+    Log.w(TAG, "Message received type: " + headers.getOctet(PduHeaders.MESSAGE_TYPE));
 
     contentValues.put(MESSAGE_BOX, Types.BASE_INBOX_TYPE);
     contentValues.put(THREAD_ID, threadId);
     contentValues.put(STATUS, Status.DOWNLOAD_INITIALIZED);
     contentValues.put(DATE_RECEIVED, System.currentTimeMillis() / 1000);
-      contentValues.put(READ, org.thoughtcrime.securesms.util.Util.isDefaultSmsProvider(context) ? 0 : 1);
+    contentValues.put(READ, Util.isDefaultSmsProvider(context) ? 0 : 1);
 
     if (!contentValues.containsKey(DATE_SENT))
       contentValues.put(DATE_SENT, contentValues.getAsLong(DATE_RECEIVED));
@@ -668,16 +666,7 @@ public class MmsDatabase extends MessagingDatabase {
     long messageId = db.insert(TABLE_NAME, null, contentValues);
     addressDatabase.insertAddressesForId(messageId, headers);
 
-//      notifyConversationListeners(threadId);
-//      DatabaseFactory.getThreadDatabase(context).update(threadId);
-//      DatabaseFactory.getThreadDatabase(context).setUnread(threadId);
-//      Trimmer.trimThread(context, threadId);
-
-      return new Pair<Long, Long>(messageId, threadId);
-    } catch (RecipientFormattingException rfe) {
-      Log.w("MmsDatabase", rfe);
-      return new Pair<Long, Long>(-1L, -1L);
-    }
+    return new Pair<>(messageId, threadId);
   }
 
   public void markIncomingNotificationReceived(long threadId) {