Display 'me' for device's local number in group membership list.

// FREEBIE

Fixes #1494
Closes #1505

res/values/strings.xml

@@ -169,6 +169,9 @@
     <string name="GroupCreateActivity_creating_group">Creating %1$s&#8230;</string>
     <string name="GroupCreateActivity_cannot_add_non_push_to_existing_group">Cannot add non-TextSecure contacts to an existing TextSecure group</string>
 
+    <!-- GroupMembersDialog -->
+    <string name="GroupMembersDialog_me">Me</string>
+
     <!-- ImportExportActivity -->
     <string name="ImportExportActivity_import">Import</string>
     <string name="ImportExportActivity_export">Export</string>

src/org/thoughtcrime/securesms/GroupMembersDialog.java

@@ -10,6 +10,9 @@ import org.thoughtcrime.securesms.database.DatabaseFactory;
 import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.recipients.Recipients;
 import org.thoughtcrime.securesms.util.GroupUtil;
+import org.thoughtcrime.securesms.util.TextSecurePreferences;
+import org.thoughtcrime.securesms.util.Util;
+import org.whispersystems.textsecure.api.util.InvalidNumberException;
 
 import java.io.IOException;
 import java.util.LinkedList;
@@ -17,6 +20,8 @@ import java.util.List;
 
 public class GroupMembersDialog extends AsyncTask<Void, Void, Recipients> {
 
+  private static final String TAG = GroupMembersDialog.class.getSimpleName();
+
   private final Recipients recipients;
   private final Context    context;
 
@@ -50,10 +55,13 @@ public class GroupMembersDialog extends AsyncTask<Void, Void, Recipients> {
       progress.dismiss();
     }
 
-    List<String> recipientStrings = new LinkedList<String>();
+    List<String> recipientStrings = new LinkedList<>();
+    recipientStrings.add(context.getString(R.string.GroupMembersDialog_me));
 
     for (Recipient recipient : members.getRecipientsList()) {
-      recipientStrings.add(recipient.toShortString());
+      if (!isLocalNumber(recipient)) {
+        recipientStrings.add(recipient.toShortString());
+      }
     }
 
     AlertDialog.Builder builder = new AlertDialog.Builder(context);
@@ -69,4 +77,16 @@ public class GroupMembersDialog extends AsyncTask<Void, Void, Recipients> {
     if (recipients.isGroupRecipient()) execute();
     else                               onPostExecute(recipients);
   }
+
+  private boolean isLocalNumber(Recipient recipient) {
+    try {
+      String localNumber = TextSecurePreferences.getLocalNumber(context);
+      String e164Number  = Util.canonicalizeNumber(context, recipient.getNumber());
+
+      return e164Number != null && e164Number.equals(localNumber);
+    } catch (InvalidNumberException e) {
+      Log.w(TAG, e);
+      return false;
+    }
+  }
 }