Implement copy public key action for group chats

res/menu/conversation_context.xml

@@ -16,6 +16,11 @@
           android:icon="?menu_copy_icon"
           app:showAsAction="always" />
 
+    <item android:title="@string/activity_conversation_copy_public_key_button_title"
+        android:id="@+id/menu_context_copy_public_key"
+        android:icon="@drawable/ic_profile_default"
+        app:showAsAction="always" />
+
     <!-- <item android:title="@string/conversation_context__menu_forward_message"
           android:id="@+id/menu_context_forward"
           android:icon="?menu_forward_icon"

res/values/strings.xml

@@ -1613,5 +1613,7 @@
     <!-- Scan QR code fragment -->
     <string name="fragment_scan_qr_code_title">Scan QR Code</string>
     <string name="fragment_scan_qr_code_explanation">Scan the QR code of the person you\'d like to securely message. They can find their QR code by going into Loki Messenger\'s in-app settings and clicking \"Show QR Code\".</string>
+    <!-- Conversation activity -->
+    <string name="activity_conversation_copy_public_key_button_title">Copy public key</string>
 
 </resources>

src/org/thoughtcrime/securesms/conversation/ConversationFragment.java

@@ -410,13 +410,15 @@ public class ConversationFragment extends Fragment
     if (isGroupChat) {
       boolean isLokiPublicChat = recipient.getName() != null && recipient.getName().equals("Loki Public Chat");
       int selectedMessageCount = messageRecords.size();
+      boolean isSentByUser = ((MessageRecord)messageRecords.toArray()[0]).isOutgoing();
+      menu.findItem(R.id.menu_context_copy_public_key).setVisible(isLokiPublicChat && selectedMessageCount == 1 && !isSentByUser);
       menu.findItem(R.id.menu_context_reply).setVisible(isLokiPublicChat && selectedMessageCount == 1);
       LokiAPIDatabase lokiAPIDatabase = DatabaseFactory.getLokiAPIDatabase(getContext());
-      boolean isSentByUser = ((MessageRecord)messageRecords.toArray()[0]).isOutgoing();
       boolean userCanModerate = lokiAPIDatabase.isModerator(LokiGroupChatAPI.getPublicChatServerID(), LokiGroupChatAPI.getPublicChatServer());
       boolean isDeleteOptionVisible = isLokiPublicChat && selectedMessageCount == 1 && (isSentByUser || userCanModerate);
       menu.findItem(R.id.menu_context_delete_message).setVisible(isDeleteOptionVisible);
     } else {
+      menu.findItem(R.id.menu_context_copy_public_key).setVisible(false);
       menu.findItem(R.id.menu_context_delete_message).setVisible(true);
     }
   }
@@ -493,6 +495,11 @@ public class ConversationFragment extends Fragment
         clipboard.setText(result);
   }
 
+  private void handleCopyPublicKey(MessageRecord messageRecord) {
+    ClipboardManager clipboard = (ClipboardManager) getActivity().getSystemService(Context.CLIPBOARD_SERVICE);
+    clipboard.setText(messageRecord.getRecipient().getAddress().toString());
+  }
+
   private void handleDeleteMessages(final Set<MessageRecord> messageRecords) {
     int                 messagesCount = messageRecords.size();
     AlertDialog.Builder builder       = new AlertDialog.Builder(getActivity());
@@ -1121,6 +1128,10 @@ public class ConversationFragment extends Fragment
           handleCopyMessage(getListAdapter().getSelectedItems());
           actionMode.finish();
           return true;
+        case R.id.menu_context_copy_public_key:
+          handleCopyPublicKey((MessageRecord) getListAdapter().getSelectedItems().toArray()[0]);
+          actionMode.finish();
+          return true;
         case R.id.menu_context_delete_message:
           handleDeleteMessages(getListAdapter().getSelectedItems());
           actionMode.finish();