add "Invite Friends" to main menu (#3196)

* add "Invite Friends" to main menu

* tweak invitation message

* add back "new chat" menu item

src/main/java/org/thoughtcrime/securesms/ConversationListActivity.java

@@ -389,6 +389,9 @@ public class ConversationListActivity extends PassphraseRequiredActionBarActivit
       case R.id.menu_new_chat:
         createChat();
         return true;
+      case R.id.menu_invite_friends:
+        shareInvite();
+        return true;
       case R.id.menu_settings:
         startActivity(new Intent(this, ApplicationPreferencesActivity.class));
         return true;
@@ -486,6 +489,14 @@ public class ConversationListActivity extends PassphraseRequiredActionBarActivit
     startActivity(intent);
   }
 
+  private void shareInvite() {
+    Intent intent = new Intent(Intent.ACTION_SEND);
+    intent.setType("text/plain");
+    String inviteURL = Util.QrDataToInviteURL(DcHelper.getContext(this).getSecurejoinQr(0));
+    intent.putExtra(Intent.EXTRA_TEXT, getString(R.string.invite_friends_text, inviteURL));
+    startActivity(Intent.createChooser(intent, getString(R.string.chat_share_with_title)));
+  }
+
   @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
     super.onActivityResult(requestCode, resultCode, data);

src/main/res/menu/text_secure_normal.xml

@@ -7,6 +7,9 @@
           android:icon="@drawable/baseline_qr_code_24"
           app:showAsAction="always"/>
 
+    <item android:title="@string/invite_friends"
+          android:id="@+id/menu_invite_friends" />
+
     <item android:title="@string/menu_new_chat"
           android:id="@+id/menu_new_chat" />
 

src/main/res/values/strings.xml

@@ -232,6 +232,9 @@
     <string name="menu_message_details">Message Info</string>
     <string name="menu_copy_to_clipboard">Copy to Clipboard</string>
     <string name="share_invite_link">Share Invite Link</string>
+    <string name="invite_friends">Invite Friends</string>
+    <!-- %1$s is replaced by the user's invitation link ("https://i.delta.chat/...") -->
+    <string name="invite_friends_text">Contact me on Delta Chat:\n%1$s</string>
     <string name="menu_copy_selection_to_clipboard">Copy Selection</string>
     <string name="menu_copy_link_to_clipboard">Copy Link</string>
     <string name="menu_copy_text_to_clipboard">Copy Text</string>