make room persistant when changing subject or other muc options

src/main/java/eu/siacs/conversations/entities/MucOptions.java

@@ -227,6 +227,10 @@ public class MucOptions {
 		return hasFeature("muc_nonanonymous");
 	}
 
+	public boolean persistent() {
+		return hasFeature("muc_persistent");
+	}
+
 	public void deleteUser(String name) {
 		for (int i = 0; i < users.size(); ++i) {
 			if (users.get(i).getName().equals(name)) {

src/main/java/eu/siacs/conversations/services/XmppConnectionService.java

@@ -1544,6 +1544,18 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		});
 	}
 
+	public void pushSubjectToConference(final Conversation conference, final String subject) {
+		MessagePacket packet = this.getMessageGenerator().conferenceSubject(conference, subject);
+		this.sendMessagePacket(conference.getAccount(), packet);
+		final MucOptions mucOptions = conference.getMucOptions();
+		final MucOptions.User self = mucOptions.getSelf();
+		if (!mucOptions.persistent() && self.getAffiliation().ranks(MucOptions.Affiliation.OWNER)) {
+			Bundle options = new Bundle();
+			options.putString("muc#roomconfig_persistentroom", "1");
+			this.pushConferenceConfiguration(conference,options,null);
+		}
+	}
+
 	public void changeAffiliationInConference(final Conversation conference, Jid user, MucOptions.Affiliation affiliation, final OnAffiliationChanged callback) {
 		final Jid jid = user.toBareJid();
 		IqPacket request = this.mIqGenerator.changeAffiliation(conference, jid, affiliation.toString());

src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java

@@ -39,7 +39,6 @@ import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.services.XmppConnectionService.OnMucRosterUpdate;
 import eu.siacs.conversations.services.XmppConnectionService.OnConversationUpdate;
 import eu.siacs.conversations.xmpp.jid.Jid;
-import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 
 public class ConferenceDetailsActivity extends XmppActivity implements OnConversationUpdate, OnMucRosterUpdate, XmppConnectionService.OnAffiliationChanged, XmppConnectionService.OnRoleChanged, XmppConnectionService.OnConferenceOptionsPushed {
 	public static final String ACTION_VIEW_MUC = "view_muc";
@@ -63,7 +62,6 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 	private ImageButton mChangeConferenceSettingsButton;
 	private Button mInviteButton;
 	private String uuid = null;
-	private List<User> users = new ArrayList<>();
 	private User mSelectedUser = null;
 
 	private boolean mAdvancedMode = false;
@@ -125,6 +123,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 					Bundle options = new Bundle();
 					options.putString("muc#roomconfig_membersonly", values[0] ? "1" : "0");
 					options.putString("muc#roomconfig_whois", values[1] ? "anyone" : "moderators");
+					options.putString("muc#roomconfig_persistentroom", "1");
 					xmppConnectionService.pushConferenceConfiguration(mConversation,
 							options,
 							ConferenceDetailsActivity.this);
@@ -133,6 +132,13 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 			builder.create().show();
 		}
 	};
+	private OnValueEdited onSubjectEdited = new OnValueEdited() {
+
+		@Override
+		public void onValueEdited(String value) {
+			xmppConnectionService.pushSubjectToConference(mConversation,value);
+		}
+	};
 
 	@Override
 	public void onConversationUpdate() {
@@ -202,17 +208,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 				break;
 			case R.id.action_edit_subject:
 				if (mConversation != null) {
-					quickEdit(mConversation.getName(), new OnValueEdited() {
+					quickEdit(mConversation.getName(),this.onSubjectEdited);
-
-						@Override
-						public void onValueEdited(String value) {
-							MessagePacket packet = xmppConnectionService
-								.getMessageGenerator().conferenceSubject(
-										mConversation, value);
-							xmppConnectionService.sendMessagePacket(
-									mConversation.getAccount(), packet);
-						}
-					});
 				}
 				break;
 			case R.id.action_save_as_bookmark:
@@ -277,7 +273,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 				if (contact != null) {
 					name = contact.getDisplayName();
 				} else {
-					name = user.getName();
+					name = user.getJid().toBareJid().toString();
 				}
 				menu.setHeaderTitle(name);
 				MenuItem startConversation = menu.findItem(R.id.start_conversation);
@@ -433,8 +429,6 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 				mChangeConferenceSettingsButton.setVisibility(View.GONE);
 			}
 		}
-		this.users.clear();
-		this.users.addAll(mucOptions.getUsers());
 		LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 		membersView.removeAllViews();
 		for (final User user : mConversation.getMucOptions().getUsers()) {