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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
package org.mozilla.focus.session;
import androidx.annotation.NonNull;
import androidx.annotation.VisibleForTesting;
import org.mozilla.focus.architecture.NonNullLiveData;
import org.mozilla.focus.architecture.NonNullMutableLiveData;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Sessions are managed by this global SessionManager instance.
*/
public class SessionManager {
private static final SessionManager INSTANCE = new SessionManager();
private NonNullMutableLiveData<List<Session>> sessions;
private String currentSessionUUID;
public static SessionManager getInstance() {
return INSTANCE;
}
private SessionManager() {
this.sessions = new NonNullMutableLiveData<>(
Collections.unmodifiableList(Collections.<Session>emptyList()));
}
/**
* Is there at least one browsing session?
*/
public boolean hasSession() {
return !sessions.getValue().isEmpty();
}
/**
* Get the current session. This method will throw an exception if there's no active session.
*/
public Session getCurrentSession() {
if (currentSessionUUID == null) {
throw new IllegalAccessError("There's no active session");
}
return getSessionByUUID(currentSessionUUID);
}
public boolean isCurrentSession(@NonNull Session session) {
return session.getUUID().equals(currentSessionUUID);
}
public boolean hasSessionWithUUID(@NonNull String uuid) {
for (Session session : sessions.getValue()) {
if (uuid.equals(session.getUUID())) {
return true;
}
}
return false;
}
public Session getSessionByUUID(@NonNull String uuid) {
for (Session session : sessions.getValue()) {
if (uuid.equals(session.getUUID())) {
return session;
}
}
throw new IllegalAccessError("There's no active session with UUID " + uuid);
}
public int getNumberOfSessions() {
return sessions.getValue().size();
}
public int getPositionOfCurrentSession() {
if (currentSessionUUID == null) {
return -1;
}
for (int i = 0; i < this.sessions.getValue().size(); i++) {
final Session session = this.sessions.getValue().get(i);
if (session.getUUID().equals(currentSessionUUID)) {
return i;
}
}
return -1;
}
public NonNullLiveData<List<Session>> getSessions() {
return sessions;
}
public void createSession(@NonNull Source source, @NonNull String url) {
final Session session = new Session(source, url);
addSession(session);
}
private void addSession(Session session) {
currentSessionUUID = session.getUUID();
final List<Session> sessions = new ArrayList<>(this.sessions.getValue());
sessions.add(session);
this.sessions.setValue(Collections.unmodifiableList(sessions));
}
/**
* Remove all sessions.
*/
public void removeAllSessions() {
currentSessionUUID = null;
sessions.setValue(Collections.unmodifiableList(Collections.<Session>emptyList()));
}
/**
* Remove the current (selected) session.
*/
public void removeCurrentSession() {
removeSession(currentSessionUUID);
}
@VisibleForTesting void removeSession(String uuid) {
final List<Session> sessions = new ArrayList<>();
int removedFromPosition = -1;
for (int i = 0; i < this.sessions.getValue().size(); i++) {
final Session currentSession = this.sessions.getValue().get(i);
if (currentSession.getUUID().equals(uuid)) {
removedFromPosition = i;
continue;
}
sessions.add(currentSession);
}
if (removedFromPosition == -1) {
return;
}
if (sessions.isEmpty()) {
currentSessionUUID = null;
} else {
final Session currentSession = sessions.get(
Math.min(removedFromPosition, sessions.size() - 1));
currentSessionUUID = currentSession.getUUID();
}
this.sessions.setValue(sessions);
}
}