RealTimeTalk/app/src/main/java/com/smarthomies/realtimetalk/managers/AuthenticationManager.java

package com.smarthomies.realtimetalk.managers;

import com.smarthomies.realtimetalk.models.db.User;
import com.smarthomies.realtimetalk.models.network.AuthenticationResponse;
import com.smarthomies.realtimetalk.models.network.LoginRequest;
import com.smarthomies.realtimetalk.models.network.RegistrationRequest;
import com.smarthomies.realtimetalk.services.AuthenticationAPIService;
import com.smarthomies.realtimetalk.utils.RTTAppHelper;

import rx.Observable;
import rx.functions.Action0;
import rx.functions.Action1;
import rx.functions.Func1;

/**
 * Created by ensar on 01/11/16.
 */
public class AuthenticationManager {
    public static final String TAG = AuthenticationManager.class.getSimpleName();

    public Observable<AuthenticationResponse> loginUser(String username, String password) {
        return AuthenticationAPIService.getInstance().login(getLoginRequest(username, password))
                .doOnNext(processAuthenticationResponse);
    }

    public Observable<AuthenticationResponse> registerUser(User user, final String username, final String password) {
        RegistrationRequest registrationRequest = getRegistrationRequest(user, username, password);
        return AuthenticationAPIService.getInstance().register(registrationRequest)
                .flatMap(new Func1<AuthenticationResponse, Observable<LoginRequest>>() {
                    @Override
                    public Observable<LoginRequest> call(AuthenticationResponse authenticationResponse) {
                        return Observable.just(getLoginRequest(username, password));
                    }
                })
                .flatMap(requestLogin)
                .doOnNext(processAuthenticationResponse);
    }

    public Observable<Object> logout() {
        return AuthenticationAPIService.getInstance().logout()
                .doOnNext(processLogoutResponse)
                .doOnError(processLogoutFailure);
    }

    private Func1<LoginRequest, Observable<AuthenticationResponse>> requestLogin = new Func1<LoginRequest, Observable<AuthenticationResponse>>() {
        @Override
        public Observable<AuthenticationResponse> call(LoginRequest request) {
            return AuthenticationAPIService.getInstance().login(request);
        }
    };

    private Action1<AuthenticationResponse> processAuthenticationResponse = new Action1<AuthenticationResponse>() {
        @Override
        public void call(AuthenticationResponse authenticationResponse) {
            RTTAppHelper.getInstance().saveToken(authenticationResponse.getToken());
            RTTAppHelper.getInstance().saveUserId(authenticationResponse.getId());
        }
    };

    private Action1<Object> processLogoutResponse = new Action1<Object>() {
        @Override
        public void call(Object object) {
            clearToken();
        }
    };

    private Action1<Throwable> processLogoutFailure = new Action1<Throwable>() {
        @Override
        public void call(Throwable object) {
            clearToken();
        }
    };

    private void clearToken() {
        RTTAppHelper.getInstance().saveToken("");
        RTTAppHelper.getInstance().saveUserId(-1);
    }

    private RegistrationRequest getRegistrationRequest(User user, String username, String password) {
        RegistrationRequest registrationRequest = new RegistrationRequest();
        registrationRequest.setUsername(username);
        registrationRequest.setPassword(password);
        registrationRequest.setEmail(user.getEmail());
        registrationRequest.setFirstName(user.getFirstName());
        registrationRequest.setLastName(user.getLastName());
        return registrationRequest;
    }

    private LoginRequest getLoginRequest(String username, String password) {
        return new LoginRequest(username, password);
    }
}