com.howareyoudoing.data.net.RestApiImpl.java Source code

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Here is the source code for com.howareyoudoing.data.net.RestApiImpl.java

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/**
 * Copyright (C) 2015 Fernando Cejas Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.howareyoudoing.data.net;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

import com.howareyoudoing.data.entity.SingleUser;
import com.howareyoudoing.data.entity.mapper.UserEntityJsonMapper;
import com.howareyoudoing.data.exception.NetworkConnectionException;
import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.RequestBody;

import java.net.MalformedURLException;
import java.util.List;

import io.reactivex.Observable;

/**
 * {@link RestApi} implementation for retrieving data from the network.
 */
public class RestApiImpl implements RestApi {

    private final Context context;
    private final UserEntityJsonMapper userEntityJsonMapper;

    /**
     * Constructor of the class
     *
     * @param context {@link android.content.Context}.
     * @param userEntityJsonMapper {@link UserEntityJsonMapper}.
     */
    public RestApiImpl(Context context, UserEntityJsonMapper userEntityJsonMapper) {
        if (context == null || userEntityJsonMapper == null) {
            throw new IllegalArgumentException("The constructor parameters cannot be null!!!");
        }
        this.context = context.getApplicationContext();
        this.userEntityJsonMapper = userEntityJsonMapper;
    }

    @Override
    public Observable<List<SingleUser>> userEntityList() {
        return Observable.create(emitter -> {
            if (isThereInternetConnection()) {
                try {
                    String responseUserEntities = getUserEntitiesFromApi();
                    if (responseUserEntities != null) {
                        emitter.onNext(userEntityJsonMapper.transformUserEntityCollection(responseUserEntities));
                        emitter.onComplete();
                    } else {
                        emitter.onError(new NetworkConnectionException());
                    }
                } catch (Exception e) {
                    emitter.onError(new NetworkConnectionException(e.getCause()));
                }
            } else {
                emitter.onError(new NetworkConnectionException());
            }
        });
    }

    @Override
    public Observable<SingleUser> userEntityById(final int userId) {
        return Observable.create(emitter -> {
            if (isThereInternetConnection()) {
                try {
                    String responseUserDetails = getUserDetailsFromApi(userId);
                    if (responseUserDetails != null) {
                        //            emitter.onNext(userEntityJsonMapper.transformUserEntity(responseUserDetails));
                        emitter.onComplete();
                    } else {
                        emitter.onError(new NetworkConnectionException());
                    }
                } catch (Exception e) {
                    emitter.onError(new NetworkConnectionException(e.getCause()));
                }
            } else {
                emitter.onError(new NetworkConnectionException());
            }
        });
    }

    private String getUserEntitiesFromApi() throws MalformedURLException {
        String s = "{ \"token\": \"fdca03ce3cf55a3bc5612f91f69176e5632826118694a53ecf4e1622cfa5c7013b52a195faafe0bfe91bec406ed99735\", \"request\": { \"interface\": \"ServiceInterface\", \"method\": \"getAllUsers\", \"parameters\": { } } }";
        MediaType JSON = MediaType.parse("application/json; charset=utf-8");
        RequestBody body = RequestBody.create(JSON, s);
        return ApiConnection.createPOST(API_BASE_URL, body).requestSyncCall();
    }

    private String getUserDetailsFromApi(int userId) throws MalformedURLException {
        String apiUrl = API_URL_GET_USER_DETAILS + userId + ".json";
        return ApiConnection.createGET(apiUrl).requestSyncCall();
    }

    /**
     * Checks if the device has any active internet connection.
     *
     * @return true device with internet connection, otherwise false.
     */
    private boolean isThereInternetConnection() {
        boolean isConnected;

        ConnectivityManager connectivityManager = (ConnectivityManager) this.context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
        isConnected = (networkInfo != null && networkInfo.isConnectedOrConnecting());

        return isConnected;
    }
}