es.upm.dit.gsi.noticiastvi.gtv.item.SetRemoveFavoriteThread.java Source code

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Here is the source code for es.upm.dit.gsi.noticiastvi.gtv.item.SetRemoveFavoriteThread.java

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//   Copyright 2011 UPM-GSI: Group of Intelligent Systems -
//   - Universidad Politcnica de Madrid (UPM)
//
//   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 es.upm.dit.gsi.noticiastvi.gtv.item;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.os.Handler;
import android.os.Message;
import android.util.Log;
import es.upm.dit.gsi.noticiastvi.gtv.util.Constant;

/**
 * set or removes a item from favorites
 * 
 * @author Antonio Prada <toniprada@gmail.com>
 * 
 */
public class SetRemoveFavoriteThread extends Thread {

    public static final String SET = "setPreference";
    public static final String REMOVE = "removePreference";

    private static final boolean TEST = Constant.TEST;
    public static final int RESULT_OK = 30;
    public static final int RESULT_ERROR = 31;

    private Handler handler;
    private int userId;
    private int id;
    private String action = SET;

    public SetRemoveFavoriteThread(Handler handler, int id, int userId, String action) {
        this.handler = handler;
        this.userId = userId;
        this.id = id;
        this.action = action;
    }

    @Override
    public void run() {
        if (doFavorite()) {
            handler.sendMessage(Message.obtain(handler, RESULT_OK));
        } else {
            handler.sendMessage(Message.obtain(handler, RESULT_ERROR));
        }
    }

    private boolean doFavorite() {
        if (!TEST) {
            DefaultHttpClient client = new DefaultHttpClient();
            HttpGet getRequest = new HttpGet(Constant.SERVER_URL + "?action=" + action + "&identifier=" + userId
                    + "&content=" + id + "&preference=5");
            try {
                HttpResponse getResponse = client.execute(getRequest);
                InputStream source = getResponse.getEntity().getContent();
                if (source != null) {
                    String res = convertStreamToString(source);
                    return res.contains("ok");
                } else {
                    return false;
                }
            } catch (IOException e) {
                getRequest.abort();
                Log.w(getClass().getSimpleName(), "Error", e);
                return false;
            }
        } else {
            Log.i("favorite", "TEST_MODE");
            return true;
        }

    }

    public String convertStreamToString(InputStream is) throws IOException {
        /*
         * To convert the InputStream to String we use the
         * Reader.read(char[] buffer) method. We iterate until the
         * Reader return -1 which means there's no more data to
         * read. We use the StringWriter class to produce the string.
         */
        if (is != null) {
            Writer writer = new StringWriter();

            char[] buffer = new char[1024];
            try {
                Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                int n;
                while ((n = reader.read(buffer)) != -1) {
                    writer.write(buffer, 0, n);
                }
            } finally {
                is.close();
            }
            return writer.toString();
        } else {
            return "";
        }
    }

}