com.nadmm.airports.tfr.TfrServiceBase.java Source code

Introduction

Here is the source code for com.nadmm.airports.tfr.TfrServiceBase.java

Source

/*
 * FlightIntel for Pilots
 *
 * Copyright 2012 Nadeem Hasan <nhasan@nadmm.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 */

package com.nadmm.airports.tfr;

import java.io.File;
import java.net.URI;
import java.util.Date;

import org.apache.http.client.HttpClient;

import android.app.IntentService;
import android.content.Intent;
import android.support.v4.content.LocalBroadcastManager;
import android.text.format.DateUtils;

import com.nadmm.airports.utils.NetworkUtils;
import com.nadmm.airports.utils.SystemUtils;
import com.nadmm.airports.utils.UiUtils;

public abstract class TfrServiceBase extends IntentService {

    private static final String SERVICE_NAME = "tfr";

    private final File mDataDir;
    private final HttpClient mHttpClient;
    private final long TFR_CACHE_MAX_AGE = 15 * DateUtils.MINUTE_IN_MILLIS;

    public TfrServiceBase() {
        super(SERVICE_NAME);

        mHttpClient = NetworkUtils.getHttpClient();
        mDataDir = SystemUtils.getExternalDir(SERVICE_NAME);

        // Remove any old files from cache first
        cleanupCache(mDataDir, TFR_CACHE_MAX_AGE);
    }

    protected void cleanupCache(File dir, long maxAge) {
        // Delete all files that are older
        Date now = new Date();
        File[] files = dir.listFiles();
        for (File file : files) {
            long age = now.getTime() - file.lastModified();
            if (age > maxAge) {
                file.delete();
            }
        }
    }

    protected void fetch(URI uri, File tfrFile) {
        try {
            NetworkUtils.doHttpGet(this, mHttpClient, uri, tfrFile, null, null, null);
        } catch (Exception e) {
            UiUtils.showToast(this, "TFR: " + e.getMessage());
        }
    }

    protected File getFile(String name) {
        return new File(mDataDir, name);
    }

    protected Intent makeResultIntent(String action) {
        Intent intent = new Intent();
        intent.setAction(action);
        return intent;
    }

    protected void sendResultIntent(Intent intent) {
        LocalBroadcastManager bm = LocalBroadcastManager.getInstance(this);
        bm.sendBroadcast(intent);
    }

}