org.mythtv.service.content.v25.FileListHelperV25.java Source code

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Here is the source code for org.mythtv.service.content.v25.FileListHelperV25.java

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/**
 * This file is part of MythTV Android Frontend
 *
 * MythTV Android Frontend 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.
 *
 * MythTV Android Frontend 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 MythTV Android Frontend.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This software can be found at <https://github.com/MythTV-Clients/MythTV-Android-Frontend/>
 */
/**
 * 
 */
package org.mythtv.service.content.v25;

import java.util.ArrayList;
import java.util.List;

import org.mythtv.client.ui.preferences.LocationProfile;
import org.mythtv.db.AbstractBaseHelper;
import org.mythtv.service.util.NetworkHelper;
import org.mythtv.services.api.ApiVersion;
import org.mythtv.services.api.ETagInfo;
import org.mythtv.services.api.connect.MythAccessFactory;
import org.mythtv.services.api.v025.MythServicesTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;

import android.content.Context;
import android.util.Log;

/**
 * @author Daniel Frey
 *
 */
public class FileListHelperV25 extends AbstractBaseHelper {

    private static final String TAG = FileListHelperV25.class.getSimpleName();

    private static final ApiVersion mApiVersion = ApiVersion.v025;

    private static MythServicesTemplate mMythServicesTemplate;

    private static FileListHelperV25 singleton;

    /**
     * Returns the one and only FileListHelperV25. init() must be called before 
     * any 
     * @return
     */
    public static FileListHelperV25 getInstance() {
        if (null == singleton) {

            synchronized (FileListHelperV25.class) {

                if (null == singleton) {
                    singleton = new FileListHelperV25();
                }

            }

        }

        return singleton;
    }

    /**
     * Constructor. No one but getInstance() can do this.
     */
    private FileListHelperV25() {
    }

    public List<String> process(final Context context, final LocationProfile locationProfile,
            String storageGroupName) {
        Log.v(TAG, "process : enter");

        if (!NetworkHelper.getInstance().isMasterBackendConnected(context, locationProfile)) {
            Log.w(TAG, "process : Master Backend '" + locationProfile.getHostname() + "' is unreachable");

            return null;
        }

        mMythServicesTemplate = (MythServicesTemplate) MythAccessFactory.getServiceTemplateApiByVersion(mApiVersion,
                locationProfile.getUrl());
        if (null == mMythServicesTemplate) {
            Log.w(TAG, "process : Master Backend '" + locationProfile.getHostname() + "' is unreachable");

            return null;
        }

        List<String> files = null;

        try {

            files = downloadFiles(storageGroupName);

        } catch (Exception e) {
            Log.e(TAG, "process : error", e);

            files = null;
        }

        Log.v(TAG, "process : exit");
        return files;
    }

    // internal helpers

    private List<String> downloadFiles(final String storageGroupName) {
        Log.v(TAG, "downloadFiles : enter");

        List<String> files = null;

        ResponseEntity<org.mythtv.services.api.ArrayOfString> responseEntity = mMythServicesTemplate
                .contentOperations().getFileList(storageGroupName, ETagInfo.createEmptyETag());

        if (responseEntity.getStatusCode().equals(HttpStatus.OK)) {

            org.mythtv.services.api.ArrayOfString fileList = responseEntity.getBody();

            if (null != fileList) {

                if (null != fileList.getValue() && fileList.getValue().length > 0) {

                    files = load(fileList.getValue());
                }

            }

        }

        Log.v(TAG, "downloadFiles : exit");
        return files;
    }

    private List<String> load(String[] versionFiles) {
        Log.v(TAG, "load : enter");

        List<String> files = new ArrayList<String>();

        if (null != versionFiles && versionFiles.length > 0) {

            for (String versionFile : versionFiles) {

                files.add(versionFile);

            }

        }

        Log.v(TAG, "load : exit");
        return files;
    }

}