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package de.danoeh.antennapod.storage;
import java.io.File;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.webkit.URLUtil;
import de.danoeh.antennapod.AppConfig;
import de.danoeh.antennapod.feed.Feed;
import de.danoeh.antennapod.feed.FeedFile;
import de.danoeh.antennapod.feed.FeedImage;
import de.danoeh.antennapod.feed.FeedMedia;
import de.danoeh.antennapod.service.download.DownloadService;
import de.danoeh.antennapod.util.NumberGenerator;
import de.danoeh.antennapod.util.URLChecker;
public class DownloadRequester {
private static final String TAG = "DownloadRequester";
public static String EXTRA_DOWNLOAD_ID = "extra.de.danoeh.antennapod.storage.download_id";
public static String EXTRA_ITEM_ID = "extra.de.danoeh.antennapod.storage.item_id";
public static String ACTION_DOWNLOAD_QUEUED = "action.de.danoeh.antennapod.storage.downloadQueued";
public static String IMAGE_DOWNLOADPATH = "images/";
public static String FEED_DOWNLOADPATH = "cache/";
public static String MEDIA_DOWNLOADPATH = "media/";
private static DownloadRequester downloader;
Map<String, FeedFile> downloads;
private DownloadRequester() {
downloads = new ConcurrentHashMap<String, FeedFile>();
}
public static DownloadRequester getInstance() {
if (downloader == null) {
downloader = new DownloadRequester();
}
return downloader;
}
private void download(Context context, FeedFile item, File dest) {
if (!isDownloadingFile(item)) {
if (dest.exists()) {
if (AppConfig.DEBUG)
Log.d(TAG, "File already exists. Deleting !");
dest.delete();
}
if (AppConfig.DEBUG)
Log.d(TAG,
"Requesting download of url " + item.getDownload_url());
item.setDownload_url(URLChecker.prepareURL(item.getDownload_url()));
item.setFile_url(dest.toString());
downloads.put(item.getDownload_url(), item);
DownloadService.Request request = new DownloadService.Request(
item.getFile_url(), item.getDownload_url());
if (!DownloadService.isRunning) {
Intent launchIntent = new Intent(context, DownloadService.class);
launchIntent.putExtra(DownloadService.EXTRA_REQUEST, request);
context.startService(launchIntent);
} else {
Intent queueIntent = new Intent(
DownloadService.ACTION_ENQUEUE_DOWNLOAD);
queueIntent.putExtra(DownloadService.EXTRA_REQUEST, request);
context.sendBroadcast(queueIntent);
}
context.sendBroadcast(new Intent(ACTION_DOWNLOAD_QUEUED));
} else {
Log.e(TAG, "URL " + item.getDownload_url()
+ " is already being downloaded");
}
}
public void downloadFeed(Context context, Feed feed)
throws DownloadRequestException {
if (feedFileValid(feed)) {
download(context, feed, new File(getFeedfilePath(context),
getFeedfileName(feed)));
}
}
public void downloadImage(Context context, FeedImage image)
throws DownloadRequestException {
if (feedFileValid(image)) {
download(context, image, new File(getImagefilePath(context),
getImagefileName(image)));
}
}
public void downloadMedia(Context context, FeedMedia feedmedia) throws DownloadRequestException {
if (feedFileValid(feedmedia)) {
download(context, feedmedia,
new File(getMediafilePath(context, feedmedia),
getMediafilename(feedmedia)));
}
}
/**
* Throws a DownloadRequestException if the feedfile or the download url of
* the feedfile is null.
*
* @throws DownloadRequestException
*/
private boolean feedFileValid(FeedFile f) throws DownloadRequestException {
if (f == null) {
throw new DownloadRequestException("Feedfile was null");
} else if (f.getDownload_url() == null) {
throw new DownloadRequestException("File has no download URL");
} else {
return true;
}
}
/**
* Cancels a running download.
* */
public void cancelDownload(final Context context, final FeedFile f) {
cancelDownload(context, f.getDownload_url());
}
/**
* Cancels a running download.
* */
public void cancelDownload(final Context context, final String downloadUrl) {
if (AppConfig.DEBUG)
Log.d(TAG, "Cancelling download with url " + downloadUrl);
Intent cancelIntent = new Intent(DownloadService.ACTION_CANCEL_DOWNLOAD);
cancelIntent.putExtra(DownloadService.EXTRA_DOWNLOAD_URL, downloadUrl);
context.sendBroadcast(cancelIntent);
}
/** Cancels all running downloads */
public void cancelAllDownloads(Context context) {
if (AppConfig.DEBUG)
Log.d(TAG, "Cancelling all running downloads");
context.sendBroadcast(new Intent(
DownloadService.ACTION_CANCEL_ALL_DOWNLOADS));
}
/** Returns true if there is at least one Feed in the downloads queue. */
public boolean isDownloadingFeeds() {
for (FeedFile f : downloads.values()) {
if (f.getClass() == Feed.class) {
return true;
}
}
return false;
}
/** Checks if feedfile is in the downloads list */
public boolean isDownloadingFile(FeedFile item) {
if (item.getDownload_url() != null) {
return downloads.containsKey(item.getDownload_url());
}
return false;
}
public FeedFile getDownload(String downloadUrl) {
return downloads.get(downloadUrl);
}
/** Checks if feedfile with the given download url is in the downloads list */
public boolean isDownloadingFile(String downloadUrl) {
return downloads.get(downloadUrl) != null;
}
public boolean hasNoDownloads() {
return downloads.isEmpty();
}
public FeedFile getDownloadAt(int index) {
return downloads.get(index);
}
/** Remove an object from the downloads-list of the requester. */
public void removeDownload(FeedFile f) {
if (downloads.remove(f.getDownload_url()) == null) {
Log.e(TAG,
"Could not remove object with url " + f.getDownload_url());
}
}
/** Get the number of uncompleted Downloads */
public int getNumberOfDownloads() {
return downloads.size();
}
public String getFeedfilePath(Context context)
throws DownloadRequestException {
return getExternalFilesDirOrThrowException(context, FEED_DOWNLOADPATH)
.toString() + "/";
}
public String getFeedfileName(Feed feed) {
return "feed-" + NumberGenerator.generateLong(feed.getDownload_url());
}
public String getImagefilePath(Context context)
throws DownloadRequestException {
return getExternalFilesDirOrThrowException(context, IMAGE_DOWNLOADPATH)
.toString() + "/";
}
public String getImagefileName(FeedImage image) {
return "image-" + NumberGenerator.generateLong(image.getDownload_url());
}
public String getMediafilePath(Context context, FeedMedia media)
throws DownloadRequestException {
File externalStorage = getExternalFilesDirOrThrowException(
context,
MEDIA_DOWNLOADPATH
+ NumberGenerator.generateLong(media.getItem()
.getFeed().getTitle()) + "/");
return externalStorage.toString();
}
private File getExternalFilesDirOrThrowException(Context context,
String type) throws DownloadRequestException {
File result = context.getExternalFilesDir(type);
if (result == null) {
throw new DownloadRequestException(
"Failed to access external storage");
}
return result;
}
public String getMediafilename(FeedMedia media) {
return URLUtil.guessFileName(media.getDownload_url(), null,
media.getMime_type());
}
}
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