// Loosely based on the workaround posted here:
// http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4993360
// XXX why isn't this in Apache Commons?
public static boolean isFileWritable(File file) {
boolean isWritable = false;
if (file != null) {
boolean fileAlreadyExists = file.isFile(); // i.e. exists and is a File
if (fileAlreadyExists || !file.exists()) {
try {
// true: open for append: make sure the open
// doesn't clobber the file
new FileOutputStream(file, true).close();
isWritable = true;
if (!fileAlreadyExists) { // a new file has been "touch"ed; try to remove it
try {
if (!file.delete()) {
LOGGER.warn("Can't delete temporary test file: {}", file.getAbsolutePath());
}
} catch (SecurityException se) {
LOGGER.error("Error deleting temporary test file: " + file.getAbsolutePath(), se);
}
}
} catch (IOException | SecurityException ioe) {
}
}
}
return isWritable;
}
public static boolean isFolderRelevant(
File f, PmsConfiguration configuration, Set<String> ignoreFiles) {
if (f.isDirectory() && configuration.isHideEmptyFolders()) {
File[] children = f.listFiles();
/**
* listFiles() returns null if "this abstract pathname does not denote a directory, or if an
* I/O error occurs". in this case (since we've already confirmed that it's a directory), this
* seems to mean the directory is non-readable
* http://www.ps3mediaserver.org/forum/viewtopic.php?f=6&t=15135
* http://stackoverflow.com/questions/3228147/retrieving-the-underlying-error-when-file-listfiles-return-null
*/
if (children == null) {
LOGGER.warn("Can't list files in non-readable directory: {}", f.getAbsolutePath());
} else {
for (File child : children) {
if (ignoreFiles.contains(child.getAbsolutePath())) {
continue;
}
if (child.isFile()) {
if (FormatFactory.getAssociatedFormat(child.getName()) != null
|| isFileRelevant(child, configuration)) {
return true;
}
} else {
if (isFolderRelevant(child, configuration, ignoreFiles)) {
return true;
}
}
}
}
}
return false;
}
// based on the workaround posted here:
// http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4993360
// XXX why isn't this in Apache Commons?
public static boolean isFileReadable(File file) {
boolean isReadable = false;
if ((file != null) && file.isFile()) {
try {
new FileInputStream(file).close();
isReadable = true;
} catch (IOException ioe) {
}
}
return isReadable;
}
private static synchronized boolean browseFolderForSubtitles(
File subFolder, File file, DLNAMediaInfo media, boolean usecache) {
boolean found = false;
if (!usecache) {
cache = null;
}
if (cache == null) {
cache = new HashMap<>();
}
final Set<String> supported = SubtitleType.getSupportedFileExtensions();
File[] allSubs = cache.get(subFolder);
if (allSubs == null) {
allSubs =
subFolder.listFiles(
new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
String ext = FilenameUtils.getExtension(name).toLowerCase();
if ("sub".equals(ext)) {
// Avoid microdvd/vobsub confusion by ignoring sub+idx pairs here since
// they'll come in unambiguously as vobsub via the idx file anyway
return isFileExists(new File(dir, name), "idx") == null;
}
return supported.contains(ext);
}
});
if (allSubs != null) {
cache.put(subFolder, allSubs);
}
}
String fileName = getFileNameWithoutExtension(file.getName()).toLowerCase();
if (allSubs != null) {
for (File f : allSubs) {
if (f.isFile() && !f.isHidden()) {
String fName = f.getName().toLowerCase();
for (String ext : supported) {
if (fName.length() > ext.length()
&& fName.startsWith(fileName)
&& endsWithIgnoreCase(fName, "." + ext)) {
int a = fileName.length();
int b = fName.length() - ext.length() - 1;
String code = "";
if (a <= b) { // handling case with several dots: <video>..<extension>
code = fName.substring(a, b);
}
if (code.startsWith(".")) {
code = code.substring(1);
}
boolean exists = false;
if (media != null) {
for (DLNAMediaSubtitle sub : media.getSubtitleTracksList()) {
if (f.equals(sub.getExternalFile())) {
exists = true;
} else if (equalsIgnoreCase(ext, "idx")
&& sub.getType() == SubtitleType.MICRODVD) { // sub+idx => VOBSUB
sub.setType(SubtitleType.VOBSUB);
exists = true;
} else if (equalsIgnoreCase(ext, "sub")
&& sub.getType() == SubtitleType.VOBSUB) { // VOBSUB
try {
sub.setExternalFile(f);
} catch (FileNotFoundException ex) {
LOGGER.warn("Exception during external subtitles scan.", ex);
}
exists = true;
}
}
}
if (!exists) {
DLNAMediaSubtitle sub = new DLNAMediaSubtitle();
sub.setId(
100
+ (media == null
? 0
: media.getSubtitleTracksList().size())); // fake id, not used
if (code.length() == 0 || !Iso639.getCodeList().contains(code)) {
sub.setLang(DLNAMediaSubtitle.UND);
sub.setType(SubtitleType.valueOfFileExtension(ext));
if (code.length() > 0) {
sub.setFlavor(code);
if (sub.getFlavor().contains("-")) {
String flavorLang =
sub.getFlavor().substring(0, sub.getFlavor().indexOf('-'));
String flavorTitle =
sub.getFlavor().substring(sub.getFlavor().indexOf('-') + 1);
if (Iso639.getCodeList().contains(flavorLang)) {
sub.setLang(flavorLang);
sub.setFlavor(flavorTitle);
}
}
}
} else {
sub.setLang(code);
sub.setType(SubtitleType.valueOfFileExtension(ext));
}
try {
sub.setExternalFile(f);
} catch (FileNotFoundException ex) {
LOGGER.warn("Exception during external subtitles scan.", ex);
}
found = true;
if (media != null) {
media.getSubtitleTracksList().add(sub);
}
}
}
}
}
}
}
return found;
}