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package org.libreoffice.storage.external;
import android.content.Context;
import android.support.v4.provider.DocumentFile;
import android.util.Log;
import org.libreoffice.storage.IFile;
import org.libreoffice.storage.IOUtils;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
/**
* Implementation of IFile for the external file system, for Android 4.4+
*
* Uses the DocumentFile class.
*
* The DocumentFile class obfuscates the path of the files it wraps,
* preventing usage of LOK's documentLoad method. A copy of the DocumentFile's contents
* will be created in the cache when files are opened, allowing use of documentLoad.
*/
public class ExternalFile implements IFile{
private final static String LOGTAG = "ExternalFile";
private ExtsdDocumentsProvider provider;
private DocumentFile docFile;
private File duplicateFile;
private Context context;
public ExternalFile(ExtsdDocumentsProvider provider, DocumentFile docFile, Context context) {
this.provider = provider;
this.context = context;
this.docFile = docFile;
}
@Override
public URI getUri() {
try{
return new URI(docFile.toString());
} catch (URISyntaxException e) {
Log.e(LOGTAG, e.getMessage(), e.getCause());
return null;
}
}
@Override
public String getName() {
return docFile.getName();
}
@Override
public boolean isDirectory() {
return docFile.isDirectory();
}
@Override
public long getSize() {
return docFile.length();
}
@Override
public Date getLastModified() {
return new Date(docFile.lastModified());
}
@Override
public List<IFile> listFiles() {
List<IFile> children = new ArrayList<IFile>();
for (DocumentFile child : docFile.listFiles()) {
children.add(new ExternalFile(provider, child, context));
}
return children;
}
@Override
public List<IFile> listFiles(FileFilter filter) {
File file;
try{
List<IFile> children = new ArrayList<IFile>();
for (DocumentFile child : docFile.listFiles()) {
file = new File(new URI(child.getUri().toString()));
if(filter.accept(file))
children.add(new ExternalFile(provider, child, context));
}
return children;
}catch (Exception e){
e.printStackTrace();
}
/* if something goes wrong */
return listFiles();
}
@Override
public IFile getParent(Context context) {
// this is the root node
if(docFile.getParentFile() == null) return null;
return new ExternalFile(provider, docFile.getParentFile(), this.context);
}
@Override
public File getDocument() {
if(isDirectory()) {
return null;
} else {
duplicateFile = duplicateInCache();
return duplicateFile;
}
}
private File duplicateInCache() {
try{
InputStream istream = context.getContentResolver().
openInputStream(docFile.getUri());
File storageFolder = provider.getCacheDir();
File fileCopy = new File(storageFolder, docFile.getName());
OutputStream ostream = new FileOutputStream(fileCopy);
IOUtils.copy(istream, ostream);
return fileCopy;
} catch (Exception e) {
Log.e(LOGTAG, e.getMessage(), e.getCause());
return null;
}
}
@Override
public void saveDocument(File file) {
try{
OutputStream ostream = context.getContentResolver().
openOutputStream(docFile.getUri());
InputStream istream = new FileInputStream(file);
IOUtils.copy(istream, ostream);
} catch (Exception e) {
Log.e(LOGTAG, e.getMessage(), e.getCause());
}
}
@Override
public boolean equals(Object object) {
if (this == object)
return true;
if (!(object instanceof ExternalFile))
return false;
ExternalFile file = (ExternalFile) object;
return file.getUri().equals(getUri());
}
}
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