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/*
* Copyright (C) 2013 Google Inc.
* Licensed to The Android Open Source Project.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.mail.browse;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import com.android.emailcommon.TempDirectory;
import com.android.emailcommon.internet.MimeMessage;
import com.android.emailcommon.mail.MessagingException;
import com.android.mail.ui.MailAsyncTaskLoader;
import com.android.mail.utils.LogTag;
import com.android.mail.utils.LogUtils;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
/**
* Loader that builds a ConversationMessage from an EML file Uri.
*/
public class EmlMessageLoader extends MailAsyncTaskLoader<ConversationMessage> {
private static final String LOG_TAG = LogTag.getLogTag();
private Uri mEmlFileUri;
public EmlMessageLoader(Context context, Uri emlFileUri) {
super(context);
mEmlFileUri = emlFileUri;
}
@Override
public ConversationMessage loadInBackground() {
final Context context = getContext();
TempDirectory.setTempDirectory(context);
final ContentResolver resolver = context.getContentResolver();
final InputStream stream;
try {
stream = resolver.openInputStream(mEmlFileUri);
} catch (FileNotFoundException e) {
LogUtils.e(LOG_TAG, e, "Could not find eml file at uri: %s", mEmlFileUri);
return null;
}
final MimeMessage mimeMessage;
ConversationMessage convMessage;
try {
mimeMessage = new MimeMessage(stream);
convMessage = new ConversationMessage(context, mimeMessage, mEmlFileUri);
} catch (IOException e) {
LogUtils.e(LOG_TAG, e, "Could not read eml file");
return null;
} catch (MessagingException e) {
LogUtils.e(LOG_TAG, e, "Error in parsing eml file");
return null;
} finally {
try {
stream.close();
} catch (IOException e) {
convMessage = null;
}
// delete temp files created during parsing
final File[] cacheFiles = TempDirectory.getTempDirectory().listFiles();
for (final File file : cacheFiles) {
if (file.getName().startsWith("body")) {
final boolean deleted = file.delete();
if (!deleted) {
LogUtils.d(LOG_TAG, "Failed to delete temp file" + file.getName());
}
}
}
}
return convMessage;
}
/**
* Helper function to take care of releasing resources associated
* with an actively loaded data set.
*/
@Override
protected void onDiscardResult(ConversationMessage message) {
// if this eml message had attachments, start a service to clean up the cache files
if (message.attachmentListUri != null) {
final Intent intent = new Intent(Intent.ACTION_DELETE);
intent.setClass(getContext(), EmlTempFileDeletionService.class);
intent.setData(message.attachmentListUri);
getContext().startService(intent);
}
}
}
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