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/*
* Copyright (C) 2015 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.messaging.datamodel;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.database.MatrixCursor.RowBuilder;
import android.net.Uri;
import android.provider.OpenableColumns;
import android.support.v4.util.SimpleArrayMap;
import android.text.TextUtils;
import com.android.messaging.Factory;
import com.android.messaging.util.Assert;
import com.android.messaging.util.LogUtil;
import com.google.common.annotations.VisibleForTesting;
import java.io.File;
import java.util.List;
/**
* A very simple content provider that can serve media files from our cache directory.
*/
public class MediaScratchFileProvider extends FileProvider {
private static final String TAG = LogUtil.BUGLE_TAG;
private static final SimpleArrayMap<Uri, String> sUriToDisplayNameMap =
new SimpleArrayMap<Uri, String>();
@VisibleForTesting
public static final String AUTHORITY =
"com.android.messaging.datamodel.MediaScratchFileProvider";
private static final String MEDIA_SCRATCH_SPACE_DIR = "mediascratchspace";
public static boolean isMediaScratchSpaceUri(final Uri uri) {
if (uri == null) {
return false;
}
final List<String> segments = uri.getPathSegments();
return (TextUtils.equals(uri.getScheme(), ContentResolver.SCHEME_CONTENT) &&
TextUtils.equals(uri.getAuthority(), AUTHORITY) &&
segments.size() == 1 && FileProvider.isValidFileId(segments.get(0)));
}
/**
* Returns a uri that can be used to access a raw mms file.
*
* @return the URI for an raw mms file
*/
public static Uri buildMediaScratchSpaceUri(final String extension) {
final Uri uri = FileProvider.buildFileUri(AUTHORITY, extension);
final File file = getFileWithExtension(uri.getPath(), extension);
if (!ensureFileExists(file)) {
LogUtil.e(TAG, "Failed to create temp file " + file.getAbsolutePath());
}
return uri;
}
public static File getFileFromUri(final Uri uri) {
Assert.equals(AUTHORITY, uri.getAuthority());
return getFileWithExtension(uri.getPath(), getExtensionFromUri(uri));
}
public static Uri.Builder getUriBuilder() {
return (new Uri.Builder()).authority(AUTHORITY).scheme(ContentResolver.SCHEME_CONTENT);
}
@Override
File getFile(final String path, final String extension) {
return getFileWithExtension(path, extension);
}
private static File getFileWithExtension(final String path, final String extension) {
final Context context = Factory.get().getApplicationContext();
return new File(getDirectory(context),
TextUtils.isEmpty(extension) ? path : path + "." + extension);
}
private static File getDirectory(final Context context) {
return new File(context.getCacheDir(), MEDIA_SCRATCH_SPACE_DIR);
}
@Override
public Cursor query(final Uri uri, final String[] projection, final String selection,
final String[] selectionArgs, final String sortOrder) {
if (projection != null && projection.length > 0 &&
TextUtils.equals(projection[0], OpenableColumns.DISPLAY_NAME) &&
isMediaScratchSpaceUri(uri)) {
// Retrieve the display name associated with a temp file. This is used by the Contacts
// ImportVCardActivity to retrieve the name of the contact(s) being imported.
String displayName;
synchronized (sUriToDisplayNameMap) {
displayName = sUriToDisplayNameMap.get(uri);
}
if (!TextUtils.isEmpty(displayName)) {
MatrixCursor cursor =
new MatrixCursor(new String[] { OpenableColumns.DISPLAY_NAME });
RowBuilder row = cursor.newRow();
row.add(displayName);
return cursor;
}
}
return null;
}
public static void addUriToDisplayNameEntry(final Uri scratchFileUri,
final String displayName) {
if (TextUtils.isEmpty(displayName)) {
return;
}
synchronized (sUriToDisplayNameMap) {
sUriToDisplayNameMap.put(scratchFileUri, displayName);
}
}
}
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