1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.messaging.datamodel;
18
19import android.content.Context;
20import android.net.Uri;
21
22import com.android.messaging.Factory;
23import com.android.messaging.util.LogUtil;
24import com.google.common.annotations.VisibleForTesting;
25
26import java.io.File;
27
28/**
29 * A very simple content provider that can serve mms files from our cache directory.
30 */
31public class MmsFileProvider extends FileProvider {
32    private static final String TAG = LogUtil.BUGLE_TAG;
33
34    @VisibleForTesting
35    static final String AUTHORITY = "com.android.messaging.datamodel.MmsFileProvider";
36    private static final String RAW_MMS_DIR = "rawmms";
37
38    /**
39     * Returns a uri that can be used to access a raw mms file.
40     *
41     * @return the URI for an raw mms file
42     */
43    public static Uri buildRawMmsUri() {
44        final Uri uri = FileProvider.buildFileUri(AUTHORITY, null);
45        final File file = getFile(uri.getPath());
46        if (!ensureFileExists(file)) {
47            LogUtil.e(TAG, "Failed to create temp file " + file.getAbsolutePath());
48        }
49        return uri;
50    }
51
52    @Override
53    File getFile(final String path, final String extension) {
54        return getFile(path);
55    }
56
57    public static File getFile(final Uri uri) {
58        return getFile(uri.getPath());
59    }
60
61    private static File getFile(final String path) {
62        final Context context = Factory.get().getApplicationContext();
63        return new File(getDirectory(context), path + ".dat");
64    }
65
66    private static File getDirectory(final Context context) {
67        return new File(context.getCacheDir(), RAW_MMS_DIR);
68    }
69}
70