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      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 
     17 package com.android.messaging.datamodel;
     18 
     19 import android.content.Context;
     20 import android.net.Uri;
     21 
     22 import com.android.messaging.Factory;
     23 import com.android.messaging.util.LogUtil;
     24 import com.google.common.annotations.VisibleForTesting;
     25 
     26 import java.io.File;
     27 
     28 /**
     29  * A very simple content provider that can serve mms files from our cache directory.
     30  */
     31 public 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