1 files changed, 54 insertions, 0 deletions
diff --git a/src/com/android/providers/downloads/MediaStoreDownloadsHelper.java b/src/com/android/providers/downloads/MediaStoreDownloadsHelper.java
new file mode 100644
index 00000000..c4f347cb
--- /dev/null
+++ b/src/com/android/providers/downloads/MediaStoreDownloadsHelper.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2019 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.providers.downloads;
+
+import android.content.ContentUris;
+import android.net.Uri;
+import android.provider.MediaStore;
+
+public class MediaStoreDownloadsHelper {
+
+    private static final String MEDIASTORE_DOWNLOAD_FILE_PREFIX = "msf:";
+    private static final String MEDIASTORE_DOWNLOAD_DIR_PREFIX = "msd:";
+
+    public static String getDocIdForMediaStoreDownload(long id, boolean isDir) {
+        return (isDir ? MEDIASTORE_DOWNLOAD_DIR_PREFIX : MEDIASTORE_DOWNLOAD_FILE_PREFIX) + id;
+    }
+
+    public static boolean isMediaStoreDownload(String docId) {
+        return docId != null && (docId.startsWith(MEDIASTORE_DOWNLOAD_FILE_PREFIX)
+                || docId.startsWith(MEDIASTORE_DOWNLOAD_DIR_PREFIX));
+    }
+
+    public static long getMediaStoreId(String docId) {
+        return Long.parseLong(getMediaStoreIdString(docId));
+    }
+
+
+    public static String getMediaStoreIdString(String docId) {
+        final int index = docId.indexOf(":");
+        return docId.substring(index + 1);
+    }
+
+    public static boolean isMediaStoreDownloadDir(String docId) {
+        return docId != null && docId.startsWith(MEDIASTORE_DOWNLOAD_DIR_PREFIX);
+    }
+
+    public static Uri getMediaStoreUri(String docId) {
+        return ContentUris.withAppendedId(MediaStore.Downloads.EXTERNAL_CONTENT_URI,
+                getMediaStoreId(docId));
+    }
+}