From 216fa22791889774b83977341632c4570dcec35d Mon Sep 17 00:00:00 2001
From: Vasu Nori <vnori@google.com>
Date: Tue, 12 Oct 2010 23:08:13 -0700
Subject: [PATCH] bug:3069735 in Download UI app, handle deletes correctly

gingerbread.
(for more detailed comments, please see the dependent CL
Change-Id: Ib90eb9e647f543312c865d3bbf9a06fb867a648b )

2 changes in this CL.
1. add 2 new columns to downloads table in downloads.db:
    mediaprovider_uri = downloaded file's content_uri in mediaprovider db
    deleted = flag is set to true if a file is to be deleted
2. download UI app shows only those files whose 'deleted' flag is not set

Change-Id: I47c5f72b0a0b354fac3abe3a97752130b8189794
---
 api/current.xml                            | 11 +++++++
 core/java/android/app/DownloadManager.java | 35 +++++++++++++++++++++-
 core/java/android/provider/Downloads.java  | 26 ++++++++++++++++
 3 files changed, 71 insertions(+), 1 deletion(-)

diff --git a/api/current.xml b/api/current.xml
index 3c2662dd8610e..0efc4665cbf18 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -24649,6 +24649,17 @@
  visibility="public"
 >
 </field>
+<field name="COLUMN_MEDIAPROVIDER_URI"
+ type="java.lang.String"
+ transient="false"
+ volatile="false"
+ value="&quot;mediaprovider_uri&quot;"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="COLUMN_MEDIA_TYPE"
  type="java.lang.String"
  transient="false"
diff --git a/core/java/android/app/DownloadManager.java b/core/java/android/app/DownloadManager.java
index 00d8ae3ec7b03..a25aa6f44f105 100644
--- a/core/java/android/app/DownloadManager.java
+++ b/core/java/android/app/DownloadManager.java
@@ -28,7 +28,6 @@ import android.os.Environment;
 import android.os.ParcelFileDescriptor;
 import android.provider.BaseColumns;
 import android.provider.Downloads;
-import android.util.Log;
 import android.util.Pair;
 
 import java.io.File;
@@ -136,6 +135,12 @@ public class DownloadManager {
      */
     public final static String COLUMN_LAST_MODIFIED_TIMESTAMP = "last_modified_timestamp";
 
+    /**
+     * The URI to the corresponding entry in MediaProvider for this downloaded entry. It is
+     * used to delete the entries from MediaProvider database when it is deleted from the
+     * downloaded list.
+     */
+    public static final String COLUMN_MEDIAPROVIDER_URI = "mediaprovider_uri";
 
     /**
      * Value of {@link #COLUMN_STATUS} when the download is waiting to start.
@@ -266,6 +271,7 @@ public class DownloadManager {
     // this array must contain all public columns
     private static final String[] COLUMNS = new String[] {
         COLUMN_ID,
+        COLUMN_MEDIAPROVIDER_URI,
         COLUMN_TITLE,
         COLUMN_DESCRIPTION,
         COLUMN_URI,
@@ -281,6 +287,7 @@ public class DownloadManager {
     // columns to request from DownloadProvider
     private static final String[] UNDERLYING_COLUMNS = new String[] {
         Downloads.Impl._ID,
+        Downloads.Impl.COLUMN_MEDIAPROVIDER_URI,
         Downloads.COLUMN_TITLE,
         Downloads.COLUMN_DESCRIPTION,
         Downloads.COLUMN_URI,
@@ -677,6 +684,9 @@ public class DownloadManager {
                 selectionParts.add(Downloads.Impl.COLUMN_IS_VISIBLE_IN_DOWNLOADS_UI + " != '0'");
             }
 
+            // only return rows which are not marked 'deleted = 1'
+            selectionParts.add(Downloads.Impl.COLUMN_DELETED + " != '1'");
+
             String selection = joinStrings(" AND ", selectionParts);
             String orderDirection = (mOrderDirection == ORDER_ASCENDING ? "ASC" : "DESC");
             String orderBy = mOrderByColumn + " " + orderDirection;
@@ -742,6 +752,26 @@ public class DownloadManager {
         return id;
     }
 
+    /**
+     * Marks the specified download as 'to be deleted'. This is done when a completed download
+     * is to be removed but the row was stored without enough info to delete the corresponding
+     * metadata from Mediaprovider database. Actual cleanup of this row is done in DownloadService.
+     *
+     * @param ids the IDs of the downloads to be marked 'deleted'
+     * @return the number of downloads actually updated
+     * @hide
+     */
+    public int markRowDeleted(long... ids) {
+        if (ids == null || ids.length == 0) {
+            // called with nothing to remove!
+            throw new IllegalArgumentException("input param 'ids' can't be null");
+        }
+        ContentValues values = new ContentValues();
+        values.put(Downloads.Impl.COLUMN_DELETED, 1);
+        return mResolver.update(mBaseUri, values, getWhereClauseForIds(ids),
+                getWhereArgsForIds(ids));
+    }
+
     /**
      * Cancel downloads and remove them from the download manager.  Each download will be stopped if
      * it was running, and it will no longer be accessible through the download manager.  If a file
@@ -950,6 +980,9 @@ public class DownloadManager {
             if (column.equals(COLUMN_MEDIA_TYPE)) {
                 return getUnderlyingString(Downloads.COLUMN_MIME_TYPE);
             }
+            if (column.equals(COLUMN_MEDIAPROVIDER_URI)) {
+                return getUnderlyingString(Downloads.Impl.COLUMN_MEDIAPROVIDER_URI);
+            }
 
             assert column.equals(COLUMN_LOCAL_URI);
             return getLocalUri();
diff --git a/core/java/android/provider/Downloads.java b/core/java/android/provider/Downloads.java
index 8fd0e0a3f712b..72bf6b08d684e 100644
--- a/core/java/android/provider/Downloads.java
+++ b/core/java/android/provider/Downloads.java
@@ -300,6 +300,15 @@ public final class Downloads {
      */
     public static final String COLUMN_DESCRIPTION = "description";
 
+    /**
+     * Set to true if this download is deleted. It is completely removed from the database
+     * when MediaProvider database also deletes the metadata asociated with this downloaded file.
+     * <P>Type: BOOLEAN</P>
+     * <P>Owner can Read</P>
+     * @hide
+     */
+    public static final String COLUMN_DELETED = "deleted";
+
     /*
      * Lists the destinations that an application can specify for a download.
      */
@@ -881,6 +890,23 @@ public final class Downloads {
         public static final String COLUMN_BYPASS_RECOMMENDED_SIZE_LIMIT =
             "bypass_recommended_size_limit";
 
+        /**
+         * Set to true if this download is deleted. It is completely removed from the database
+         * when MediaProvider database also deletes the metadata asociated with this downloaded file.
+         * <P>Type: BOOLEAN</P>
+         * <P>Owner can Read</P>
+         */
+        public static final String COLUMN_DELETED = "deleted";
+
+        /**
+         * The URI to the corresponding entry in MediaProvider for this downloaded entry. It is
+         * used to delete the entries from MediaProvider database when it is deleted from the
+         * downloaded list.
+         * <P>Type: TEXT</P>
+         * <P>Owner can Read</P>
+         */
+        public static final String COLUMN_MEDIAPROVIDER_URI = "mediaprovider_uri";
+
         /*
          * Lists the destinations that an application can specify for a download.
          */