1 /*
2  * Copyright (C) 2016 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.documentsui.services;
18 
19 import static com.android.documentsui.base.Shared.DEBUG;
20 import static com.android.documentsui.services.FileOperationService.OPERATION_DELETE;
21 
22 import android.app.Notification;
23 import android.app.Notification.Builder;
24 import android.content.ContentResolver;
25 import android.content.Context;
26 import android.net.Uri;
27 import android.util.Log;
28 
29 import com.android.documentsui.Metrics;
30 import com.android.documentsui.R;
31 import com.android.documentsui.base.DocumentInfo;
32 import com.android.documentsui.base.DocumentStack;
33 import com.android.documentsui.base.Features;
34 import com.android.documentsui.clipping.UrisSupplier;
35 
36 import java.io.FileNotFoundException;
37 
38 import javax.annotation.Nullable;
39 
40 final class DeleteJob extends ResolvedResourcesJob {
41 
42     private static final String TAG = "DeleteJob";
43 
44     private final Uri mParentUri;
45 
46     private volatile int mDocsProcessed = 0;
47     /**
48      * Moves files to a destination identified by {@code destination}.
49      * Performs most work by delegating to CopyJob, then deleting
50      * a file after it has been copied.
51      *
52      * @see @link {@link Job} constructor for most param descriptions.
53      */
DeleteJob(Context service, Listener listener, String id, DocumentStack stack, UrisSupplier srcs, @Nullable Uri srcParent, Features features)54     DeleteJob(Context service, Listener listener, String id, DocumentStack stack,
55             UrisSupplier srcs, @Nullable Uri srcParent, Features features) {
56         super(service, listener, id, OPERATION_DELETE, stack, srcs, features);
57         mParentUri = srcParent;
58     }
59 
60     @Override
createProgressBuilder()61     Builder createProgressBuilder() {
62         return super.createProgressBuilder(
63                 service.getString(R.string.delete_notification_title),
64                 R.drawable.ic_menu_delete,
65                 service.getString(android.R.string.cancel),
66                 R.drawable.ic_cab_cancel);
67     }
68 
69     @Override
getSetupNotification()70     public Notification getSetupNotification() {
71         return getSetupNotification(service.getString(R.string.delete_preparing));
72     }
73 
74     @Override
getProgressNotification()75     public Notification getProgressNotification() {
76         mProgressBuilder.setProgress(mResourceUris.getItemCount(), mDocsProcessed, false);
77         String format = service.getString(R.string.delete_progress);
78         mProgressBuilder.setSubText(
79                 String.format(format, mDocsProcessed, mResourceUris.getItemCount()));
80 
81         mProgressBuilder.setContentText(null);
82 
83         return mProgressBuilder.build();
84     }
85 
86     @Override
getFailureNotification()87     Notification getFailureNotification() {
88         return getFailureNotification(
89                 R.plurals.delete_error_notification_title, R.drawable.ic_menu_delete);
90     }
91 
92     @Override
getWarningNotification()93     Notification getWarningNotification() {
94         throw new UnsupportedOperationException();
95     }
96 
97     @Override
start()98     void start() {
99         ContentResolver resolver = appContext.getContentResolver();
100 
101         DocumentInfo parentDoc;
102         try {
103             parentDoc = mParentUri != null
104                 ? DocumentInfo.fromUri(resolver, mParentUri)
105                 : null;
106         } catch (FileNotFoundException e) {
107           Log.e(TAG, "Failed to resolve parent from Uri: " + mParentUri + ". Cannot continue.", e);
108           failureCount += this.mResourceUris.getItemCount();
109           return;
110         }
111 
112         for (DocumentInfo doc : mResolvedDocs) {
113             if (DEBUG) Log.d(TAG, "Deleting document @ " + doc.derivedUri);
114             try {
115                 deleteDocument(doc, parentDoc);
116             } catch (ResourceException e) {
117                 Metrics.logFileOperationFailure(
118                         appContext, Metrics.SUBFILEOP_DELETE_DOCUMENT, doc.derivedUri);
119                 Log.e(TAG, "Failed to delete document @ " + doc.derivedUri, e);
120                 onFileFailed(doc);
121             }
122 
123             mDocsProcessed++;
124             if (isCanceled()) {
125                 return;
126             }
127         }
128 
129         Metrics.logFileOperation(service, operationType, mResolvedDocs, null);
130     }
131 
132     @Override
toString()133     public String toString() {
134         return new StringBuilder()
135                 .append("DeleteJob")
136                 .append("{")
137                 .append("id=" + id)
138                 .append(", uris=" + mResourceUris)
139                 .append(", docs=" + mResolvedDocs)
140                 .append(", srcParent=" + mParentUri)
141                 .append(", location=" + stack)
142                 .append("}")
143                 .toString();
144     }
145 }
146