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
17package com.android.documentsui.services;
18
19import static com.android.documentsui.base.Shared.DEBUG;
20import static com.android.documentsui.services.FileOperationService.OPERATION_DELETE;
21
22import android.app.Notification;
23import android.app.Notification.Builder;
24import android.content.ContentResolver;
25import android.content.Context;
26import android.net.Uri;
27import android.util.Log;
28
29import com.android.documentsui.Metrics;
30import com.android.documentsui.R;
31import com.android.documentsui.base.DocumentInfo;
32import com.android.documentsui.base.DocumentStack;
33import com.android.documentsui.base.Features;
34import com.android.documentsui.clipping.UrisSupplier;
35
36import java.io.FileNotFoundException;
37
38import javax.annotation.Nullable;
39
40final 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     */
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
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
70    public Notification getSetupNotification() {
71        return getSetupNotification(service.getString(R.string.delete_preparing));
72    }
73
74    @Override
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
87    Notification getFailureNotification() {
88        return getFailureNotification(
89                R.plurals.delete_error_notification_title, R.drawable.ic_menu_delete);
90    }
91
92    @Override
93    Notification getWarningNotification() {
94        throw new UnsupportedOperationException();
95    }
96
97    @Override
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
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