1/*
2 * Copyright (C) 2013 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.camera.data;
18
19import android.content.Context;
20import android.view.View;
21
22import com.android.camera.Storage;
23import com.android.camera.debug.Log;
24import com.android.camera.util.Size;
25import com.bumptech.glide.Glide;
26import com.bumptech.glide.load.Key;
27import com.bumptech.glide.signature.MediaStoreSignature;
28import com.google.common.base.Optional;
29
30import java.io.File;
31import java.text.DateFormat;
32
33import javax.annotation.Nonnull;
34
35/**
36 * A base class for all the local media files. The bitmap is loaded in
37 * background thread. Subclasses should implement their own background loading
38 * thread by sub-classing BitmapLoadTask and overriding doInBackground() to
39 * return a bitmap.
40 */
41public abstract class FilmstripItemBase<T extends FilmstripItemData> implements FilmstripItem {
42    /** The minimum id to use to query for all media at a given media store uri */
43    public static final int QUERY_ALL_MEDIA_ID = -1;
44
45    protected final Context mContext;
46    protected final GlideFilmstripManager mGlideManager;
47    protected final T mData;
48    protected final Metadata mMetaData;
49    protected final FilmstripItemAttributes mAttributes;
50    protected final DateFormat mDateFormatter = DateFormat.getDateTimeInstance();
51
52    protected Size mSuggestedSize;
53
54    public FilmstripItemBase(Context context, GlideFilmstripManager glideManager, T data,
55          FilmstripItemAttributes attributes) {
56        mContext = context;
57        mGlideManager = glideManager;
58        mData = data;
59        mAttributes = attributes;
60
61        mMetaData = new Metadata();
62
63        mSuggestedSize = GlideFilmstripManager.TINY_THUMB_SIZE;
64    }
65
66    @Override
67    public FilmstripItemData getData() {
68        return mData;
69    }
70
71    @Override
72    public boolean delete() {
73        File fileToDelete = new File(mData.getFilePath());
74        boolean deletionSucceeded = fileToDelete.delete();
75        deleteIfEmptyCameraSubDir(fileToDelete.getParentFile());
76        return deletionSucceeded;
77    }
78
79    @Override
80    public void setSuggestedSize(int widthPx, int heightPx) {
81        if (widthPx > 0 && heightPx > 0) {
82            mSuggestedSize = new Size(widthPx, heightPx);
83        } else {
84            Log.w(TAG, "Suggested size was set to a zero area value!");
85        }
86    }
87
88    @Override
89    public void recycle(@Nonnull View view) {
90        Glide.clear(view);
91    }
92
93    @Override
94    public Optional<MediaDetails> getMediaDetails() {
95        MediaDetails mediaDetails = new MediaDetails();
96        mediaDetails.addDetail(MediaDetails.INDEX_TITLE, mData.getTitle());
97        mediaDetails.addDetail(MediaDetails.INDEX_WIDTH, getDimensions().getWidth());
98        mediaDetails.addDetail(MediaDetails.INDEX_HEIGHT, getDimensions().getHeight());
99        mediaDetails.addDetail(MediaDetails.INDEX_PATH, mData.getFilePath());
100        mediaDetails.addDetail(MediaDetails.INDEX_DATETIME,
101              mDateFormatter.format(mData.getLastModifiedDate()));
102        long mSizeInBytes = mData.getSizeInBytes();
103        if (mSizeInBytes > 0) {
104            mediaDetails.addDetail(MediaDetails.INDEX_SIZE, mSizeInBytes);
105        }
106
107        Location location = mData.getLocation();
108        if (location != Location.UNKNOWN) {
109            mediaDetails.addDetail(MediaDetails.INDEX_LOCATION, location.getLocationString());
110        }
111        return Optional.of(mediaDetails);
112    }
113
114    @Override
115    public FilmstripItemAttributes getAttributes() {
116        return mAttributes;
117    }
118
119    @Override
120    public Metadata getMetadata() {
121        return mMetaData;
122    }
123
124    @Override
125    public Size getDimensions() {
126        return mData.getDimensions();
127    }
128
129    @Override
130    public int getOrientation() {
131        return mData.getOrientation();
132    }
133
134    protected final Key generateSignature(FilmstripItemData data) {
135        // Per Glide docs, make default mime type be the empty String
136        String mimeType = (data.getMimeType() == null) ? "" : data.getMimeType();
137        long modTimeSeconds = (data.getLastModifiedDate() == null) ? 0 :
138              data.getLastModifiedDate().getTime() / 1000;
139        return new MediaStoreSignature(mimeType, modTimeSeconds, data.getOrientation());
140    }
141
142    private void deleteIfEmptyCameraSubDir(File directory) {
143        // Make sure 'directory' refers to a valid existing empty directory.
144        if (!directory.exists() || !directory.isDirectory() || directory.list().length != 0) {
145            return;
146        }
147
148        // Check if this is a 'Camera' sub-directory.
149        String cameraPathStr = Storage.DIRECTORY_FILE.getAbsolutePath();
150        String fileParentPathStr = directory.getParentFile().getAbsolutePath();
151        Log.d(TAG, "CameraPathStr: " + cameraPathStr + "  fileParentPathStr: " + fileParentPathStr);
152
153        // Delete the directory if it's an empty sub-directory of the Camera
154        // directory.
155        if (fileParentPathStr.equals(cameraPathStr)) {
156            if(!directory.delete()) {
157                Log.d(TAG, "Failed to delete: " + directory);
158            }
159        }
160    }
161}
162