/*
 * Copyright 2016 Hippo Seven
 *
 * 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.hippo.ehviewer.gallery;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import com.hippo.lib.glgallery.GalleryProvider;
import com.hippo.unifile.UniFile;

public abstract class GalleryProvider2 extends GalleryProvider {

    // With dot
    public static final String[] SUPPORT_IMAGE_EXTENSIONS = {
            ".jpg", // Joint Photographic Experts Group
            ".jpeg",
            ".png", // Portable Network Graphics
            ".gif", // Graphics Interchange Format
    };

    public int getStartPage() {
        return 0;
    }

    public void putStartPage(int page) {}

    /**
     * @return without extension
     */
    @NonNull
    public abstract String getImageFilename(int index);

    public abstract boolean save(int index, @NonNull UniFile file);

    /**
     * @param filename without extension
     */
    @Nullable
    public abstract UniFile save(int index, @NonNull UniFile dir, @NonNull String filename);
}
