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Android binary resources read/write library
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/*
 *  Copyright (C) 2022 github.com/REAndroid
 *
 *  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.reandroid.archive.writer;

import com.reandroid.archive.InputSource;
import com.reandroid.archive.block.LocalFileHeader;
import com.reandroid.archive.io.ZipFileOutput;
import com.reandroid.archive.io.ZipOutput;

import java.io.IOException;
import java.nio.channels.FileChannel;

class FileOutputSource extends OutputSource {
    private EntryBuffer entryBuffer;

    FileOutputSource(InputSource inputSource){
        super(inputSource);
    }
    void makeBuffer(BufferFileInput input, BufferFileOutput output) throws IOException {
        EntryBuffer entryBuffer = this.entryBuffer;
        if(entryBuffer != null){
            return;
        }
        entryBuffer = makeFromEntry();
        if(entryBuffer != null){
            this.entryBuffer = entryBuffer;
            return;
        }
        this.entryBuffer = writeBuffer(input, output);
    }
    private EntryBuffer writeBuffer(BufferFileInput input, ZipOutput output) throws IOException {
        long offset = output.position();
        writeBuffer(output);
        long length = output.position() - offset;
        return new EntryBuffer(input, offset, length);
    }
    EntryBuffer makeFromEntry(){
        return null;
    }
    void writeApk(ZipFileOutput zipFileOutput, ZipAligner zipAligner) throws IOException{
        logLargeFileWrite();
        EntryBuffer entryBuffer = this.entryBuffer;
        FileChannel input = entryBuffer.getZipFileInput().getFileChannel();
        input.position(entryBuffer.getOffset());
        writeLFH(zipFileOutput, zipAligner);
        writeData(input, entryBuffer.getLength(), zipFileOutput);
        writeDD(zipFileOutput);
    }
    private void writeData(FileChannel input, long length, ZipFileOutput apkFileWriter) throws IOException{
        long offset = apkFileWriter.position();
        LocalFileHeader lfh = getLocalFileHeader();
        lfh.setFileOffset(offset);
        apkFileWriter.write(input, length);
    }


}