package ru.redguy.tftpserver.datasource;

import java.io.*;
import java.util.HashMap;

public class VirtualFileSystem implements IDataSource {

    private HashMap<String, File> fileHashMap = new HashMap<>();

    public VirtualFileSystem() {

    }

    public void addFile(String name, File file) {
        fileHashMap.put(name, file);
    }

    @Override
    public boolean isFileExists(String file) {
        return fileHashMap.containsKey(file);
    }

    @Override
    public boolean isFile(String file) {
        return fileHashMap.containsKey(file);
    }

    @Override
    public boolean isCanRead(String file) {
        return fileHashMap.containsKey(file);
    }

    @Override
    public OutputStream getOutputStream(String file) {
        try {
            return new FileOutputStream(fileHashMap.get(file));
        } catch (FileNotFoundException e) {
            return null;
        }
    }

    @Override
    public InputStream getInputStream(String file) {
        try {
            return new FileInputStream(fileHashMap.get(file));
        } catch (FileNotFoundException e) {
            return null;
        }
    }

    @Override
    public void delete(String file) {
        fileHashMap.remove(file);
    }
}