package com.grash.utils;

import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.security.SecureRandom;
import java.util.Random;

@Component
public class Utils {
    private final Random RANDOM = new SecureRandom();

    public String generateStringId() {
        StringBuilder returnValue = new StringBuilder(8);
        for (int i = 0; i < 8; i++) {
            String ALPHABET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
            returnValue.append(ALPHABET.charAt(RANDOM.nextInt(ALPHABET.length())));
        }
        return returnValue.toString();
    }

    public String readFile(String filename) {
        StringBuilder contentBuilder = new StringBuilder();
        try {
            BufferedReader in = new BufferedReader(new FileReader(filename));
            String str;
            while ((str = in.readLine()) != null) {
                contentBuilder.append(str);
            }
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return contentBuilder.toString();
    }
}