/*
 * Copyright (c) 2018.
 * 项目名称：auth-gateway-backend
 * 文件名称：SignUtil.java
 * Date：18-3-23 下午3:34
 * Author：boni
 */

package com.irrigation.icl.utils;

import org.apache.commons.codec.digest.DigestUtils;

import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.Map;

/**
 * 签名方法
 */
public class SignUtil {
    /**
     * 使用apiSecret对params进行签名，自动加入了当前日期
     * @param params
     * @param apiSecret
     * @return
     */
    public static String sign(Map<String, String> params, String apiSecret) {
        String[] sortParams = params.keySet().toArray(new String[]{});
        Arrays.sort(sortParams);
        StringBuilder stringBuilder = new StringBuilder();
        for (String key : sortParams) {
            stringBuilder.append(key).append(params.get(key));
        }
        String signRawData = apiSecret + ":" + getDate() + ":" + stringBuilder.toString();
        String signedValue = DigestUtils.md5Hex(signRawData);
        return signedValue;
    }

    private static String getDate() {
        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        String sDateSuffix = dateFormat.format(date);
        return sDateSuffix;
    }
}