package util

import java.net.{URLDecoder, URLEncoder}
import org.mozilla.universalchardet.UniversalDetector

object StringUtil {

  def sha1(value: String): String = {
    val md = java.security.MessageDigest.getInstance("SHA-1")
    md.update(value.getBytes)
    md.digest.map(b => "%02x".format(b)).mkString
  }

  def md5(value: String): String = {
    val md = java.security.MessageDigest.getInstance("MD5")
    md.update(value.getBytes)
    md.digest.map(b => "%02x".format(b)).mkString
  }

  def urlEncode(value: String): String = URLEncoder.encode(value, "UTF-8")

  def urlDecode(value: String): String = URLDecoder.decode(value, "UTF-8")

  def splitWords(value: String): Array[String] = value.split("[ \\t　]+")

  def escapeHtml(value: String): String =
    value.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;").replace("\"", "&quot;")

  def convertFromByteArray(content: Array[Byte]): String = new String(content, detectEncoding(content))

  def detectEncoding(content: Array[Byte]): String = {
    val detector = new UniversalDetector(null)
    detector.handleData(content, 0, content.length)
    detector.dataEnd()
    detector.getDetectedCharset match {
      case null => "UTF-8"
      case e    => e
    }
  }
}