#!/usr/bin/env bash

CheckCorrection()
{
  rm input.txt
  if [ $2 = "mobile" ]
  then
    echo $1>>input.txt
    if [ $(grep -ci -rv [a-z] input.txt) = 1 ]
    then
     result="correct"
     else
     result="incorrect.please repeat"
    fi
  fi

  if [ $2 = "email" ]
  then
    echo $1>>input.txt
    if [ $(grep -ci -rv '/\A[^@]+@([^@\.]+\.)+[^@\.]+\z/' input.txt) = 1 ]
    then
     result="correct"
     else
     result="incorrect.please repeat"
    fi
fi
}

echo "Введите $4 :"
read value
CheckCorrection $value $2
while [ "$result" != "correct" ]
do
echo $result
read value
CheckCorrection $value $2
done
echo "Success"