go_workshop/chapter_03/exercise_3.01/main.go

package main

import (
  "fmt"
  "unicode"
)

func passwordChecker(pw string) bool {

  pwR := []rune(pw)

  if len(pwR) < 8 || len(pwR) > 15 {
    return false
  }

  hasUpper := false
  hasLower := false
  hasNumber := false
  hasSymbol := false

  for _, v := range pwR {

    if unicode.IsUpper(v) {
      hasUpper = true
    }
    if unicode.IsLower(v) {
      hasLower = true
    }
    if unicode.IsNumber(v) {
      hasNumber = true
    }
    if unicode.IsPunct(v) || unicode.IsSymbol(v) {
      hasSymbol = true
    }

  }

  return hasUpper && hasLower && hasNumber && hasSymbol

}

func main() {

  if passwordChecker("") {
    fmt.Println("Password good")
  } else {
    fmt.Println("Password bad")
  }

  if passwordChecker("This!I5A") {
    fmt.Println("Password good")
  } else {
    fmt.Println("Password bad")
  }

}