Reallllyyy dumb way of doing secret santa

gistfile1.groovy

public enum P {
        
    PERSON('[email protected]', true),
    OTHER('[email protected]', true),
    EH('[email protected]', true),
    
    private final String email
    private final Boolean satan

    private P(String email, Boolean satan) {
      this.email = email
      this.satan = satan
    }
    
    public String getName() {
      def val = toString();
      return val.substring(0,1).toUpperCase() + val.substring(1).toLowerCase();
    }
}

//Put pairs 
def disallowed = [
  [P.PERSON, P.OTHER] as Set
] as Set

def amount = '£15'

def results

//Meh just loop until it works. Cannot be bothered to solve so we just loop until it works

for(;;) {
  def people = Arrays.asList(P.values());
  def hat = Arrays.asList(P.values());
  Collections.shuffle(people);
  Collections.shuffle(hat);
  hat = new ArrayList(hat)

  results = []

  people.each{ person -> 
    def iter = hat.iterator()
    while( iter.hasNext()) {
      def picked = iter.next();
      def relation = [person, picked] as Set
      if(person != picked && ! disallowed.contains(relation)) { 
        results.add([person, picked])
        iter.remove()
        break
      }
    }
  }
  
  if(results.size() == P.values().size()) {
    break
  }
}

results.each { it -> 
  def type = (it[0].satan) ? 'Satan' : 'Santa'
  def name = it[0].getName()
  def email = it[0].email
  def rec  = it[1].getName()
  def body = """Congratulations *${name}* on joining in this year's Secret ${type}!

You will be buying a present for *${rec}*. You can spend a maximum of ${amount}.

Good luck!
"""
  println it[0]
  def f = new File('/tmp/email-'+it[0])
  def script = """mail -s 'Secret ${type}' '${email}' <<EOF
${body}
EOF"""
  f.write(script)
  "bash ${f}".execute()
  f.delete()
}