random group for Prof. Somnuk subject in Kasetsart University

random.sh

#!/usr/bin/env bash
# shellcheck disable=SC1000

# generate by v3.0.2
# link (https://github.com/Template-generator/script-genrating/tree/v3.0.2)

# set -x #DEBUG - Display commands and their arguments as they are executed.
# set -v #VERBOSE - Display shell input lines as they are read.
# set -n #EVALUATE - Check syntax of the script but don't execute.

# requirement 
# 1. Update folder path
# 2. install figlet and univers font

times=("09:00 - 09:45" "09:45 - 10:30" "10:30 - 11:15" "11:15 - 12:00" "13:00 - 13:45" "13:45 - 14:30" "14:30 - 15:15" "15:15 - 16:00" "16:00 - 16:45")

size=8
exist=()

for ((i=0; i < size; i++)); do
  rand="$(((RANDOM % size) + 1))"
  if ! [[ "${exist[*]}" == *"$rand"* ]]; then

    printf "Group name: "
    read -r ans

    figlet -f /tmp/univers -w 150 "$ans"
    figlet -f /tmp/univers -w 150 "Group: $rand"
    figlet -f /tmp/univers -w 150 "${times[rand-1]}"

    echo "$ans --> group $rand" >>/tmp/result.txt
    exist+=("$rand")
  else
    ((i--))
  fi
done