bashcard

#!/usr/bin/env bash

set -e 

DECK="$1"

HEADER=$'\033[1;30;47m'
BLUEFG=$'\033[0;34m'
REDFG=$'\033[0;31m'
GREENFG=$'\033[0;32m'
YELLOWFG=$'\033[0;33m'
MAGENTAFG=$'\033[0;35m'
CYANFG=$'\033[0;36m'
FGRESET=$'\033[0m'
POINTS=0
TOTAL=0

usage() {
	printf "To start, use script on a deck with tab-separated entries.\n";
	printf "    Usage: %bbashcard %b<deck-name>%b\n" "$GREENFG" "$YELLOWFG" "$FGRESET";
	printf "To exit, press CTRL-c to exit.\n";
	printf "See %bsample.deck%b for example.\n" "$REDFG" "$FGRESET";
	exit
}

main(){
	IFS=$'\t'
	read -ra CARD <<< "$(shuf -n 1 "$DECK")"
	printf "\n";
	printf "%b BASHCARD %b\n" "$HEADER" "$FGRESET";
	printf "%bCategory:%b %s\n" "$BLUEFG" "$FGRESET" "${CARD[0]}"
	printf "%bQuestion:%b %s\n" "$BLUEFG" "$FGRESET" "${CARD[1]}"
	read -rp "$BLUEFG""Answer?$FGRESET " ANSWER
	[[ "$ANSWER" = "${CARD[2]}" ]] && 
		printf "%bCorrect!%b\n" "$GREENFG" "$FGRESET" && POINTS=$(( POINTS + 1 )) || 
		printf "%bIncorrect. The answer is:%b %s\n" "$REDFG" "$FGRESET" "${CARD[2]}"
	TOTAL=$(( TOTAL + 1 ))
}

quit(){
	printf "\n%bGood practice! You answered %s out of %s questions correct.%b\n" "$YELLOWFG" "$POINTS" "$TOTAL" "$FGRESET"
	exit 0
}

[[ -z $1 ]] && usage

[[ -z "$DEBUG" ]] &&
	trap "quit" INT TERM
	while true; do
		main
	done