dotfiles/bin/print-epoch

#!/usr/bin/env bash

COLUMNS=$(tput cols)

digit() {
	echo -en "\U1FBF$1 "
}

print-time() {
	TIMESTAMP="$1"
	for ((i = 0; i < ${#TIMESTAMP}; i++)); do
		digit "${TIMESTAMP:i:1}"
	done
}

spacing() {
	for ((i = 0; i < $1; i++)); do
		printf "%s" "-"
	done
}

col-len() {
	if [[ -z "$2" ]]; then
		echo "${#1}"
	else
		echo "$2"
	fi
}

awk-color() {
	printf 'BEGIN{
      for (colnum = 0; colnum<columns+1; colnum++) {
      	%s;
        r = 255-(i*255/columns);
        g = (i*510/columns);
        b = (i*255/columns);
        if (g>255) g = 510-g;
        printf "\\033[38;2;%%d;%%d;%%d;49m" , r,g,b
        printf "%%s\\033[0m", substr(s,colnum+1,1);
      }
      printf "\\n";
    }' "$1"
}

color-line() {
	awk -v columns="$(col-len "$1" "$2")" -v s="$1" \
		"$(awk-color 'i = (columns-colnum);')"
}

color-line-rev() {
	awk -v columns="$(col-len "$1" "$2")" -v s="$1" \
		"$(awk-color 'i = colnum;')"
}

color-word() {
	printf "\033[1;9%dm%s\033[0m" "$((RANDOM % 7 + 1))" "$1"
}

epoch=$(date +'%s')
side=$(spacing $(((COLUMNS - (${#epoch} + 6)) / 2)))

printf "\n%s %s %s\n" \
	"$(color-line "$side [")" \
	"$(color-word "$epoch")" \
	"$(color-line-rev "] $side")"