teatime-white

#!/bin/bash -e

#This script implements the directions for
#brewing white tea as listed on the box

#This function returns after the given seconds
#It displays a simple countdown message
#The message should be a printf style template with
#a %d for the countdown numbers
#usage: countdown 123 'Message %d seconds'
countdown() {
    TIMELEFT=$1
    BLANK=$( printf ' %.0s' $( seq 1 $(( ${#TIMELEFT} + ${#2} )) ) )
    while true ; do
        if [[ "0" -le "$TIMELEFT" ]] ; then
            MIN=$(( $TIMELEFT / 60 ))
            SEC=$(( $TIMELEFT - ($MIN * 60) ))
            printf "\r$BLANK\r$2" $MIN $SEC
            sleep 1s;
            TIMELEFT=$(( $TIMELEFT - 1 ))
        else
            break
        fi
    done
}

#Let water cool for 5 minutes
countdown 300 'Let water cool for %dm %ds'
espeak 'The water is now cool enough'

#Steep tea for 2 minutes
countdown 90 'Tea will be steeped in %dm %ds seconds.'
espeak 'Your tea is steeped'

#Wait 5 minutes for the tea to cool
countdown 300 'Tea will be ready to drink in %dm %ds seconds.'
espeak 'Your tea is ready to drink'

#Add an empty line so the prompt appears on a new line
echo