button

#!/usr/bin/env bash

set -eu

declare -A animations
animations[busy]="b 1000"
animations[warning]="w 400"
animations[error]="e 400"
animations[noise]="n 1000"
animations[shimmer]="s 1000"
animations[rainbow]="r 1000"
animations[power]="p 700"
animations[hdd]="h 700"
animations[startup]="u 700"
animations[shutdown]="d 700"


usage() {
  joinedkeys=$(echo ${!animations[@]} | sed 's/ /|/g')
  echo "$0 [$joinedkeys|help]"
}

# must have a single parameter
if [ $# != 1 ]; then
  usage
  exit 1
fi

# user wants to print help
if [ $1 == "help" ]; then
  usage
  exit 0
fi

# animations array's key list must contain the parameter
if ! [[ " ${!animations[@]} " =~ " $1 " ]]; then
  usage
  exit 1
fi

devices=( $(ls -d /dev/protobutton* 2>/dev/null || true) )

if [ ${#devices[@]} -eq 0 ]; then
  echo "no button found"
  exit 1
fi

button=${devices[0]}

stty -F $button -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke 9600
echo "${animations[$1]}" > "$button"