.bashrc

###############
## ALIASES ####
###############

source ~/docs/shared.sh

function vol() {
  USAGE="usage: vol [-h | --help | NUMBER_FROM_0_TO_100 | -DECREMENT | +INCREMENT]"

  # if the argument isn't one of the expected values, display usage instructions
  if [ "$1" == "-h" ] || [ "$1" == "--help" ] || ! [[ "$1" =~ ^$|^[+-]?[0-9]+$ ]]; then
    echo "$USAGE"
    exit 1
  fi

  # retrieve old volume
  OLD_VOLUME="$(osascript -e "output volume of (get volume settings)")"

  if [ -z "$1" ]; then
    echo "$OLD_VOLUME"
  else
    # default case: just set volume to specified value
    NEW_VOLUME="$1"

    # alternatively: decrement or increment?
    if [[ "$1" == -* ]] || [[ "$1" == +* ]]; then
      NEW_VOLUME=$(($OLD_VOLUME + $1))
    fi

    # clamp to [0, 100]
    if [ "$NEW_VOLUME" -lt 0 ]; then
      NEW_VOLUME=0
    fi
    if [ "$NEW_VOLUME" -gt 100 ]; then
      NEW_VOLUME=100
    fi

    # give feedback
    MUTED=""
    if [ "$NEW_VOLUME" -eq 0 ]; then
      MUTED="(muted)"
    fi
    echo "$OLD_VOLUME -> $NEW_VOLUME $MUTED"

    # set
    osascript -e "set volume output volume $NEW_VOLUME"
  fi
}
. "$HOME/.cargo/env"