wrist-exercise.sh

#!/bin/bash

# This script runs an exercise program with custom intervals and exercises. The
# goal is to make sticking to a recommended program as easy as typing in the
# alias to run the script.

# I expect that this will remove the amount of internal conflict for stopping
# the program early, cheating on the amount of time for each exercise, and just
# generally reduce the amount of internal noise experienced on a daily basis. I
# see this as a decision fatigue reduction technique. People like being told
# what to do (eg. group exercise class) - this is just a way to tell yourself
# what to do and decrease your decision making burden.

# Components:
# - Display current exercise with instruction anchors
# - Audio queues to warn of upcoming switch, when to switch, and what to switch to

main(){
    exercise wrist-flex-left "$WRIST_FLEX_INSTRUCTIONS" 15
    exercise wrist-flex-right "$WRIST_FLEX_INSTRUCTIONS" 15
    exercise wrist-flex-left "$WRIST_FLEX_INSTRUCTIONS" 15
    exercise wrist-flex-right "$WRIST_FLEX_INSTRUCTIONS" 15

    exercise prayer-stretch "$PRAYER_STRETCH_INSTRUCTIONS" 15
    exercise mirror-spider-push-ups "$MIRROR_SPIDER_PUSH_UPS_INSTRUCTIONS" 15
    exercise prayer-stretch "$PRAYER_STRETCH_INSTRUCTIONS" 15

    exercise shake-it-off "$SHAKE_IT_OFF_INSTRUCTIONS" 60

    exercise arm-yourself-left "$ARM_YOURSELF_INSTRUCTIONS" 15
    exercise arm-yourself-right "$ARM_YOURSELF_INSTRUCTIONS" 15

    figlet el-fin
    spd-say "You did it! Great job."
}

display(){
    EXERCISE_TITLE=$1
    EXERCISE_INSTRUCTIONS=$2
    EXERCISE_DURATION=$3

    clear
    figlet -c $EXERCISE_TITLE
    echo "Exercise duration:" "$EXERCISE_DURATION" "seconds"
    echo "$EXERCISE_INSTRUCTIONS"
}

exercise(){
    TITLE=$1
    INSTRUCTIONS=$2
    LENGTH_OF_TIME_SECONDS=$3

    COUNTDOWN_INTERVAL=3
    PRE_COUNTDOWN_INTERVAL=$(echo "$LENGTH_OF_TIME_SECONDS - $COUNTDOWN_INTERVAL" | bc)

    display $TITLE "$INSTRUCTIONS" $LENGTH_OF_TIME_SECONDS
    spd-say $TITLE
    sleep $PRE_COUNTDOWN_INTERVAL
    spd-say "Change incoming"
    sleep $COUNTDOWN_INTERVAL
}

WRIST_FLEX_INSTRUCTIONS=$(cat <<EOF
- arms out in front of body
- palms up
- bend wrist towards floor with other hand
EOF
)

PRAYER_STRETCH_INSTRUCTIONS=$(cat <<EOF
- palms together in prayer
- start at chin
- lower slowly to waist stopping at gentle stretch
EOF
)

MIRROR_SPIDER_PUSH_UPS_INSTRUCTIONS=$(cat <<EOF
- palms together in prayer
- press to steeple
- repeat
EOF
		      )

SHAKE_IT_OFF_INSTRUCTIONS=$(cat <<EOF
- drop arms to sides
- shake like drying hands
EOF
)

ARM_YOURSELF_INSTRUCTIONS=$(cat <<EOF
- arm out in front of body
- palm facing floor
- other arm stretch down-facing palm at wrist as far as comfortable
EOF
)


printred() {
    c_grey="\x1b[38;5;1m"
    nc="\033[0m"
    printf "${c_grey}%s${nc}\n" "$*" >&2
}
die() {
    printred "$@" >&2
    if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
        exit ${1-1}
    else
        return ${1-1}
    fi
}

# If executed as a script, instead of sourced
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
    set -euo pipefail
    main "$@"
else
    echo "${BASH_SOURCE[0]}" sourced >&2
    shopt -s expand_aliases # reset from source-harnessing
fi