medlog

#!/bin/bash

#----------------------------------------------------------------------------------
# Project Name      - miscellaneous/medlog
# Started On        - Fri 18 Nov ??:??:?? BST 2016
# Last Change       - Thu  8 Mar 06:40:45 GMT 2018
# Author E-Mail     - terminalforlife@yahoo.com
# Author GitHub     - https://github.com/terminalforlife
#----------------------------------------------------------------------------------
# WARNING: This program (older one, compared to the GUI, medlogip) logs in the
#          opposite direction to medlogip. When I wrote medlogip, I realised it was
#          silly having the latest entries at the bottom. An easy fix in medlog, -
#          so I may include that at some point.
#----------------------------------------------------------------------------------

_VERSION_="2018-03-08"

XERR(){ printf "[L%0.4d] ERROR: %s\n" "$1" "$2" 1>&2; exit 1; }
ERR(){ printf "[L%0.4d] ERROR: %s\n" "$1" "$2" 1>&2; }

USAGE(){
	while read -r; do
		printf "%s\n" "$REPLY"
	done <<-EOF
		            MEDLOG ($_VERSION_)
		            Written by terminalforlife (terminalforlife@yahoo.com)

		            Need help logging when you've taken your daily medication?

		SYNTAX:     medlog [OPTS]

		OPTS:       --help|-h|-?            - Displays this help information.
		            --version|-v            - Output only the version datestamp.
		            --debug|-D              - Enables the built-in bash debugging.
	EOF
}

while [ "$1" ]; do
	case "$1" in
		--help|-h|-\?)
			USAGE; exit 0 ;;
		--version|-v)
			printf "%s\n" "$_VERSION_"
			exit 0 ;;
		--debug|-D)
			DEBUGME="true" ;;
		--quiet|-q)
			BEQUIET="true" ;;
		*)
			XERR "$LINENO" "Incorrect argument(s) specified." ;;
	esac
	shift
done

declare -i DEPCOUNT=0
for DEP in /usr/bin/{xmessage,notify-send} /bin/mkdir; {
	if ! [ -x "$DEP" ]; then
		ERR "$LINENO" "Dependency '$DEP' not met."
		DEPCOUNT+=1
	fi
}

[ $DEPCOUNT -eq 0 ] || exit 1

[ "$DEBUGME" == "true" ] && set -x

MAINDIR="$HOME/.medlog"
LOGFILE="$MAINDIR/medlog.log"
[ -d "$MAINDIR" ] || /bin/mkdir -p "$MAINDIR"
[ -f "$LOGFILE" ] || > "$LOGFILE"
[ -w "$LOGFILE" ] || XERR "$LINENO" "File '${LOGFILE//*\/}' has no write access."

while read -a X; do
	printf -v LAST_LOG "%s\n" "${X[0]}"
done < "$LOGFILE"

printf -v TODAY_DATE "%(%F (%X))T" -1
MSG="Medication taken today, $USER?"
MSG_NO="Take medication, then reload medlog."
if [ "${TODAY_DATE%/*}" == "${LAST_LOG%/*}" ]; then
	/usr/bin/notify-send "Medication already taken today."
else
	if ! /usr/bin/xmessage -buttons yes,no -center "$MSG"; then
		#TODO - Loop a reminder notification every X minutes.
		/usr/bin/notify-send "$MSG_NO"
		exit 1
	else
		printf "%(%F (%X))T\n" -1 >> "$LOGFILE"
	fi
fi

# vim: noexpandtab colorcolumn=84 tabstop=8 noswapfile nobackup