track

#!/bin/bash

LOGFILE="$HOME/projects/dotfiles/work_track_time"
#disables the error if the directory exists, creates parent directories if needed
mkdir -p $(dirname $LOGFILE)

_format_task () {
	# The assignment asks us to convert the time to HH:MM:SS, but also to make sure it runs correctly if the task exeeceds 24H.
	# I choose to optionally render the time as D:HH:MM:SS if the time exceedes 24H.
	local T=$1
	local label=$2
	local D=$((T/60/60/24))
	local H=$((T/60/60%24))
	local M=$((T/60%60))
	local S=$((T%60))
	printf "Task \"$label\": "
	(( $D > 0 )) && printf '%d:' $D
	# In the example output the time always had a leading 0, this is added with the following line
	(( $H < 10 )) && printf "0"
	printf '%d:' $H
	(( $M < 10 )) && printf "0"
	printf '%d:' $M
	(( $S < 10 )) && printf "0"
	printf '%d\n' $S
}

_get_seconds () {
	date +%s
}

_get_difference () {
	local begin=$1
	local end=$2
	local delta=$(($end - $begin))
	echo $delta
}

_get_time () {
	# formats the string to (D)ays (H)ours (M)inutes and (S)econds
	local T=$1
	local D=$((T/60/60/24))
	local H=$((T/60/60%24))
	local M=$((T/60%60))
	local S=$((T%60))
	(( $D > 0 )) && printf '%d days ' $D
	(( $H > 0 )) && printf '%d hours ' $H
	(( $M > 0 )) && printf '%d minutes ' $M
	(( $D > 0 || $H > 0 || $M > 0 )) && printf 'and '
	printf '%d seconds\n' $S
}

_get_label () {
	# old stuff
	# label=`tail -1 "$LOGFILE" | cut -d " " -f3`
	label_full=`tail -1 "$LOGFILE"`
	label_arr=($label_full)

	echo "${label_arr[@]:2}"
}

erase () {
	truncate -s 0 $LOGFILE
}

log_raw () {
	# logs the raw output of the logfile
	while read p; do
		echo "$p"
	done <$LOGFILE
}

log () {
	# logs the formatted output of the log file
	while read line; do
		command=`echo "$line" | cut -d " " -f1`
		if [[ "$command" = "STOP" ]]; then
		end=`echo "$line" | cut -d " " -f2`
		# TODO: I'm not using _get_label here because the case is different
		label_full=`tail -3 "$LOGFILE" | head -1`
		label_arr=($label_full)

		label="${label_arr[@]:2}"

		echo `_format_task $(_get_difference $begin $end) "$label"`
	else
		begin=`echo "$line" | cut -d " " -f2`
		label=$(_get_label)
		fi
	done <$LOGFILE
}

start () {
	last_command=`tail -1 "$LOGFILE" | cut -d " " -f1`
	if [[ "$last_command" = "START" ]]; then
		label=`tail -1 "$LOGFILE" | cut -d " " -f3`
		echo "You can not start the task $1 because there is already a task $label running."
	elif [[ "$#" -lt 1 ]]; then
		echo "You need to provide a name for the task as an additional argument, start \"name\""
	elif [[ "$#" -gt 1 ]]; then
		echo "Too many arguments, please only provide one argument, which is the name of the task you want to track."
	else 
		LABEL=$1
		START=$(_get_seconds)
		echo "START $START $LABEL" >> "$LOGFILE"

		echo "starting the new task $LABEL"
	fi
}

stop () {
	last_command=`tail -1 "$LOGFILE" | cut -d " " -f1`
	if [[ "$last_command" = "START" ]]; then
		label=$(_get_label)

		STOP=$(_get_seconds)
		echo "STOP $STOP $label" >> "$LOGFILE"
		echo "What did I do: " >> "$LOGFILE"
		echo "-------------------" >> "$LOGFILE"
		vim $LOGFILE
	else
		echo "You can't stop because there is no task running, start a task with ./track start \"task_name\""
	fi
	if [[ "$#" -gt 0 ]]; then
		echo "You wrote $1 as an additional argument, but there is no need to provide more arguments for the stop method. stop will stop the current task if there is one."
	fi
}

status () {
	last_command=`tail -1 "$LOGFILE" | cut -d " " -f1`
	if [[ "$last_command" = "START" ]]; then
		label=$(_get_label)
		begin=`tail -1 "$LOGFILE" | cut -d " " -f2`
		echo "You are currently tracking the task \"$label\", it has been going on for $(_get_difference $begin $(_get_seconds)) seconds"
	else
	end=`tail -1 "$LOGFILE" | cut -d " " -f2`
	begin=`tail -2 "$LOGFILE" | head -1 | cut -d " " -f2`

	# TODO: I'm not using _get_label here because the case is different
	label_full=`tail -3 "$LOGFILE" | head -1`

	if [[ -n "$label_full" ]]; then
		label_arr=($label_full)
		label="${label_arr[@]:2}"

	# delta=`$(get_difference $begin $end)`
	# echo $end - $begin = $(get_difference $begin $end) $label
	echo "the task called \"$label\" took $(_get_time $(_get_difference $begin $end)), there is no task currently running"
else
	echo "Cant find any label, probably your timer history is empty"
	fi
	fi
}

"$@" #this lets you call the functions from the terminal