generate-workingdays-sheet

#!/usr/bin/env bash
#
# Generate working days sheet.

dir=${XDG_VAR_HOME:-$HOME/var}/lib/workingdays

declare -A off=()

date_fmt=%-Y%t%-m%t%-d%t%-j%t%-q%t%-V%t%-u%t

for y in "${@:-$(printf '%(%Y)T')}"; do
    {
        dir=$dir/$y

        printf %d "$y" 1>/dev/null && command -- mkdir -p -- "$dir" ||
            exit

        command -- touch -- "$dir/"{holiday,urlaub{stageanzahl,},sick}.txt

        esunday=$(exec -- date --date="$(exec -- ncal -e "$y")" +%F)

        # berlin:
        #
        # neujahr, internationaler_frauentag, tag_der_{arbeit,deutschen_einheit},
        # [12]._weihnachtstag, karfreitag, ostermontag, christi_himmelfahrt, pfingstmontag,
        # extra holidays and urlaub
        eval "$(
            date --file /dev/stdin +off["%F"]=\"${date_fmt}holiday\" <<-IN
				$y-01-01
				$y-03-08
				$y-05-01
				$y-10-03
				$y-12-25
				$y-12-26
				$esunday - 2 days
				$esunday + 1 day
				$esunday + 39 days
				$esunday + 50 days
			IN

            for f in "$dir/"{holiday,urlaub,sick}.txt; do
                t=${f%.txt}
                t=${t##*/}
                exec -- sed -n 's:^\([^\t]\{4\}\)\t\([^\t]\{2\}\)\t\([^\t]\{2\}\)$:\1-\2-\3:p' "$f" |
                    exec -- date --file /dev/stdin +off["%F"]=\"$date_fmt$t\" &
            done
            wait
        )"

        {
            for m in {01..12}; do
                {
                    declare -a days="({01..$(exec -- date --date="$y-$m-01 + 1 month - 1 day" +%d)})"
                    for d in "${days[@]}"; do
                        if [[ -n ${off["$y-$m-$d"]} ]]; then
                            printf '%s\n' "${off["$y-$m-$d"]}"
                        else
                            exec -- date --date=$y-$m-$d "+${date_fmt}work"
                        fi &
                    done
                    wait
                } &
            done
            wait
        } |
            exec -- sort -k 4,4n |
            exec -- sed '/[67]\twork$/ s:work:weekend:' >"$dir/year.txt"
    } &
done

wait

# vim: set ft=zsh :