#!/bin/bash
# Shift lines from the current presentation tabel to the past overview 
# Works with a crontab entry which is invoked on the fourth Tuesday of any given
# months assuming that it's not December :-)
#

DIR=~jens/git/hugo
date >$DIR/dat.txt

# Check if invoked on a Wednesday
if [[ $(date +%w) -eq 2 ]] ; then
    VOR=$DIR/vor.md
    PAST=$DIR/past.md
 
# Are we in December (one line of entries left)?   
    if [ $(wc -l <$VOR) -gt 1 ] ; then
	DA=$(date +%d.%-m.%Y)
# Insert date for past presentations if omitted in the template
# Do this for multiple lines
	A=$(head -1 $VOR | python3 /usr/local/bin/modDate.py | fgrep $DA)
	if [[ -n $A ]] ; then 
	    cp $PAST $PAST.org
	    cp $VOR $VOR.org
	    echo -e "$A\n$(cat $PAST)" >$PAST
	    tail -n +2 $VOR >$VOR.0
	    mv $VOR.0 $VOR
	fi
    fi
fi