#!/bin/sh
set -e

FSUBRC=~/.config/fsubrc

usage() {
	echo "usage: fsub <file>"
	echo "fsub expects $FSUBRC to have a blacklist of words"
	exit 1
}

[ -z $1 ] && usage
[ -f $1 ] || usage
[ -z $2 ] || usage
[ -f $FSUBRC ] || touch $FSUBRC

cp $1 $1.bak
awk '
BEGIN {
	n = 1
	i = 0
	while(getline < "'$FSUBRC'") {
		blacklist[i] = $0
		i++
	}
}
/^[[:digit:]]+[[:space:]]*$/ { 
	getline
	time = $0

	linen = 0
	while(getline) {
		lines[linen] = $0
		linen++
		if($0 ~ /^[[:space:]]*$/) break
	}

	for(j = 0; j < i; j++)
		for(k = 0; k < linen; k++)
			if(lines[k] ~ blacklist[j]) next

	print n
	n++
	print time
	for(j = 0; j < linen; j++)
		print lines[j]
}' $1 | sed 's/\r//' > /tmp/fsub
mv /tmp/fsub $1
rm $1.bak