#!/bin/bash
# concatenate posts in a single html document
##this is an old version of the script##

#script base
ROOT="$HOME/www/mountaineerbr.github.io/blog"

#html filenames
#cat.html is a clone of index.html with modifications
TARGET="$ROOT/cat.html"
BAK="$ROOT/cat.bak$( date +%s ).html"

#get article and
#change base directory of sources
artf()
{
	local a c
	
	#get post directory number
	a="${1%/}"
	a="${a##*/}\/"
	c='src=\"'

	sed -n '/<article>/,/<\/article>/p' "$1/index.html" |
		sed -Ee "/<img/ s/${c}/&${a}/" \
		     -e "/<source/ s/${c}/&${a}/"
		     #probably useless
		     #-e "/<video/ s/${c}/&${a}/"
		     #-e "/<audio/ s/${c}/&${a}/"

	ret="${PIPESTATUS[*]}"
	[[ "$ret" = *[1-9]* ]] && return 1
	return 0
}


#start

#test target files exist
#changing to $ROOT is required for next steps!
if ! cd "$ROOT"
then
	echo "blog root directory does not exist -- $ROOT" >&2
	exit 1
elif [[ ! -f "$TARGET" ]]
then
	echo "file missing -- $TARGET" >&2
	exit 1
fi

#get a list of post directories
while read
do
	DIRS+=( "$REPLY" )
done <<<"$( printf '%s\n' [0-9]*/ | sort -nr )"

#check directory arrau is not empty
(( ${#DIRS[@]} )) || exit 1

#get all articles
for dir in "${DIRS[@]}" 
do
	#add article and blank lines
	ARTS+="$( artf "$dir" )

<br><br>
" || exit 1
done

#get top and bottom of cat.html
TOP="$( sed -n "1,/<\/header>/ p" "$TARGET" )" || exit
BOTTOM="$( sed -n "/<footer>/,$ p" "$TARGET" )" || exit

#backup
mv -v "$TARGET" "$BAK"

#make new cat.html
{
	echo "$TOP"
	echo
	echo "$ARTS"
	echo
	echo "$BOTTOM"
} > "$TARGET"