#! /bin/bash

# just gonna assume you're executing in the scripts folder

# build the blog files
cd ../blog || exit
CONTENTNUM=$(($( find . -type f -name "content-*" | wc -l)-1))
for ((i=-1;i<CONTENTNUM;i++))
do
	# separate files by respective static pages
	padint="$(printf %03d "$i")"
	contentname="content-$padint"
	quotename="quote-$padint"
	tailname="tail-$padint"
	blogname="blog-$padint"

	# interactive tail
	if (( i >= 0 )) ;then 

		# prepare tail template
		cp filetail "$tailname"

		# increment int if the page exists 
		padintprev="$(printf %03d $((i - 1)) )"
		if (( $((i+1)) == CONTENTNUM )) ;then
			padintnext="$(printf %03d -1 )"
		else
			padintnext="$(printf %03d $((i + 1)) )"
		fi

		# replace placeholders
		sed "	s/PREVPADINT/$padintprev/g;
			s/NEXTPADINT/$padintnext/g" filetail > "$tailname"
	fi

	# cat together for blog page
	if [[ -f $contentname ]] ;then
		cat filehead "$contentname" "$tailname" "$quotename" > "$blogname"
	fi
done

# compile items for rss
cd ../blog || exit

# get replace point in templates
linereplace=$(grep -n '$itemlist' .rss.template | cut -f1 -d:)
itemlinereplace=$(grep -n '$item' .rss.item.template | cut -f1 -d:)

# build rss feed
cat \
<(head -n $(( linereplace -1 )) .rss.template |
	sed "s/PUBDATE/$(date -R)/" ) \
<(
	for ((i=1;i<10;i++))
	do
		export padint=$( printf %03d $(( CONTENTNUM -i )) )
		cat \
			<(
				head -n $(( itemlinereplace -1 )) .rss.item.template | 
				title=$(jq -r '.data | .['"$padint"'].title' .data.json ) \
				perl -pe 's/TITLE/$ENV{title}/; s/CURRENTINT/$ENV{padint}/' 
			) \
			<(
				cat content-$padint quote-$padint | 
				tidy -q -asxml | 
				xq -cx '.html.body' |
				tr '\n' ' ' |
				printf "<![CDATA[$(cat -)]]"
			) \
			<(
				tail -n +$(( itemlinereplace +1 )) .rss.item.template |
				pubdate=$(jq -r '.data | .['"$padint"'].published_date' .data.json ) \
				guid=$(jq -r '.data | .['"$padint"'].guid' .data.json ) \
				perl -pe 's/PUBDATE/$ENV{pubdate}/; s/GUID/$ENV{guid}/'
			)
	done
) \
<(tail -n +$(( linereplace +1 )) .rss.template) \
> rss.xml

# clean up non prod files, lock down permissions, and self-destruct
cd ../blog || exit
\rm filehead filetail content* quote* .blog.* tail*
cd ../ || exit
\rm -rf .git scripts .index.html.* README.md Jenkinsfile
find . -type f -exec chmod 600 {} \;
find . -type d -exec chmod 700 {} \;