#!/bin/sh
# A script to automatically detect links and weechat-matrix files.
# Opens dmenuhandler for selected links,
# decrypts and rifles selected weechat-matrix files.

buffer="$(cat)"
#URLs:
urlregex="(((http|https|gopher|gemini|ftp|ftps|git)://|www\\.)[a-zA-Z0-9.]*[:]?[a-zA-Z0-9./@$&%?$\!\#=_~-]*)|((magnet:\\?xt=urn:btih:)[a-zA-Z0-9&=%-\.]*)"

urls="$(echo "$buffer" | sed 's/.*│//g' | tr -d '\n' | # First remove linebreaks and mutt sidebars:
	grep -aEo "$urlregex" | # grep only urls as defined above.
	awk '!seen[$0]++' | # Ignore duplicates but keep order of links
	sed 's/^www./http:\/\/www\./g')" # xdg-open will not detect url without http://

#Weechat-matrix files:
all="$(echo "$buffer" | perl -pe 's/[^│]*([^│]*?)│/\1/' |
	perl -pe 's/^.*?\| //' |
	sed 's/ │.*//' |
	head -n-2 | tr -d '\n'|
	grep -aEo '(<[^]><]*> |\[[^]]*:\/\/[^]]*\])' |
	grep -Ev "<(Unable to|Message redacted)" )" #filter out <Unable to decrypt: and <Message redacted by: <user>...


[ -z "$all" ] && [ -z "$urls" ] && exit;

filenames="$( echo "$all" | sed -n '/\[*\]/{g;1!p};h' | tr -d '<>')"
links="$( echo "$all" | grep -E '^\[' | tr -d [])"
#Debugging:
#echo "filenames:$filenames"
#echo "links:$links"
#echo "urls:$urls"
if [ -n "$filenames" ]; then
	selection="$( echo "$filenames" | tac)"
	prompt="file"
	if [ -n "$urls" ]; then
		selection="$(printf "%s\n%s\n" "$selection" "$urls")"
		prompt="file/link"
	fi
elif [ -n "$urls" ]; then
	selection="$urls"
	prompt="link"
else
	exit
fi

choice="$(echo "$selection" | dmenu -i -p "open which $prompt?" -l 10)"
[ -z "$choice" ] && exit

#TODO: check for robustness of multifile support
echo "$choice" | tac | while read -r choiceline; do
	#open dmenuhandler for URLs
	if echo "$urls" | grep -q "^$choiceline$"; then
		dmenuhandler "$choiceline"
	#decrypt and open weechat-matrix files
	else
		linenr="$(echo "$filenames" | awk "/$choiceline/ {print NR}")"
		#TODO: fix this stupid implementation, what if both were selected?
		if [ "$(echo "$linenr" | wc -l)" -gt 1 ]; then
			notify-send "weechatdl" "Multiple files by that name, choose by URL"
			link="$(echo "$links" | tac | dmenu -i -p 'open which file?' -l 10)"
		else
			link="$(echo "$links" | awk "NR==$linenr")"
		fi
		echo "link:$link"
		if [ "$(echo "$link" | wc -l)" -eq 1 ]; then
			if echo "$link" | grep -qE '^emxc'; then
				matrix_decrypt "$link" "/tmp/$choiceline"
			else
				curl -L "$link" -o "/tmp/$choiceline"
			fi
			## OPENING OF FILE
			# assume EDITOR to be terminal based
			# thus open in new terminal instance.
			if rifle -l "/tmp/$choiceline" | head -n1 | grep -qE '(EDITOR|PAGER)';then
				${TERMINAL:-st} rifle "/tmp/$choiceline" &
			else
				rifle "/tmp/$choiceline"
			fi

		else
				notify-send "weechatdls" "multi-link downloads not yet supported"
		fi
	fi
done