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#!/bin/sh

book_conf="${XDG_CONFIG_HOME:-$HOME/.config}/dbook/dbook.conf"
book_data="${XDG_DATA_HOME:-$HOME/.local/share}/dbook"
w_menu="bemenu"
x_menu="dmenu"
ico_dbk=" "
ico_url="󰖟 "
ico_doc=" "
ico_pic=" "
ico_vid=" "
ico_mus="󰸪 "
ico_fil=" "
ico_txt=" "
ico_dir=" "

usage()
{
	cat <<- EOF
	Usage: dbook [ command ] [ option ]
	a bookmark manager using dmenu
	Commands:
	  help	 show this help cruft
	  insert [ value [ key ] ], inset a new key
	  save	 [ value [ key ] ], inset but make a cp if it's a file
	  rm	 [ key ], delete a key
	Options:
	  -t	 [ key ], type the vlaue
	  -c	 [ key ], copy the value to clipboard

	EOF
}

note()
{
	: "${1:?}"

	command -v notify-send > /dev/null &&
		notify-send -- "${ico_dbk} dbook" "$1"
}

die()
{
	: "${1:?}"

	note "$1"
	printf "\033[31;1merr: %b\033[0m\n" "$1" 1>&2
	exit "${2:-1}"
}

warn()
{
	: "${1:?}"

	note "$1"
	printf "\033[33;1merr: %b\033[0m\n" "$1" 1>&2
}

dep_check()
{
	: "${1:?}"

	for dep; do
		command -v "$dep" 1>/dev/null ||
			die "$dep not found, please install it" 127
	done

	unset dep
}

trim()
{
	: "${1:?}"

	_trimstr="${1#"${1%%[![:space:]]*}"}"
	_trimstr="${_trimstr%"${_trimstr##*[![:space:]]}"}"

	echo "$_trimstr"
}

load_icon()
{
	case "$(file --brief --dereference --mime-type "$1")" in
	image/*) printf "%s" "$ico_pic" ;;
	video/*) printf "%s" "$ico_vid" ;;
	audio/*) printf "%s" "$ico_mus" ;;
	text/*)	 printf "%s" "$ico_txt" ;;
	inode/*) printf "%s" "$ico_dir" ;;
	application/pdf) printf "%s" "$ico_doc" ;;

	*'No such file or directory)')
		if echo "$1" | grep -qxE '^(https?://)?[^/]*\.[A-Za-z0-9]*(/.*)?'; then
			printf "%s" "$ico_url"
		else
			printf "%s" "$ico_fil"
		fi
	esac
}

parse_data()
{
	# usage parse_data [ getval <key> ]
	line=
	_key=
	_value=

	while read -r line
	do
		[ -z "$line" ] && continue

		_key="${line%%|*}"
		_key="$(trim "$_key")"

		case "$_key" in
		#*) continue
		esac

		if [ "$1" = "getval" ]; then
			[ "$2" != "$_key" ] && continue

			_value="${line##*|}"
			_value="$(trim "$_value")"
			echo "$_value"
			return 0
		else
			echo "$_key"
		fi
	done < "$book_conf"

	unset _key _value
	[ "$1" = "getval" ] && return 1
}

rm_data()
{
	# usage rm_data <key>
	: "${1:?}"
	cl=
	line=
	file=
	value=
	old_ifs="$IFS"

	IFS=
	while read -r line
	do
		cl="$line\n"

		key="$(trim "${cl%%|*}")"
		# catch match
		if [ "$key" = "$1" ]; then
			value="$(trim "${cl##*|}")"

			# delete if saved
			case "$value" in
			"$book_data"*) rm -f "$value"
			esac
			continue
		fi

		file="${file}${cl}"
	done < "$book_conf"

	IFS="$old_ifs"
	# shellcheck disable=SC2059
	printf "$file" > "$book_conf"
	unset cl line file value old_ifs
}

clip()
{
	# usage: clip [ file/text ] <value>
	: "${1:?}"
	: "${2:?}"

	if [ -n "$WAYLAND_DISPLAY" ]; then
		dep_check "wl-copy"

		[ "$1" = "text" ] &&
			printf "%s" "$2" | wl-copy
		[ "$1" = "file" ] &&
			printf "file://%s" "$2" | wl-copy -t text/uri-list
	elif [ -n "$DISPLAY" ]; then
		dep_check "xclip"

		[ "$1" = "text" ] &&
			printf "%s" "$2" | xclip -selection clipboard
		[ "$1" = "file" ] &&
			printf "file://%s" "$2" | xclip -selection clipboard "$1" -t text/uri-list
	fi

	note "${1} coppied to clipboard"
}

set_menu()
{
	if [ -n "$WAYLAND_DISPLAY" ]; then
		menu="$w_menu"
	elif [ -n "$DISPLAY" ]; then
		menu="$x_menu"
	else
		die "tty not supported"
	fi
}

ip_menu()
{
	printf "" | "$menu" -p "${ico_dbk} ${1:?} "
}

key_menu()
{
	parse_data | "$menu" -l 25 -p "${ico_dbk} key " || return 1
}


########
# MAIN #
########

key=
value=

[ -d "$book_data" ] ||
	mkdir -p "$book_data"
[ -d "$book_conf" ] ||
	mkdir -p "${book_conf%/*}"

set_menu
case "$1" in
-*) ;;
"") ;;
*)  command="$1" && shift
esac

case "$command" in
insert|save)
	value="${1:-$(ip_menu "value")}" || exit 1
	key="${2:-$(ip_menu "key")}" || exit 1
	value="$(trim "$value")"
	key="$(trim "$key")"

	parse_data getval "$key" > /dev/null &&
		die "key already in use"

	case "$command" in 
	insert)
		[ -e "$value" ] &&
			value="$(realpath "$value")"
		;;
	save)
		[  -d "$value" ] &&
			warn "${value} is a directory, will not be saved"
		if [ -f "$value" ]; then
			cp "$value" "$book_data"
			value="${book_data}/$(basename "$value")"
		fi
		;;
	esac

	case "$key" in
	[![:cntrl:][:print:]]*) ;; # check for unicode chars
	*)			icon="$(load_icon "$value")"
	esac

	printf "%s\t|\t%s\n" "${icon:+$icon }$key" "$value" >> "$book_conf"
	;;
rm)
	key="${1:-$(key_menu)}" || exit 1

	val="$(parse_data getval "$key")"
	case "$val" in
	${book_data}/*) rm "$val";;
	esac

	rm_data "$key"
	;;
"")
	dep_check "xdg-open"
	[ -s "$book_conf" ] ||
		die "no bookmarks, try dbook -h"

	key="${2:-$(key_menu)}" || exit 1
	value="$(parse_data getval "$key")" ||
		die "${key}: no such key"

	case "$1" in
	-t)
		if [ -z "$WAYLAND_DISPLAY" ]
		then
			dep_check "xdotool"
			xdotool type --delay 20 "$value"
		else
			dep_check "wtype"
			wtype -d 20 "$value"
		fi
		;;
	-c)
		case "$(file --brief --dereference --mime-type "$value")" in
		text/*)                        clip text "$(cat "$value")" ;;
		*'No such file or directory)') clip text "$value" ;;
		*)                             clip file "$value"
		esac
		;;
	"")
		xdg-open "$value" 2> /dev/null || clip text "$value" ;;
	*)
		die "${1}: invalid option"
	esac
	;;
help)   usage ;;
*)      die "$command, invalid command"
esac