#!/bin/bash

#comchat.sh - very lazy terminal client for Chat@Heyuri

#this program has become substantial enough that I added license terms
#but said terms are basically just "leave my fucking name on it lmao"

#Copyright (c) 2026 miredo
#
#Permission is hereby granted, free of charge, to any person obtaining a
#copy of this software and associated documentation files (the "Software"),
#to deal in the Software without restriction, including without limitation
#the rights to use, copy, modify, merge, publish, distribute, sublicense,
#and/or sell copies of the Software, and to permit persons to whom the
#Software is furnished to do so, subject to the following conditions:
#
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
#THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
#FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
#DEALINGS IN THE SOFTWARE.

#TODO list:
# * load settings from files (~/.config/mrd_comchat/...)
# * load settings from arguments (getops!)
# * sound effect for new posts
# * kaomoji selector
# * eventually, rewrite in Python but I dunno if I care enough to bother

version="4.0"
refresh_time=30
user_color=15
my_trip=""
user_agent="$(curl --version | awk '{print $1"/"$2;exit}') comchat.sh/$version" #very dumb hack because curl doesn't give you a nice way to just get the version number
msg_raw=""
msg_old=""
new_msg=false

#strip out excess keypresses
cleanbuffer() {
	while read -t 0
	do
		read -N 1 -s
	done
}

#reset all colors
reset_col() {
	echo -e -n "\033[0m"
}

#show the full scrollback
check_scrollback() {
	echo "$msg_raw" | fold -w `tput cols` -s | less
}

#set the display color
#usage: set_col color bold
#color 30-37: blk, red, grn, ylw, blu, mag, cyn, wht
#40-47 set the background color
#bold is 1 or 0
set_col() {
	echo -e -n "\033[$2;$1m"
}

#read in the tripcode
set_tripcode() {
	reset_col
	IFS= read -p "tripcode (optional): " -e -r my_trip
}

#read in the username
set_username() {
	reset_col
	IFS= read -p "username: " -e -r username
}

#read in the update interval
set_interval() {
	reset_col
	IFS= read -p "update interval (min 15, default 30): " -e -r refresh_time
	refresh_time=$(($refresh_time))
	if (( refresh_time < 15 ))
	then
		refresh_time=15
	fi
}

#sends a message via cURL
#TODO: should we set our own referrer? might be useful/fun
send_msg() {
	reset_col
	IFS= read -p "message: " -e -r mymsg
	curl -s \
		--user-agent "$user_agent" \
		--data-urlencode "mode=regist" \
		--data-urlencode "name=$username" \
		--data-urlencode "email=" \
		--data-urlencode "password=$my_trip" \
		--data-urlencode "comment=$mymsg" \
		--data-urlencode "face=" \
		--data-urlencode "color=$user_color" \
		--data-urlencode "retime=0" \
		--data-urlencode "lines=1" \
		--data-urlencode "autoclear=on" \
		https://cgi.heyuri.net/chat/comchat.cgi > /dev/null

}

#shows the help
show_help() {
	reset_col
	clear
	set_col 36 1
	echo "command keys:"
	reset_col
	echo "q, Q - quit"
	echo "? - show this help message"
	echo "/ - send a message (leave blank to cancel) [refreshes]"
	echo "r, space, enter - refresh the chat [obviously refreshes lol]"
	echo "p, ; - view the chat scrollback (via the less command, press q"
	echo "       to exit the scrollback view)"
	echo "#, T - set the tripcode"
	echo "i - set the update interval (min 20s) [refreshes]"
	echo
	set_col 36 1
	echo "other notes:"
	reset_col
	echo "* refresh the chat if you change your terminal size"
	echo "* only the commands marked by [refreshes] will refresh, all"
	echo "  other commands will not (and the auto-refresh counter will"
	echo "  start back from the top)"
	echo "* all screens expect a minimum 80x24 terminal; you can get away"
	echo "  with less, but things may not look right"
	echo
	set_col 32 1
	echo "Press any key to continue."
	reset_col
	read -N 1 -s
}

#main program starts here
reset_col
clear
#show intro text
set_col 36 0
echo "miredo's very very lazy comchat client for Chat@Heyuri"
echo "version $version"
echo "user-agent: '$user_agent'"
#get user info
set_col 36 1
set_username
set_tripcode
echo

#chat refresh info
refresh=true
refresh_date=never

#main loop here
while true
do
	#get terminal size
	scr_w=`tput cols`
	scr_h=`tput lines`
	#load and format the message list
	reset_col
	#TODO: handle HTML entities somehow lol (or at least find and replace &quot; and &amp;)
	#TODO: strip all control characters - probably not ever going to be an issue, but there isn't a real reason to not do it for sanity's sake
	if [[ "$refresh" == "true" ]]
	then
		set_col 31 1
		echo -n "[loading...]"
		cleanbuffer
		msg_old="$msg_raw"
		msg_raw="$( curl -s https://cgi.heyuri.net/chat/simplelog.txt) "
		if [[ "$msg_raw" != "$msg_old" ]]
		then
			new_msg=true
		fi
		msg="$( echo "$msg_raw" | fold -s -w $scr_w | head -n $(expr $scr_h - 4) )"
		refresh_date="$(date)"
		refresh=false
	fi
	#draw the main screen
	clear
	set_col 44 0
	set_col 37 1
	echo "[refeshed on $refresh_date | ($scr_w"x"$scr_h) | reload: $refresh_time"s"]"
	#display the messages
	reset_col
	#highlight new message/most recent
	#white if old, yellow if new
	#TODO: this is where I'd play a sound too
	if [[ "$new_msg" == "true" && "$show_update" == "true" ]]
	then
		set_col 33 1
	else
		set_col 37 1
	fi
	new_msg=false
	show_update=false
	echo "$msg" | head -n 1 #dumb hack, highlights the first line
	reset_col
	echo "$msg" | tail -n +2
	set_col 44 0
	set_col 37 1
    echo "keys: q-quit, /-send, r-refresh, ?-help"
	reset_col
	#handle user commands
	read -t $refresh_time -N 1 -s inp
	case "$inp" in
		r| "" | " ") #refresh
			refresh=true
			show_update=true
		;;
		q | Q) #quit
			clear
			exit 1
		;;
		"/") #post
			send_msg
			refresh=true
			show_update=false
		;;
		p | s | ";") #view whole scrollback of posts
			check_scrollback
		;;
		h | "?") #show help
			show_help
		;;
		T | "#") #set tripcode
			set_tripcode
		;;
		i) #set update interval
			set_interval
			refresh=true
			show_update=true
		;;
	esac
	cleanbuffer
	if [[ "$refresh" == "true" ]]
	then
		set_col 33 1
		echo -n "[refreshing...] "
		#minimum time so we don't hammer the site with a bunch of requests
		#lowered it from before to improve responsiveness
		sleep 0.5
	fi
	reset_col
done