#!/bin/bash
#===============================================================================
# shellcheck disable=SC2059
#
#          FILE: bin/broadcast_message.sh
# 
USAGE='broadcast_message.sh [-h|--help] [--doit] [--groups|--both|--db=file] [format] "message ...." [debug]'
# 
#   DESCRIPTION: send a message to all users listed in a jsonDB (default count db)
# 
#       OPTIONS: --doit - broadcast is dangerous, simulate run without --doit
#                --groups - send to groups instead of users
#                --both - send to users and groups (default with --db)
#                --db name - send to all user/groups in jsonDB database (e.g. blocked)
#                     db file: name.jssh, db keys are user/chat id, values are ignored
#
#                format - normal, markdown, html (optional)
#                message - message to send in specified format
#                    if no format is givern send_message() format is used
#
#                -h - display short help
#                --help -  this help
#
#                Set BASHBOT_HOME to your installation directory
#
#	LICENSE: WTFPLv2 http://www.wtfpl.net/txt/copying/
#        AUTHOR: KayM (gnadelwartz), kay@rrr.de
#       CREATED: 16.12.2020 16:14
#
#### $$VERSION$$ v1.25-dev-52-gb9c3235
#===============================================================================

####
# minimum messages seen in a chat before send a broadcast to it
MINCOUNT=2
USERDB=""

####
# broadcast is dangerous, without --doit we do a dry run ...
if [ "$1" = "--doit" ]; then
	DOIT="yes"
	shift
fi

####
# send to users by default, --group sends groups, --both to both
SENDTO="users"
if [ "$1" = "--both" ]; then
	GROUPSALSO=" and groups"
	shift
elif [ "$1" = "--groups" ]; then
	SENDTO="groups"
	GROUPSALSO=" only"
	shift
elif [ "$1" = "--db" ]; then
	USERDB="${2%.jssh}"
	MINCOUNT=""
	GROUPSALSO=" and groups"
	shift 2
fi

####
# parse args -----------------
SEND="send_message"
case "$1" in
	"nor"*|"tex"*)
		SEND="send_normal_message"
		shift
		;;
	"mark"*)
		SEND="send_markdownv2_message"
		shift
		;;
	"html")
		SEND="send_html_message"
		shift
		;;
	'')
		printf "missing missing arguments\n"
		;&
	"-h"*)
		printf 'usage: %s\n' "${USAGE}"
		exit 1
		;;
	'--h'*)
		sed -n -e '/# shellcheck /d' -e '3,/###/p' <"$0"
		exit 1
		;;
esac

# set bashbot environment
# shellcheck disable=SC1090
source "${0%/*}/bashbot_env.inc.sh" "$2" # $3 debug


# read in users from given DB or count.jssh 
database="${USERDB:-${COUNTFILE}}"
declare -A SENDALL
jssh_readDB_async "SENDALL" "${database}"
if [ -z "${SENDALL[*]}" ]; then
	printf "${ORANGE}User database not found or empty: ${NC}${database}\n"
fi

	# loop over users
	printf "${GREEN}Sending broadcast message to ${SENDTO}${GROUPSALSO} of ${BOT_NAME} using database:${NC}${GREY} ${database##*/}"

{ 	# dry run
	[ -z "${DOIT}" ] && printf "${NC}\n${ORANGE}DRY RUN! use --doit as first argument to execute broadcast...${NC}\n"

	for USER in ${!SENDALL[*]}
	do
		# send to users, groups or both ...
		[[ -z "${GROUPSALSO}" && "${USER}" == *"-"* ]] && continue
		[[ "${SENDTO}" != "users" && "${USER}" != *"-"* ]] && continue
		# ignore everything not a user or group
		[[ ! "${USER}" =~ ^[0-9-]*$ ]] && continue
		# ignore chats with no count or lower MINCOUNT
		[[ -n "${MINCOUNT}" && ( ! "${SENDALL[${USER}]}" =~ ^[0-9]*$ || "${SENDALL[${USER}]}" -lt "${MINCOUNT}" ) ]] && continue 
		(( COUNT++ ))
		if [ -z "${DOIT}" ]; then
			printf  "${SEND} ${USER} $1 $2\n" 
		else
			"${SEND}" "${USER}" "$1" "$2"
			printf  "." 1>&2
			# ups, kicked or banned ...
			if [ "${BOTSENT[ERROR]}" = "403" ]; then
				# remove chat from future broadcasts
				jssh_insertKeyDB "${USER}" "${SENDALL[${USER}]} banned" "${COUNTFILE}"
				printf "${ORANGE}Warning: bot banned from chat${NC} %s ${ORANGE}after${NC} %s ${ORANGE}commands${NC}\n"\
						"${USER}" "${SENDALL[${USER}]}"
			fi
			sleep 0.1
		fi
	done
	# printout final stats message
	printf "${NC}\n${GREEN}Message${NC} $1 ${GREEN}sent to${NC} ${COUNT} ${GREEN}${SENDTO}${GROUPSALSO}.${NC}\n"
} | more