telegram-bot-bash/addons/antiFlood.sh

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#!/bin/bash
# file: addons/antiFlood.sh.dist
#
# this addon counts how many files, e.g. stickers, are sent to
# a chat and takes actions if threshold is reached
#
#### $$VERSION$$ v1.25-dev-14-g2fe6d4b
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# used events:
#
# BASHBOT_EVENT_TEXT message containing message text received
# BASHBOT_EVENT_CMD a command is received
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# BASHBOT_EVENT_FILE file received
#
# all global variables and functions can be used in registered functions.
#
# parameters when loaded
# $1 event: init, startbot ...
# $2 debug: use "[[ "$2" = *"debug"* ]]" if you want to output extra diagnostic
#
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# parameters on events
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# $1 event: inline, message, ..., file
# $2 debug: use "[[ "$2" = *"debug"* ]]" if you want to output extra diagnostic
#
# shellcheck disable=SC2140
# export used events
export BASHBOT_EVENT_TEXT BASHBOT_EVENT_CMD BASHBOT_EVENT_FILE BASHBOT_EVENT_TIMER
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# any global variable defined by addons MUST be prefixed by addon name
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ANTIFL_ME="antiFlood"
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declare -Ax ANTIFL_CHATS ANTIFL_ACTUALS
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ANTIFL_DEFAULT="5" # 5 files per minute
ANTIFL_BAN="5" # 5 minutes
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# initialize after installation or update
if [[ "$1" = "init"* ]]; then
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jssh_newDB "addons/${ANTIFL_ME}"
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fi
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# register on startbot
if [[ "$1" = "start"* ]]; then
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ANTIFL_ADMIN="$(getConfigKey "botadmin")"
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#load existing chat settings on start
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jssh_readDB "ANTIFL_CHATS" "addons/${ANTIFL_ME}"
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# register to CMD
BASHBOT_EVENT_CMD["${ANTIFL_ME}"]="${ANTIFL_ME}_cmd"
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antiFlood_cmd(){
# shellcheck disable=SC2153
local chat="${CHAT[ID]}"
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case "${CMD[0]}" in
# command /afstart starts detection, $1 floodlevel
"/afstart")
# allow bot admin to activate for other chats
[[ "${CMD[3]}" =~ ^[-0-9]+$ ]] && user_is_botadmin "${USER[ID]}" && chat="$3"
[[ "${CMD[1]}" =~ ^[0-9]+$ ]] && ANTIFL_CHATS["${chat}","level"]="${CMD[1]}" \
|| ANTIFL_CHATS["${chat}","level"]="${ANTIFL_DEFAULT}"
[[ "${CMD[2]}" =~ ^[0-9]+$ ]] && ANTIFL_CHATS["${chat}","ban"]="${CMD[2]}" \
|| ANTIFL_CHATS["${chat}","ban"]="${ANTIFL_BAN}"
antiFlood_timer
send_normal_message "${USER[ID]}" "Antiflood set for chat ${chat}" &
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;;
# command /afactive starts counter meausares
"/afdo" | "/afactive")
[[ "${CMD[1]}" =~ ^[-0-9]+$ ]] && user_is_botadmin "${USER[ID]}" && chat="$3"
ANTIFL_CHATS["${chat}","active"]="yes"
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jssh_writeDB "ANTIFL_CHATS" "addons/${ANTIFL_ME}" &
send_normal_message "${USER[ID]}" "Antiflood activated for chat ${chat}" &
;;
# command /afactive starts counter meausares
"/afstop")
[[ "${CMD[1]}" =~ ^[-0-9]+$ ]] && user_is_botadmin "${USER[ID]}" && chat="$3"
ANTIFL_CHATS["${chat}","active"]="no"
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jssh_writeDB "ANTIFL_CHATS" "addons/${ANTIFL_ME}" &
send_normal_message "${USER[ID]}" "Antiflood stopped for chat ${chat}" &
;;
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esac
}
# register to timer
BASHBOT_EVENT_TIMER["${ANTIFL_ME}","${ANTIFL_BAN}"]="antiFlood_timer"
# save settings and reset flood level every BAN Min
antiFlood_timer(){
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ANTIFL_ACTUALS=( )
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jssh_writeDB "ANTIFL_CHATS" "addons/${ANTIFL_ME}" &
}
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# register to inline and command
BASHBOT_EVENT_TEXT["${ANTIFL_ME}"]="${ANTIFL_ME}_multievent"
BASHBOT_EVENT_FILE["${ANTIFL_ME}"]="${ANTIFL_ME}_multievent"
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antiFlood_multievent(){
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# not started
[ -z "${ANTIFL_CHATS["${CHAT[ID]}","level"]}" ] && return
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# count user flood text
if [ "$1" = "text" ]; then
if [ "${#MESSAGE[0]}" -gt "${ANTIFL_CHATS["${CHAT[ID]}","level"]}" ]; then
(( ANTIFL_ACTUALS["${CHAT[ID]}","${USER[ID]}"]-- ))
# shellcheck disable=SC2154
(( ANTIFL_ACTUALS["${CHAT[ID]}","${USER[ID]}","file"]-- ))
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else
# shellcheck disable=SC2154
(( ANTIFL_ACTUALS["${CHAT[ID]}","${USER[ID]}"]++ ))
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fi
fi
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# count user chat flood
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if [ "$1" = "file" ]; then
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# shellcheck disable=SC2154
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(( ANTIFL_ACTUALS["${CHAT[ID]}","${USER[ID]}","file"]++ ))
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# shellcheck disable=SC2154
(( ANTIFL_ACTUALS["${CHAT[ID]}","file"]++ ))
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antiFlood_action & # do actions in subshell
fi
}
# check and handle actions
antiFlood_action() {
# check flood level of user
if [ "$(( ANTIFL_ACTUALS["${CHAT[ID]}","${USER[ID]}","file"] +1))" -gt "${ANTIFL_CHATS["${CHAT[ID]}","level"]}" ]; then
if [ "${ANTIFL_CHATS["${CHAT[ID]}","active"]}" = "yes" ]; then
# remove message
delete_message "${CHAT[ID]}" "${MESSAGE[ID]}"
else
# inform admin
send_markdown_message "${ANTIFL_ADMIN}" "User ${USER[USERNAME]} reached flood level in chat ${CHAT[USERNAME]}!"
fi
fi
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# check flood level of chat
if [ "$(( ANTIFL_ACTUALS["${CHAT[ID]}","file"] +1))" -gt "$(( ANTIFL_CHATS["${CHAT[ID]}","level"] * ANTIFL_BAN ))" ]; then
if [ "${ANTIFL_CHATS["${CHAT[ID]}","active"]}" = "yes" ]; then
# remove message
delete_message "${CHAT[ID]}" "${MESSAGE[ID]}"
else
# inform admin
send_markdown_message "${ANTIFL_ADMIN}" "Chat ${CHAT[USERNAME]} reached max flood level!"
fi
fi
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}
fi