From 59aa9fca8b63a0257f827dd4d2da08090f285193 Mon Sep 17 00:00:00 2001
From: "Kay Marquardt (Gnadelwartz)" <kay@rrr.de>
Date: Mon, 27 May 2019 16:59:39 +0200
Subject: [PATCH] start of antiFlood addon

---
 addons/antiFlood.sh | 78 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 addons/antiFlood.sh

diff --git a/addons/antiFlood.sh b/addons/antiFlood.sh
new file mode 100644
index 0000000..c36634b
--- /dev/null
+++ b/addons/antiFlood.sh
@@ -0,0 +1,78 @@
+#!/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
+#  
+
+# used events:
+#
+# BASHBOT_EVENT_TEXT	message containing message text received
+# BASHBOT_EVENT_CMD	a command is recieved
+# 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
+#
+# prameters on events
+# $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
+
+# any global variable defined by addons MUST be prefixed by addon name
+ANTIFLOOD_ME="antiflood"
+
+declare -A ANTIFLOOD_CHATS ANTIFLOOD_ACTUALS
+export ANTIFLOOD_CHATS ANTIFLOOD_ACTUALS
+
+ANTIFLOOD_DEFAULT="5"	# 5 files per minute
+ANTIFLOOD_BAN="5"	# 5 minutes
+
+# initialize after installation or update
+if [[ "$1" = "init"* ]]; then 
+	: # nothing
+fi
+
+
+# register on startbot
+if [[ "$1" = "start"* ]]; then 
+    #load existing chat settings on start
+    jssh_readDB "ANTIFLOOD_CHATS" "${ADDONDIR:-./addons}/$ANTIFLOOD_ME"
+
+    # register to CMD
+    BASHBOT_EVENT_CMD["${ANTIFLOOD_ME}"]="${ANTIFLOOD_ME}_cmd"
+
+	# command /antiflood starts addon, $1 floodlevel $2 bantime
+    antiflood_cmd(){
+	case "${CMD[0]}" in
+		"/antifl"*)
+			ANTIFLOOD_CHATS["${CHAT[ID]}","level"]="${ANTIFLOOD_DEFAULT}"
+			ANTIFLOOD_CHATS["${CHAT[ID]}","ban"]="${ANTIFLOOD_BAN}"
+			[[ "${CMD[1]}"  =~ ^[0-9]+$  ]] && ANTIFLOOD_CHATS["${CHAT[ID]}","level"]="${CMD[1]}"
+			[[ "${CMD[2]}"   =~ ^[0-9]+$ ]] && ANTIFLOOD_CHATS["${CHAT[ID]}","ban"]="${CMD[2]}"
+			# antiflood_save &
+		;;
+	esac
+    }
+
+    # register to inline and command
+    BASHBOT_EVENT_TEXT["${ANTIFLOOD_ME}"]="${ANTIFLOOD_ME}_multievent"
+    BASHBOT_EVENT_FILE["${ANTIFLOOD_ME}"]="${ANTIFLOOD_ME}_multievent"
+
+    antiflood_multievent(){
+	# not started
+	[ "${ANTIFLOOD_CHATS["${CHAT[ID]}","level"]}" = "" ] && return
+	# count flood messages
+	[ "$1" = "text" ] && [ "${#MESSAGE[0]}" -lt "5" ] && (( ANTIFLOOD_ACTUALS["${CHAT[ID]}","${USER[ID]}"] += 1 ))
+	# shellcheck disable=SC2154
+	[ "$1" = "file" ] && (( ANTIFLOOD_ACTUALS["${CHAT[ID]}","${USER[ID]}","file"] += 1 ))
+	# antiflood_check &
+    }
+fi