Attempt to cut down on spam from greet and bye triggers. Add ping/pong to help deal with flakey connections.?

bot.sh

@@ -78,6 +78,10 @@ export nick
 export quitMessage
 export intentionalExit
 
+# Set default values for ping/pong monitoring if not configured
+pingInterval="${pingInterval:-120}"
+pongTimeout="${pongTimeout:-30}"
+
 # Check for critical dependencies needed by the bot core
 coreDependencies=("socat" "tail" "shuf" "grep" "sed" "tr" "cut" "date")
 missingCore=()
@@ -105,6 +109,74 @@ rm_input() {
     fi
 }
 
+# Function to stop ping monitor process
+stop_ping_monitor() {
+    if [[ -n "$pingMonitorPid" ]] && kill -0 "$pingMonitorPid" 2>/dev/null; then
+        kill "$pingMonitorPid" 2>/dev/null
+        wait "$pingMonitorPid" 2>/dev/null
+    fi
+    # Clean up ping/pong tracking files
+    rm -f "${input}.lastping" "${input}.lastpong" 2>/dev/null
+}
+
+# Start background ping monitor process
+# Sends PING at regular intervals and monitors for PONG responses
+start_ping_monitor() {
+    # Only start if ping interval is greater than 0
+    if [[ "$pingInterval" -le 0 ]]; then
+        return
+    fi
+
+    # Stop any existing monitor
+    stop_ping_monitor
+
+    # Capture variables for the background process
+    local monitorInput="$input"
+    local monitorLog="$log"
+    local monitorServer="$server"
+    local monitorPort="$port"
+    local monitorDateFormat="$dateFormat"
+    local monitorPingInterval="$pingInterval"
+    local monitorPongTimeout="$pongTimeout"
+
+    # Start ping monitor in background
+    (
+        while true; do
+            sleep "$monitorPingInterval"
+            # Send PING with timestamp
+            currentTime=$(date +%s)
+            echo "PING :healthcheck_${currentTime}" >> "$monitorInput"
+            echo "$currentTime" > "${monitorInput}.lastping"
+
+            # Wait for pong timeout period and check if we got a response
+            sleep "$monitorPongTimeout"
+
+            # Check if we received a PONG
+            if [[ -f "${monitorInput}.lastpong" ]]; then
+                lastPongTime=$(cat "${monitorInput}.lastpong")
+                # If last pong is newer than last ping, we're good
+                if [[ "$lastPongTime" -ge "$currentTime" ]]; then
+                    continue
+                fi
+            fi
+
+            # No PONG received within timeout - connection is likely dead
+            echo "No PONG received within ${monitorPongTimeout}s. Connection appears dead. [$(date "+$monitorDateFormat")]" >> "$monitorLog"
+            # Kill the socat process to trigger reconnection
+            # Escape regex metacharacters in server and port to prevent injection
+            safeServer="${monitorServer//./\\.}"
+            safeServer="${safeServer//[/\\[}"
+            safeServer="${safeServer//]/\\]}"
+            safeServer="${safeServer//\*/\\*}"
+            safePort="${monitorPort//[^0-9]/}"
+            # Find and kill the socat process for this bot
+            pkill -f "socat.*${safeServer}:${safePort}" 2>/dev/null
+            exit 0
+        done
+    ) &
+    pingMonitorPid=$!
+}
+
 # Function to trim log file to prevent unbounded growth
 # Keeps log between 800-1000 lines by trimming oldest entries when limit reached
 trim_log() {
@@ -127,8 +199,12 @@ trim_log() {
     fi
 }
 
-# Trap exiting ffrom the program to remove the temporary input file.
-trap rm_input  EXIT
+# Trap exiting from the program to remove the temporary input file and stop ping monitor
+cleanup_on_exit() {
+    stop_ping_monitor
+    rm_input
+}
+trap cleanup_on_exit EXIT
 
 # Flag to track intentional shutdown (set by exit module)
 intentionalExit=false
@@ -159,6 +235,9 @@ while true; do
     # Counter for log trimming (check every 50 messages)
     logTrimCounter=0
 
+    # Start ping monitor for this connection
+    start_ping_monitor
+
     tail -f "$input" | socat -,ignoreeof "$socatAddress" | while read -r result ; do
     # Strip carriage return from IRC protocol (CRLF line endings)
     result="${result%$'\r'}"
@@ -190,6 +269,15 @@ while true; do
         PING*)
             echo "${result/I/O}" >> "$input"
         ;;
+        # track pong responses for connection health monitoring
+        # Match PONG as IRC command, not user messages containing "pong"
+        *" PONG "*|PONG*)
+            # Only process if NOT a user PRIVMSG (prevents spoofing)
+            if [[ ! "$result" =~ PRIVMSG ]]; then
+                # Update last pong timestamp
+                date +%s > "${input}.lastpong"
+            fi
+        ;;
         # for pings on nick/user
         *"You have not"*)
             for channelName in "${channels[@]}"; do
@@ -338,6 +426,9 @@ while true; do
     done
 
     # If we reach here, the connection was dropped
+    # Stop the ping monitor for this connection
+    stop_ping_monitor
+
     # Check if this was an intentional exit
     if [[ "$intentionalExit" == "true" ]]; then
         echo "Bot shutdown requested. Exiting. [$(date "+$dateFormat")]" | tee -a "$log"