Lay the groundwork for responding to IRC messages

rowbot

@@ -57,6 +57,14 @@ has() {
   fi
 }
 
+is_action() {
+  [[ ${msg[cmd]} = PRIVMSG && ${msg_args[-1]:0:${#config[trigger]}} = "${config[trigger]}" ]]
+}
+
+is_chan() {
+  [[ ${msg_args[${1:-0}]} = \# ]]
+}
+
 is_parent() {
   (( BASHPID == $$ ))
 }
@@ -79,11 +87,12 @@ run_callbacks() {
     return 1
   fi
 
-  local filter=$1
+  local status=0 filter=$1
   shift
 
   while IFS= read -r; do
     "$REPLY" "$@"
+    (( status |= $? ))
   done < <(compgen -A function "$filter")
 
   return 0
@@ -614,6 +623,7 @@ while net_recv line; do
   # alphabet values
 
   msg[cmd]=${line%% *} line=${line#"${msg[cmd]}"} line=${line# }
+  msg[cmd]=${msg[cmd]^^}
   log_debug "parsing message command %s" "${msg[cmd]}"
 
   # parse the remaining values into white-space separated arguments
@@ -633,7 +643,7 @@ while net_recv line; do
     fi
   done
 
-  if [[ ${msg[cmd]^^} = @(PRIVMSG|NOTICE) ]]; then
+  if [[ ${msg[cmd]} = @(PRIVMSG|NOTICE) ]]; then
     case ${msg_args[-1]} in
     "["*"]")
       (( msg[score] += 20 ))
@@ -645,9 +655,24 @@ while net_recv line; do
 
   log_debug "bot score is %d" "${msg[score]}"
 
-  if has irc_on_"${msg[cmd]^^}"; then
+  if has irc_on_"${msg[cmd]}"; then
-    irc_on_"${msg[cmd]^^}"
+    if run_callbacks "on_msg_${msg[cmd]}_"; then
+      log_debug "handler for %s was skipped" "${msg[cmd]}"
+    else
+      irc_on_"${msg[cmd]}"
+    fi
+
+    run_callbacks "on_late_msg_${msg[cmd]}_"
   else
     log_warn "unhandled line: %s" "${msg[original]}"
   fi
+
+  if is_action; then
+    action=${msg_args[-1]#"${config[trigger]}"} action=${action%% *}
+    action_line=${msg_args[-1]#"$trigger$action"}
+    read -r action_line <<< "$action_line"
+    # This variable will be used in later code.
+    # shellcheck disable=SC2034
+    read -ra action_args <<< "$action_line"
+  fi
 done