Looking for a way to spot deprecated triggers

<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE muclient>

<muclient>
<plugin
   name="Show_Unused_Triggers"
   author="Nick Gammon"
   id="dd839eeea8735913421b7194"
   language="Lua"
   purpose="Shows unused triggers"
   save_state="y"
   date_written="2019-04-22 08:02:08"
   requires="5.00"
   version="1.0"
   >
<description trim="y">
<![CDATA[
Shows a list of unused triggers over multiple sessions.

Usage:

show unused triggers   --> Shows unused triggers
clear unused triggers  --> Clears counts from previous client sessions
  
]]>
</description>

</plugin>


<!--  Aliases  -->

<aliases>
  <alias
   match="show unused triggers"
   enabled="y"
   sequence="100"
   script="ShowUnusedTriggers"
  >
  </alias>
  
  <alias
   match="clear unused triggers"
   enabled="y"
   sequence="100"
   script="ClearUnusedTriggers"
  >
  </alias>
    
</aliases>

<script>
<![CDATA[

require "serialize"  -- needed to serialize table to string

trigger_counts = trigger_counts or {}  -- ensure table exists, if not loaded from variable

-- on plugin install, convert variable into Lua table
function OnPluginInstall ()
  assert (loadstring (GetVariable ("trigger_counts") or "")) ()
end -- function OnPluginInstall

-- on saving state, convert Lua table back into string variable
function OnPluginSaveState ()
  
  -- add the counts from last session to the ones for this session
  local new_counts = { }
  
  local plugins = GetPluginList() or {}
  table.insert (plugins, "") -- add main world to plugins list
  
  for _, pluginID in pairs (plugins) do 

    local tl = GetPluginTriggerList(pluginID) or {}
    for id, name in ipairs (tl) do 
       local matchText = GetPluginTriggerInfo (pluginID, name, 1)
       local count = GetPluginTriggerInfo (pluginID, name, 21) + (trigger_counts [matchText] or 0)
       new_counts [matchText] = count
    end  -- for
    
  end -- of each plugin

  -- save the updated counts
  SetVariable ("trigger_counts", 
               "trigger_counts = " .. serialize.save_simple (new_counts))
end -- function OnPluginSaveState


function ShowUnusedTriggers (name, line, wildcards)

  local plugins = GetPluginList() or {}
  table.insert (plugins, "") -- add main world to plugins list
  local counter = 0
  
  for _, pluginID in pairs (plugins) do 
    local tl = GetPluginTriggerList (pluginID) or {}
    local pluginName = "main world file"
    if pluginID ~= "" then
       pluginName = GetPluginInfo (pluginID, 1)
    end -- of not main world file
    for id, name in ipairs (tl) do 
       local matchText = GetPluginTriggerInfo (pluginID, name, 1)
       local count = GetPluginTriggerInfo (pluginID, name, 21) + (trigger_counts [matchText] or 0)
       if count == 0 then
         ColourNote ("green", "", string.format ("Trigger '%s' in %s has not been used. Match text: ", name, pluginName))
         ColourNote ("darkgray",  "", "  " .. matchText)
         counter = counter + 1
       end -- if
    end  -- for
    
  end -- of each plugin
  ColourNote ("orange", "", string.format ("%d unused triggers found.", counter))
end -- ShowUnusedTriggers

function ClearUnusedTriggers (name, line, wildcards)
  trigger_counts = { }  -- no previous counts
  ColourNote ("orange", "", "Trigger counts from previous sessions cleared")
end -- ClearUnusedTriggers

]]>
</script>

</muclient>

Trigger '*trigger1102' in ATCP_Mapper has not been used. Match text: 
  There's water ahead of you. You'll have to * to make it through.
Trigger '*trigger1104' in ATCP_Mapper has not been used. Match text: 
  You'll have to swim to make it through the water in that direction.
Trigger '*trigger1106' in ATCP_Mapper has not been used. Match text: 
  ^There is a door in the way
Trigger '*trigger1108' in ATCP_Mapper has not been used. Match text: 
  Now now\, don\'t be so hasty\!$
Trigger '*trigger1110' in ATCP_Mapper has not been used. Match text: 
  ^You cannot walk through
Trigger '*trigger1112' in ATCP_Mapper has not been used. Match text: 
  As you stroll in, you feel your feet slipping on something slimy.
Trigger '*trigger1114' in ATCP_Mapper has not been used. Match text: 
  The door is locked.
Trigger '*trigger1116' in ATCP_Mapper has not been used. Match text: 
  You are regaining balance and are unable to move.
Trigger '*trigger1118' in ATCP_Mapper has not been used. Match text: 
  You are surrounded by a pocket of air and so must move normally through water.
Trigger '*trigger1120' in ATCP_Mapper has not been used. Match text: 
  You fumble about drunkenly.
Trigger '*trigger1122' in ATCP_Mapper has not been used. Match text: 
  You are asleep and can do nothing. WAKE will attempt to wake you.
Trigger '*trigger1124' in ATCP_Mapper has not been used. Match text: 
  You must be standing first.
Trigger '*trigger1126' in ATCP_Mapper has not been used. Match text: 
  You need to use a boat, fly, or swim underwater to go there.
Trigger '*trigger1128' in ATCP_Mapper has not been used. Match text: 
  You can't * while sitting.
Trigger '*trigger1130' in ATCP_Mapper has not been used. Match text: 
  ^You dream about 
Trigger '*trigger1132' in ATCP_Mapper has not been used. Match text: 
  There is no exit in that direction.
Trigger '*trigger1134' in ATCP_Mapper has not been used. Match text: 
  Alas, you cannot go that way.
Trigger '*trigger924' in main world file has not been used. Match text: 
  hello
18 unused triggers found.