Extending plugins

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

<!DOCTYPE muclient [
   <!ENTITY show_vnums "true" >
   <!ENTITY show_timing "false" >
   <!ENTITY show_completed "true" >
   <!ENTITY show_database_mods "false" >
   <!ENTITY show_other_areas "false" >
   <!ENTITY show_up_down "false" >
   <!ENTITY speedwalk_prefix "run" >
]>

<muclient>
<plugin
   name="Alternative_Mapper"
   author="Multiple"
   id="83fdb6092b08fb95e4f85a2f"
   language="Lua"
   purpose="Allows you to modify the Aardwolf mapper"
   save_state="y"
   date_written="2019-11-29 07:01:18"
   requires="4.73"
   version="1.0"
   >
<description trim="y">
<![CDATA[
AUTOMATIC MAPPER by Fiendish
** This is a very improved GMCP version of the original ATCP mapper by Nick Gammon.
** Some GMCP specific code added by Lasher.
** A few features contributed by Spartacus.
** Many major improvements made to the original design by Fiendish.
]]>
</description>
</plugin>

<script>
local show_vnums = &show_vnums;
local show_timing = &show_timing;
local show_completed = &show_completed;
local show_database_mods = &show_database_mods;
local show_other_areas = &show_other_areas;
local show_up_down = &show_up_down;
local speedwalk_prefix = "&speedwalk_prefix;"

<![CDATA[

-- helper import function
function ImportFromPlugin (what)
  local xml = string.match (plugin, string.format ('<%s>.*</%s>', what, what))
  assert (xml, "Could not find the " .. what)
  ImportXML (xml)
  xml = nil -- free memory
end -- ImportFromPlugin

-- read the entire plugin into memory
f = assert (io.open (GetInfo (60) .. "aard_GMCP_mapper.xml", "r"))  -- open it
plugin = f:read ("*a")  -- read all of it
f:close ()  -- close it

-- get the original timers, triggers, aliases
ImportFromPlugin 'timers'
ImportFromPlugin 'triggers'
ImportFromPlugin 'aliases'

-- get the script
script = string.match (plugin, '<script>(.*)</script>')
assert (script, "Could not find the script")
plugin = nil  -- free memory

-- pull out the CDATA stuff from within the script
script = string.match (script, '<!%[CDATA%[(.*)%]%]>')
assert (script, "Could not find the internal script")

-- load the script
assert (loadstring (script)) ()
script = nil -- free memory


-- replace functions here

function map_find (name, line, wildcards)

   local rooms = {}
   local count = 0

   -- find matching rooms using exact match
   local name = wildcards[1]

   if string.sub(wildcards[1],1,1) == "\"" and string.sub(wildcards[1],-1) == "\"" then
      name = string.sub(wildcards[1],2,-2)
   end
   for row in dbnrowsWRAPPER(string.format ("SELECT uid, name FROM rooms WHERE rooms.name = %s", fixsql (name))) do
      table.insert(rooms, {uid=row.uid, reason=true})
      count = count + 1
   end   -- finding room

   -- see if nearby
   mapper.find (name,
      rooms,  -- function
      50,
      show_vnums,  -- show vnum?
      count,      -- how many to expect
      false,       -- don't auto-walk
      nil,
      quick_mode
   )
end -- map_find

]]>
</script> 

</muclient>