[HELP] Hooking addon

[Zax]

Hello,

I would like to create a small addon that overrides another addon in certain conditions, like that:

-- targetted addon code
function originalFcn(param1, param2)
	print("original addon -"..param1.."-"..param2);
end

When this function is called in the targetted addon, i would like to this code in my addon:

-- my addon code
function myFcn(param1, param2)
	if (myAddon_isOn) then -- my addon settings
		-- hook
		print("myaddon..param1..param2);
		-- do not execute originalFcn() function!
	else
		-- don't do anything, let's the original code run
	end;
end

Is it possible to do such thing? If yes, could you tell me how?

Thanks in advance.

[Dridzt]

If the other addon has their function as a global like in your example yes it's quite possible.

You store a reference to the original function then replace it with your own.
A typical pre-hook scenario.

Addon1

function func1(...)
  -- do stuff
end

Addon2

local orig_func1 = func1
func1 = function myFunc(...)
  if --[[set of conditions]] then
    -- do stuff
  else
    orig_func1(...) -- or let Addon1 do its stuff
  end
end

Edit: Note that if you are the author of both addons or can request changes to either one there's much better ways of getting 2 addons to work together than overwriting each others functionality.

[Zax]

Hello Dridzt, and thank you very much!
Your code works fine