Post hooks

[marijn211]

Is there any guide about them?

[marijn211]

I looked at the BLT documentation but that was incomplete

[andole]

local original_func = SomeClass.SomeFunc

SomeClass:SomeFunc(args)

   -- Insert your PreHook code here

    original_func(self, args)

    -- Insert your Post hook code here

end

[Luffy]

If you wish to do a PostHook which will be called after the orignal function you can do:

Hooks:PostHook(Class, "function_name", "posthook_name", function(self, [args...])

end)

Same thing with PreHook which is called before the original function, but is called Hooks:PreHook.

I won't recommend doing the above method for people who don't understand lua. If you ever use this method, you have to include '...'. So if overkill adds new arguments your mod won't break anything.

[marijn211]

Ok I will look at it when I can remember stuff better again

[marijn211]

Hooks:PostHook(tweak_data, "MoneyTweakData:init", "Nociv", function(self, self.killing_civilian_deduction = 0)

end)

How could I make this work?
Posting an example is also fine, I learned most programming languages by reading examples (because trial and error is a little hard withouth debugger)

[NewPJzuza]

Originally posted by marijn211:

Hooks:PostHook(tweak_data, "MoneyTweakData:init", "Nociv", function(self, self.killing_civilian_deduction = 0)

end)

How could I make this work?
Posting an example is also fine, I learned most programming langueses by reading examples (because trial and error is a little hard withouth debugger)

I suggested re-read the whole original codes from https://bitbucket.org/TdlQ/payday-2-luajit/src/default/lib/tweak_data/moneytweakdata.lua You will see what's called "Class", and what's just a function's name and what's the variables that are declared from that function since it seems you missed understanding something...

Anyway, It should be....

Hooks:PostHook(MoneyTweakData, "init", "YOU POST HOOK's NAME which I guess it's Nociv", function(self, tweak_data)
self.killing_civilian_deduction = 0
end)

Though your line of codes looks like something nasty...but I hope you have a good intention. Not just making some bad gameplay changing mods.

[marijn211]

Originally posted by Cash.net NewPJzuza:

Originally posted by marijn211:

Hooks:PostHook(tweak_data, "MoneyTweakData:init", "Nociv", function(self, self.killing_civilian_deduction = 0)

end)

How could I make this work?
Posting an example is also fine, I learned most programming langueses by reading examples (because trial and error is a little hard withouth debugger)

I suggested re-read the whole original codes from https://bitbucket.org/TdlQ/payday-2-luajit/src/default/lib/tweak_data/moneytweakdata.lua You will see what's called "Class", and what's just a function's name and what's the variables that are declared from that function since it seems you missed understanding something...

Anyway, It should be....

Hooks:PostHook(MoneyTweakData, "init", "YOU POST HOOK's NAME which I guess it's Nociv", function(self, tweak_data)
self.killing_civilian_deduction = 0
end)

Though your line of codes looks like something nasty...but I hope you have a good intention. Not just making some bad gameplay changing mods.

I just needed an example, the mod was already made withouth the use of posthooks but never uploaded because nobody seemed to want realistic weapon, loot and other values in Payday 2 even if they were balanced

[NewPJzuza]

Originally posted by marijn211:

I just needed an example, the mod was already made but never uploaded because nobody seems to want realistic weapon, loot and other values in Payday 2 even if they are balanced

No need to explain the reason if you know what to do. Anyway when you use a posthook. I suggest you use RequiredScript to check when the function is called and to call it in the proper time. For example

if RequiredScript == "lib/tweak_data/moneytweakdata" then
        Add your posthook here
end

[Luffy]

Originally posted by Cash.net NewPJzuza:

Originally posted by marijn211:

I just needed an example, the mod was already made but never uploaded because nobody seems to want realistic weapon, loot and other values in Payday 2 even if they are balanced

No need to explain the reason if you know what to do. Anyway when you use a posthook. I suggest you use RequiredScript to check when the function is called and to call it in the proper time. For example

if RequiredScript == "lib/tweak_data/moneytweakdata" then
        Add your posthook here
end

This is mostly not required unless you have a few hooked scripts in one file also you can shorten it to

local F = table.remove(RequiredScript:split("/"))
if F == "moneytweakdata" then

elseif F == "otherfile" then

end

Most scripts have a different name so we can use that to just use the file name and not full path.

[marijn211]

I made some script but it only loads the first hook:

if not Network:is_server() then return end
Hooks:PostHook(PlayerManager, "_set_body_bags_amount", "DragnotBag2", function(self)
	self._local_player_body_bags = 0
	managers.hud:on_ext_inventory_changed()
end)
Hooks:PostHook(PlayerManager, "chk_body_bags_depleted", "DragnotBag3", function()
return false
end)
Hooks:PostHook(PlayerManager, "has_max_body_bags", "DragnotBag4", function()
	return true
end)
Hooks:PostHook(PlayerManager, "on_used_body_bag", "DragnotBag5", function()
	self:_set_body_bags_amount(0)
end)

What did I do wrong?
(The other file my mod changes did work)

[andole]

Originally posted by marijn211:

What did I do wrong?

Maybe it does not like functions that simply return a value?
Change returns to something like:
if true then return false end

[marijn211]

Originally posted by andole:

Originally posted by marijn211:

What did I do wrong?

Maybe it does not like functions that simply return a value?
Change returns to something like:
if true then return false end

I will try

[marijn211]

I could now pick up the first body but the second was blocked

[marijn211]

I now have this:

if not Network:is_server() then return end
Hooks:PostHook(PlayerManager, "_set_body_bags_amount", "DragnotBag2", function(self)
	self._local_player_body_bags = 0
	managers.hud:on_ext_inventory_changed()
end)
Hooks:PostHook(PlayerManager, "chk_body_bags_depleted", "DragnotBag3", function()
	return self._local_player_body_bags = 100
end)
Hooks:PostHook(PlayerManager, "has_max_body_bags", "DragnotBag4", function()
	if false then return true
end)
Hooks:PostHook(PlayerManager, "on_used_body_bag", "DragnotBag5", function()
	self:_set_body_bags_amount(0)
end)
Hooks:PostHook(PlayerManager, "total_body_bags", "DragnotBag6", function()
	local bags = self:upgrade_value("player", "corpse_dispose_amount", 1000)
	bags = managers.crime_spree:modify_value("PlayerManager:GetTotalBodyBags", bags)

	return bags
end)

The HUDs use a different number than the game checks so I might set the HUD to 0 and the real to 100

[Sandman332/Docholiday332]

Why would one choose a prehook or a posthook? Lets say the original function has this line.

allow_fire = yes

If I wanted to change this so it was

allow_fire = no

Would you do a prehook or posthook? If I did pre then would the original value be what is used since it is being called after my modified version?

In general I am always a bit confused whether to use a prehook or a posthook. Is there a general rule of thumb or any information?

Thanks!