Make class with methods in it?

[sanyisasha]

Hi. Somehow possible to make a custom class (like Vehicle) and add custom function to it (e.g. Vehicle:create(...))
I want to create a class based system, where i make base classes (e.g User), then make custom functions (e.g User:setMoney(100))
My main problem is, as i saw in mta it's not possible to export function as variable/element data value. I don't want to make it like: exports.resource:User_setMoney(UserClass, 100), but it should called like before, User:setMoney(100), because that's why i want to make the system: make mta programing easier with a cool framework (Like in PHP -> Yii2, Laravel)

Any possibility to make it work? 

Thanks,
SaSha

[Mr.Loki]

Simple class template:

-- Create Class
local Class = {}
Class.__index = Class

function Class.new()
    local self = setmetatable({ },Class)
    return self
end
setmetatable(Class, {__call = function( _,... ) return Class.new(...) end })

-- Add method to class
function Class:doStuff(stuff)
    self.var = stuff
end

 

[sanyisasha]

That's okey. But!
If i'll send this to another script, i'll get 'error': Class:doStuff value will equal to nill!
That's my problem, not the OOP

[Saml1er]

You can use: https://raw.githubusercontent.com/LuaDist/classlib/master/unclasslib.lua

The usage is pretty simple. In this example, NamedAccount class inherits methods from Account class, it works because it supports multiple inheritance. If you don't want to inherit from other classes ,you should call class().

Account = class()
function Account:__init(initial)  -- constructor
	self.balance = initial or 0
end
function Account:deposit(amount)
	self.balance = self.balance + amount
end

function Account:getBalance()
	return self.balance
end


myAccount = Account(10.00)

NamedAccount = class(Account)
function NamedAccount:__init(name, initial)
	self[Account]:__init(initial)
	self.name = name or 'anonymous'
end

function NamedAccount:getName()
	return self.name
end

myNamedAccount = NamedAccount('John', 10.00)

myNamedAccount:deposit(60)

outputChatBox ("Balance: "..tostring ( myNamedAccount:getBalance() ).." | Name: "..myNamedAccount:getName())

 

Edited September 1, 2018 by Saml1er

[Tails]

@sanyisasha, check out bakagaijin: http://anirudh.katoch.me/project/bakagaijin/

I think this is as close you will get to interacting with other scripts in an object oriented way.

I've used it before in one of my projects and it worked pretty well.

Edited September 1, 2018 by Tails

[Simple0x47]

If you want to create a gamemode full OOP, don't try it due to lack of optimization in the methods used for the creation of the OOP style. Better take C++ and write as much as possible with it for the server side.

[sanyisasha]

15 hours ago, Saml1er said:

You can use: https://raw.githubusercontent.com/LuaDist/classlib/master/unclasslib.lua

The usage is pretty simple. In this example, NamedAccount class inherits methods from Account class, it works because it supports multiple inheritance. If you don't want to inherit from other classes ,you should call class().

Account = class()
function Account:__init(initial)  -- constructor
	self.balance = initial or 0
end
function Account:deposit(amount)
	self.balance = self.balance + amount
end

function Account:getBalance()
	return self.balance
end


myAccount = Account(10.00)

NamedAccount = class(Account)
function NamedAccount:__init(name, initial)
	self[Account]:__init(initial)
	self.name = name or 'anonymous'
end

function NamedAccount:getName()
	return self.name
end

myNamedAccount = NamedAccount('John', 10.00)

myNamedAccount:deposit(60)

outputChatBox ("Balance: "..tostring ( myNamedAccount:getBalance() ).." | Name: "..myNamedAccount:getName())

 

That's okey. But. How i'll separate these in two lua files?
Example:
models/user.s.lua <-- Create class named User
app.s.lua <-- instantiates User class from models/user.s.lua

My solution was every model had a function called get<ModelName>Model, what return the needed class.
It worked well, if i had a User.name, i was able to print it.
But if i tryed to call User.setname(newname), it writed the setname function is nill.

[sanyisasha]

I found a not best, but looks like working solution.
I made a bridge shared file. Created a shared variable: Class_test
 

-- user.s.lua
test = class()
function test:__init(initial)  -- constructor
	self.balance = initial or 0
end
function test:deposit(amount)
	self.balance = self.balance + amount
end

function test:getBalance()
	return self.balance
end


Class_test = test

In user.s.lua, in the last row writed this: Class_test = test
In app.s.lua, writed this: local t = Class_test(10)
Then: outputDebugString(t:getBalance()) <- in console: 10.

Thanks everyone!!

[Saml1er]

can you post the PHP equivalent code in OOP? I can show you how you can convert it to Lua. @sanyisasha

 

[sanyisasha]

On 02/09/2018 at 22:25, Saml1er said:

can you post the PHP equivalent code in OOP? I can show you how you can convert it to Lua. @sanyisasha

 

Not that's the problem. Simple:

//xy.php
Class test extends test2 {
	public $var;

	public function __construct($varVal) {
		$this->var = $varVal;
	}
}

//yx.php somewhere else
require 'xy.php';
$testClass = new test(1);
echo $testClass->var;

Btw my final solution: Own package manager 

<!-- meta.raw.xml | Package manager generate meta.xml from this -->
<test>
	<info author="SaSha" />
	<package name="utils" />
	<package name="user" />
	<script src="test.lua" type="client" />
</test>

<!-- Generated meta.xml -->
<test>
    <info author="SaSha"></info>
    <script src="packages/utils/unclasslib.class.lua" version="1.0" type="shared"></script>
    <file src="packages/user/assets/24.jpg"></file>
    <script src="packages/user/User.class.lua" version="0.0.1" type="shared"></script>
    <script type="client" src="test.lua"></script>
</test>

And i can access int test.lua what for example User.class.lua contains.
That's good because when i write a resource, for example a loginpanel, simple write needed packages in the meta.raw.xml and in the server: /package test install, and the package manager generate meta.xml, copy scripts, folders and everytihing or if it's exists, replace it with the new one. (Later with version check)

 

 

Edited October 3, 2018 by sanyisasha