async/README.md

extended_api
===========

extended_api mod is a library pack.
It adds two new node events and contains async functions.

Usage Async
===========
1. create a async instance.
```lua
async = extended_api.Async()
```
2. set the priority of the async pool to high.
```lua
async.priority(50, 500)
```
3. iterate from 1 to 50 and log the value i.
```lua
async.iterate(1, 50, function(i)
	minetest.log(i)
end)
```
4. run throught each element in a table.
```lua
local array = {"start", "text2", "text3", "text4", "text5", "end"}
async.foreach(array, function(k,v)
	minetest.log(v)
end)
```
5. async do while loop.
```lua
local c = 50
async.do_while(function() return c>0 end, function()
	minetest.log(c)
	c = c - 1
end)
```
6. register a async globalstep. this one spams the chat with the word spam.
```lua
async.register_globalstep(function(dtime) 
	minetest.chat_send_all("spam")
end)
```
7. chain task runs a group of functions from a table.
```lua
async.chain_task({
	function(args)
		args.count = 1
		minetest.log(args.count)
		return args
	end,
	function(args)
		args.count = args.count + 1
		minetest.log(args.count)
		return args
end})
```
8. adds a single function to the task queue. This is a sort of waiting list.
```lua
async.queue_task(function() 
	minetest.log("Hello World!")
end)
```
9. Same as queue_task but the task does not go into a queue.
```lua
async.single_task(function() 
	minetest.log("Hello World!")
end)
```
New Node Events
===========
1. this covers both functions. I made this for a way to awake node timers without abms.
```lua
minetest.register_node("default:stone", {
	description = "Stone",
	tiles = {"default_stone.png"},
	groups = {cracky = 3, stone = 1},
	drop = 'default:cobble',
	legacy_mineral = true,
	sounds = default.node_sound_stone_defaults(),
	on_construct_node_near_by = function(pos,other_pos,name)
		if name == "tnt:tnt" then
			minetest.chat_send_all("Do not place tnt near me thank you!")
		end
	end,
	on_destruct_node_near_by = function(pos,other_pos,name)
		if name == "default:dirt" then
			minetest.chat_send_all("I hate dirt too!")
		end
	end,
})
```
New Registers
===========
1. register_playerloop iterates through all players online.
```lua
extended_api.register_playerloop(function(dtime, _, player) 
	-- Empty
end)
```
2. register_step excutes the given function in one minetest globalstep.
```lua
extended_api.register_step(function(dtime)
	minetest.chat_send_all("spam")
end)
```
3. functions on_wield and on_wield_switch happen when a player wields a item.
```lua
extended_api.register_on_wield("default:torch", function(item, itemname, player)
	minetest.chat_send_all("You are wielding " .. itemname) 
end)
extended_api.register_on_wield_switch("default:torch", function(item, itemname, player)
	minetest.chat_send_all("You un-wielded " .. itemname)
end)
```