craftguide/README.md

# ![Preview1](http://i.imgur.com/fIPNYkb.png) Crafting Guide

#### `craftguide` is the most comprehensive crafting guide on Minetest.
#### Consult the [Minetest Wiki](http://wiki.minetest.net/Crafting_guide) for more details.

This crafting guide is a blue book named *"Crafting Guide"* or a wooden sign.

This crafting guide features a **progressive mode**.
The progressive mode is a Terraria-like system that only shows recipes you can craft
from items you ever had in your inventory. To enable it: `craftguide_progressive_mode = true` in `minetest.conf`.

`craftguide` is also integrated in `sfinv` (Minetest Game inventory). To enable it:
`craftguide_sfinv_only = true` in `minetest.conf`.

Use the command `/craft` to show the recipe(s) of the pointed node.

![Preview2](https://i.imgur.com/bToFH38.png)

---

## API

### Custom recipes

#### Registering a custom crafting type

```Lua
craftguide.register_craft_type("digging", {
	description = "Digging",
	icon = "default_tool_steelpick.png",
})
```

#### Registering a custom crafting recipe

```Lua
craftguide.register_craft({
	type   = "digging",
	width  = 1,
	output = "default:cobble 2",
	items  = {"default:stone"},
})
```

### Recipe filters

Recipe filters can be used to filter the recipes shown to players. Progressive
mode is implemented as a recipe filter.

#### `craftguide.add_recipe_filter(name, function(recipes, player))`

Adds a recipe filter with the given name. The filter function should return the
recipes to be displayed, given the available recipes and an `ObjectRef` to the
user. Each recipe is a table of the form returned by
`minetest.get_craft_recipe`.

Example function to hide recipes for items from a mod called "secretstuff":

```lua
craftguide.add_recipe_filter("Hide secretstuff", function(recipes)
	local filtered = {}
	for _, recipe in ipairs(recipes) do
		if recipe.output:sub(1,12) ~= "secretstuff:" then
			filtered[#filtered + 1] = recipe
		end
	end

	return filtered
end)
```

#### `craftguide.remove_recipe_filter(name)`

Removes the recipe filter with the given name.

#### `craftguide.set_recipe_filter(name, function(recipe, player))`

Removes all recipe filters and adds a new one.

#### `craftguide.get_recipe_filters()`

Returns a map of recipe filters, indexed by name.