## API ### Custom tabs #### `i3.new_tab(def)` Custom tabs can be added to the `i3` inventory as follow (example): ```Lua i3.new_tab { name = "stuff", description = "Stuff", image = "image.png", -- Optional, adds an image next to the tab description -- Determine if the tab is visible by a player, `false` or `nil` hide the tab access = function(player, data) local name = player:get_player_name() if name == "singleplayer" then return false end end, formspec = function(player, data, fs) fs("label[3,1;This is just a test]") end, -- Events handling happens here fields = function(player, data, fields) end, } ``` - `player` is an `ObjectRef` to the user. - `data` are the user data. - `fs` is the formspec table which is callable with a metamethod. Each call adds a new entry. #### `i3.set_fs(player[, extra_formspec])` Updates the current formspec. `extra_formspec` adds an additional formspec string. #### `i3.remove_tab(tabname)` Deletes a tab by name. #### `i3.get_current_tab(player)` Returns the current player tab. `player` is an `ObjectRef` to the user. #### `i3.set_tab(player[, tabname])` Sets the current tab by name. `player` is an `ObjectRef` to the user. `tabname` can be omitted to get an empty tab. #### `i3.override_tab(tabname, def)` Overrides a tab by name. `def` is the tab definition like seen in `i3.set_tab`. #### `i3.tabs` A list of registered tabs. --- ### Custom recipes Custom recipes are nonconventional crafts outside the main crafting grid. They can be registered in-game dynamically and have a size beyond 3x3 items. **Note:** the registration format differs from the default registration format in everything. The width is automatically calculated depending where you place the commas. Look at the examples attentively. #### Registering a custom crafting type (example) ```Lua i3.register_craft_type("digging", { description = "Digging", icon = "default_tool_steelpick.png", }) ``` #### Registering a custom crafting recipe (examples) ```Lua i3.register_craft { type = "digging", result = "default:cobble 2", items = {"default:stone"}, } ``` ```Lua i3.register_craft { result = "default:cobble 16", items = { "default:stone, default:stone, default:stone", "default:stone, , default:stone", "default:stone, default:stone, default:stone", } } ``` Recipes can be registered in a Minecraft-like way: ```Lua i3.register_craft { grid = { "X #", " ## ", "X#X#", "X X", }, key = { ['#'] = "default:wood", ['X'] = "default:glass", }, result = "default:mese 3", } ``` Multiples recipes can also be registered: ```Lua i3.register_craft { { result = "default:mese", items = { "default:mese_crystal, default:mese_crystal", "default:mese_crystal, default:mese_crystal", } }, big = { result = "default:mese 4", items = { "default:mese_crystal, default:mese_crystal", "default:mese_crystal, default:mese_crystal", "default:mese_crystal, default:mese_crystal", "default:mese_crystal, default:mese_crystal", } }, } ``` Recipes can be registered from a given URL containing a JSON file (HTTP support is required¹): ```Lua i3.register_craft { url = "https://raw.githubusercontent.com/minetest-mods/i3/main/tests/test_online_recipe.json" } ``` --- ### Recipe filters Recipe filters can be used to filter the recipes shown to players. Progressive mode is implemented as a recipe filter. #### `i3.add_recipe_filter(name, function(recipes, player))` Adds a recipe filter with the given `name`. The filter function returns 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 i3.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) ``` #### `i3.set_recipe_filter(name, function(recipe, player))` Removes all recipe filters and adds a new one. #### `i3.recipe_filters` A map of recipe filters, indexed by name. --- ### Search filters Search filters are used to perform specific searches from the search field. The filters can be cumulated to perform a specific search. They are used like so: ` +=,,<...>` Example usages: - `+groups=cracky,crumbly` -> search for groups `cracky` and `crumbly` in all items. - `wood +groups=flammable` -> search for group `flammable` amongst items which contain `wood` in their names. Notes: - If `optional_name` is omitted, the search filter will apply to all items, without pre-filtering. - The `+groups` filter is currently implemented by default. #### `i3.add_search_filter(name, function(item, values))` Adds a search filter. The search function must return a boolean value (whether the given item should be listed or not). - `name` is the filter name. - `values` is a table of all possible values. Example function sorting items by drawtype: ```lua i3.add_search_filter("types", function(item, drawtypes) local t = {} for i, dt in ipairs(drawtypes) do t[i] = (dt == "node" and reg_nodes[item] and 1) or (dt == "item" and reg_craftitems[item] and 1) or (dt == "tool" and reg_tools[item] and 1) or nil end return #t > 0 end) ``` #### `i3.search_filters` A map of search filters, indexed by name. --- ### Item list compression `i3` can reduce the item list size by compressing a group of items. #### `i3.compress(item, def)` Adds a new group of items to compress. - `item` is the item that serve as stereotype for the group of compressed items. - `def` is a table specifying the substring replace patterns to be used. Example: ```Lua i3.compress("default:diamondblock", { replace = "diamond", by = {"bronze", "copper", "gold", "steel", "tin"} }) ``` #### `i3.compress_groups` A map of all compressed item groups, indexed by stereotypes. --- ### Miscellaneous #### `i3.get_recipes(item)` Returns a table of recipes and usages of `item`. #### `i3.export_url` If set, the mod will export all the cached recipes and usages in a JSON format to the given URL (HTTP support is required¹). #### `groups = {bag = <1-3>}` The `bag` group in the item definition allows to extend the player inventory size given a number between 1 and 3. --- **¹** Add `i3` to the `secure.http_mods` or `secure.trusted_mods` setting in `minetest.conf`.