areas/api.md
2016-11-28 19:00:01 +08:00

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# API Extension
Adding your protections to the HUD
----------------------------------
If you are providing an extra protection mod to work in conjunction with the
HUD feature of `areas`, you can register a callback to add your mod's code to
display your protection's existence.
Registering a handler:
* `areas.registerHudHandler(handler) --> nil`
Handler specification:
* `handler(pos,area_list) --> new_area_list`
* `pos` - the position at which to check for protection coverage by your mod
* `area_list` - the current list of protected areas
* `new_area_list` - the list of protected areas, updated with your entries
Area list items:
The area list item is a map table identified with an ID, and properties
The ID should be in the format `modname:` and appended with an identifier for the protection.
Each area list item should be a table with the following properties
* `owner` - (required) the name of the protection owner
* `name` - (optional) the name of the area
Example
-------
local myhandler = function(pos,area_list)
local areaowner = find_my_protections(pos)
if areaowner then
arealist["mymodname:first"] = {
name = "Protection name",
owner = areaowner,
}
end
end
areas.register_hud_handler(myhandler)