blockgame/mods/bg_api/event.lua

local modname = minetest.get_current_modname()

blockgame.events = blockgame.events or {}
local api = blockgame.events



local namespaces = {}

function api.namespace (name)
	if namespaces[name] then return namespaces[name] end
	namespaces[name] = {
		listen = function (...) return api.listen(name, ...) end,
		broadcast = function (...) return api.broadcast(name, ...) end,
		listeners = {},
	}
	return namespaces[name]
end

function api.listen (namespace_name, event, callback)
	local listeners = api.namespace(namespace_name).listeners
	listeners[event] = listeners[event] or {}

	table.insert(listeners[event], {
		event = event,
		callback = callback,
	})
	return #listeners[event]
end

function api.broadcast (namespace_name, event, data)
	if not namespaces[namespace_name] then return end

	local listeners = api.namespace(namespace_name).listeners
	if not listeners[event] then return end

	for _, listener in pairs(listeners[event]) do
		listener.callback(data, event)
	end
end