Delete instance.lua

fluid/instance.lua

@@ -1,170 +0,0 @@
-local PATH = (...):gsub('%.[^%.]+$', '')
-
-local List = require(PATH..".list")
-
-local Instance = {}
-Instance.__index = Instance
-
---- Creates a new Instance.
--- @return The new instance
-function Instance.new()
-   local instance = setmetatable({
-      entities     = List(),
-      systems      = List(),
-      events       = {},
-      removed      = {},
-   }, Instance)
-
-   return instance
-end
-
---- Adds an Entity to the Instance.
--- @param e The Entity to add
--- @return self
-function Instance:addEntity(e)
-   e.instances:add(self)
-   self.entities:add(e)
-   self:checkEntity(e)
-
-   return self
-end
-
---- Checks an Entity against all the systems in the Instance.
--- @param e The Entity to check
--- @return self
-function Instance:checkEntity(e)
-   for i = 1, self.systems.size do
-      self.systems:get(i):__check(e)
-   end
-
-   return self
-end
-
---- Marks an Entity as removed from the Instance.
--- @param e The Entity to mark
--- @return self
-function Instance:removeEntity(e)
-   self.removed[#self.removed + 1] = e
-
-   return self
-end
-
---- Completely removes all marked Entities in the Instance.
--- @return self
-function Instance:flush()
-   if #self.removed > 0 then
-      for i = 1, #self.removed do
-         local e = self.removed[i]
-
-         e.instances:remove(self)
-         self.entities:remove(e)
-
-         for i = 1, self.systems.size do
-            self.systems:get(i):__remove(e)
-         end
-      end
-
-      self.removed = {}
-   end
-
-   return self
-end
-
---- Adds a System to the Instance.
--- @param system The System to add
--- @param eventName The Event to register to
--- @param callback The function name to call. Defaults to eventName
--- @param enabled If the system is enabled. Defaults to true
--- @return self
-function Instance:addSystem(system, eventName, callback, enabled)
-   if system.__instance and system.__instance ~= self then
-      error("System already in instance '" ..tostring(system.__instance).."'")
-   end
-
-   if not self.systems:has(system) then
-      self.systems:add(system)
-      system.__instance = self
-   end
-
-   if eventName then
-      self.events[eventName] = self.events[eventName] or {}
-
-      local i = #self.events[eventName] + 1
-      self.events[eventName][i] = {
-         system   = system,
-         callback = callback or eventName,
-         enabled  = enabled == nil and true or enabled,
-      }
-   end
-
-   return self
-end
-
---- Enables a System in the Instance.
--- @param system The System to enable
--- @param eventName The Event it was registered to
--- @param callback The callback it was registered with. Defaults to eventName
--- @return self
-function Instance:enableSystem(system, eventName, callback)
-   return self:setSystem(system, eventName, callback, true)
-end
-
---- Disables a System in the Instance.
--- @param system The System to disable
--- @param eventName The Event it was registered to
--- @param callback The callback it was registered with. Defaults to eventName
--- @return self
-function Instance:disableSystem(system, eventName, callback)
-   return self:setSystem(system, eventName, callback, false)
-end
-
---- Sets a System 'enable' in the Instance.
--- @param system The System to set
--- @param eventName The Event it was registered to
--- @param callback The callback it was registered with. Defaults to eventName
--- @param enable The state to set it to
--- @return self
-function Instance:setSystem(system, eventName, callback, enable)
-   callback = callback or eventName
-
-   local listeners = self.events[eventName]
-
-   if listeners then
-      for i = 1, #listeners do
-         local listener = listeners[i]
-
-         if listener.system == system and listener.callback == callback then
-            listener.enabled = enable
-            break
-         end
-      end
-   end
-
-   return self
-end
-
---- Emits an Event in the Instance.
--- @param eventName The Event that should be emitted
--- @param ... Parameters passed to listeners
--- @return self
-function Instance:emit(eventName, ...)
-   self:flush()
-   
-   local listeners = self.events[eventName]
-
-   if listeners then
-      for i = 1, #listeners do
-         local listener = listeners[i]
-
-         if listener.enabled then
-            listener.system[listener.callback](listener.system, ...)
-         end
-      end
-   end
-
-   return self
-end
-
-return setmetatable(Instance, {
-   __call = function(_, ...) return Instance.new(...) end,
-})