Delete system.lua

fluid/system.lua

@@ -1,169 +0,0 @@
-local PATH = (...):gsub('%.[^%.]+$', '')
-
-local Component = require(PATH..".component")
-local Pool      = require(PATH..".pool")
-
-local System = {}
-System.mt    = {
-   __index = System,
-   __call  = function(systemProto, ...)
-      local system = setmetatable({
-         __all      = {},
-         __pools    = {},
-         __instance = nil,
-      }, systemProto)
-
-      for _, filter in pairs(systemProto.__filter) do
-         local pool = system:__buildPool(filter)
-         if not system[pool.name] then
-            system[pool.name]                   = pool
-            system.__pools[#system.__pools + 1] = pool
-         else
-            error("Pool with name '"..pool.name.."' already exists.")
-         end
-      end
-
-      system:init(...)
-      return system
-   end,
-}
-
---- Creates a new System prototype.
--- @param ... Variable amounts of filters
--- @return A new System prototype
-function System.new(...)
-   local systemProto = setmetatable({
-      __filter = {...},
-   }, System.mt)
-   systemProto.__index = systemProto
-
-   return systemProto
-end
-
---- Default initialization function.
--- @param ... Varags
-function System:init(...)
-end
-
---- Builds a Pool for the System.
--- @param baseFilter The 'raw' Filter
--- @return A new Pool
-function System:__buildPool(baseFilter)
-   local name   = "pool"
-   local filter = {}
-
-   for i, v in ipairs(baseFilter) do
-      if type(v) == "table" then
-         filter[#filter + 1] = v
-      elseif type(v) == "string" then
-         name = v
-      end
-   end
-
-   return Pool(name, filter)
-end
-
---- Checks and applies an Entity to the System's pools.
--- @param e The Entity to check
--- @return True if the Entity was added, false if it was removed. Nil if nothing happend
-function System:__check(e)
-   local systemHas = self:__has(e)
-
-   for _, pool in ipairs(self.__pools) do
-      local poolHas  = pool:has(e)
-      local eligible = pool:eligible(e)
-
-      if not poolHas and eligible then
-         pool:add(e)
-         self:entityAddedTo(e, pool)
-         self:__tryAdd(e)
-
-         return true
-      elseif poolHas and not eligible then
-         pool:remove(e)
-         self:entityRemovedFrom(e, pool)
-         self:__tryRemove(e)
-
-         return false
-      end
-   end
-end
-
---- Removed an Entity from the System.
--- @param e The Entity to remove
-function System:__remove(e)
-   if self:__has(e) then
-      for _, pool in ipairs(self.__pools) do
-         if pool:has(e) then
-            pool:remove(e)
-            self:entityRemovedFrom(e, pool)
-         end
-      end
-
-      self.__all[e] = nil
-      self:entityRemoved(e)
-   end
-end
-
---- Tries to add an Entity to the System.
--- @param e The Entity to add
-function System:__tryAdd(e)
-   if not self:__has(e) then
-      self.__all[e] = 0
-      self:entityAdded(e)
-   end
-
-   self.__all[e] = self.__all[e] + 1
-end
-
---- Tries to remove an Entity from the System.
--- @param e The Entity to remove
-function System:__tryRemove(e)
-   if self:__has(e) then
-      self.__all[e] = self.__all[e] - 1
-
-      if self.__all[e] == 0 then
-         self.__all[e] = nil
-         self:entityRemoved(e)
-      end
-   end
-end
-
---- Returns the Instance the System is in.
--- @return The Instance
-function System:getInstance()
-   return self.__instance
-end
-
---- Returns if the System has the Entity.
--- @param The Entity to check for
--- @return True if the System has the Entity. False otherwise
-function System:__has(e)
-   return self.__all[e] and true
-end
-
---- Default callback for adding an Entity.
--- @param e The Entity that was added
-function System:entityAdded(e)
-end
-
---- Default callback for adding an Entity to a pool.
--- @param e The Entity that was added
--- @param pool The pool the Entity was added to
-function System:entityAddedTo(e, pool)
-end
-
---- Default callback for removing an Entity.
--- @param e The Entity that was removed
-function System:entityRemoved(e)
-end
-
---- Default callback for removing an Entity from a pool.
--- @param e The Entity that was removed
--- @param pool The pool the Entity was removed from
-function System:entityRemovedFrom(e, pool)
-end
-
-return setmetatable(System, {
-   __call = function(_, ...) return System.new(...) end,
-})