--[[
    cargBags: An inventory framework addon for World of Warcraft

    Copyright (C) 2010  Constantin "Cargor" Schomburg <xconstruct@gmail.com>

    cargBags is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.

    cargBags is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with cargBags; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

DESCRIPTION
    This file provides some API and database for additions to cargBags.
    They are only used in the layout and more experienced user
    may replace the functions with their own in their implementation.
]]

local _, ns = ...
local cargBags = ns.cargBags
local Implementation = cargBags.classes.Implementation
local Container = cargBags.classes.Container
local ItemButton = cargBags.classes.ItemButton

--[[################################
    Layouts
        Methods for positioning the buttons in a container
##################################]]

Container.layouts = {}

function Container:LayoutButtons(layout, ...)
    return self.layouts[layout](self, ...)
end


--[[################################
    Plugins
        Additional widgets for a bag
##################################]]

cargBags.plugins = {}

function Implementation:SpawnPlugin(name, ...)
    if(cargBags.plugins[name]) then
        local plugin = cargBags.plugins[name](self, ...)
        if(plugin) then
            plugin.parent = self
        end
        return plugin
    end
end
Container.SpawnPlugin = Implementation.SpawnPlugin

function cargBags:RegisterPlugin(name, func)
    cargBags.plugins[name] = func
end


--[[################################
    Sorts
        Sort-functions for your containers
##################################]]

Container.sorts = {}

function Container:SortButtons(arg1)
    table.sort(self.buttons, self.sorts[arg1] or arg1)
end

--[[################################
    Scaffolds
        Templates for ItemButtons
##################################]]

ItemButton.scaffolds = {}

function ItemButton:Scaffold(name, ...)
    return self.scaffolds[name](self, ...)
end

function cargBags:RegisterScaffold(name, func)
    ItemButton.scaffolds[name] = func
end
