Module:Pagetype

--                                                                           -- --                                PAGETYPE                                    -- --                                                                           -- --      This is a meta-module intended to replace  and similar    -- --     templates. It automatically detects namespaces, and allows for a     -- --     great deal of customisation. It can easily be ported to other        -- --     wikis by changing the values in the Module:Pagetype/config. -- --                                                                           --

-- Load config. local cfg = mw.loadData('Module:Pagetype/config')

-- Load required modules. local getArgs = require('Module:Arguments').getArgs local yesno = require('Module:Yesno') local nsDetectModule = require('Module:Namespace detect') local nsDetect = nsDetectModule._main local getParamMappings = nsDetectModule.getParamMappings local getPageObject = nsDetectModule.getPageObject

local p = {}

local function shallowCopy(t) -- Makes a shallow copy of a table. local ret = {} for k, v in pairs(t) do		ret[k] = v	end return ret end

local function checkPagetypeInput(namespace, val) -- Checks to see whether we need the default value for the given namespace, -- and if so gets it from the pagetypes table. -- The yesno function returns true/false for "yes", "no", etc., and returns -- val for other input. local ret = yesno(val, val) if ret and type(ret) ~= 'string' then ret = cfg.pagetypes[namespace] end return ret end

local function getPagetypeFromClass(class, param, aliasTable, default) -- Gets the pagetype from a class specified from the first positional -- parameter. param = yesno(param, param) if param ~= false then -- No check if specifically disallowed. for _, alias in ipairs(aliasTable) do			if class == alias then if type(param) == 'string' then return param else return default end end end end end

local function getNsDetectValue(args) -- Builds the arguments to pass to Module:Namespace detect and returns -- the result.

-- Get the default values. local ndArgs = {} local defaultns = args[cfg.defaultns] if defaultns == cfg.defaultnsAll then ndArgs = shallowCopy(cfg.pagetypes) else local defaultnsArray if defaultns == cfg.defaultnsExtended then defaultnsArray = cfg.extendedNamespaces elseif defaultns == cfg.defaultnsNone then defaultnsArray = {} else defaultnsArray = cfg.defaultNamespaces end for _, namespace in ipairs(defaultnsArray) do			ndArgs[namespace] = cfg.pagetypes[namespace] end end

--	-- Add custom values passed in from the arguments. These overwrite the	-- defaults. The possible argument names are fetched from	-- Module:Namespace detect automatically in case new namespaces are	-- added. Although we accept namespace aliases as parameters, we only pass	-- the local namespace name as a parameter to Module:Namespace detect.	-- This means that the "image" parameter can overwrite defaults for the	-- File: namespace, which wouldn't work if we passed the parameters through	-- separately.	-- local mappings = getParamMappings for ns, paramAliases in pairs(mappings) do		-- Copy the aliases table, as # doesn't work with tables returned from -- mw.loadData. paramAliases = shallowCopy(paramAliases) local paramName = paramAliases[1] -- Iterate backwards along the array so that any values for the local -- namespace names overwrite those for namespace aliases. for i = #paramAliases, 1, -1 do			local paramAlias = paramAliases[i] local ndArg = checkPagetypeInput(paramAlias, args[paramAlias]) if ndArg == false then -- If any arguments are false, convert them to nil to protect -- against breakage by future changes to -- Module:Namespace detect. ndArgs[paramName] = nil elseif ndArg then ndArgs[paramName] = ndArg end end end -- Check for disambiguation-class and N/A-class pages in mainspace. if ndArgs.main then local class = args[1] if type(class) == 'string' then -- Put in lower case so e.g. "Dab" and "dab" will both match. class = mw.ustring.lower(class) end local dab = getPagetypeFromClass(			class,			args[cfg.dab],			cfg.dabAliases,			cfg.dabDefault		) if dab then ndArgs.main = dab else local na = getPagetypeFromClass(				class,				args[cfg.na],				cfg.naAliases,				cfg.naDefault			) if na then ndArgs.main = na			end end end -- If there is no talk value specified, use the corresponding subject -- namespace for talk pages. if not ndArgs.talk then ndArgs.subjectns = true end -- Add the fallback value. This can also be customised, but it cannot be -- disabled. local other = args[cfg.other] -- We will ignore true/false/nil results from yesno here, but using it -- anyway for consistency. other = yesno(other, other) if type(other) == 'string' then ndArgs.other = other else ndArgs.other = cfg.otherDefault end -- Allow custom page values. ndArgs.page = args.page return nsDetect(ndArgs) end

local function detectRedirects(args) local redirect = args[cfg.redirect] -- The yesno function returns true/false for "yes", "no", etc., and returns -- redirect for other input. redirect = yesno(redirect, redirect) if redirect == false then -- Detect redirects unless they have been explicitly disallowed with -- "redirect=no" or similar. return end local pageObject = getPageObject(args.page) -- If we are using subject namespaces elsewhere, do so here as well. if pageObject and not yesno(args.talk, true) and args[cfg.defaultns] ~= cfg.defaultnsAll then pageObject = getPageObject(			pageObject.subjectNsText .. ':' .. pageObject.text		) end -- Allow custom values for redirects. if pageObject and pageObject.isRedirect then if type(redirect) == 'string' then return redirect else return cfg.redirectDefault end end end

function p._main(args) local redirect = detectRedirects(args) if redirect then return redirect else return getNsDetectValue(args) end end

function p.main(frame) local args = getArgs(frame) return p._main(args) end

return p