Difference between revisions of "Module:Category handler"
From Game Detectives Wiki
(add support for "categories=no" and "category2=¬") |
(better fallback behaviour if we are over the expensive function count) |
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---------------------------------------------------------------------- | ---------------------------------------------------------------------- | ||
− | -- Get | + | -- Get [[Module:Namespace detect]] and declare the table of functions |
− | + | -- that we will return. | |
local NamespaceDetect = require('Module:Namespace detect') | local NamespaceDetect = require('Module:Namespace detect') | ||
local p = {} | local p = {} | ||
Line 116: | Line 116: | ||
-- Find whether we need to return a category or not. | -- Find whether we need to return a category or not. | ||
local function needsCategory( pageObject, args ) | local function needsCategory( pageObject, args ) | ||
− | -- | + | -- Don't categorise if the relevant options are set. |
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
if args[cfg.nocat] == cfg.nocatTrue | if args[cfg.nocat] == cfg.nocatTrue | ||
or args[cfg.categories] == cfg.categoriesNo | or args[cfg.categories] == cfg.categoriesNo | ||
Line 129: | Line 122: | ||
and args[cfg.category2] ~= cfg.category2Yes | and args[cfg.category2] ~= cfg.category2Yes | ||
and args[cfg.category2] ~= cfg.category2Negative ) | and args[cfg.category2] ~= cfg.category2Negative ) | ||
− | or | + | then |
− | + | return false | |
+ | end | ||
+ | -- If there is no pageObject available, then that either means that we are over | ||
+ | -- the expensive function limit or that the title specified was invalid. Invalid | ||
+ | -- titles will probably only be a problem during testing, so we choose the best | ||
+ | -- fallback for being over the expensive function limit. The fallback behaviour | ||
+ | -- of the old template was to assume the page was not a subpage, so we will do | ||
+ | -- the same here. | ||
+ | if args[cfg.subpage] == cfg.subpageNo and pageObject and pageObject.isSubpage then | ||
+ | return false | ||
+ | end | ||
+ | if args[cfg.subpage] == cfg.subpageOnly | ||
+ | and (not pageObject or (pageObject and not pageObject.isSubpage) ) then | ||
return false | return false | ||
− | |||
− | |||
end | end | ||
+ | return true | ||
end | end | ||
Revision as of 13:16, 1 July 2013
Documentation for this module may be created at Module:Category handler/doc
---------------------------------------------------------------------- -- -- -- CATEGORY HANDLER -- -- -- -- This module implements the {{category handler}} template -- -- in Lua, with a few improvements: all namespaces and all -- -- namespace aliases are supported, and namespace names are -- -- detected automatically for the local wiki. This module -- -- requires [[Module:Namespace detect]] to be available on -- -- the local wiki. It can be configured for different wikis -- -- by altering the values in the "cfg" table. -- -- -- ---------------------------------------------------------------------- ---------------------------------------------------------------------- -- Configuration data -- -- Language-specific parameter names and values can be set -- -- here. -- ---------------------------------------------------------------------- local cfg = {} -- cfg.nocat is the parameter name to suppress categorisation. -- cfg.nocatTrue is the value to suppress categorisation, and -- cfg.nocatFalse is the value to both categorise and to skip the -- blacklist check. cfg.nocat = 'nocat' cfg.nocatTrue = 'true' cfg.nocatFalse = 'false' -- The parameter name for the legacy "categories" parameter. This -- skips the blacklist if set to the cfg.category2Yes value, and -- suppresses categorisation if set to the cfg.categoriesNo value. cfg.categories = 'categories' cfg.categoriesYes = 'yes' cfg.categoriesNo = 'no' -- The parameter name for the legacy "category2" parameter. This -- skips the blacklist if set to the cfg.category2Yes value, and -- suppresses categorisation if present but equal to anything other -- than cfg.category2Yes or cfg.category2Negative. cfg.category2 = 'category2' cfg.category2Yes = 'yes' cfg.category2Negative = '¬' -- cfg.subpage is the parameter name to specify how to behave on -- subpages. cfg.subpageNo is the value to specify to not -- categorise on subpages; cfg.only is the value to specify to only -- categorise on subpages. cfg.subpage = 'subpage' cfg.subpageNo = 'no' cfg.subpageOnly = 'only' -- The parameter for data to return in all namespaces. cfg.all = 'all' -- The parameter name for data to return if no data is specified for -- the namespace that is detected. This must be the same as the -- cfg.other parameter in [[Module:Namespace detect]]. cfg.other = 'other' -- The parameter name used to specify a page other than the current -- page; used for testing and demonstration. This must be the same -- as the cfg.page parameter in [[Module:Namespace detect]]. cfg.page = 'page' -- The categorisation blacklist. Pages that match Lua patterns in this -- list will not be categorised unless any of the following options are -- set: "nocat=false", "categories=yes", or "category2=yes". -- If the namespace name has a space in, it must be written with an -- underscore, e.g. "Wikipedia_talk". Other parts of the title can have -- either underscores or spaces. cfg.blacklist = { '^Main Page$', -- don't categorise the main page. -- Don't categorise the following pages or their subpages. '^Wikipedia:Cascade%-protected items$', '^Wikipedia:Cascade%-protected items/.*$', '^User:UBX$', -- The userbox "template" space. '^User:UBX/.*$', '^User_talk:UBX$', '^User_talk:UBX/.*$', -- Don't categorise subpages of these pages, but allow -- categorisation of the base page. '^Wikipedia:Template messages/.*$', '/[aA]rchive' -- Don't categorise archives. } -- This is a table of namespaces to categorise by default. They -- should be in the format of parameter names accepted by -- [[Module:Namespace detect]]. cfg.defaultNamespaces = { 'main', 'file', 'help', 'category' } ---------------------------------------------------------------------- -- End configuration data -- ---------------------------------------------------------------------- -- Get [[Module:Namespace detect]] and declare the table of functions -- that we will return. local NamespaceDetect = require('Module:Namespace detect') local p = {} ---------------------------------------------------------------------- -- Local functions -- -- The following are internal functions, which we do not want -- -- to be accessible from other modules. -- ---------------------------------------------------------------------- -- Find whether we need to return a category or not. local function needsCategory( pageObject, args ) -- Don't categorise if the relevant options are set. if args[cfg.nocat] == cfg.nocatTrue or args[cfg.categories] == cfg.categoriesNo or ( args[cfg.category2] and args[cfg.category2] ~= cfg.category2Yes and args[cfg.category2] ~= cfg.category2Negative ) then return false end -- If there is no pageObject available, then that either means that we are over -- the expensive function limit or that the title specified was invalid. Invalid -- titles will probably only be a problem during testing, so we choose the best -- fallback for being over the expensive function limit. The fallback behaviour -- of the old template was to assume the page was not a subpage, so we will do -- the same here. if args[cfg.subpage] == cfg.subpageNo and pageObject and pageObject.isSubpage then return false end if args[cfg.subpage] == cfg.subpageOnly and (not pageObject or (pageObject and not pageObject.isSubpage) ) then return false end return true end -- Find whether we need to check the blacklist or not. local function needsBlacklistCheck( args ) if args[cfg.nocat] == cfg.nocatFalse or args[cfg.categories] == cfg.categoriesYes or args[cfg.category2] == cfg.category2Yes then return false else return true end end -- Searches the blacklist to find a match with the page object. The -- string searched is the namespace plus the title, including subpages. -- Returns true if there is a match, otherwise returns false. local function findBlacklistMatch( pageObject ) if not pageObject then return end -- Get the title to check. local title = pageObject.nsText -- Get the namespace. -- Append a colon if the namespace isn't the blank string. if #title > 0 then title = title .. ':' .. pageObject.text else title = pageObject.text end -- Check the blacklist. for i, pattern in ipairs( cfg.blacklist ) do if mw.ustring.match( title, pattern ) then return true end end return false end -- Find whether any namespace parameters have been specified. -- Mappings is the table of parameter mappings taken from -- [[Module:Namespace detect]]. local function nsParamsExist( mappings, args ) if args[cfg.all] or args[cfg.other] then return true end for ns, params in pairs( mappings ) do for i, param in ipairs( params ) do if args[param] then return true end end end return false end -- The main structure of the module. Checks whether we need to categorise, -- and then passes the relevant arguments to [[Module:Namespace detect]]. local function _main( args ) -- Get the page object and argument mappings from -- [[Module:Namespace detect]], to save us from having to rewrite the -- code. local pageObject = NamespaceDetect.getPageObject( args[cfg.page] ) local mappings = NamespaceDetect.getParamMappings() -- Check if we need a category or not, and return nothing if not. if not needsCategory( pageObject, args ) then return end local ret = '' -- The string to return. -- Check blacklist if necessary. if not needsBlacklistCheck( args ) or not findBlacklistMatch( pageObject ) then if not nsParamsExist( mappings, args ) then -- No namespace parameters exist; basic usage. Pass args[1] to -- [[Module:Namespace detect]] using the default namespace -- parameters, and return the result. local ndargs = {} for _, ndarg in ipairs( cfg.defaultNamespaces ) do ndargs[ndarg] = args[1] end ndargs.page = args.page local ndresult = NamespaceDetect.main( ndargs ) if ndresult then ret = ret .. ndresult end else -- Namespace parameters exist; advanced usage. -- If the all parameter is specified, return it. if args.all then ret = ret .. args.all end -- Get the arguments to pass to [[Module:Namespace detect]]. local ndargs = {} for ns, params in pairs( mappings ) do for _, param in ipairs( params ) do ndargs[param] = args[param] or args[cfg.other] or nil end end if args.other then ndargs.other = args.other end if args.page then ndargs.page = args.page end local data = NamespaceDetect.main( ndargs ) -- Work out what to return based on the result of the namespace -- detect call. local datanum = tonumber( data ) if type( datanum ) == 'number' then -- "data" is a number, so return that positional parameter. -- Remove non-positive integer values, as only positive integers -- from 1-10 were used with the old template. if datanum > 0 and math.floor( datanum ) == datanum and args[datanum] then ret = ret .. args[ datanum ] end else -- "data" is not a number, so return it as it is. if type(data) == 'string' then ret = ret .. data end end end end return ret end ---------------------------------------------------------------------- -- Global functions -- -- The following functions are global, because we want them -- -- to be accessible from #invoke and from other Lua modules. -- -- At the moment only the main function is here. It processes -- -- the arguments and passes them to the _main function. -- ---------------------------------------------------------------------- function p.main( frame ) -- If called via #invoke, use the args passed into the invoking -- template, or the args passed to #invoke if any exist. Otherwise -- assume args are being passed directly in. local origArgs if frame == mw.getCurrentFrame() then origArgs = frame:getParent().args for k, v in pairs( frame.args ) do origArgs = frame.args break end else origArgs = frame end -- Trim whitespace and remove blank arguments for the following args: -- 1, 2, 3 etc., "nocat", "categories", "subpage", and "page". local args = {} for k, v in pairs( origArgs ) do v = mw.text.trim(v) -- Trim whitespace. if type(k) == 'number' or k == cfg.nocat or k == cfg.categories or k == cfg.subpage or k == cfg.page then if v ~= '' then args[k] = v end else args[k] = v end end -- Lower-case "nocat", "categories", "category2", and "subpage". These -- parameters are put in lower case whenever they appear in the old -- template, so we can just do it once here and save ourselves some work. local lowercase = { cfg.nocat, cfg.categories, cfg.category2, cfg.subpage } for _, v in ipairs( lowercase ) do if args[v] then args[v] = mw.ustring.lower( args[v] ) end end return _main( args ) end return p