Module:Labelled list hatnote

--                              Labelled list                                -- --                                                                           -- -- This module does the core work of creating a hatnote composed of a list    -- -- prefixed by a colon-terminated label, i.e. "LABEL: [andList of pages]",   -- -- for and similar templates. --

local mHatnote = require('Module:Hatnote') local mHatlist = require('Module:Hatnote list') local mArguments --initialize lazily local p = {}

-- Defaults global to this module local defaults = { label = 'See also' --Final fallback for label argument }

-- Helper function that pre-combines display parameters into page arguments. -- Also compresses sparse arrays, as a desirable side-effect. function p.preprocessDisplays (args, prefixes) -- Prefixes specify which parameters, in order, to check for display options -- They each have numbers auto-appended, e.g. 'label1', 'label 1', & 'l1' prefixes = prefixes or {'label', 'label ', 'l'} local pages = {} for k, v in pairs(args) do		if type(k) == 'number' then local display for i = 1, #prefixes do display = args[prefixes[i] .. k]				if display then break end end local page = display and string.format('%s|%s', string.gsub(v, '|.*$', ''), display) or v			pages[#pages + 1] = page end end return pages end

-- Produces a labelled pages-list hatnote. -- The main frame (template definition) takes 1 or 2 arguments, for a singular -- and (optionally) plural label respectively: -- * -- The resulting template takes pagename & label parameters normally. function p.labelledList (frame) mArguments = require('Module:Arguments') local labels = {frame.args[1] or defaults.label} labels[2] = frame.args[2] or labels[1] local template = frame:getParent:getTitle local args = mArguments.getArgs(frame, {parentOnly = true}) local pages = p.preprocessDisplays(args) local options = { selfref = args.selfref, category = args.category, template = template }	return p._labelledList(pages, labels, options) end

function p._labelledList (pages, labels, options) labels = labels or {} if #pages == 0 then return mHatnote.makeWikitextError(			'no page names specified',			(options.template or 'Module:Labelled list hatnote') .. '#Errors',			options.category		) end label = (#pages == 1 and labels[1] or labels[2]) or defaults.label local text = string.format('%s: %s', label, mHatlist.andList(pages, true)) local hnOptions = {selfref = options.selfref} return mHatnote._hatnote(text, hnOptions) end

return p