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--[[
-- This module produces a "See also: a, b and c" link. It implements the
-- template {{see also}}.
--]]
 
local mHatnote = require('Module:Hatnote')
local mTableTools -- lazily initialise
local mArguments -- lazily initialise
 
local p = {}
 
function p.seealso(frame)
	mTableTools = require('Module:TableTools')
	mArguments = require('Module:Arguments')
	local args = mArguments.getArgs(frame, {parentOnly = true})
	local pages = {}
	for k, v in pairs(args) do
		if type(k) == 'number' then
			local numstring = tostring(k)
			local display = args['label ' .. numstring]
				or args['l' .. numstring]
			local page = {v, display}
			pages[k] = page
		end
	end
	pages = mTableTools.compressSparseArray(pages)
	if not pages[1] then
		return mHatnote.makeWikitextError(
			'no page names specified',
			'Template:See also#Errors',
			args.category
		)
	end
	local options = {
		altphrase = args.altphrase,
		selfref = args.selfref
	}
	return p._seealso(options, unpack(pages))
end
 
function p._seealso(options, ...)
	local altphrase = options and options.altphrase or 'See also'
	local links = mHatnote.formatPageTables(...)
	links = mw.text.listToText(links)
	local text = altphrase .. ': ' .. links
 
	-- Pass options through.
	local hnOptions = {}
	hnOptions.selfref = options.selfref
	hnOptions.extraclasses = 'boilerplate seealso'
 
	return mHatnote._hatnote(text, hnOptions)
end
 
return p

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