Module:Automatic archive navigator/sandbox

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< Module:Automatic archive navigator
Revision as of 03:54, 5 October 2014 by blackwiki>Mr. Stradivarius (use tabs for indentation)
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Documentation for this module may be created at Module:Automatic archive navigator/sandbox/doc

--
-- This module implements {{Automatic archive navigator}}
--

local p = {}

local args
local frame
local thisPage

-- Get a formatted link to the subpage a certain distance away, or nil
-- if that subpage does not exist. e.g. If the current subpage is
-- /Archive 27, then getSubpageLink(3) returns a link to Archive 30.
local function getSubpageLink(offset)
	local subpageName
	local startIdx, endIdx, archiveNum = mw.ustring.find(thisPage.subpageText, '^Archive ([0-9]+)')
	if archiveNum then
		subpageName = 'Archive ' .. (archiveNum + offset)
	elseif tonumber(thisPage.subpageText) then
		subpageName = thisPage.subpageText + offset
	else
		return nil  -- Couldn't parse out a subpage number
	end

	local page = mw.title.new(thisPage.baseText .. '/' .. subpageName, thisPage.namespace)
	if page.exists then
		return '[[../' .. subpageName .. '|' .. subpageName .. ']]'
	else
		return nil
	end
end

local function getLinksText()
	local arrowSpacer = '&nbsp;&nbsp;'
	local linkSpacer = '&nbsp;&nbsp;&nbsp;&nbsp;'
	if mw.ustring.len(thisPage.subpageText) <= 4 then
		-- If page names are short, we want more space. But why the mix of regular, non-breaking, and em spaces?
		local emSpace = frame:expandTemplate({title = 'Unicode', args = {mw.ustring.char(8195)}})
		arrowSpacer = '&nbsp; ' .. emSpace .. ' &nbsp;&nbsp;'
		linkSpacer = '&nbsp; ' .. emSpace .. ' &nbsp; ' .. emSpace .. '&nbsp;'
	end

	local s = ''

	for offset = -5, -3 do
		local link = getSubpageLink(offset)
		if link then
			if offset == -3 then
				s = s .. link .. linkSpacer
			else
				s = s .. link .. ' ←' .. arrowSpacer
			end
			break
		end
	end

	for offset = -2, -1 do
		local link = getSubpageLink(offset)
		if link then
			s = s .. link .. linkSpacer
		end
	end

	s = s .. '<span style="font-size:115%;">[[' .. thisPage.fullText .. '|' .. thisPage.subpageText .. ']]</span>'

	for offset = 1, 2 do
		local link = getSubpageLink(offset)
		if link then
			s = s .. linkSpacer .. link
		end
	end

	for offset = 5, 3, -1 do
		local link = getSubpageLink(offset)
		if link then
			if offset == 3 then
				s = s .. linkSpacer .. link
			else
				s = s .. arrowSpacer .. '→ ' .. link
			end
			break
		end
	end

	return s
end

local function getMessage()
	if args[1] == '1' then
		return ''
	else
		local msg = '----\n'
		if args.text then
			msg = msg .. args.text
		else
			msg = msg .. "This is an '''[[Help:Archiving a talk page|archive]]''' of past discussions"
			if args.period then
				msg = msg .. "&#32;for the period '''" .. args.period .. "'''"
			end
			msg = msg .. ". '''Do not edit the contents of this page.''' If you wish to start a new discussion or revive an old one, please do so on the "
			msg = msg .. "[[" .. thisPage.rootPageTitle.fullText .. "|current talk page]]."
		end
		return msg
	end
end

local function _aan()
	frame = mw.getCurrentFrame()

	-- For testing purposes, allow passing in the page name as a param.
	if args.title then
		thisPage = mw.title.new(args.title)
	else
		thisPage = mw.title.getCurrentTitle()
	end

	local image = args.image
	if not image then
		image = '[[File:' .. (args.icon or 'Replacement filing cabinet.svg') .. '|40x40px|alt=|link=]]'
	end

	local mbox = frame:expandTemplate({title = 'tmbox', args = {
		image = image,
		imageright = args.imageright,
		style = args.style or 'width:80%;margin-left:auto;margin-right:auto;',
		textstyle = args.textstyle or 'text-align:center;',
		text = getLinksText() .. '\n' .. getMessage()
	}})

	return mbox .. '__NONEWSECTIONLINK__ __NOEDITSECTION__'
end

function p.aan(frame)
	local origArgs
	-- If called via #invoke, use the args passed into the invoking template.
	-- Otherwise, for testing purposes, assume args are being passed directly in.
	if frame == mw.getCurrentFrame() then
		origArgs = frame:getParent().args
	else
		origArgs = frame
	end

	-- ParserFunctions considers the empty string to be false, so to preserve the previous 
	-- template behavior, change any empty arguments to nil, so Lua will consider
	-- them false too.
	args = {}
	for k, v in pairs(origArgs) do
		if v ~= '' then
			args[k] = v
		end
	end

	return _aan()
end

return p