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Module:Header

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Documentation for this module may be created at Module:Header/doc 

--[=[
This is a module to implement logic for [[Template:Header]] and [[Template:Translation header]]

TODO:
- centuries are defined as starting on XX01, but WS categorizes them as starting on XX00
-- check whether that's a considered policy choice
]=]

require('strict')

local p = {} --p stands for package

local yesno = require('Module:Yesno')
local getArgs = require('Module:Arguments').getArgs
local tableTools = require('Module:TableTools')
local ISO_639_language_name = require('Module:ISO 639').language_name
local parent_links = require('Module:Auto parents')._parent_links

local construct_header = require('Module:Header structure').construct_header
local headerAttributions = require('Module:Header/attribution')
local construct_defaultsort = require('Module:Header/sort')._construct_defaultsort
local construct_year = require('Module:Header/year').construct_year

local current_title = mw.title.getCurrentTitle()

--[=[
Wrap stylesheet in noexport div
]=]
local function get_noexport_stylesheet(template)
	return tostring(mw.html.create('div'):addClass('ws-noexport'):wikitext(mw.getCurrentFrame():extensionTag('templatestyles', '', {src = template .. '/styles.css'})))
end

--[=[
Get badge if any
]=]
local function badge()
	return require('Module:Edition').badge({args = {category = '1', indicator = '1'}})
end

--[=[
Construct the [[Help:Microformat]] for the page.

This is in the form:
<div id="ws-data" ...>
  <span id="ws-title">Title here...</span>
  ...
<div>
]=]
local function construct_microformat(args)
	local mf_div =  mw.html.create('div')
		:addClass('ws-noexport')
		:attr('id', 'ws-data')
		:css({speak = 'none'})
	
	-- override to show the microformat
	if yesno(args['show-microformat']) then
		mf_div:addClass('ws-data-show')
	end
	
	-- collect the MF values here
	local mf = {};

	mf['ws-article-id'] = current_title.id 
	
	-- add the title
	if args['title'] then
		mf['ws-title'] = args['title']

		-- append section if there is one
		if args['section'] then
			mf['ws-title'] = mf['ws-title'] .. " — " .. args['section']
		end
	end
	
	local author = args['override-section-author'] or args['section-author'] or args['override-author'] or args['author']
	if author then
		mf['ws-author'] = author
	end
	
	local translator = args['override-translator'] or args['translator']
	if translator then
		mf['ws-translator'] = translator
	end
	
	local year = args['year']
	if year then
		mf['ws-year'] = year
	end
	
	if args['cover'] then
		mf['ws-cover'] = args['cover']	
	end
	
	for k, v in pairs(mf) do
		mf_div:tag('span'):attr('id', k):wikitext(v)
	end
	
	return tostring(mf_div)
end

--[=[
Detect explicit formatting in fields like "section" and "title"
]=]
local function explicit_formatting(str)
	return string.match(str, "'''?")
		or string.match(str, "<%s*/?%s*[iIbB]%s*>")
		-- add more cases here or come up with a less silly way to do things
end

local function check_non_existent_author_pages(args, param, categories)
	if args[param] then
		-- some pages expect an invalid author
		local lower_arg = string.lower(args[param])
		local attr_data = headerAttributions.attr_data[param] or headerAttributions.attr_data[string.gsub(param, 'section-', '')]
		if not attr_data or not attr_data['special_cases'][lower_arg] then
			local target = mw.title.makeTitle("Author", args[param])
			-- expensive function!
			if not target or not target.exists then
				table.insert(categories, "Works with non-existent author pages")
			end
		end
	end
end

--[=[
Construct the automatic categories for the header
]=]
local function construct_categories(args)
	local categories = {}
	
	if args['override-author'] then
		table.insert(categories, "Pages with override author")
	end
	
	if current_title:inNamespaces(0) or args.testing then
		check_non_existent_author_pages(args, 'author', categories)
		check_non_existent_author_pages(args, 'editor', categories)
		check_non_existent_author_pages(args, 'translator', categories)
		check_non_existent_author_pages(args, 'section-translator', categories)
		check_non_existent_author_pages(args, 'section-author', categories)
	end
	
	if args['section-author'] then
		table.insert(categories, 'Pages with contributor')
	end
	if args['override-section-author'] then
		table.insert(categories, 'Pages with override contributor')
	end
	
	local author = args['override-author'] or args['author']
	if author and (string.lower(author) == 'unknown') then
		if args.template_name == 'Translation header' then
			table.insert(categories, 'Translations of anonymous works')
		else
			table.insert(categories, "Anonymous texts")
		end
	end
	
	local editor = args['override-editor'] or args['editor']
	if editor then
		editor = string.lower(editor)
		if editor == 'unknown' or editor == '?' then
			table.insert(categories, "Works with unknown editors")
		elseif editor == 'not mentioned' then
			table.insert(categories, "Works with unmentioned editors")
		end
	end
	
	local translator = args['override-translator'] or args['translator']
	if translator then
		translator = string.lower(translator)
		if translator == 'unknown' or translator == 'not mentioned' or translator == '?' then
			table.insert(categories, 'Translations without translator information specified')
		end
	end
	
	if args["shortcut"] then
		table.insert(categories, 'Pages with shortcuts')
	end
	
	if args['noyear'] then
		table.insert(categories, "Pages with noyear")
	end
	if yesno(args['noyearcat']) then
		table.insert(categories, "Pages with noyearcat")
	end
	
	if args['cover'] then
		table.insert(categories, "Pages with an export cover")
	end
	
	-- sanity/maintenance checks on various parameters
	
	-- allow_explicit_formatting parameter suppresses this check
	-- used by, for example, [[Template:Versions]]
	if not yesno(args['allow-explicit-formatting']) then
		if args['title'] and explicit_formatting(args['title']) then
			table.insert(categories, "Pages with explicit formatting in header fields")
		end
		if args['section'] and explicit_formatting(args['section']) then
			table.insert(categories, "Pages with explicit formatting in header fields")
		end
	end
	
	-- translation header categories
	if args.template_name == 'Translation header' then
		if args.language then
			table.insert(categories, 'Works originally in ' .. (args.language_name or 'an undefined language'))
		else
			table.insert(categories, 'Wikisource translations with no original language')
		end
		
		if not args.original then
			table.insert(categories, 'Wikisource translations with no original source')
		end
		
		if not current_title.isSubpage then
			table.insert(categories, 'Wikisource translations')
		end
	end

	local category_links = {}
	for k, v in pairs(categories) do
		table.insert(category_links, '[[Category:' .. v .. ']]')
	end
	return table.concat(category_links)
end

--[=[
Check for numerical parameters (which shouldn't be used)
]=]
local function check_for_numerical_arguments(args)
	for k, v in pairs(args) do
		if type(k) == 'number' then
			return '[[Category:' .. 'Headers with numerical arguments' .. ']]'
		end
	end
	return ''
end

--[=[
Add categories from the categories parameter
]=]

local function manual_categories(args)
	if not args.categories then
		return ''
	end
	
	-- Replace each string that ends in a slash with a category definition.
	-- This does include the final one because we're adding a slash to the input string.
	local categories = mw.ustring.gsub(args.categories .. '/', '([^/]+)/*', '[[Category:%1]]')
	
	return '[[Category:' .. 'Works using categories parameter' .. ']]' .. categories
end

--[=[
Categorize subpages
]=]
local function check_subpages()
	local title = current_title
	local parent_exists = false
	while title.isSubpage and not parent_exists do
		title = mw.title.new(title.baseText, title.nsText)
		parent_exists = title.exists
	end
	if parent_exists and title:inNamespaces(0) then
		return '[[Category:' .. 'Subpages' .. ']]'
	elseif parent_exists then
		return '[[Category:' .. title.nsText .. ' subpages' .. ']]'
	else
		return ''
	end
end

--[=[
Assemble the title
]=]
local function header_title(args)
	local title = args.title or ''
	local titleSpan = tostring(mw.html.create('span'):attr('id', 'header-title-text'):wikitext(title))
	
	local year = construct_year(args)
	local attr = headerAttributions.construct_attributions(args)
	local section = headerAttributions.construct_section(args)
	
	if attr ~= '' and title ~= '' then
		attr = '<br id=\"header-title=break\" />' .. attr
	end
	
	return table.concat({titleSpan, year, attr, section})
end

--[=[
[[Template:Header]]
]=]
function p._header(args, argsWithBlanks)
	argsWithBlanks = argsWithBlanks or args
	
	-- aliases
	local dup_cat = ''
	local newArgs = {}
	
	for k, v in pairs(args) do
		local newkey = string.lower(string.gsub(string.gsub(tostring(k), '_', '-'), ' ', '-'))
		if newkey ~= tostring(k) then
			if argsWithBlanks[newkey] then
				dup_cat = '[[Category:' .. 'Pages using duplicate arguments in template calls' .. ']]'
			end
			if not args[newkey] then
				newArgs[newkey] = newArgs[newkey] or v
			end
		end
	end
	for k, v in pairs(newArgs) do
		args[k] = v
		argsWithBlanks[k] = v
	end
	
	newArgs = {}
	local aliases = {
		['section-author'] = 'contributor',
		['section-translator'] = 'contributing%-translator'
	}
	for arg, alias in pairs(aliases) do
		for k, v in pairs(args) do
			local newkey = string.gsub(k, alias, arg)
			if newkey ~= tostring(k) then
				if argsWithBlanks[newkey] then
					dup_cat = '[[Category:' .. 'Pages using duplicate arguments in template calls' .. ']]'
				end
				if not args[newkey] then
					newArgs[newkey] = v
				end
			end
		end
	end
	for k, v in pairs(newArgs) do
		args[k] = v
		argsWithBlanks[k] = v
	end
	
	args.sortkey = args.defaultsort or args.sortkey
	
	-- add aliases to argsWithBlanks
	for k, v in pairs(args) do
		if not argsWithBlanks[k] then
			argsWithBlanks[k] = v
		end
	end
	
	-- default values
	args.template_name = args.template_name or 'Header'
	args.testing = yesno(args.testing or current_title.fullText == 'Template:Header/testcases' or current_title.fullText == 'Template:Translation header/testcases')
	
	-- default values for title and section (allow override by setting to blank)
	if not argsWithBlanks['title'] then
		args['title'] = parent_links({})
		argsWithBlanks['title'] = args['title']
	end
	if not argsWithBlanks['section'] and current_title.isSubpage then
		args['section'] = current_title.subpageText
		argsWithBlanks['section'] = args['section']
	end
	
	-- header args
	
	args.pre_container = badge()
	args.header_class = 'wst-header ws-header ws-noexport noprint dynlayout-exempt ' .. (args.header_class or '')
	args.main_class = 'headertemplate'
	args.notes_id = args.notes_id or 'navigationNotes'
	
	-- title
	args.main_title = header_title(args)
	
	-- FIXME: just use Wikidata instead of interwiki links?
	local interwiki = ''
	if args.template_name == 'Translation header' and args.language then
		interwiki = tostring(mw.html.create('span'):addClass('interwiki-info'):attr('id', args.language):attr('title', '(original)'))
		if args.original and (args.language == 'ang' or args.language == 'enm' or args.language == 'sco') then
			-- cycle to mul.ws and back around to en.ws
			interwiki = interwiki .. '[[' .. args.language .. ':en:' .. args.original .. ']]'
		elseif args.original and args.language and args.language_name then
			-- general interwiki link
			interwiki = interwiki .. '[[' .. args.language .. ':' .. args.original .. ']]'
		end
	end
	
	-- defaultsort tracking categories
	args.equalsortcat = '[[Category:' .. 'Headers with DefaultSort equal to page title' .. ']]'
	args.diffsortcat = '[[Category:' .. 'Headers applying DefaultSort key' .. ']]'
	
	args.post_notes = table.concat({
		construct_microformat(args),
		check_subpages(),
		manual_categories(args),
		construct_categories(args),
		check_for_numerical_arguments(argsWithBlanks),
		construct_defaultsort(args),
		dup_cat,
		interwiki
	})
	
	return get_noexport_stylesheet('Header') .. construct_header(args)
end

function p.header(frame)
	return p._header(
		getArgs(frame),
		getArgs(frame, {removeBlanks = false})
	)
end

--[=[
[[Template:Translation header]]
]=]
function p._translation_header(args, argsWithBlanks)
	argsWithBlanks = argsWithBlanks or args
	
	args.header_class = 'wst-translation-header'
	args.template_name = 'Translation header'
	args.main_id = 'translationheadertemplate'
	args.notes_id = 'translation-notes'
	args.notes_class = 'header-notes'
	if args.language then
		args.language_name = ISO_639_language_name(args.language)
	end
	
	return get_noexport_stylesheet('Translation header') .. p._header(args, argsWithBlanks)
end

function p.translation_header(frame)
	return p._translation_header(
		getArgs(frame),
		getArgs(frame, {removeBlanks = false})
	)
end

return p
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