Mô đun:Excerpt

-- Module:Excerpt implements the Excerpt template
-- Documentation and master version: https://en.wikipedia.org/wiki/Module:Excerpt
-- Authors: User:Sophivorus, User:Certes, User:Aidan9382 & others
-- License: CC-BY-SA-3.0
local Transcluder = require( 'Module:Transcluder' )
local yesno = require( 'Module:Yesno' )
local ok, config = pcall( require, 'Module:Excerpt/config' )
if not ok then config = {} end
local p = {}
-- Helper function to get arguments
local args
local function getArg( key, default )
	local value = args key 
	if value and mw.text.trim( value ) ~=  then
		return value
	end
	return default
end
-- Helper function to handle errors
local function getError( message, value )
	if type( message ) == 'string' then
		message = Transcluder.getError( message, value )
	end
	if config.categories and config.categories.errors and mw.title.getCurrentTitle().isContentPage then
		message:node(  )
	end
	return message
end
-- Helper function to get localized messages
local function getMessage( key )
	local ok, TNT = pcall( require, 'Module:TNT' )
	if not ok then return key end
	return TNT.format( 'I18n/Module:Excerpt.tab', key )
end
-- Main entry point for templates
function p.main( frame )
	args = Transcluder.parseArgs( frame )
	-- Make sure the requested page exists
	local page = getArg( 1 )
	if not page or page ==  then return getError( 'no-page' ) end
	local title = mw.title.new(page)
	if not title then return getError( 'invalid-title', page ) end
	if title.isRedirect then title = title.redirectTarget end
	if not title.exists then return getError( 'page-not-found', page ) end
	page = title.prefixedText
	-- Set variables from the template parameters
	local section = getArg( 2, mw.ustring.match( getArg( 1 ), '^#+#(.+)' ) )
	local hat = yesno( getArg( 'hat', true ) )
	local edit = yesno( getArg( 'edit', true ) )
	local this = getArg( 'this' )
	local only = getArg( 'only' )
	local files = getArg( 'files', getArg( 'file', ( only == 'file' and 1 ) ) )
	local lists = getArg( 'lists', getArg( 'list', ( only == 'list' and 1 ) ) )
	local tables = getArg( 'tables', getArg( 'table', ( only == 'table' and 1 ) ) )
	local templates = getArg( 'templates', getArg( 'template', ( only == 'template' and 1 ) ) )
	local paragraphs = getArg( 'paragraphs', getArg( 'paragraph', ( only == 'paragraph' and 1 ) ) )
	local references = getArg( 'references' )
	local subsections = not yesno( getArg( 'subsections' ) )
	local noLinks = not yesno( getArg( 'links', true ) )
	local noBold = not yesno( getArg( 'bold' ) )
	local onlyFreeFiles = yesno( getArg( 'onlyfreefiles', true ) )
	local briefDates = yesno( getArg( 'briefdates', false ) )
	local inline = yesno( getArg( 'inline' ) )
	local quote = yesno( getArg( 'quote' ) )
	local more = yesno( getArg( 'more' ) )
	local class = getArg( 'class' )
	local displaytitle = getArg( 'displaytitle' ) or page
	-- Build the hatnote
	if hat and not inline then
		if this then
			hat = this
		elseif quote then
			hat = getMessage( 'this' )
		elseif only then
			hat = getMessage( only )
		else
			hat = getMessage( 'section' )
		end
		hat = hat .. ' ' .. getMessage( 'excerpt' ) .. ' '
		if section then
			hat = hat .. ':' .. page .. '#' .. mw.uri.anchorEncode( section ) .. '|' .. displaytitle
				.. ' § ' .. mw.ustring.gsub( section, '%%(^|+)|?^*%%', '%1' ) .. '.' -- remove nested links
		else
			hat = hat ..  .. displaytitle .. '.'
		end
		if edit then
			hat = hat .. 
			hat = hat .. title:fullUrl( 'action=edit' ) .. ' ' .. mw.message.new( 'editsection' ):plain()
			hat = hat .. 
		end
		if config.hat then
			hat = config.hat .. hat .. '}}'
			hat = frame:preprocess( hat )
		else
			hat = mw.html.create( 'div' ):addClass( 'dablink excerpt-hat' ):wikitext( hat )
		end
	else
		hat = nil
	end
	-- Build the "Read more" link
	if more and not inline then
		more = "" .. getMessage( 'more' ) .. ""
		more = mw.html.create( 'div' ):addClass( 'noprint excerpt-more' ):wikitext( more )
	else
		more = nil
	end
	-- Build the options for Module:Transcluder out of the template parameters and the desired defaults
	local options = {
		files = files,
		lists = lists,
		tables = tables,
		paragraphs = paragraphs,
		sections = subsections,
		categories = 0,
		references = references,
		only = only and mw.text.trim( only, 's' ) .. 's',
		noLinks = noLinks,
		noBold = noBold,
		noSelfLinks = true,
		noNonFreeFiles = onlyFreeFiles,
		noBehaviorSwitches = true,
		fixReferences = true,
		linkBold = true,
	}
	-- Get the excerpt itself
	local title = page .. '#' .. ( section or  )
	local ok, excerpt = pcall( Transcluder.get, title, options )
	if not ok then return getError( excerpt ) end
	if mw.text.trim( excerpt ) ==  and not only then
		if section then return getError( 'section-empty', section ) else return getError( 'lead-empty' ) end
	end
	-- Fix birth and death dates, but only in the first paragraph
	if briefDates then
		local startpos = 1 -- skip initial templates
		local s
		local e = 0
		repeat
			startpos = e + 1
			s, e = mw.ustring.find( excerpt, "%s*%b{}%s*", startpos )
		until not s or s > startpos
		s, e = mw.ustring.find( excerpt, "%b()", startpos ) -- get (...), which may be (year–year)
		if s and s  y1 and y2 < y1 + 125 and y1 <= tonumber( os.date( "%Y" )) then
					excerpt = mw.ustring.sub( excerpt, 1, s ) .. year1 .. "–" .. year2 .. mw.ustring.sub( excerpt, e )
				end
			end
		end
	end
	-- If no file was found, try to get one from the infobox
	local fileNamespaces = Transcluder.getNamespaces( 'File' )
	if ( ( only == 'file' or only == 'files' ) or ( not only and ( files ~= '0' or not files ) ) ) and -- caller asked for files
		not Transcluder.matchAny( excerpt, '%%', fileNamespaces, ':' ) and -- and there are no files in Transcluder's output
		config.captions -- and we have the config option required to try finding files in templates
	then
		-- We cannot distinguish the infobox from the other templates so we search them all
		local infobox = Transcluder.getTemplates( excerpt );
		infobox = table.concat( infobox )
		local parameters = Transcluder.getParameters( infobox )
		local file, captions, caption
		for _, pair in pairs( config.captions ) do
			file = pair1
			file = parametersfile
			if file and Transcluder.matchAny( file, '^.*%.', { 'JjPpEe?Gg', 'PpNnGg', 'GgIiFf', 'SsVvGg' }, '.*' ) then
				file = mw.ustring.match( file, '%?%?.-:(+)%?%?' ) or file -- File:Example.jpgupright=1.5 to Example.jpg
				captions = pair2
				for _, p in pairs( captions ) do
					if parameters p  then caption = parameters p  break end
				end
				excerpt =  .. ( caption or  ) ..  .. excerpt
				if ( onlyFreeFiles ) then
					excerpt = Transcluder.removeNonFreeFiles( excerpt )
				end
				break
			end
		end
	end
	-- Unlike other elements, templates are filtered here
	-- because we had to search the infoboxes for files
	local trash
	if only and ( only == 'template' or only == 'templates' ) then
		trash, excerpt = Transcluder.getTemplates( excerpt, templates );
	else -- Remove blacklisted templates
		local blacklist = config.blacklist and table.concat( config.blacklist, ',' ) or 
		if templates then
			if string.sub( templates, 1, 1 ) == '-' then --Unwanted templates. Append to blacklist
				blacklist = templates .. ',' .. blacklist
			else --Wanted templates. Replaces blacklist and acts as whitelist
				blacklist = templates
			end
		else
			blacklist = '-' .. blacklist
		end
		trash, excerpt = Transcluder.getTemplates( excerpt, blacklist );
	end
	-- Remove extra line breaks but leave one before and after so the parser interprets lists, tables, etc. correctly
	excerpt = mw.text.trim( excerpt )
	excerpt = string.gsub( excerpt, '\n\n\n+', '\n\n' )
	excerpt = '\n' .. excerpt .. '\n'
	-- Remove nested categories
	excerpt = frame:preprocess( excerpt )
	local categories, excerpt = Transcluder.getCategories( excerpt, options.categories )
	-- Add tracking categories
	if config.categories then
		local contentCategory = config.categories.content
		if contentCategory and mw.title.getCurrentTitle().isContentPage then
			excerpt = excerpt .. 
		end
		local namespaceCategory = config.categories mw.title.getCurrentTitle().namespace 
		if namespaceCategory then
			excerpt = excerpt .. 
		end
	end
	-- Load the styles
	local styles
	if config.styles then
		styles = frame:extensionTag( 'templatestyles', , { src = config.styles } )
	end
	-- Combine and return the elements
	if inline then
		return mw.text.trim( excerpt )
	end
	local tag = 'div'
	if quote then
		tag = 'blockquote'
	end
	excerpt = mw.html.create( 'div' ):addClass( 'excerpt' ):wikitext( excerpt )
	local block = mw.html.create( tag ):addClass( 'excerpt-block' ):addClass( class )
	return block:node( styles ):node( hat ):node( excerpt ):node( more )
end
-- Entry points for backwards compatibility
function p.lead( frame ) return p.main( frame ) end
function p.excerpt( frame ) return p.main( frame ) end
return p