Module:Excerpt

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 function getArg(key, default) value = args[key] if value and mw.text.trim(value) ~= '' then return value end return default end

-- Helper function to handle errors 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 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

function p.main(frame) args = Transcluder.parseArgs(frame)

-- Make sure the requested page exists local page = getArg(1) or getArg('article') if not page then return getError('no-page') end local title = mw.title.new(page) if not title then return getError('no-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 local fragment = getArg('fragment') local section = fragment or getArg(2, getArg('section', mw.ustring.match(getArg(1) or getArg('article'), '[^#]+#([^#]+)') ) ) 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', getArg('reference', ( only == 'reference' and 1 ) ) ) local sections = not yesno( getArg('sections') ) local noBold = not yesno( getArg('bold') ) local inline = yesno( getArg('inline') ) local quote = yesno( getArg('quote') ) local more = yesno( getArg('more') ) local class = getArg('class') local blacklist = table.concat((config.templates or {}), ',')

-- 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 and not fragment then hat = hat .. '' .. page				.. ' § ' .. mw.ustring.gsub(section, '%[%[([^]|]+)|?[^*%]%]', '%1') .. ']]' -- remove nested links else hat = hat ..  .. page ..  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) end hat = mw.html.create('div'):addClass('dablink excerpt-hat'):wikitext(hat) 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 arguments and the desired defaults local options = { files = files, lists = lists, tables = tables, paragraphs = paragraphs, templates = templates or '-' .. blacklist, sections = sections, categories = 0, references = references, only = only and mw.text.trim(only, 's') .. 's', noBold = noBold, noSelfLinks = true, noNonFreeFiles = true, 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

-- Add a line break in case the excerpt starts with a table or list excerpt = '\n' .. excerpt

-- If no file was found, try to excerpt one from the removed infoboxes 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 local templates = Transcluder.get(title, { only = 'templates', templates = blacklist, fixReferences = true } ) local parameters = Transcluder.getParameters(templates) local file, captions, caption for _, pair in pairs(config.captions) do			file = pair[1] file = parameters[file] if file and Transcluder.matchAny(file, '^.*%.', {'[Jj][Pp][Ee]?[Gg]','[Pp][Nn][Gg]','[Gg][Ii][Ff]','[Ss][Vv][Gg]'}, '.*') then file = mw.ustring.match(file, '%[?%[?.-:([^{|]+)%]?%]?') or file -- Example.jpg to Example.jpg captions = pair[2] for _, p in pairs(captions) do					if parameters[p] then caption = parameters[p] break end end excerpt =  .. file ..  .. excerpt excerpt = Transcluder.removeNonFreeFiles(excerpt) break end end end

-- 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 local tag1 = 'div' local tag2 = 'div' if inline then tag1 = 'span' tag2 = 'span' elseif quote then tag2 = 'blockquote' end excerpt = mw.html.create(tag1):addClass('excerpt'):wikitext(excerpt) local block = mw.html.create(tag2):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