This Lua module is used on approximately 9,200 pages and changes may be widely noticed. Test changes in the module's /sandbox or /testcases subpages, or in your own module sandbox. Consider discussing changes on the talk page before implementing them.

This module is rated as ready for general use. It has reached a mature state, is considered relatively stable and bug-free, and may be used wherever appropriate. It can be mentioned on help pages and other Wikipedia resources as an option for new users. To minimise server load and avoid disruptive output, improvements should be developed through sandbox testing rather than repeated trial-and-error editing.

WLink – Module with functions for strings in context of wikilinks and external links (URL). This module was imported from de:Module:WLink.

All functions expect exactly one unnamed parameter (which should be provided to get a meaningful answer). Whitespace ahead and after content is ignored. HTML Entities would not disturb syntax and might be resolved. The parameter might contain single or double bracketed links which would be extracted if appropriate.

The return value is an empty string (“nothing”), if the parameter value does not fulfil the expectations. If there is a result or the query condition is true, at least one visible character will be returned. The result does not begin or end with a space.

ansiPercent

Convert string by ANSI encoding rather than UTF-8 encoding

Required for some 20^th century servers

Optional parameter space – encoding of spaces:

• space=+ – common for query components
• space=_ – as for Wikis
• Default: %20

formatURL

Create bracketed link, if not yet, from URL or domain

• [http://example.org/about Homepage] yields [http://example.org/about Homepage]
• http://example.org/about yields [http://example.org/about example.org/about]
• example.org yields [http://example.org/ example.org]

getArticleBase

Retrieve generic page title, no fragment nor brackets

Use current page title, if omitted.

getBaseTitle

Retrieve last segment in subpage, no fragment

getExtension

Retrieve media extension

Result is downcased (without leading dot).

getFile

Retrieve media page identifier

getFragment

Retrieve original (not decoded) fragment string after #

getLanguage

Retrieve language identifier

getNamespace

Retrieve namespace number

getPlain

Retrieve text with all links replaced by link titles

getProject

Retrieve project identifier within wikifarm (recommendable brief notation)

getTarget

Retrieve first target (wikilink or URL)

getTargetPage

Retrieve first target page (page name or URL of page)

Same as getTarget if no fragment.

getTitle

Retrieve first link title (wikilink or URL), or wikilink target

isBracketedLink

Does attempt match a bracketed link?

isBracketedURL

Does attempt match a bracketed URL?

isCategorization

Does attempt match a categorization?

isExternalLink

Does attempt match an external link?

isInterlanguage

Does attempt match an interlanguage link?

isInterwiki

Does attempt match an interwiki link?

isMedia

Does attempt match a media translusion?

isTitledLink

Does attempt match a titled link?

isValidLink

Does attempt match a link?

isWeblink

Does attempt match an external link?

isWikilink

Does attempt match a wikilink?

failsafe

Version ID: 2016-10-05

optional parameter 1 – required version

result: empty, if requirement not met

A test page illustrates practical use.

All functions described above can be used by other modules:

local lucky, WLink = pcall( require, "Module:WLink" )
if type( WLink ) == "table" then
    WLink = WLink.WLink()
else
    -- failure; WLink is the error message
    return "<span class=\"error\">" .. WLink .. "</span>"
end

Subsequently there are available:

• WLink.ansiPercent(story, space)
• WLink.formatURL()
• WLink.getArticleBase()
• WLink.getBaseTitle()
• WLink.getExtension()
• WLink.getFile()
• WLink.getFragment()

  false, if not found; but empty string if empty fragment.

  No leading # in result.

• WLink.getLanguage()
• WLink.getNamespace()
• WLink.getPlain()
• WLink.getProject()
• WLink.getTarget()
• WLink.getTargetPage()
• WLink.getTitle()
• WLink.isBracketedLink()
• WLink.isBracketedURL()
• WLink.isCategorization()
• WLink.isExternalLink()
• WLink.isInterlanguage()
• WLink.isInterwiki()
• WLink.isMedia()
• WLink.isTitledLink()
• WLink.isValidLink()
• WLink.isWeblink()
• WLink.isWikilink()
• WLink.wikilink()

  Yields table with wikilink components, else false.

  Components might be, if provided:

  • lead – leading colon : present and required, if true
  • project – project interwiki within wikifarm (recommendable brief notation)
  • lang – known language version (downcased)
  • ns – number of namespace
  • space – local canonical name of namespace
  • title – page title as provided; at least empty string

• WLink.failsafe(atleast)

  1. atleast
     optional
     nil or required version

  returns: string or false

If succeeding, the WLink.get*() return a string, the WLink.is*() true (if no exception mentioned); on failure always false.