Module:WP
This module depends on the following other modules: |
Implements {{WP}}
local p = {}
local mRedirect = require('Module:Redirect')
-- Return blank text, or an error message if requested
local function err(text)
if errors then error(text, 2) end
return ""
end
-- Get a redirect target (or nil if not a redirect) without using the expensive title object property .isRedirect
local function getRedirectTarget(titleObject)
local content = titleObject:getContent()
if not content then return nil end
return mRedirect.getTargetFromText(content)
end
-- Get a page's content, following redirects, and processing file description pages for files.
-- Also returns the page name, or the target page name if a redirect was followed, or false if no page found
local function getContent(page, frame)
local title = mw.title.new(page) -- Read description page (for :File:Foo rather than File:Foo)
if not title then return false, false end
local redir = getRedirectTarget(title)
if redir then title = mw.title.new(redir) end
return title:getContent(), redir or title.prefixedText
end
-- Main function returns a string value: nutshell text from the {{nutshell}} template on the given page.
local function main(frame)
local pagename = frame.args[1]
if not pagename then return err("No page names given") end
local text
text, normalisedPagename = getContent(pagename)
if not normalisedPagename then
return err("No title for page name " .. pagename)
end
if text then
local isStub = mw.ustring.find(text, "%s*{{[^{|}]*%-[Ss]tub%s*}}")
if isStub then text = nil end
end
if not text then return err("Cannot read a valid page: page name is " .. pagename) end
local nutshell = mw.ustring.match(text, "{{[Nn]utshell|(.-)}}")
if not nutshell then return err("Page has no nutshell text: " .. pagename) end
-- Remove wikilinks.
nutshell, _ = mw.ustring.gsub(nutshell, "%[%[.-[:|]", "")
nutshell, _ = mw.ustring.gsub(nutshell, "%]%]", "")
return frame:preprocess(nutshell)
end
function p.main(pagename) return main(pagename) end
return p