Module:Namespace has subpages
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This module is rated as ready for general use. It has reached a mature form and is thought to be bug-free and ready for use wherever appropriate. It is ready to mention on help pages and other resources as an option for new users to learn. To reduce server load and bad output, it should be improved by sandbox testing rather than repeated trial-and-error editing. |
Implements {{ns has subpages}}.
Module Quality
Usage
{{#invoke:Namespace has subpages|function_name}}
-- This module implements [[Template:Ns has subpages]].
-- While the template is fairly simple, this information is made available to
-- Lua directly, so using a module means that we don't have to update the
-- template as new namespaces are added.
local p = {}
function p._main(ns, frame)
-- Get the current namespace if we were not passed one.
if not ns then
ns = mw.title.getCurrentTitle().namespace
end
-- Look up the namespace table from mw.site.namespaces. This should work
-- for a majority of cases.
local nsTable = mw.site.namespaces[ns]
-- Try using string matching to get the namespace from page names.
-- Do a quick and dirty bad title check to try and make sure we do the same
-- thing as {{NAMESPACE}} in most cases.
if not nsTable and type(ns) == 'string' and not ns:find('[<>|%[%]{}]') then
local nsStripped = ns:gsub('^[_%s]*:', '')
nsStripped = nsStripped:gsub(':.*$', '')
nsTable = mw.site.namespaces[nsStripped]
end
-- If we still have no match then try the {{NAMESPACE}} parser function,
-- which should catch the remainder of cases. Don't use a mw.title object,
-- as this would increment the expensive function count for each new page
-- tested.
if not nsTable then
frame = frame or mw.getCurrentFrame()
local nsProcessed = frame:callParserFunction('NAMESPACE', ns)
nsTable = nsProcessed and mw.site.namespaces[nsProcessed]
end
return nsTable and nsTable.hasSubpages
end
function p.main(frame)
local ns = frame:getParent().args[1]
if ns then
ns = ns:match('^%s*(.-)%s*$') -- trim whitespace
ns = tonumber(ns) or ns
end
local hasSubpages = p._main(ns, frame)
return hasSubpages and 'yes' or ''
end
return p