Module:Page: Difference between revisions
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-- subpages = require('Module:Page').subpages | -- subpages = require('Module:Page').subpages | ||
-- for page in subpages('Page') do ... end | -- for page in subpages('Page', [{options}]) do ... end | ||
function _M.subpages(title, options ) | |||
local title, options, pattern = _M.clean(title), options or {}; | |||
pattern, title = pcall(mw.title.new, title, 0); | |||
if not pattern or not title then | |||
return ipairs({}); | |||
elseif not options.ignoreNS and not mw.site.namespaces[title.namespace].hasSubpages then | |||
return ipairs({}); | |||
end | |||
options.ignoreNS = nil; | |||
pattern = table.concat{ string.rep( '.', string.len( title.text ) ), '/', '([^\r\n]+)\r?\n' }; | |||
title = title.prefixedText; | |||
local frame, expand, decode = mw:getCurrentFrame(), mw.text.unstrip, mw.text.decode; | |||
local function get(name, options, pattern ) | |||
local params = {}; | |||
for k,v in pairs(options) do | |||
table.insert( params, table.concat{ k, '=', v ~= nil and tostring(v) or '' } ); | |||
end | |||
params = table.concat( params, '|' ); | |||
if params ~= "" then params = table.concat{ '|', params }; end | |||
--[[ | |||
Due to a change in Scribunto for Lua, expand() will no longer work on special tags, | |||
including <gallery>, <ref> or other costly extension tags (except "#tag:") or special parser | |||
functions which are converted to UNIQ markers starting and ending by an ASCII DEL character ('\127'). | |||
mw.text.unstrip() now ONLY expands and unstrips "<nowiki>" tags, and completely kills ALL others | |||
markers without expanding them to their generated HTML! | |||
The actual full expansion of stripped tags can occur only in MediaWiki after return from Lua. | |||
@see https://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#mw.text.unstrip | |||
For this reason we only get an empty list of subpages, and we can no longer bypass the costly | |||
expansion limits of "#ifexist:" or costly calls to mw.title.new() by using the Special:prefixindex | |||
parser function... | |||
It is also not possible to use frame:callParserFunction() to process "Special:*" parser functions, | |||
even if they are converted to "#tag:Special*" in Mediawiki, they are stripped in MediaWiki, | |||
but they not found by Lua's frame:callParserFunction(). | |||
As well frame:extensionTag() cannot be used and generate the same error in Lua (tag "special" not found). | |||
end | --]] | ||
params = expand( frame:preprocess( string.format('{{special:prefixindex/%s/%s}}', name, params) ) ); | |||
params = string.gsub( params, '%b<>', function(tag) return tag == '</a>' and '\n' or ''; end ); | |||
local | options = {} | ||
for k in string.gmatch( params, pattern ) do table.insert( options, decode(k) ); end | |||
return options; | |||
end; | |||
local subpages = get( title, options, pattern ); | |||
return function(title, last) | |||
local page; | |||
while true do | |||
page = table.remove( subpages, 1 ); | |||
if page ~= nil then return page, last; end | |||
options.from = table.concat{ title, '/', last }; | |||
subpages = get( title, options, pattern ); | |||
table.remove( subpages, 1 ); | |||
if #subpages == 0 then | |||
return nil; | |||
end | end | ||
end | end | ||
end, title; | |||
end | |||
end | end | ||
return _M | return _M | ||