Wikipedia:Lua/Modul/PageAttributes/en

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PageAttributes – Module to assign attributes to pages or entire namespaces.

Functions for templates

f

Retrieve attributes of a particular page

Parameter:

1

group = submodule name

(mandatory)

2

page name

if first character # and digits only following: numerical page ID

(optional) default: current page

Returns:

assigned attribute value

1 for true

empty for false or nothing assigned oder unknown group

failsafe

Version management

The Failsafe interface is heading for version management of globally distributed Lua modules. It enables modules equipped with this interface to

• ensure, that a library module required by a template or another module available as local copy does support certain functionality, or complain if not.
• administrate global updating and linking of module codes via Wikidata.

The Failsafe interface is present both at template level and for direct Lua access.

The functions in detail are (not all supported yet completely by every library):

Parameter

Value	Result	current
nothing false	local version ID	»2022-06-06«
Minimal version	version ID required at least date in ISO format It will be compared whether the current local implementation matches this version or later. empty, if minimal version not achieved	2001-01-01 → »2022-06-06« 2099-01-01 → »«
wikidata	version ID of global upstream version ID at Wikidata local, if not found there	»2022-06-06«
item	ID of the Wikidata item empty if not defined	Q112249306
~	Corresponding version ID locally and registered at Wikidata empty, if up to date version ID at Wikidata, if not equal	»«
@	Is the current (module) page linked correctly with Wikidata item? empty, if linked to the item which is supposed Iitem ID, if not	»Q112249306«
The return value is in template programming empty or under Lua false, otherwis a non-empty string as described.

sub-modules for groups

A group of properties may be defined via a sub-module.

• Currently the name needs to be a direct sub page of the root module within the local Wiki. With JSON, in the future other namespaces will be accessible.
• It is supposed to be of type mw.loadData but may be JSON in future.
• The following components may be returned:
  • rooms – table
    • Assignments to namespace numbers
  • pageids – table
    • Assignments to particular page ids
  • failsafe – string
    • Version ID

Lookup for known groups

Functions for Lua modules (API)

The functions described above can be used by other modules per require() :

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

Then there is available:

PageAttributes.f(ask,another)

Query for a single page

ask

group = submodule name

(mandatory)

another

Page identification

• string – page name, also with first character # and digits only following as page nummer
• number – page nummer
• table – mw.title

default: current page

Returns:

assigned attribute value

string, number, boolean, nil

false if nothing assigned

nil if unknown group

PageAttributes.failsafe( atleast )

Version management

Returns: string oder false

Dependencies

None.