Wikipedia:Lua/Modul/TemplUtl/en

Wikipedia:Lua Modul TemplUtl en

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TemplUtl – Library module with functions to support template programming.

Functions for templates

facets
Split into searchable word tokens (groups öf letters and digits in any scripting, separated by interpunction and special characters)
Parameters:
1
Text to be splitted
decode
(optional); default: HTML entity decoding
% – URL decoding
Result: splitted string
faculty
Boolean choice (yes/no) for parameter values depending on page language
Parameters:
1
Parameter value to be analysed
Space characters will be ignored, upcased/downcased letters not significant; two interpretations:
  • empty, 0, false, n, no, off, 0000, - plus local language: German nein
  • 1, true, y, yes, on; 0101 (boolean OR concatenation) plus local language: German ja, j
2
Behaviour if value 1 not recognized.
(optional)
1 – “yes” (default)
0 – “no”
Result:
  • empty for “no”
  • not empty (1) for “yes”
Test page with example results.
Project and page language specific adaption (non-English)
failure
Format error message; in edit preview of source text editing will be repeated and linked on page head
Parameters:
1
error message
2
Visibility of error message on presentation
(optional)
0 – “invisible” (default)
1 – “visible”
Result: HTML element
fair
Decode string
Parameters:
1
Text
decode
(optional); default: HTML entity decoding
% – URL decoding
Result: decoded string
fake
Simulating a template transclusion; will vanish from Special:Unusedtemplates (especially for substituting templates, and any auxilary template pages like test, maintenance, editnotice, preload and more, wich are never transcluded by regular means).
1
Title or name of template (not current page, would cause transclusion loop)
fakes
Like fake for entire series
1 2 3 4 5 6 7 8 9 …
Title or name or name part of one template, any number
prefix
(optional) Will be prepended each name part
list
(optional) 1 – Link each entry; as bulleted list
firstbreak
If the first character of trimmed text is a list symbol *#;: or table begin or termination then precede a newline
from
Present the name of the transcluding (template) page as clickable link decorrated with curly brackets
isRedirect
Is the transclusion made within a redirect page
nowiki
Trim text and replace effective syntax by HTML entities
  • Critical characters: "&'<=>[]{|}
  • If the first character of trimmed text, also after line break, is a list symbol *#;: then return it as an HTML entity.
  • Magic words: //:, ISBN , PMID , RFC 
nowiki1
If the first character of trimmed text is a list symbol *#;: then return it as an HTML entity
failsafe

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 »2026-07-01«
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 → »2026-07-01«
  • 2099-01-01 → »«
wikidata version ID of global upstream
  • version ID at Wikidata
  • local, if not found there
»2026-04-28«
item ID of the Wikidata item
  • empty if not defined
Q52364930
~ Corresponding version ID locally and registered at Wikidata
  • empty, if up to date
  • version ID at Wikidata, if not equal
»2026-04-28«
@ Is the current (module) page linked correctly with Wikidata item?
  • empty, if linked to the item which is supposed
  • Iitem ID, if not
The return value is in template programming empty or under Lua false, otherwis a non-empty string as described.

Examples (test page)

A test page illustrates practical use.

Functions for Lua modules (API)

All functions described above can be used by other modules:

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

Subsequently there are available:

TemplUtl.facets( ask, adjust )
  • ask – string to be splitted
  • adjust – (optional) % for URL decoding
TemplUtl.faculty( analyze, another, frame )
  • analyze – string, number, boolean, nil; what is to be analysed
  • another – (optional) string, number, boolean; fallback if analyze not recognized
  • frame – (optional) object; if ready to hand
Returns: true, if “yes”, else false
Numbers other than 0 are “yes”.
TemplUtl.fair( ask, adjust )
  • ask – string to be decoded
  • adjust – (optional) % for URL decoding
TemplUtl.fake( access )
  • access – (optional) string, boolean, nil; name of template
TemplUtl.fakes( array, frame, ahead, answer )
  • array – table; with template title strings at numerical elements
  • frame – (optional) object; if available
  • ahead – (optional) string, nil; prepended begin if title
  • answer – (optional) true, nil; create bulleted list of links
Returns: string, if answer
TemplUtl.failure( alert, always )
  • analyze – string; error message
  • always – (optional) boolean; visibility of error message on presentation
Returns: string, even empty
TemplUtl.feasible( address )
Does this describe an URL beginning?
  • address – string; what to inspect, URL presumed
Returns: true, if URL beginning (even protocol relative).
TemplUtl.feed( area, ahead, at, after )
Detect next free | oder }}.
  • area – string; what is to be searched
    • Should contain template transclusion only, to avoid outer matches.
  • ahead – string; opening element, or false
    • One of [ [[ {{ {{{ or false
  • at – number; byte position in area, where to start
  • aftertrue, if only to search for }}
  • Note: For the transclusion begin found by .find() the adjacent termination can be retrieved, or when {{ is provided for ahead.
Returns two values:
  1. number; byte position in area
    • before | or }} – may be at end of area.
    • position to continue search; ahead has been closed.
  2. true, if search to be continued at number.
TemplUtl.feeder( area, at )
Retrieve all parameters of a template transclusion.
  • area – string; what is to be searched
  • at – (optional) number; byte position in area, byte position in area, where to start
Returns two values:
  1. table; parameter value assignments
    • [0] – template, page, parser function name
    • [1] … – unnamed parameters
    • ["name"] … – named parameters
  2. string; error message, if any, else nil
HTML comments won’t be returned.
TemplUtl.fetch( area, ask )
Find assignment of a named template parameter.
  • area – string; what is to be searched
    • Should contain template transclusion only, to avoid outer matches.
  • ask – string; name of parameter
Returns: string, with trimmed parameter value, or nil.
TemplUtl.find( area, access, at, alter )
Find next occurrence of a template.
  • area – string; what is to be searched
  • access – string; trimmed (template) title
  • at – (optional) number; ustring position in area, if not 1
  • alter – (optional) string; lowercase namespace pattern, no colon (:)
    • "" for article (main spave)
    • false for template
Returns: number, ustring position of {{ in area, or false.
TemplUtl.flat( area )
Remove syntax elements that hide effective syntax only (HTML comments, nowiki pre syntaxhighlight).
  • area – string; what is to be searched
Returns: string, with area reduced by masking text syntax.
TemplUtl.failsafe( atleast )
Versioning interface
  1. atleast
    optional
    nil or minimum version or wikidata or ~ for synchronisation
returns: Version ID as string or false

Usage

General library; no limitations.

Dependencies

No modules.

Installation on other WMF projects

Follow the steps:

  1. Copy main module Module:TemplUtl into your project.
    • If possible keep the name TemplUtl.
    • If another name is required due to conflict or naming convention or non-latin script then choose a different one.
  2. Register this module at d:Q52364930.
  3. Check whether your language is covered by: commons:Data:I18n/01.tab
  4. Ready.
  5. Consider translation of doc page.

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