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TemplUtl – Library module with functions to support template programming.

Functions for templates

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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
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
nowiki1
If the first character of trimmed text is a list symbol *#;: then return it as an HTML entity
failsafe
Version ID (local): 2022-05-16
Optional parameter:
  • 1 – Minimum version or wikidata or ~
{{#invoke:TemplUtl|failsafe}} yields 2022-05-16
With a parameter as ISO date it is compared whether the current module satisfies this version or later.
  • {{#invoke:TemplUtl|failsafe|2001-01-01}} returns: »2022-05-16«
  • {{#invoke:TemplUtl|failsafe|2099-01-01}} returns: »« – (empty), if minimal version condition not matched
  • If keyword is wikidata, result is version ID registered on Wikidata (2022-05-16) or local if not found there.
  • If keyword is ~, result is empty if local and Wikidata version are the same: ().
Returns:
  • Empty, if minimal version condition not matched, or ~ and local version is synchronized.
  • Version ID if no parameter, or if wikidata, or local if not found there, or not synchronized.

Examples (test page)

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A test page illustrates practical use.

Functions for Lua modules (API)

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All functions described above can be used by other modules:

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

Subsequently there are available:

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.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

General library; no limitations.

Dependencies

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No modules.

Installation on other WMF projects

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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.