Wikipedia:Lua/Modul/TemplUtl/en

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A Weidaloatung mocha

TemplUtl – Library module with functions to support template programming.

Functions for templates

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

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)

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.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
• after – true, 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.