Module:GetShortDescription/sandbox: Difference between revisions

Revision as of 08:38, 26 January 2023

Revision as of 09:08, 26 January 2023

Line 1:

local p = {}

local getArgsmLang = require( 'Module:ArgumentsLang' ).getArgs

local getTransclusion = require( 'Module:Transcluder' ).get

local function errorMessage( message )

Line 10 ⟶ 8:

local function getWikidataDescription( name, lang )

mw.log("Getting Wikidata description: " .. name)

local wikidata_id = mw.wikibase.getEntityIdForTitle( name )

if not wikidata_id then

Line 19 ⟶ 16:

return nil

end

-- Do as little as possible; return wikidata_description immediately if no more processing is required.

if lang.no or wikidata_description_lang == 'en' then

return wikidata_description

Line 25 ⟶ 23:

return nil

end

return mLang._lang {

local current_frame = mw.getCurrentFrame()

wikidata_description_lang,

if not current_frame then

wikidata_description,

return errorMessage( 'could not getCurrentFrame' )

italic = lang.italic or '',

end

nocat = lang.nocat or '',

local non_english_wikidata_description = current_frame:expandTemplate {

titlesize = 'lang.size or '',

argscat = {lang.cat or '',

rtl = lang.rtl or ''

wikidata_description_lang,

wikidata_description,

italic = lang.italic or '',

nocat = lang.nocat or '',

size = lang.size or '',

cat = lang.cat or '',

rtl = lang.rtl or ''

}

}

if not non_english_wikidata_description then

return errorMessage( 'could not expandTemplate lang' )

end

return non_english_wikidata_description

end

local function getExplicitDescription( name )

local page_content = mw.title.new( name ):getContent()

mw.log("Getting explicit description: " .. name)

if not current_framepage_content then

local short_description_template = getTransclusion( name .. '#', { only = 'templates', templates = '[Ss]hort description' } )

return errorMessage( 'could not getCurrentFramegetContent of [[:' .. name .. '|' .. name .. ']]' )

if not short_description_template then

end

-- Search for a short description template and grab the parameters from it if found.

-- Do as little as possible; return nil immediately if that's what we found.

local short_description_content = mw.ustring.match( page_content, '{{%s*[Ss]hort description%s*|%s*(.-)%s*}}' )

if not short_description_content then

return nil

end

-- The following mess is an alternative to preprocessing, which is expensive and

mw.log(short_description_template)

-- causes empty strings to be returned if the invocation is substituted.

local current_frame = mw.getCurrentFrame()

-- Why does it look like this though?

if not current_frame then

-- Short descriptions defined by template {{short description}} may contain:

return errorMessage( 'could not getCurrentFrame' )

-- a numbered or unnumbered 1st param for the description

-- a numbered or unnumbered 2nd param for noreplace

-- the pagetype named param

-- an empty description

-- we might therefore need to understand the content of:

-- {{short description|2=noreplace|pagetype=Redirect|Redirect page}} or

-- {{short description|2=noreplace|1=Redirect page|pagetype=Redirect}} or

-- {{short description|pagetype=Redirect|Redirect page|noreplace}} etc.

-- all with a variety white space.

-- Split the param content into trimmed param expressions.

local short_description_params = mw.text.split( short_description_content, '%s*|%s*' )

local short_description

-- For each param expession:

for i, param in ipairs( short_description_params ) do

-- ignore 'pagetype=<anything>'

-- ignore 'noreplace' if unnumbered or numbered as '2='

if not mw.ustring.match( param, '^pagetype%s*=' )

and not mw.ustring.match( param, '^noreplace$' )

and not mw.ustring.match( param, '^2%s*=' ) then

-- Whatever remains is the short description expression.

short_description = param

break

end

end

-- The short descrition expression might be in the form

-- 'short description' or

-- '1=short description'

-- If the latter; trim the leading '1='.

if mw.ustring.match( short_description, '=' ) then

short_description = mw.ustring.gsub( short_description, '^1%s*=%s*', '' )

end

-- Now we know what this template's short description is,

local preprocessed_short_description_template = current_frame:preprocess( short_description_template )

-- check if it's in use and return nil if not.

mw.log(preprocessed_short_description_template)

if mw.ustring.match( short_description, '^[Nn]one$' ) then

if not preprocessed_short_description_template then

short_description = nil

return errorMessage( 'could not preprocess short_description_template' )

end

-- It could still be a completely useless string e.g.

return mw.ustring.match( preprocessed_short_description_template, '>%s*(.-)%s*<' )

-- {{short description| &nbsp; &nbsp; &nbsp; &nbsp; }}

-- creates an 8 character short description of entirely whitespace.

-- Trim the result before return.

return mw.ustring.match( preprocessed_short_description_templateshort_description, '>^%s*(.[^%s]-)%s*<$' )

end

local function p._maingetShortDescription( args )

local name = args.name

if not name then

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result = getWikidataDescription( name, lang ) or getExplicitDescription( name )

end

return result or args.fallback or ''

end

function p.main( frame )

localreturn args = getArgsgetShortDescription( frame.args ) or ''

if not args then

return errorMessage( 'could not getArgs' )

end

return p._main( args )

end