Module:Wp/dtp/Taxonbar/candidate

This Lua module is used on approximately 395,000 pages, or roughly 13% of all pages.
To avoid major disruption and server load, any changes should be tested in the module's /sandbox or /testcases subpages, or in your own module sandbox. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them.

Lua error in Module:Wp/dtp/Lua_banner at line 112: attempt to index field 'edit' (a nil value). Template:Wp/dtp/Lua sidebar

About

This template is designed to be called from {{Taxobox/core}} or a related template, and tracks pages which may be candidates for a {{Taxonbar}}.

If no {{Taxonbar}} exists on the transcluded page, the page's Wikidata item is checked against this whitelist of acceptable Template:Wp/dtp/Wdpls/Template:Wp/dtp/Wdpls, and this blacklist of unacceptable properties.

If an acceptable instance/subclass is found, then the page is categorized as:

Category:Taxobox articles missing a taxonbar (0)

If no acceptables nor unacceptables are found, then it is categorized as:

Category:Taxobox articles possibly missing a taxonbar (37)

If no acceptables & at least 1 unacceptable is found, then no categorization is performed.

Usage

{{Taxonbar/candidate}}

Associated lists

Template:Wp/dtp/columns-start Whitelist Template:Wp/dtp/Taxonbar/whitelist Template:Wp/dtp/column Blacklist Template:Wp/dtp/Taxonbar/blacklist Template:Wp/dtp/columns-end

local p = {}

function p.check(frame)
	local taxonbarExists = require('Module:Wp/dtp/Taxonbar/exists').check
	if taxonbarExists(frame) then
		return ''
	else
		local resolveEntity = require( 'Module:Wp/dtp/ResolveEntityId' )
		local currentTitle = mw.title.getCurrentTitle()
		local currentItem = nil
		local categories = {
			'[[Category:Taxobox articles possibly missing a taxonbar]]' --unset if acceptable or unacceptable found
		}
		
		--preliminary exclusion criteria
		if string.match( currentTitle.text, '^List of ') then
			return ''
		end
		
		--find Wikidata item
		if currentTitle.namespace == 0 then --mainspace
			local currentEntityId = mw.wikibase.getEntityIdForCurrentPage()
			if resolveEntity._id(currentEntityId) then
				currentItem = mw.wikibase.getEntity(currentEntityId)
			else --currentEntityId == nil/unresolvable
				return categories[1]
			end
		else
			return ''
		end
		
		if currentItem then --currentItem should not be nil here, but check just in case
			--determine if {{Taxonbar}} is *definitely* missing, *possibly* missing, or not missing at all
			local whitelist = require( 'Module:Wp/dtp/Taxonbar/whitelist' ).whitelist
			local blacklist = require( 'Module:Wp/dtp/Taxonbar/blacklist' ).blacklist
			local acceptableInstanceOf_All = whitelist{ args = { 'all' } }
			local unacceptableInstanceOf = blacklist{ args = {} }
			
			local acceptableCount = 0
			local unacceptableCount = 0
			for _, instanceOfState in pairs ( currentItem:getBestStatements('P31') ) do --instance of
				local instanceOf = instanceOfState.mainsnak.datavalue.value.id
				if acceptableInstanceOf_All[instanceOf] then
					acceptableCount = acceptableCount + 1
				elseif unacceptableInstanceOf[instanceOf] then
					unacceptableCount = unacceptableCount + 1
				end
			end
			for _, subclassOfState in pairs ( currentItem:getBestStatements('P279') ) do --subclass of
				local subclassOf = subclassOfState.mainsnak.datavalue.value.id
				if acceptableInstanceOf_All[subclassOf] then
					acceptableCount = acceptableCount + 1
				elseif unacceptableInstanceOf[subclassOf] then
					unacceptableCount = unacceptableCount + 1
				end
			end
			
			if acceptableCount > 0 then
				categories[1] = ''
				categories[2] = '[[Category:Taxobox articles missing a taxonbar]]'
			elseif unacceptableCount > 0 then
				categories[1] = ''
				categories[2] = ''
			end
			
			return table.concat(categories)
			
		else
			return ''
		end
	end
end

return p