Module:Wikidata label

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This module is intended to be the engine behind "Template:Label". This module was copied from Commons please ask for changes there.

Please do not modify this code without applying the changes first at "Module:Wikidata label/sandbox" and testing at "Module:Wikidata label/testcases".

Authors and maintainers:
 * User:Jarekt - original version

]]

require('strict') -- used for debugging purposes as it detects cases of unintended global variables

--============================================= --=== Internal functions ====================== --=============================================

--- -- Normalize input arguments by converting them all to lower case and -- replacing space with "_" in the argument name. Also empty strings are -- converted to nils. Arguments are collected from arguments passed to the -- module and if missing from the template that calls the module local function getArgs(frame) local function normalize_input_args(input_args, output_args) for name, value in pairs( input_args ) do			value = mw.text.trim(value) -- trim whitespaces from the beggining and the end of the string if value ~= '' then -- nuke empty strings if type(name)=='string' then name = string.gsub( string.lower(name), ' ', '_') end output_args[name] = value end end return output_args end local args = {} args = normalize_input_args(frame:getParent.args, args) args = normalize_input_args(frame.args, args) return args end

--- -- Function allowing for consistent treatment of boolean-like wikitext input. -- It works similarly to Module:Yesno but does not assume val is a string local function yesno(val, default) if type(val) == 'boolean' then return val elseif type(val) == 'number' then if val == 1 then return true elseif val == 0 then return false end elseif type(val) == 'string' then val = mw.ustring.lower(val) -- put in lower case if val == 'no' or val == 'n' or val == 'false' or val == '0' then return false elseif val == 'yes' or val == 'y' or val == 'true' or val == '1' then return true end end return default end

- -- get message in a given language -- INPUTS: -- * msg - name of a message. For it to work MediaWiki:msg page need to be set up -- * lang - translate message to language "lang" -- * default - string to return in case this module is moved to a project where this message is not set -- OUTPUT: -- * translated message local function getMessage(msg, lang, default) msg = mw.message.new(msg):inLanguage(lang):plain return (msg == nil and default) or msg end

--- -- use different sitelink call depending if you already have an entity or not -- INPUTS: -- * item and entity - entity id and entity: if full entity already uploded than use that --                     otherwise use entity id to look up sitelink -- * lang - language of the project -- OUTPUT: -- * sitelink local function getSitelink(item, entity, lang) if entity and entity.getSitelink then -- if we have entity then use it return entity:getSitelink(lang .. 'wiki') else -- if no entity then use different function return mw.wikibase.getSitelink(item, lang .. 'wiki') end end

--- -- use different sitelink call depending if you already have an entity or not -- INPUTS: -- * item and entity - entity id and entity: if full entity already uploded than use that --                     otherwise use entity id to look up sitelink -- * prop - property for which to return the best statment -- OUTPUT: -- * value of the best statment (only from the first one) local function getBestStatementsValue(item, entity, prop) local statments if entity then statments = entity:getBestStatements(prop) else statments = mw.wikibase.getBestStatements(item, prop) end for _, statment in ipairs(statments) do		if statment and statment.mainsnak.datavalue.value then return statment.mainsnak.datavalue.value end end end

--- -- change capitalization of the label -- INPUTS: -- * label - label string -- * capitalization - capitalization to be applied: allowed values are "lc", --     "uc", "lcfirst", and "ucfirst". Any other value will return original string -- * lang - language of the label -- OUTPUT: -- * value of the best statment (only from the first one) local function apply_capitalization(label, capitalization, lang) capitalization = string.lower(capitalization or 'none') if capitalization == 'none' then return label elseif capitalization == 'uc' then return mw.ustring.upper(label) elseif capitalization == 'ucfirst' then return mw.language.new(lang):ucfirst(label) elseif capitalization == 'lc' then return mw.ustring.lower(label) elseif capitalization == 'lcfirst' then return mw.language.new(lang):lcfirst(label) end return label end

--- get link based on user preference INPUTS:  * "wikidata" - link to wikidata   * "wikipedia" - link to wikipedia (language dependent)   * "wikidata talk" - link to wikidata talk page   * "commons" - link to commons (try sitelink then commons category then commons gallery)   * "commonscat" - link to commons (try commons category then commons gallery)   * "-" - means no link OUTPUT: local function getLink(link_type, item, entity, langList) local link, eLink link_type = mw.ustring.lower(link_type or '') local item_type = mw.ustring.sub(item, 1, 1) -- first letter prefix of item entity ID: 'Q', 'P' or 'M'	if item_type == 'M' then eLink='c:Special:EntityPage/'..item elseif item_type == 'Q' then eLink='d:'..item -- wikibase entity page link elseif item_type == 'P' then eLink='d:Property:'..item -- wikibase entity page link else eLink='d:Special:EntityPage/'..item end if link_type == '-' then -- allow different link formats link = ''           -- no link elseif link_type == 'wikidata' or item_type == 'M' then link = eLink       -- link to wikibase entity page elseif link_type == 'wikidata talk' and item_type == 'P' then link = 'd:Property talk:'.. item       -- link to wikidata property talk page elseif link_type == 'wikidata talk' then link = 'd:Talk:'..item  -- link to wikidata talk page elseif link_type == 'commons' or link_type == 'commonscat' then --		When link_type == 'commons' we try the following links (in specified order):		 1) commons sitelink		  2) P373 "Commons Category" claims		  3) P935 "Commons Gallery"  claims		Since most items have a commons sitelink we never have to look for claims		When link_type == 'commonscat' we try to maximize chances of commons link being a category, so we		      try the following links (in specified order):		  1) commons sitelink, which is kept if it points to a category		  2) P373 "Commons Category" claims		  3) commons sitelink (which does not point to a category)		  4) P935 "Commons Gallery"  claims		Since most pages have a commons sitelink we never have to look for claims				local sLink = getSitelink(item, entity, 'commons')  -- look for sitelink to commons		if sLink then			sLink = 'c:'..sLink			if (link_type == 'commons') or (link_type == 'commonscat' and mw.ustring.find(sLink, 'Category:')) then link = sLink end end if not link then -- try linking to P373 "Commons Category" local cat = getBestStatementsValue(item, entity, 'P373') link = (cat ~= nil and 'c:Category:' .. cat) or nil end link = link or sLink if not link then -- try linking to P935 "Commons Gallery" link = getBestStatementsValue(item, entity, 'P935') end end if not link then -- apply default "Wikipedia" link type for _, language in ipairs(langList) do			local sitelink = getSitelink(item, entity, language) if sitelink then link = 'w:'.. language ..':'.. sitelink break end end end return link or eLink -- no wiki sitelink, so link to wikidata end
 * link_type - can be :
 * item  - entity ID (always provided)
 * entity - whole entity. It can be nil if whole entity is not loaded
 * langList - language fallback list for preferred language (required)
 * link - link to the wikimedia page

--============================================= --=== External functions ====================== --============================================= local p = {}

--====================================================================== --=== API functions for use from other Scribunto modules =============== --======================================================================

--[[ _getLabel

This function returns a label translated to desired language, created based on wikidata

Inputs: 1: item - wikidata's item's q-id or entity class 2: lang - desired language of the label 3: link_type - link style. Possible values (case-insensitive): "wikipedia", "wikidata", "Commons", or "-" (no link) 4: capitalization - can be "uc" (upper case), "lc" (lower case), "ucfirst" (upper case for the first letter), "lcfirst" (lower case for the first letter), or 'none' (default)

Error Handling: Bad q-id will result in displayed error ]] function p._getLabel(item, lang, link_type, capitalization, show_id) local entity, s, link, label, language

-- clean up the input parameters if type(item) ~= 'string' then -- "item" is not a q-id entity = item           -- "item" must be the entity item  = entity.id       -- look-up q-id elseif tonumber(item) then  -- if it is just the number then add "Q" in front item = 'Q'..item end item = mw.ustring.gsub(mw.ustring.upper(item), 'PROPERTY:P', 'P') -- make all the properties the same and capitalize

if not lang then label, lang = mw.wikibase.getLabelWithLang(item) end if not lang then -- if still no language lang = mw.getCurrentFrame:callParserFunction("int","lang")  -- get user's chosen language label = nil end

-- build language fallback list lang = mw.ustring.lower(lang) local langList = mw.language.getFallbacksFor(lang) table.insert(langList, 1, lang)

-- get label (visible part of the link) if not label then for _, language in ipairs(langList) do -- loop over language fallback list looking for label in the specific language if entity then label = entity:getLabel(language) else label = mw.wikibase.getLabelByLang(item, language) end if label then break end                   -- label found and we are done end end if not label then                             -- no labels found, so just show the q-id label = item elseif show_id then          -- add id		show_id = yesno(show_id,false) if show_id then local wordsep = getMessage('Word-separator', lang, ' ') local id = mw.message.new('parentheses', item):inLanguage(lang):plain id = (id~=nil and id) or ('('..item..')') -- in case this module is moved to a project where is not set label = label .. wordsep .. " " .. id .. " "		end end label = apply_capitalization(label, capitalization, lang)

-- return the results if link_type == '-' then return label -- return just the label else link = getLink(link_type, item, entity, langList) return  .. label ..  -- return link end end

--[[--- _sitelinks

This function returns a table of sitelinks for a single project organized by language

Inputs: 1: item - wikidata's item's q-id or entity class 2: project - (case-insensitive) one of: "wikipedia", "wikisource", "wikiquote", "wikibooks", "wikinews", "wikiversity", "wikivoyage", "wiktionary", "commons", "mediawiki", "wikispecies", "wikidata", etc.

Output: Table of sitelinks with language fields

Output: Table of sitelinks with language fields See also ]] function p._sitelinks(item, project) local entity, sitelink -- get entity if type(item) == 'string' then -- "item" is a q-id entity = mw.wikibase.getEntity(item) else entity = item             -- "item" is the entity end
 * for the full list of supported interwikis.
 * for the full list of sitecodes (used in database dumps).

-- convert from english project name to proproject code local projLUT = { wikipedia  = 'wiki',           commons   = 'commonswiki', foundation = 'foundationwiki', mediawiki = 'mediawikiwiki', wikispecies = 'specieswiki',   wikidata  = 'wikidatawiki', incubator  = 'incubatorwiki',	oldwikisource = 'sourceswiki', }	local langLUT = { -- These are not language codes before the 'wiki' or 'wikiversity' suffix in a sitecode: foundation = '~', commons = '~',	-- they will be skipped incubator = '~', meta    = '~', mediawiki = '~', sources = '~', species   = '~', beta    = '~', -- Legacy language codes used in sitecodes, remapped to standard Wikimedia language codes: -- See https://meta.wikimedia.org/wiki/Special_language_codes for details als    = 'gsw', bat_smg      = 'sgs', fiu_vro = 'vro', be_x_old    = 'be-tarask', roa_rup = 'rup', zh_classical = 'lzh', zh_yue = 'yue', zh_min_nan   = 'nan', zh_wuu = 'wuu', no           = 'nb', }	project = project:lower project = projLUT[project] or project -- correct the project name local n = project:len local linkTable = {} if entity and entity.sitelinks then -- See if entity exists, and that it has sitelinks for _, sitelink in pairs(entity.sitelinks) do -- loop over all sitelinks local site = sitelink.site local m   = site:len - n			local proj = site:sub(m +1)  -- project part of the siteID if proj == project then -- proj matches desired "project" local lang = site:sub(1, m) -- language part of the siteID lang = langLUT[lang] or lang:gsub('_','-') if lang ~= '~' then -- proj matches desired "project" linkTable[lang] = sitelink.title end end end end return linkTable end

--[[ _aliases

This function returns a table of aliases for a single language

Inputs: 1: item - wikidata's item's q-id or entity class 2: lang - language code, like 'en' or 'de'

Output: Table of aliases with language fields ]] function p._aliases(item, lang) local entity if type(item) == 'string' then -- "item" is a q-id entity = mw.wikibase.getEntity(item) else entity = item           -- "item" is the entity end local aliasTable = {} if entity and entity.aliases then						-- See if there is an entity and that is has aliases if entity.aliases[lang] then						-- See if it has English Aliases for _, alias in pairs(entity.aliases[lang]) do -- Make a loop around the English aliases table.insert(aliasTable, alias.value)				-- Create a table of English aliases end end end return aliasTable end

--====================================================================== --=== Invoke functions for use from wikitext, e.g., templates ========== ---=====================================================================

--[[ getLabel

This function returns a label translated to desired language, created based on wikidata

Usage:

Parameters 1: wikidata's item's q-id (required) 2: language (optional; default ) 3: link_style: "wikipedia" (default), "Wikidata", "Commons", or "-" (no link) 4: capitalization - can be "uc", "lc", "ucfirst", "lcfirst"

Error Handling: Bad q-id will result in displayed error ]] function p.getLabel(frame) local args = getArgs(frame) return p._getLabel(args.item, args.lang, args.link, args.capitalization, args.show_id) end

--[[--- sitelinks

This function returns a comma separated list of sitelinks for a single project organized by language Its main purpose is to help with testing of _sitelinks function.

Usage:

Inputs: 1: item - wikidata's item's q-id or entity class 2: project - "wikipedia" (or "wiki"), "wikisource", "wikiquote", "wikibooks", "wikinews", "wikiversity", "wikivoyage", "wiktionary", etc.

Output: comma separated list ]] function p.sitelinks(frame) local args = getArgs(frame) local sitelinks = p._sitelinks(args.item, args.project) local sitelinkList = {} for lang, sitelink in pairs(sitelinks) do table.insert(sitelinkList, (lang=='' and sitelink) or (lang .. ':' .. sitelink)) end return table.concat(sitelinkList, ', ') end

--[[ aliases

This function returns a comma separated list of aliases for a single language Its main purpose is to help with testing of _aliases function.

Usage:

Inputs: 1: item - wikidata's item's q-id or entity class 2: lang - language code, like 'en' or 'de'

Output: Comma separated list of aliases ]] function p.aliases(frame) local args = getArgs(frame) return table.concat(p._aliases(args.item, args.lang), ', ') end

return p