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2024-04-19T17:41:00Z

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wikimedia>Jarekt: split core.parseStatements into 2 functions

2022-04-17T03:19:40Z

split core.parseStatements into 2 functions

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--[[
__ __ _ _ ____
| \/ | ___ __| |_ _| | ___ _ / ___|___ _ __ ___
| |\/| |/ _ \ / _` | | | | |/ _ (_) | / _ \| '__/ _ \
| | | | (_) | (_| | |_| | | __/_| |__| (_) | | | __/
|_| |_|\___/ \__,_|\__,_|_|\___(_)\____\___/|_| \___|

Core is a meta-module that consists of common and useful Lua functions that can
be used in many Lua scripts. It was writen as a core of several Lua
modules for creating file infobox templates on Commons. Many of the functions
are bare-bones versions of full functions found in other modules.

Authors and maintainers:
* User:Jarekt
]]

local core = {}

------------------------------------------------------------------------------
--[[
Based on frame structure create "args" table with all the input parameters:
* table keys - equivalent to template parameters are converted to lower case
so they will not be case-sensitive.
Also underscored are treated the same way as speces.
* table values - input values are trimmed (whitespaces removed from the beggining
and the end) and empty string are converted to nils.
If "lang" is not provided than we substitute user's prefered language.

This function collects inputs from both frame and frame's parent. See
https://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#frame:getParent .
If both structures have the same field than value from "frame" takes priority.

Inputs:
1) frame - frame objects see below for details
https://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#frame-object

See also: Module:Arguments on enWiki - which is much larger single purpose module
]]
function core.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)
if (args.lang and mw.language.isSupportedLanguage(args.lang)) then
args.lang = string.lower(args.lang)
else
args.lang = frame:callParserFunction("int","lang") -- get user's chosen language
end
return args
end

------------------------------------------------------------------------------
--[[
Simplified code equivalent to https://commons.wikimedia.org/wiki/Template:LangSwitch

Example usage:
text = langSwitch({en='text in english', pl='tekst po polsku'}, lang)

Inputs:
1: args - table with translations by language
2: lang - desired language (often user's native language)

Outputs:
1: label - returned label
2: lang - language of the label (langSwitchWithLang only)
]]
function core.langSwitchWithLang(args, lang)
local langList = mw.language.getFallbacksFor(lang)
table.insert(langList,1,lang)
for i,language in ipairs(langList) do
if args[language] then
return args[language], language
end
end
end

function core.langSwitch(args, lang)
local label, lang = core.langSwitchWithLang(args, lang)
return label
end

------------------------------------------------------------------------------
--[[
display a language followed by a message. Like "English: Hello" with extensive HTML marking
Code equivalent to https://commons.wikimedia.org/wiki/Template:Description
Inputs:
1) text_lang - language code for the above text, also used as a name of the CSS formating class
2) text - description text to display
3) args - additional optional arguments. Numbers in perenthesis are parameter numbers in the original template.
* hover - (3) hover aka mouseover aka tooltip text
* lang_tag - (4) standard code for lang tag in HTML (optional, default is same as text_lang)
* ext - (5) extension text shown after the language name before colon (optional, default is empty)
* inline - Optional, default is false. When set to true, forces the template to be displayed
inline, so that it does not break the current paragraph (that makes possible to put several
descriptions side by side on a single line)
]]
function core.langWrapper(text_lang, text, args)
local dir, space, colon, lang_name, hover
local inline = core.yesno(args.inline, false) and 'inline' or nil
if mw.language.isKnownLanguageTag(text_lang) then -- supported language
local langObj = mw.language.new( text_lang )
dir = langObj:getDir() -- text direction
space = mw.message.new( "Word-separator" ):inLanguage(text_lang):plain()
colon = mw.message.new( "Colon" ):inLanguage(text_lang):plain()
hover = mw.language.fetchLanguageName( text_lang, args.user_lang or 'en')
lang_name = mw.language.fetchLanguageName( text_lang, text_lang)
lang_name = langObj:ucfirst(lang_name)
else -- unsuported language
local RTL_LUT = {['fa-af']=1, prd=1, ydd=1}
dir = (RTL_LUT[text_lang]==1 or text_lang:gsub('-arab', '')~=text_lang) and 'rtl' or 'ltr'
space = ' '
colon = ':'
hover = args.hover
lang_name = text_lang or 'Unknown'
end
lang_name = args.lang_name or lang_name-- user provided args.lang_name takes presedent
lang_name = '<b>' .. lang_name .. (args.ext or '') .. colon .. '</b>'

-- create HTML
local ltag = mw.html.create('span') -- bold language name string
:addClass('language') -- class: "language"
:addClass(text_lang) -- class: "en", "de" etc.
:attr('title', hover) -- add hover aka mouseover aka tooltip text
:wikitext(lang_name)
local dtag = mw.html.create('div')
:addClass('description') -- div.description is tracked by mw:Extension:CommonsMetadata
:addClass('mw-content-'..dir) -- mw-content-rtl and mw-content-ltr are defined in mediawiki-code (https://gerrit.wikimedia.org/r/c/mediawiki/core/+/208332)
:addClass(text_lang) -- not sure where "en", "de" etc. are defined
:attr('dir', dir)
:attr('lang', text_lang)
:css('display', inline)
:wikitext(tostring(ltag) .. space .. text)
return tostring(dtag)
end

------------------------------------------------------------------------------
--[[
Function allowing for consistent treatment of boolean-like wikitext input.
Inputs:
1) val - value to be evaluated, outputs as a function of values:
true : true (boolean), 1 (number), or strings: "yes", "y", "true", "1"
false : false (boolean), 0 (number), or strings: "no", "n", "false", "0"
2) default - value to return otherwise
See Also: It works similarly to Module:Yesno
]]
function core.yesno(val, default)
if type(val) == 'boolean' then
return val
elseif type(val) == 'number' then
val = tostring(val)
end
if type(val) == 'string' then
local LUT = {
yes=true , y=true , ['true'] =true , t=true , ['1']=true , on =true,
no =false, n=false, ['false']=false, f=false, ['0']=false, off=false }
val = LUT[mw.ustring.lower(val)] -- put in lower case
if (val~=nil) then
return val
end
end
return default
end

------------------------------------------------------------------------------
--[[
Read Commons Data:SOMENAME.tab dataset and look for message identified by a
"key" in a language "lang". See editAtWikidata for an example. It uses
https://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#mw.ext.data

Inputs:
1) dataset - name of commons page in "data" namespace. for example "I18n/EditAt.tab"
for c:Data:I18n/EditAt.tab
2) key - which message to pull
3) lang - desired language of the message
Output: message as a string
]]
function core.formatMessage(dataset, key, lang)
for _, row in pairs(mw.ext.data.get(dataset, lang).data) do
local id, msg = unpack(row)
if id == key then
return mw.message.newRawMessage(msg):plain()
end
end
error('Invalid message key "' .. key .. '"')
end

------------------------------------------------------------------------------
--[[
Assembles the "Edit at Wikidata" pen icon with a link to Wikidata page or specific
property and returns it as wikitext string.
Inputs:
1) entityID - wikidata entity object for a given page (output of wikibase.getEntity( id ))
2) propertyID - string like 'P31' so the link will point to that specific property. Use ""
to link to the whole page.
3) lang - language of the "Edit at Wikidata" message
Dependencies: Data:I18n/EditAt.tab
See Also: en:Module:EditAtWikidata
]]
-------------------------------------------------------------------------------
function core.editAtWikidata(entityID, propertyID, lang)
local msg = core.formatMessage('I18n/EditAt.tab', 'EditAtWikidata', lang)
local link = 'https://www.wikidata.org/wiki/' .. entityID .. (propertyID == "" and "" or ("#" .. propertyID))
return " [[File:OOjs UI icon edit-ltr-progressive.svg |frameless |text-top |10px |alt="..msg.."|link="..link.."|"..msg.."]]"
end

------------------------------------------------------------------------------
--[[
Assembles the "Edit at SDC" pen icon with a link to a property in SDC part of the current file
page, and returns it as wikitext string.
Inputs:
2) propertyID - string like 'P31' so the link will point to that specific property. Use 'ooui-php-4'
to link to the label section.
3) lang - language of the "Edit at Wikidata" message
Dependencies: Data:I18n/EditAt.tab
See Also: en:Module:EditAtWikidata
]]
function core.editAtSDC(propertyID, lang)
local msg = core.formatMessage('I18n/EditAt.tab', 'EditAtSDC', lang)
local link = mw.title.getCurrentTitle():fullUrl() .. (propertyID == "" and "" or ("#" .. propertyID))
return " [[File:OOjs UI icon edit-ltr-progressive.svg |frameless |text-top |10px |alt="..msg.."|link="..link.."|"..msg.."]]"
end

-------------------------------------------------------------------------------
--[[
This function returns a label translated to desired language, created based on wikidata
Code equivalent to require("Module:Wikidata label")._getLabel

Inputs:
1: item - wikidata's item's q-id or entity class
2: userLang - desired language of the label
]]
function core.getLabel(item, userLang)
local label, link
-- build language fallback list
local langList = mw.language.getFallbacksFor(userLang)
table.insert(langList, 1, userLang)
-- get label
for _, lang in ipairs(langList) do -- loop over language fallback list looking for label in the specific language
label = mw.wikibase.getLabelByLang(item, lang)
if label then break end -- label found and we are done
end
label = label or item -- fallback value
-- get link
for _, lang in ipairs(langList) do -- loop over language fallback list looking for label in the specific language
link = mw.wikibase.getSitelink(item, lang .. 'wiki')
if link then
link = mw.ustring.format('w:%s:%s', lang, link)
break
end
end
link = link or 'd:'..item -- fallback value
-- look for description
local desc = mw.wikibase.getDescription(item)
if desc then -- add description if we have one
desc = mw.text.nowiki(desc) -- add description as hover text
label = '<span title="' .. desc .. '">' .. label .. '</span>'
end
return '[['..link..'|'..label..']]'
end

-------------------------------------------------------------------------------
--[[
Core component of many "get property value" functions
Example: (core.parse_statements(entity:getBestStatements( prop ), nil) or {nil})[1] would
return the first best statement
Inputs:
1: statements - can be provided by:
* entity:getBestStatements( prop )
* entity:getAllStatements( prop )
* mw.wikibase.getBestStatements( item, prop )
* mw.wikibase.getAllStatements( item, prop )
2: lang - language code (like "en"), if provided than item IDs will be
changed to a label
Output:
* table of strings or nil
]]
function core.parseStatements(statements, lang)
local output = {}
for _, statement in ipairs(statements) do
if (statement.mainsnak.snaktype == "value") and (statement.rank ~= 'deprecated') then
table.insert(output, core.parseSnak(statement.mainsnak, lang))
end
end
if #output==0 then return nil end
return output
end

-------------------------------------------------------------------------------
--[[
parse part of the statement called "snak"

Inputs:
1: snak -
2: lang - language code (like "en"), if provided than item IDs will be
changed to a label
Output:
* string
]]
function core.parseSnak(snak, lang)
local val = snak.datavalue.value
if val.id then
val = val.id
if lang ~= nil then
val = core.getLabel(val, lang)
end
elseif val.text then
val = val.text
elseif val.amount then
val = tonumber(val.amount)
elseif val.time then -- handle most dates (use [[Module:Wikidata date]] for the rest
local gregorian = 'http://www.wikidata.org/entity/Q1985727'
if (val.calendarmodel==gregorian) and (mw.ustring.sub(val.time,1,1)=='+') and val.precision >= 9 then
local trim = 3*math.min(val.precision,11) - 22 -- day (11)->11, month (10)->8, year (9)->5
val = mw.ustring.sub(val.time, 2, trim) -- return YYYY-MM-DD, YYYY-MM or YYYY depending on precission
end
end
return val
end

return core

Module:Core - Revision history

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wikimedia>Jarekt: split core.parseStatements into 2 functions