imported>RexxS: sync from Commons

2019-02-24T14:36:55Z

sync from Commons

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--[[
__ __ _ _ _ ____ _ _ _
| \/ | ___ __| |_ _| | ___ _| | __ _ _ __ __ _/ ___|_ _(_) |_ ___| |__
| |\/| |/ _ \ / _` | | | | |/ _ (_) | / _` | '_ \ / _` \___ \ \ /\ / / | __/ __| '_ \
| | | | (_) | (_| | |_| | | __/_| |__| (_| | | | | (_| |___) \ V V /| | || (__| | | |
|_| |_|\___/ \__,_|\__,_|_|\___(_)_____\__,_|_| |_|\__, |____/ \_/\_/ |_|\__\___|_| |_|
|___/
Authors and maintainers:
* User:Zolo - original version in Module:Fallback
* User:Jarekt
]]

local p = {}

--[[
_langSwitch

This function is the core part of the LangSwitch template.

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

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

Error Handling:

]]
local function defaultCheck(args)
if not args.en and not args.default then
local err = '<b class="error">LangSwitch Error: no default</b>'
if args.nocat == '1' then
return err
else
return err .. '[[Category:LangSwitch template without default version]]'
end
end
return false
end

local function quickSwitch(args, arg)
local err = defaultCheck(args)
if err then
return err
end
if arg == '~' then
arg = ''
end
return arg
end

function p._langSwitch(args, lang) -- args: table of translations
-- Return error if there is not default and no english version
local err = defaultCheck(args)
if err then
return err
end
-- get the list of accepetable language (lang + those in lang's fallback chain) and check their content
assert(lang, 'LangSwitch Error: no lang')

--local langList = {lang}
--if not args[lang] then
local langList = mw.language.getFallbacksFor(lang)
table.insert(langList, 1, lang)
table.insert(langList, math.max(#langList, 2), 'default')
--end

for _, language in ipairs(langList) do
lang = args[language]
if lang == '~' then
return ''
elseif lang and lang ~= '' then
return lang
end
end
end

--[[
langSwitch

This function is the core part of the LangSwitch template.

Example Usage from a template:
{{#invoke:fallback|langSwitch|en=text in english|pl=tekst po polsku|lang={{int:lang}} }}

Parameters:
frame.args - table with translations by language
frame.args.lang - desired language (often user's native language)

Error Handling:

]]
function p.langSwitch(frame) -- version to be used from wikitext
local args = frame.args
-- if no expected args provided than check parent template/module args
if args.en == nil and args.default == nil and args.nocat == nil then
args = mw.getCurrentFrame():getParent().args
end

local lang = args.lang
if not lang or not mw.language.isSupportedLanguage(lang) then
lang = frame:callParserFunction("int", "lang") -- get user's chosen language
end

-- Try quick switch
local args1 = args[lang]
if args1 and args1 ~= '' then
return quickSwitch(args, args1)
end

-- Allow input in format: {{LangSwitch|de=Grün|es/it/pt=Verde|fr=Vert|en=Green |lang=en}}
-- with multiple languages mapping to a single value
args1 = {}
for name, value in pairs(args) do
if value ~= '' and type(name) == 'string' then
-- split multi keys
for str in string.gmatch(name, "([^/]+)") do
args1[str] = value
end
end
end
return p._langSwitch(args1, lang)
end

return p

Module:LangSwitch - Revision history

imported>RexxS: sync from Commons