Modul:Multilingual
Die Dokumentation für dieses Modul kann unter Modul:Multilingual/Doku erstellt werden
local Multilingual = { suite = "Multilingual",
serial = "2018-04-16",
item = 47541920 }
local User = { sniffer = "publishchanges" }
Multilingual.exotic = { simple = true,
no = true }
local favorite = function ()
-- Postcondition:
-- Returns code of current project language
if not Multilingual.self then
Multilingual.self = mw.language.getContentLanguage():getCode()
:lower()
end
return Multilingual.self
end -- favorite()
function feasible( ask, accept )
-- Is ask to be supported by application?
-- Precondition:
-- ask -- lowercase code
-- accept -- sequence table, with offered lowercase codes
-- Postcondition:
-- nil, or true
local r
for i = 1, #accept do
if accept[ i ] == ask then
r = true
break -- for i
end
end -- for i
return r
end -- feasible()
local fetch = function ( access, allow )
-- Attach config or library module
-- Precondition:
-- access -- module title
-- allow -- permit non-existence
-- Postcondition:
-- Returns table or false, with library
-- Throws error, if not available
if type( Multilingual.ext ) ~= "table" then
Multilingual.ext = { }
end
if Multilingual.ext[ access ] == false then
elseif not Multilingual.ext[ access ] then
local lucky, got = pcall( require, "Module:" .. access )
if lucky then
if type( got ) == "table" then
Multilingual.ext[ access ] = got
if type( got[ access ] ) == "function" then
Multilingual.ext[ access ] = got[ access ]()
end
end
end
if type( Multilingual.ext[ access ] ) ~= "table" then
if allow then
Multilingual.ext[ access ] = false
else
got = string.format( "Module:%s invalid", access )
error( got, 0 )
end
end
end
return Multilingual.ext[ access ]
end -- fetch()
function find( ask, alien )
-- Derive language code from name
-- Precondition:
-- ask -- language name, downcased
-- alien -- language code of ask
-- Postcondition:
-- nil, or string
local codes = mw.language.fetchLanguageNames( alien, "all" )
local r
for k, v in pairs( codes ) do
if mw.ustring.lower( v ) == ask then
r = k
break -- for k, v
end
end -- for k, v
if not r then
r = Multilingual.fair( ask )
end
return r
end -- find()
User.favorize = function ( accept, frame )
-- Guess user language
-- Precondition:
-- accept -- sequence table, with offered ISO 639 etc. codes
-- frame -- frame, if available
-- Postcondition:
-- Returns string with best code, or nil
if not ( User.self or User.langs ) then
if not User.trials then
User.tell = mw.message.new( User.sniffer )
if User.tell:exists() then
User.trials = { }
if not Multilingual.frame then
if frame then
Multilingual.frame = frame
else
Multilingual.frame = mw.getCurrentFrame()
end
end
User.sin = Multilingual.frame:callParserFunction( "int",
User.sniffer )
else
User.langs = true
end
end
if User.sin then
local s, sin
for i = 1, #accept do
s = accept[ i ]
if not User.trials[ s ] then
sin = User.tell:inLanguage( s ):plain()
if sin == User.sin then
User.self = s
break -- for i
else
User.trials[ s ] = true
end
end
end -- for i
end
end
return User.self
end -- User.favorize()
Multilingual.fair = function ( ask )
-- Format language specification according to RFC 5646 etc.
-- Precondition:
-- ask -- string or table, as created by .getLang()
-- Postcondition:
-- Returns string, or false
local s = type( ask )
local q, r
if s == "table" then
q = ask
elseif s == "string" then
q = Multilingual.getLang( ask )
end
if q and
q.legal and
mw.language.isKnownLanguageTag( q.base ) then
r = q.base
if q.n > 1 then
local order = { "extlang",
"script",
"region",
"other",
"extension" }
for i = 1, #order do
s = q[ order[ i ] ]
if s then
r = string.format( "%s-%s", r, s )
end
end -- for i
end
end
return r or false
end -- Multilingual.fair()
Multilingual.fallback = function ( able, another )
-- Is another language suitable as replacement?
-- Precondition:
-- able -- language version specifier to be supported
-- another -- language specifier of a possible replacement
-- Postcondition:
-- Returns boolean
local r
if type( able ) == "string" and
type( another ) == "string" then
if able == another then
r = true
else
local s = Multilingual.getBase( able )
if s == another then
r = true
else
local others = mw.language.getFallbacksFor( s )
r = feasible( another, others )
end
end
end
return r or false
end -- Multilingual.fallback()
Multilingual.findCode = function ( ask )
-- Retrieve code of local (current project or English) language name
-- Precondition:
-- ask -- string, with presumable language name
-- A code itself will be identified, too.
-- Postcondition:
-- Returns string, or false
local seek = mw.text.trim( ask )
local r = false
if #seek > 1 then
if seek:find( "[", 1, true ) then
seek = fetch( "WLink" ).getPlain( seek )
end
seek = mw.ustring.lower( seek )
if Multilingual.isLang( seek ) then
r = Multilingual.fair( seek )
else
local slang = favorite()
r = find( seek, slang )
if not r and slang ~= "en" then
r = find( seek, "en" )
end
end
end
return r
end -- Multilingual.findCode()
Multilingual.format = function ( apply, alien, alter, active, alert,
frame, assembly, adjacent, ahead )
-- Format one or more languages
-- Precondition:
-- apply -- string with language list or item
-- alien -- language of the answer
-- -- nil, false, "*": native
-- -- "!": current project
-- -- "#": code, downcased, space separated
-- -- "-": code, mixcase, space separated
-- -- any valid code
-- alter -- capitalize, if "c"; downcase all, if "d"
-- capitalize first item only, if "f"
-- downcase every first word only, if "m"
-- active -- link items, if true
-- alert -- string with category title in case of error
-- frame -- if available
-- assembly -- string with split pattern, if list expected
-- adjacent -- string with list separator, else assembly
-- ahead -- string to prepend first element, if any
-- Postcondition:
-- Returns string, or false if apply empty
local r = false
if apply then
local slang
if assembly then
local bucket = mw.text.split( apply, assembly )
local shift = alter
local separator
if adjacent then
separator = adjacent
elseif alien == "#" or alien == "-" then
separator = " "
else
separator = assembly
end
for k, v in pairs( bucket ) do
slang = Multilingual.format( v, alien, shift, active,
alert )
if slang then
if r then
r = string.format( "%s%s%s",
r, separator, slang )
else
r = slang
if shift == "f" then
shift = "d"
end
end
end
end -- for k, v
if r and ahead then
r = ahead .. r
end
else
local single = mw.text.trim( apply )
if single == "" then
r = false
else
local lapsus, slot
slang = Multilingual.findCode( single )
if slang then
if alien == "-" then
r = slang
elseif alien == "#" then
r = slang:lower()
else
r = Multilingual.getName( slang, alien )
if active then
local cnf = fetch( "Multilingual/config",
true )
if cnf and
type( cnf.getLink ) == "function" then
if not Multilingual.frame then
if frame then
Multilingual.frame = frame
else
Multilingual.frame
= mw.getCurrentFrame()
end
end
slot = cnf.getLink( slang,
Multilingual.frame )
if slot then
local wlink = fetch( "WLink" )
slot = wlink.getTarget( slot )
else
lapsus = alert
end
end
end
end
else
r = single
if active then
local title = mw.title.makeTitle( 0, single )
if title.exists then
slot = single
end
end
lapsus = alert
end
if not r then
r = single
elseif alter == "c" or alter == "f" then
r = mw.ustring.upper( mw.ustring.sub( r, 1, 1 ) )
.. mw.ustring.sub( r, 2 )
elseif alter == "d" then
if Multilingual.isMinusculable( slang, r ) then
r = mw.ustring.lower( r )
end
elseif alter == "m" then
if Multilingual.isMinusculable( slang, r ) then
r = mw.ustring.lower( mw.ustring.sub( r, 1, 1 ) )
.. mw.ustring.sub( r, 2 )
end
end
if slot then
if r == slot then
r = string.format( "[[%s]]", r )
else
r = string.format( "[[%s|%s]]", slot, r )
end
end
if lapsus and alert then
r = string.format( "%s[[Category:%s]]", r, alert )
end
end
end
end
return r
end -- Multilingual.format()
Multilingual.getBase = function ( ask )
-- Retrieve base language from possibly combined ISO language code
-- Precondition:
-- ask -- language code
-- Postcondition:
-- Returns string, or false
local r
if ask then
local slang = ask:match( "^%s*(%a%a%a?)-?%a*%s*$" )
if slang then
r = slang:lower()
else
r = false
end
else
r = false
end
return r
end -- Multilingual.getBase()
Multilingual.getLang = function ( ask )
-- Retrieve components of a RFC 5646 language code
-- Precondition:
-- ask -- language code with subtags
-- Postcondition:
-- Returns table with formatted subtags
-- .base
-- .region
-- .script
-- .year
-- .extension
-- .other
-- .n
local tags = mw.text.split( ask, "-" )
local s = tags[ 1 ]
local r
if s:match( "^%a%a%a?$" ) then
r = { base = s:lower(),
legal = true,
n = #tags }
for i = 2, r.n do
s = tags[ i ]
if #s == 2 then
if r.region or not s:match( "%a%a" ) then
r.legal = false
else
r.region = s:upper()
end
elseif #s == 4 then
if s:match( "%a%a%a%a" ) then
r.legal = ( not r.script )
r.script = s:sub( 1, 1 ):upper() ..
s:sub( 2 ):lower()
elseif s:match( "20%d%d" ) or
s:match( "1%d%d%d" ) then
r.legal = ( not r.year )
r.year = s
else
r.legal = false
end
elseif #s == 3 then
if r.extlang or not s:match( "%a%a%a" ) then
r.legal = false
else
r.extlang = s:lower()
end
elseif #s == 1 then
s = s:lower()
if s:match( "[tux]" ) then
r.extension = s
for k = i + 1, r.n do
s = tags[ k ]
if s:match( "^%w+$" ) then
r.extension = string.format( "%s-%s",
r.extension, s )
else
r.legal = false
end
end -- for k
else
r.legal = false
end
break -- for i
else
r.legal = ( not r.other ) and
s:match( "%a%a%a" )
r.other = s:lower()
end
if not r.legal then
break -- for i
end
end -- for i
else
r = { legal = false }
end
return r
end -- Multilingual.getLang()
Multilingual.getName = function ( ask, alien )
-- Which name is assigned to this language code?
-- Precondition:
-- ask -- language code
-- alien -- language of the answer
-- -- nil, false, "*": native
-- -- "!": current project
-- -- any valid code
-- Postcondition:
-- Returns string, or false
local r
if ask then
local slang = alien
local support = "Multilingual/names"
local tLang
if slang then
if slang == "*" then
slang = Multilingual.fair( ask )
elseif slang == "!" then
slang = favorite()
else
slang = Multilingual.fair( slang )
end
else
slang = Multilingual.fair( ask )
end
if not slang then
slang = ask or "?????"
end
slang = slang:lower()
tLang = fetch( support, true )
if tLang then
tLang = tLang[ slang ]
if tLang then
r = tLang[ ask ]
end
end
if not r then
if not Multilingual.ext.tMW then
Multilingual.ext.tMW = { }
end
tLang = Multilingual.ext.tMW[ slang ]
if tLang == nil then
tLang = mw.language.fetchLanguageNames( slang )
if tLang then
Multilingual.ext.tMW[ slang ] = tLang
else
Multilingual.ext.tMW[ slang ] = false
end
end
if tLang then
r = tLang[ ask ]
end
end
if not r then
r = mw.language.fetchLanguageName( ask:lower(), slang )
if r == "" then
r = false
end
end
else
r = false
end
return r
end -- Multilingual.getName()
Multilingual.int = function ( access, alien, apply )
-- Translated system message
-- Precondition:
-- access -- message ID
-- alien -- language code
-- apply -- nil, or sequence table with parameters $1, $2, ...
-- Postcondition:
-- Returns string, or false
local o = mw.message.new( access )
local r
if o:exists() then
if type( alien ) == "string" then
o:inLanguage( alien:lower() )
end
if type( apply ) == "table" then
o:params( apply )
end
r = o:plain()
end
return r or false
end -- Multilingual.int()
Multilingual.isLang = function ( ask, additional )
-- Could this be an ISO language code?
-- Precondition:
-- ask -- language code
-- additional -- true, if Wiki codes like "simple" permitted
-- Postcondition:
-- Returns boolean
local r, s
if additional then
s = ask
else
s = Multilingual.getBase( ask )
end
if s then
r = mw.language.isKnownLanguageTag( s )
if not r and additional then
r = Multilingual.exotic[ s ] or false
end
else
r = false
end
return r
end -- Multilingual.isLang()
Multilingual.isLangWiki = function ( ask )
-- Could this be a Wiki language version?
-- Precondition:
-- ask -- language version specifier
-- Postcondition:
-- Returns boolean
local r
local s = Multilingual.getBase( ask )
if s then
r = mw.language.isSupportedLanguage( s ) or
Multilingual.exotic[ ask ]
else
r = false
end
return r
end -- Multilingual.isLangWiki()
Multilingual.isMinusculable = function ( ask, assigned )
-- Could this language name become downcased?
-- Precondition:
-- ask -- language code, or nil
-- assigned -- language name, or nil
-- Postcondition:
-- Returns boolean
local r = true
if ask then
local cnf = fetch( "Multilingual/config", true )
if cnf then
local s = string.format( " %s ", ask:lower() )
if type( cnf.stopMinusculization ) == "string"
and cnf.stopMinusculization:find( s, 1, true ) then
r = false
end
if r and assigned
and type( cnf.seekMinusculization ) == "string"
and cnf.seekMinusculization:find( s, 1, true )
and type( cnf.scanMinusculization ) == "string" then
local scan = assigned:gsub( "[%(%)]", " " ) .. " "
if not scan:find( cnf.scanMinusculization ) then
r = false
end
end
end
end
return r
end -- Multilingual.isMinusculable()
Multilingual.userLang = function ( accept, frame )
-- Try to support user language by application
-- Precondition:
-- accept -- space separated list of available ISO 639 codes
-- Default: project language, or English
-- frame -- frame, if available
-- Postcondition:
-- Returns string with appropriate code
local s = type( accept )
local codes, r, slang
if s == "string" then
codes = mw.text.split( accept:lower(), " " )
elseif s == "table" then
codes = { }
for i = 1, #accept do
s = accept[ i ]
if type( s ) == "string" then
table.insert( codes, s:lower() )
end
end -- for i
else
codes = { }
slang = favorite()
if mw.language.isKnownLanguageTag( slang ) then
table.insert( codes, slang )
end
end
slang = User.favorize( codes, frame )
if not slang then
slang = favorite() or "en"
end
if feasible( slang, codes ) then
r = slang
elseif slang:find( "-", 1, true ) then
slang = Multilingual.getBase( slang )
if feasible( slang, codes ) then
r = slang
end
end
if not r then
local others = mw.language.getFallbacksFor( slang )
for i = 1, #others do
slang = others[ i ]
if feasible( slang, codes ) then
r = slang
break -- for i
end
end -- for i
if not r then
if feasible( "en", codes ) then
r = "en"
else
r = codes[ 1 ]
end
end
end
return r
end -- Multilingual.userLang()
Multilingual.userLangCode = function ()
-- Guess a user language code
-- Postcondition:
-- Returns code of current best guess
return User.self or favorite() or "en"
end -- Multilingual.userLangCode()
Multilingual.failsafe = function ( assert )
-- Retrieve versioning and check for compliance
-- Precondition:
-- assert -- string, with required version or "wikidata",
-- or false
-- Postcondition:
-- Returns string with appropriate version, or false
local since = assert
local r
if since == "wikidata" then
local item = Multilingual.item
since = false
if type( item ) == "number" and item > 0 then
local entity = mw.wikibase.getEntity( string.format( "Q%d",
item ) )
if type( entity ) == "table" then
local vsn = entity:formatPropertyValues( "P348" )
if type( vsn ) == "table" and
type( vsn.value) == "string" and
vsn.value ~= "" then
r = vsn.value
end
end
end
end
if not r then
if not since or since <= Multilingual.serial then
r = Multilingual.serial
else
r = false
end
end
return r
end -- Multilingual.failsafe()
-- Export
local p = { }
p.fair = function ( frame )
-- Format language code
-- 1 -- language code
return Multilingual.fair( frame.args[ 1 ] ) or ""
end -- p.fair
p.fallback = function ( frame )
-- Is another language suitable as replacement?
-- 1 -- language version specifier to be supported
-- 2 -- language specifier of a possible replacement
local r = Multilingual.fallback( frame.args[ 1 ], frame.args[ 2 ] )
return r and "1" or ""
end -- p.fallback
p.findCode = function ( frame )
-- Retrieve language code from language name
-- 1 -- name in current project language
return Multilingual.findCode( frame.args[ 1 ] ) or ""
end -- p.findCode
p.format = function ( frame )
-- Format one or more languages
-- 1 -- language list or item
-- slang -- language of the answer, if not native
-- * -- native
-- ! -- current project
-- any valid code
-- shift -- capitalize, if "c"; downcase, if "d"
-- capitalize first item only, if "f"
-- link -- 1 -- link items
-- scream -- category title in case of error
-- split -- split pattern, if list expected
-- separator -- list separator, else split
-- start -- prepend first element, if any
local r
local link
if frame.args.link == "1" then
link = true
end
r = Multilingual.format( frame.args[ 1 ],
frame.args.slang,
frame.args.shift,
link,
frame.args.scream,
frame,
frame.args.split,
frame.args.separator,
frame.args.start )
return r or ""
end -- p.format
p.getBase = function ( frame )
-- Retrieve base language from possibly combined ISO language code
-- 1 -- code
return Multilingual.getBase( frame.args[ 1 ] ) or ""
end -- p.getBase
p.getName = function ( frame )
-- Retrieve language name from ISO language code
-- 1 -- code
-- 2 -- language to be used for the answer, if not native
-- ! -- current project
-- * -- native
-- any valid code
local slang = frame.args[ 2 ]
local r
if slang then
slang = mw.text.trim( slang )
end
r = Multilingual.getName( frame.args[ 1 ], slang )
return r or ""
end -- p.getName
p.int = function ( frame )
-- Translated system message
-- 1 -- message ID
-- lang -- language code
-- $1, $2, ... -- parameters
local sysMsg = frame.args[ 1 ]
local r
if sysMsg then
sysMsg = mw.text.trim( sysMsg )
if sysMsg ~= "" then
local n = 0
local slang = frame.args.lang
local i, params, s
if slang == "" then
slang = false
end
for k, v in pairs( frame.args ) do
if type( k ) == "string" then
s = k:match( "^%$(%d+)$" )
if s then
i = tonumber( s )
if i > n then
n = i
end
end
end
end -- for k, v
if n > 0 then
local s
params = { }
for i = 1, n do
s = frame.args[ "$" .. tostring( i ) ] or ""
table.insert( params, s )
end -- for i
end
r = Multilingual.int( sysMsg, slang, params )
end
end
return r or ""
end -- p.int
p.isLang = function ( frame )
-- Could this be an ISO language code?
-- 1 -- code
local lucky, r = pcall( Multilingual.isLang,
frame.args[ 1 ] )
return r and "1" or ""
end -- p.isLang
p.isLangWiki = function ( frame )
-- Could this be a Wiki language version?
-- 1 -- code
local lucky, r = pcall( Multilingual.isLangWiki,
frame.args[ 1 ] )
return r and "1" or ""
end -- p.isLangWiki
p.kannDeutsch = function ( frame )
-- Kann man mit diesem Sprachcode deutsch verstehen?
-- 1 -- code
local r = Multilingual.fallback( frame.args[ 1 ], "de" )
return r and "1" or ""
end -- p.kannDeutsch
p.userLang = function ( frame )
-- Which language does the current user prefer?
-- 1 -- space separated list of available ISO 639 codes
return Multilingual.userLang( frame.args[ 1 ], frame )
end -- p.userLang
p.failsafe = function ( frame )
-- Versioning interface
local s = type( frame )
local since
if s == "table" then
since = frame.args[ 1 ]
elseif s == "string" then
since = frame
end
if since then
since = mw.text.trim( since )
if since == "" then
since = false
end
end
return Multilingual.failsafe( since ) or ""
end -- p.failsafe()
p.Multilingual = function ()
return Multilingual
end -- p.Multilingual
return p