# Module:Language

require('strict')  
local m_data = mw.loadData("Module:Language/data")  
local langData = m_data.languages or m_data  

local p = {}  

local function ifNotEmpty(value)  
if value == "" then  
return nil  
else  
return value  
end  
end  

local function makeLinkedName(languageCode)  
local data = langData[languageCode]  
local article = data["article"]  
local name = data["Wikipedia_name"] or data["name"]  
return "" .. name .. ":&nbsp;"  
end  

local function makeEntryName(word, languageCode)  
local data = langData[languageCode]  
local ugsub = mw.ustring.gsub  
word = tostring(word)  
if word == nil then  
error("The function makeEntryName requires a string argument")  
elseif word == "" then  
return ""  
else  
-- Remove bold and italics, so that words that contain bolding or emphasis can be linked without piping.  
word = word:gsub("\'\'\'", "")  
word = word:gsub("\'\'", "")  
if data == nil then  
return word  
else  
local replacements = data and data["replacements"]  
if replacements == nil then  
return word  
else  
-- Decompose so that the diacritics of characters such  
-- as á can be removed in one go.  
-- No need to compose at the end, because the MediaWiki software  
-- will handle that.  
if replacements.decompose then  
word = mw.ustring.toNFD(word)  
for i, from in ipairs(replacements.from) do  
word = ugsub(  
word,  
from,  
replacements.to and replacements.to[i] or "")  
end  
else  
for regex, replacement in pairs(replacements) do  
word = ugsub(word, regex, replacement)  
end  
end  
return word  
end  
end  
end  
end  

p.makeEntryName = makeEntryName  

local function fixScriptCode(firstLetter, threeLetters)  
return string.upper(firstLetter) .. string.lower(threeLetters)  
end  

local function getCodes(codes, text)  
local languageCode, scriptCode, invalidCode  
local errorText  
if codes == nil or codes == "" then  
errorText = 'no language or script code provided'  
elseif codes:find("^%a%a%a?$") or codes:find("^%a%a%a?%-%a%a%a%a$") then  
-- A three- or two-letter lowercase sequence at beginning of first parameter  
languageCode =  
codes:find("^%a%a%a?") and (  
codes:match("^(%l%l%l?)")  
or codes:match("^(%a%a%a?)")  
:gsub("(%a%a%a?)", string.lower, 1)  
-- One uppercase and three lowercase letters at the end of the first parameter  
scriptCode =  
codes:find("%a%a%a%a$") and (  
codes:match("(%u%l%l%l)$")  
or gsub(  
codes:match("(%a%a%a%a)$"),  
"(%a)(%a%a%a)",  
fixScriptCode,  
1  
elseif codes:find("^%a%a%a?%-%a%a%a?$")  
or codes:find("^%a%a%a%-%a%a%a%-%a%a%a$") then  
languageCode = codes  

-- Private-use subtag: x followed by one or more sequences of 1-8 lowercase  
-- letters separated by hyphens. This only allows for one sequence, as it is  
-- needed for proto-languages such as ine-x-proto (Proto-Indo-European).  
elseif codes:find("^%a%a%a?%-x%-%a%a?%a?%a?%a?%a?%a?%a?$") then  
languageCode, scriptCode =  
codes:match("^(%a%a%a%-x%-%a%a?%a?%a?%a?%a?%a?%a?)%-?(.*)$")  
if not languageCode then  
errorText = '<code>'..codes..'</code> is not a valid language or script code.'  
elseif scriptCode ~= "" and not scriptCode:find("%a%a%a%a") then  
errorText = '<code>'..scriptCode..'</code> is not a valid script code.'  
else  
scriptCode = scriptCode:gsub(  
"(%a)(%a%a%a)",  
fixScriptCode,  
1  
end  
elseif codes:find("^%a%a%a?") then  
languageCode, invalidCode = codes:match("^(%a%a%a?)%-?(.*)")  
languageCode = string.lower(languageCode)  
errorText = '<code>'..invalidCode..'</code> is not a valid script code.'  
elseif codes:find("%-?%a%a%a%a$") then  
invalidCode, scriptCode = codes:match("(.*)%-?(%a%a%a%a)$")  
scriptCode = gsub(  
scriptCode,  
"(%a)(%a%a%a)",  
fixScriptCode  
errorText = '<code>'..invalidCode..'</code> is not a valid language code.'  
else  
errorText = '<code>'..codes..'</code> is not a valid language or script code.'  
end  
if not scriptCode or scriptCode == "" then  
scriptCode = require("Module:Unicode data").is_Latin(text) and "Latn" or "unknown"  
end  
if errorText then  
errorText = ' <span>[' .. errorText .. ']</span>'  
else  
errorText = ""  
end  
languageCode = m_data.redirects[languageCode] or languageCode  
return languageCode, scriptCode, errorText  
end  

local function tag(text, languageCode, script, italics)  
local data = langData[languageCode]  
-- Use Wikipedia code if it has been given: for instance,  
-- Proto-Indo-European has the Wiktionary code "ine-pro" but the Wikipedia  
-- code "ine-x-proto".  
languageCode = data and data.Wikipedia_code or languageCode  

local italicize = script == "Latn" and italics  

if not text then text = "[text?]" end  

local textDirectionMarkers = { "", "", "" }  
if data and data["direction"] == "rtl" then  
textDirectionMarkers = { ' dir="rtl"', '&rlm;', '&lrm;' }  
end  

local out = { textDirectionMarkers[2] }  
if italicize then  
table.insert(out, "<i lang=\"" .. languageCode .. "\"" .. textDirectionMarkers[1] .. ">" .. text .. "</i>")  
else  
table.insert(out, "<span lang=\"" .. languageCode .. "\"" .. textDirectionMarkers[1] .. ">" .. text .. "</span>")  
end  
table.insert(out, textDirectionMarkers[3])  

return table.concat(out)  
end  

function p.lang  
local parent = :getParent  
local args = parent.args[1] and parent.args or .args  

local codes = args[1] and mw.text.trim(args[1])  
local text = args[2] or error("Provide text in the second parameter")  

local languageCode, scriptCode, errorText = getCodes(codes, text)  

local italics = args.italics or args.i or args.italic  
italics = not (italics == "n" or italics == "-" or italics == "no")  

return tag(text, languageCode, scriptCode, italics) .. errorText  
end  

local function linkToWiktionary(entry, linkText, languageCode)  
local data = langData[languageCode]  
local name  
if languageCode then  
if data and data.name then  
name = data.name  
else  
-- On other languages' wikis, use mw.getContentLanguage:getCode,  
-- or replace 'en' with that wiki's language code.  
name = mw.language.fetchLanguageName(languageCode, 'en')  
if name == "" then  
error("Name for the language code " .. ("%q"):format(languageCode or nil)  
.. " could not be retrieved with mw.language.fetchLanguageName, "  
.. "so it should be added to Module:Language/data")  
end  
end  
if entry:sub(1, 1) == "*" then  
if name ~= "" then  
entry = "Reconstruction:" .. name .. "/" .. entry:sub(2)  
else  
error("Language name is empty")  
end  
elseif data and data.type == "reconstructed" then  
mw.log("Reconstructed language without asterisk:", languageCode, name, entry)  
local = mw.getCurrentFrame  
-- Track reconstructed entries with no asterisk by transcluding  
-- a nonexistent template. This technique is used in Wiktionary:  
-- see wikt:Module:debug.  
-- Special:WhatLinksHere/tracking/wikt-lang/reconstructed with no asterisk  
pcall(.expandTemplate, ,  
{ title = 'tracking/wikt-lang/reconstructed with no asterisk' })  
if name ~= "" then  
entry = "Reconstruction:" .. name .. "/" .. entry  
else  
error("Language name is empty")  
end  
elseif data and data.type == "appendix" then  
if name ~= "" then  
entry = "Appendix:" .. name .. "/" .. entry  
else  
error("Language name is empty")  
end  
end  
if entry and linkText then  
return "" .. linkText .. ""  
else  
error("linkToWiktionary needs a Wiktionary entry or link text, or both")  
end  
else  
return "" .. linkText .. ""  
end  
end  

function p.wiktlang  
local parent = :getParent  
local args = parent.args[1] and parent.args or .args  

local codes = args[1] and mw.text.trim(args[1])  
local word1 = ifNotEmpty(args[2])  
local word2 = ifNotEmpty(args[3])  

if not args[2] then  
error("Parameter 2 is required")  
end  

local languageCode, scriptCode, errorText = getCodes(codes, word2 or word1)  

local italics = args.italics or args.i or args.italic  
italics = not (italics == "n" or italics == "-" or italics == "no")  

local entry, linkText  
if word2 and word1 then  
entry = makeEntryName(word1, languageCode)  
linkText = word2  
elseif word1 then  
entry = makeEntryName(word1, languageCode)  
linkText = word1  
end  

local out  
if languageCode and entry and linkText then  
out = tag(linkToWiktionary(entry, linkText, languageCode), languageCode, scriptCode, italics)  
elseif entry and linkText then  
out = linkToWiktionary(entry, linkText)  
else  
out = '<span>[text?]</span>'  
end  

if out and errorText then  
return out .. errorText  
else  
return errorText or error("The function wiktlang generated nothing")  
end  
end  

function p.wikt  
local parent = :getParent  
local args = parent.args[1] and parent.args or .args  

local codes = args[1] and mw.text.trim(args[1])  
local word1 = ifNotEmpty(args[2])  
local word2 = ifNotEmpty(args[3])  

if not word1 then  
error("Provide a word in parameter 2.")  
end  

local languageCode, scriptCode, errorText = getCodes(codes, word1)  

local entry, linkText  
if word2 and word1 then  
entry = makeEntryName(word1, languageCode)  
linkText = word2  
elseif word1 then  
entry = makeEntryName(word1, languageCode)  
linkText = word1  
end  

local out  
if languageCode and entry and linkText then  
out = linkToWiktionary(entry, linkText, languageCode)  
elseif entry and linkText then  
out = linkToWiktionary(entry, linkText)  
else  
out = '<span>[text?]</span>'  
end  

if out and errorText then  
return out and out .. errorText  
else  
return errorText or error("The function wikt generated nothing")  
end  
end  

return p