Module:languages/templates

This module provides access to Module:languages from templates, so that they can make use of the information stored there.

Usage

If you know a language's code (for example, "en") and you want to find out its canonical name, you can use this:

{{#invoke:languages/templates|getByCode|en|getCanonicalName}} (returns "English")

If you know a language's canonical name (for example, "English") and you want to find out its code, use this:

{{#invoke:languages/templates|getByCanonicalName|English}} (returns "en")

Both of these functions are subst:able (type {{subst:#invoke:...).

Exported functions

exists

{{[[Template:#invoke:languages/templates|#invoke:languages/templates]]|exists|language code}}

Check whether a language code exists and is valid. It will return "1" if the language code exists, and the empty string "" if it does not.

This is rarely needed, because a script error will result when someone uses a code that is not valid, so you do not need this just to check for errors. However, in case you need to decide different actions based on whether a certain parameter is a language code or something else, this function can be useful.

getByCode

{{[[Template:#invoke:languages/templates|#invoke:languages/templates]]|getByCode|language code|item to look up|index}}

Queries information about a language code.

The language code should be one of the codes that is defined in Module:languages data. If it is missing or does not exist, the result will be a script error.
The item is the name of one of the functions of a language object, such as getCanonicalName or getScripts. If no item has been provided, the result will be a script error.
The index is optional, and is used for items that are lists, such as getOtherNames or getScripts. It selects which item in the list to return. On items that are single strings, like getFamily, it has no effect. If an index is given that is higher than the number of items in the list, the result will be an empty string.

For example, to request the canonical name of the language whose code is en:

{{#invoke:languages/templates|getByCode|en|getCanonicalName}}

Result: English

To request its second name, if any:

{{#invoke:languages/templates|getByCode|en|getOtherNames|1}}

Result: Modern English

To request its family:

{{#invoke:languages/templates|getByCode|en|getFamily}}

Result: gmw

getByCanonicalName

{{[[Template:#invoke:languages/templates|#invoke:languages/templates]]|getByCanonicalName|language name}}

Gets the language code corresponding to a canonical name.

{{[[Template:#invoke:languages/templates|#invoke:languages/templates]]|getByCanonicalName|English}}

↓

en

getCanonicalName

{{[[Template:#invoke:languages/templates|#invoke:languages/templates]]|getCanonicalName|language code}}

Gets the canonical name for a language code if the language code is valid, or else returns an empty string. It uses a table that converts language code to canonical name, generated by Module:languages/code to canonical name. Requires more Lua memory than getByCode (about 10 megabytes) for a single instance, but may require less memory on pages that call the function many times.

Unlike {{[[Template:#invoke:languages/templates|#invoke:languages/templates]]|getByCode|<language_code>|getCanonicalName}}, this function does does not yield a script error for an invalid language code.

{{[[Template:#invoke:languages/templates|#invoke:languages/templates]]|getCanonicalName|en}}

{{[[Template:#invoke:languages/templates|#invoke:languages/templates]]|getCanonicalName|invalid code}}

↓

English

local export = {}

function export.exists(frame)
	local args = frame.args
	local lang = args[1] or error("Language code has not been specified. Please pass parameter 1 to the module invocation.")
	
	lang = require("Module:languages").getByCode(lang)
	
	if lang then
		return "1"
	else
		return ""
	end
end

-- Used by the following JS:
-- * [[WT:ACCEL]]
-- * [[WT:EDIT]]
-- * [[WT:NEC]]
function export.getByCode(frame)
	local args = frame.args
	local langcode = args[1] or error("Language code has not been specified. Please pass parameter 1 to the module invocation.")
	local itemname = args[2] or error("Type of information to look up has not been specified. Please pass parameter 2 to the module invocation.")
	
	local lang = require("Module:languages").getByCode(langcode)
	
	if not lang then
		error("The language code '" .. langcode .. "' is not valid.")
	end
	
	
	-- The item that the caller wanted to look up
	
	if itemname == "getOtherNames" then
		local index = args[3]; if index == "" then index = nil end
		index = tonumber(index) or error("Please specify the numeric index of the desired name.")
		return lang:getOtherNames()[index] or ""
	elseif itemname == "getFamily" then
		return lang:getFamily():getCode()
	elseif itemname == "getWikimediaLanguages" then
		local index = args[3]; if index == "" then index = nil end
		index = tonumber(index) or error("Please specify the numeric index of the desired language.")
		local langs = lang:getWikimediaLanguages()
		
		if langs[index] then
			return langs[index]:getCode()
		else
			return ""
		end
	elseif itemname == "getScripts" then
		local index = args[3]; if index == "" then index = nil end
		index = tonumber(index) or error("Please specify the numeric index of the desired script.")
		local scripts = lang:getScriptCodes()
		
		if scripts[index] then
			return scripts[index]
		else
			return ""
		end
	elseif itemname == "getAncestors" then
		local index = args[3]; if index == "" then index = nil end
		index = tonumber(index) or error("Please specify the numeric index of the desired ancestor.")
		local ancestors = lang:getAncestors()
		
		if ancestors[index] then
			return ancestors[index]:getCode()
		else
			return ""
		end
	elseif itemname == "transliterate" then
		local text = args[3]; if text == "" then text = nil end
		local sc = args[4]; if sc == "" then sc = nil end
		local module_override = args[5]; if module_override == "" then module_override = nil end
		sc = (sc and (require("Module:scripts").getByCode(sc) or error("The script code \"" .. sc .. "\" is not valid.")) or nil)
		return lang:transliterate(text, sc, module_override) or ""
	elseif itemname == "makeEntryName" then
		local text = args[3]; if text == "" then text = nil end
		return lang:makeEntryName(text) or ""
	elseif itemname == "makeSortKey" then
		local text = args[3]; if text == "" then text = nil end
		return lang:makeSortKey(text) or ""
	elseif lang[itemname] then
		local ret = lang[itemname](lang)
		
		if type(ret) == "string" then
			return ret
		else
			error("The function \"" .. itemname .. "\" did not return a string value.")
		end
	else
		error("Requested invalid item name \"" .. itemname .. "\".")
	end
end

function export.getByCanonicalName(frame)
	local args = frame.args
	local langname = args[1] or error("Language name has not been specified. Please pass parameter 1 to the module invocation.")
	
	local lang = require("Module:languages").getByCanonicalName(langname)
	
	if lang then
		return lang:getCode()
	else
		return ""
	end
end

function export.getByName(frame)
	local args = frame.args
	local langname = args[1] or error("Language name has not been specified. Please pass parameter 1 to the module invocation.")
	
	local lang = require("Module:languages").getByName(langname)
	
	if lang then
		return lang:getCode()
	else
		return ""
	end
end

function export.makeEntryName(frame)
	local args = frame.args
	local langname = args[1] or error("Language name has not been specified. Please pass parameter 1 to the module invocation.")
	
	local lang = require("Module:languages").getByCode(langname)
	
	if lang then
		return lang:makeEntryName(args[2])
	else
		return ""
	end
end

function export.getCanonicalName(frame)
	local langCode = frame.args[1]
	
	if not langCode or langCode == "" then
		error("Supply a language code in parameter 1.")
	end
	
	local canonicalNames = mw.loadData("Module:languages/code to canonical_name")
	
	return canonicalNames[langCode] or ""
end

return export