Module:Fallback

--[[

 __  __           _       _        _____     _ _ _                _
|  \/  | ___   __| |_   _| | ___ _|  ___|_ _| | | |__   __ _  ___| | __
| |\/| |/ _ \ / _` | | | | |/ _ (_) |_ / _` | | | '_ \ / _` |/ __| |/ /
| |  | | (_) | (_| | |_| | |  __/_|  _| (_| | | | |_) | (_| | (__|   < 
|_|  |_|\___/ \__,_|\__,_|_|\___(_)_|  \__,_|_|_|_.__/ \__,_|\___|_|\_\

Authors and maintainers:

• User:Zolo - original version
• User:Jarekt

]]

local p = {}

--[[ translatelua

Allows easy translation or internalization of pages in Lua.

Example Usage from a template:

Parameters:

 frame.args.1 - name of translation module

frame.args.2 - field name of the structure in Module:[frame.args.1] to use

 frame.args.lang - desired language (often user's native language)

Error Handling:

]] function p.translatelua(frame) local lang = mw.text.trim(frame.args.lang) local page = require('Module:' .. mw.text.trim(frame.args[1])) -- page should only contain a simple of translations if not lang or lang == then lang = frame:callParserFunction("int", "lang") end if frame.args[2] then page = page[mw.text.trim(frame.args[2])] end

local langList = mw.language.getFallbacksFor(lang) table.insert(langList,1,lang) for _,language in ipairs(langList) do if page[language] then return page[language] end end end

--[[ fblist

Similar to mw.language.getFallbacksFor(lang) but uses Commons old fallback chain

Parameters:

 lang - desired language (often user's native language)

Error Handling:

]] function p.fblist(lang) -- list the full fallback chain from a language to en local fbtable = p.fallbackloop{lang:lower()} table.insert(fbtable, 'default') table.insert(fbtable, 'en') return fbtable end

local function _inArray(x, t) for i, v in ipairs(t) do if v == x then return i end end return -1 end

function p.fallbackloop(fbtable) --list of fallback languages in string format (more convenient than tables) local langlist = require('Module:Fallbacklist') local changes = false for i, j in ipairs(fbtable) do local seq = langlist[j] if seq then for k, l in ipairs(seq) do if _inArray(l, fbtable) == -1 then table.insert(fbtable, l) changes = true end end end end if changes then return p.fallbackloop(fbtable) end return fbtable end

return p