Module:MyTranslationModule/sandbox

This is the module sandbox page for Module:MyTranslationModule (diff).
local p = {}

local rtl_langs = {
    ar = true, he = true, fa = true, ur = true,
    ps = true, prs = true, syr = true, ckb = true,
}

local function is_rtl(code)
    if not code then return false end
    code = mw.ustring.lower(mw.text.trim(code))
    return rtl_langs[code] or false
end

local function build_cell(text, code)
    if not text then text = "" end
    if not code then return string.format("| %s", text) end

    local dir = is_rtl(code) and "rtl" or "ltr"
    return string.format('| style="direction:%s;" lang="%s" | %s', dir, code, text)
end

function p.render(frame)
    local args = frame:getParent().args
    local code1 = args["lang1code"]
    local code2 = args["lang2code"]

    -- Get names from lang1/lang2 or fall back to code conversion
    local lang1 = args["lang1"]
    local lang2 = args["lang2"]

    if not lang1 and code1 then
        lang1 = frame:expandTemplate{title = "ISO 639 name", args = {code1}}
    end
    if not lang2 and code2 then
        lang2 = frame:expandTemplate{title = "ISO 639 name", args = {code2}}
    end

    if not lang1 or not lang2 then
        return "Error: You must specify either language names or codes."
    end

    local output = {}
    table.insert(output, '{| class="wikitable sortable"')
    table.insert(output, string.format("! %s !! %s", lang1, lang2))

    -- Named parameters: text1/trans1...
    local i = 1
    while true do
        local text = args["text" .. i]
        local trans = args["trans" .. i]
        if not text and not trans then break end
        table.insert(output, "|-")
        table.insert(output, build_cell(text, code1))
        table.insert(output, build_cell(trans, code2))
        i = i + 1
    end

    -- Positional args: from 3 onwards
    local index = 3
    while true do
        local text = args[index]
        local trans = args[index + 1]
        if not text and not trans then break end
        table.insert(output, "|-")
        table.insert(output, build_cell(text, code1))
        table.insert(output, build_cell(trans, code2))
        index = index + 2
    end

    table.insert(output, "|}")
    return table.concat(output, "\n")
end

return p