Module:LocGetString

Documentation for this module may be created at Module:LocGetString/doc

local p = {}
local langCache = {}  -- кеш по языкам
local revEnCache = nil -- кеш терминов
local DEBUG = false  -- true - if testing

local function getLangData(lang)
    if langCache[lang] then return langCache[lang] end

    local title = mw.title.new("Data:LocStrings/" .. lang .. ".json")
    local content = title and title:getContent() or ""
    if content == "" then
        langCache[lang] = {}
        return langCache[lang]
    end

    local ok, data = pcall(mw.text.jsonDecode, content)
    if not ok or type(data) ~= "table" then
        langCache[lang] = {}
        return langCache[lang]
    end

    local tokens = {}
    local tokenList = data.tokens or {}
    for _, item in ipairs(tokenList) do
        if item.sid and item.text then
            tokens[item.sid] = item.text
        end
    end

    langCache[lang] = tokens
    return tokens
end

local function buildRevEn()
    if revEnCache then return revEnCache end
    local MAX_LEN = 50  -- only shorts strings
    revEnCache = {}
    for sid, text in pairs(getLangData("en")) do
        if #text <= MAX_LEN then
            revEnCache[text] = sid
        end
    end
    return revEnCache
end



function p.getText(frame)
    local sid = frame.args["sid"] or frame.args[1]
    local lang = frame.args["lang"] or "en"

    if not sid then 
        return DEBUG and "No sid provided" or "" 
    end

    local tokens = getLangData(lang)
    local text = tokens[sid]

    -- fallback на английский
    if not text and lang ~= "en" then
        text = getLangData("en")[sid]
    end

    if not text then
        return DEBUG and ("SID not found: " .. sid) or ""
    end

    return text
end


function p.translate(frame)
    local textEn = frame.args.text or frame.args[1]
    local lang   = frame.args.lang or "en"

    if not textEn or #textEn == 0 or #textEn > 50 then
        return textEn or ""
    end

    if lang == "en" then return textEn end

    local sid = buildRevEn()[textEn]
    if not sid then return textEn end

    return getLangData(lang)[sid] or textEn
end

return p