Module:RootFinder

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

local p = {}

function p.getRootLanguage(frame)
    local startTitle = frame.args[1] -- Expect a plain string as input (e.g., via {{PAGENAME}})
    if not startTitle or startTitle == "" then
        return "Error: No start title provided"
    end

    local title = startTitle
    local prop = "Is Variety Of"

    mw.log("Starting root language search for: " .. title)

    while true do
        -- Perform a semantic query to get the parent language
        local queryResult = mw.smw.ask{"[[" .. title .. "]]|?" .. prop}

        -- Log the query result
        mw.log("Query result for " .. title .. ": " .. mw.text.jsonEncode(queryResult))

        -- Ensure queryResult is valid and extract the first parent
        local parent = nil
        if queryResult and type(queryResult) == "table" then
            for _, row in pairs(queryResult) do
                if row[prop] then
                    if type(row[prop]) == "table" then
                        parent = row[prop][1] -- Take the first value if it's a list
                    else
                        parent = row[prop]
                    end
                    mw.log("Found parent: " .. parent)
                end
                break -- Only need the first row
            end
        end

        -- If no parent is found, return the current title as root
        if not parent or parent == "" then
            mw.log("Root language found: " .. title)
            return title
        end

        -- Move up to the parent language
        title = parent
    end
end

return p