Module:RootFinder

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

local p = {}

local function get_root_language(language)
    local parent_prop = "Is Variety Of"

    while true do
        local query = "[[" .. language .. "]]|?" .. parent_prop
        local result = mw.smw.ask{ query }

        if result and result[language] and result[language][parent_prop] then
            language = result[language][parent_prop]
        else
            break
        end
    end

    return language
end

function p.tree(frame)
    local current_language = mw.title.getCurrentTitle().text
    local root_language = get_root_language(current_language)

    local query = string.format(
        '[[%s]] [[Category:Language]] |format=tree |parent=Is Variety Of |limit=5000',
        root_language
    )

    return frame:preprocess('{{#ask:' .. query .. '}}')
end

return p