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 queryString = string.format('[[%s]]|?%s', title, prop)
        mw.log(queryString)
        local queryResult = mw.smw.getQueryResult(queryString)

        -- 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 k,v in pairs( queryResult.results ) do
        		mw.log(mw.text.jsonEncode(v))
        		if v.printouts then
        			mw.log("Printout: " .. mw.text.jsonEncode(v.printouts))
	            	if v.printouts["Is Variety Of"] and  #v.printouts["Is Variety Of"] > 0 and v.printouts["Is Variety Of"][1].fulltext then
	            	  parent = v.printouts["Is Variety Of"][1].fulltext
	            	end
            	end
        	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