Mô đun:British regnal year

-- This module implements {{British regnal year}}. It converts a year in the Gregorian-- calendar to the equivalent English or British regnal year.local data = mw.loadData( 'Module:British regnal year/data' )local p = {}function p.main( frame )    -- If we are being called from #invoke, then the year is the first positional    -- argument. If not, it is the frame parameter.    local inputYear    if frame == mw.getCurrentFrame() then        inputYear = frame:getParent().args[ 1 ]        local frameArgsYear = frame.args[ 1 ]        if frameArgsYear then            inputYear = frameArgsYear        end    else        inputYear = frame    end    -- Convert the input to an integer if possible. Return "N/A" if the input could    -- not be converted, or if the converted input is too big or too small.    if type( inputYear ) ~= 'number' then        inputYear = tonumber( inputYear )    end    if not inputYear then        return "''N/A''"    end    local currentYear = tonumber( mw.language.getContentLanguage():formatDate( 'Y' ) )    if inputYear < 1066 or inputYear > currentYear then        return "''N/A''"    end        -- Find the year in the data page and display the output.    for _, t in ipairs( data ) do        local dataYear = t.year        if inputYear >= dataYear then            -- Get data values from the data page.            local startYear = t.startYear            local currentRegnalYear = inputYear - dataYear + startYear            local linkCurrent = t.linkCurrent            local prevEndYear = t.prevEndYear            local linkPrev = t.linkPrev            local note = t.note            if inputYear > dataYear then                -- Years with the same monarch.                return mw.ustring.format(                    '%d&nbsp;%s&nbsp;–&nbsp;%d&nbsp;%s%s',                    currentRegnalYear - 1, linkCurrent, currentRegnalYear, linkCurrent, note or ''                )            elseif inputYear == dataYear and prevEndYear and linkPrev then                -- Years with a different monarch.                return mw.ustring.format(                    '%d&nbsp;%s&nbsp;–&nbsp;%d&nbsp;%s%s',                    prevEndYear, linkPrev, currentRegnalYear, linkCurrent, note or ''                )            else                -- This should only match the year 1066.                return mw.ustring.format(                    '%d&nbsp;%s%s',                    currentRegnalYear, linkCurrent, note or ''                )            end        end    endendreturn p