Module:Date

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

local yesno = require('Module:Yesno')

local p = {}

local function is_empty(s)
    return s == nil or s == ''
end

function p.link(year, suffix)
    local s, name, page
    if year > 0 then
        s = tostring(year)
        name = suffix and (s .. " ᴀᴄ") or s
        page = mw.title.makeTitle(0, s .. " AC")
        if not page.exists then
            page = mw.title.makeTitle(
                    0,
                    "Years after Aegon's Conquest",
                    "Year " .. s .. " After the Conquest"
                )
        end
    elseif year < 0 then
        s = tostring(math.abs(year))
        name = suffix and (s .. "&nbsp;ʙᴄ") or s
        page = mw.title.makeTitle(0, s .. " BC")
        if not page.exists then
            page = mw.title.makeTitle(
                    0,
                    "Years before Aegon's Conquest",
                    "Year " .. s .. " Before the Conquest"
                )
        end
    end
    return "[[" .. page.fullText .. "|" .. name .. "]]"
end

function p.nolink(year, suffix)
    local s = tostring(year)
    if year > 0 then
        return suffix and (s .. "&nbsp;ᴀᴄ") or s
    elseif year < 0 then
        s = tostring(math.abs(year))
        return suffix and (s .. "&nbsp;ʙᴄ") or s
    end
end

function p.main(frame)
    local pargs = frame:getParent().args
    local cargs = frame.args
    
    local y1 = tonumber(pargs[1]) or tonumber(cargs[1])
    local y2 = tonumber(pargs[2]) or tonumber(cargs[2])
    local suffix = yesno(pargs.suffix)
    if suffix == nil then suffix = yesno(cargs.suffix) end
    if suffix == nil then suffix = true end
    
    if y2 == nil then
        return p.link(y1, suffix)
    elseif (y1 > 0) == (y2 > 0) then
        return p.link(y1, false) .. "–" .. p.link(y2, true)
    else
        return p.link(y1, true) .. "&nbsp;– " .. p.link(y2, true)
    end
end

return p