Module:RaritySort

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

local p = {}

function p.getSortValue(frame)
    local rarity = frame.args[1]

    if rarity == nil or type(rarity) ~= "string" then
        return 99
    end

    -- Remove leading ~ if present
    rarity = mw.text.trim(rarity)
    if rarity:sub(1, 1) == "~" then
        rarity = rarity:sub(2)
    end

    local lowered = string.lower(rarity)

    -- Normalize aliases
    if lowered == "1" then
        lowered = "always"
    end

    -- Final sort logic
    if lowered == "always" then
        return 1
    elseif lowered:match("^1/%d+$") then
        return 2
    elseif lowered == "rare" then
        return 3
    elseif lowered == "never" then
        return 4
    else
        return 99
    end
end

return p