Module:CHUNITHM Difficulty

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

local p={}
local function VerToNum(args)
	return tonumber(mw.text.trim(mw.getCurrentFrame():expandTemplate{title='VerToNum',args=args}))
end

function p.chunithm_difficulty_multi(frame)
    args=frame:getParent().args
    local version_range_borders = {4,13,18}
    local result = "CHUNITHM "
    if VerToNum({"chunithm", args[1]}) < version_range_borders[1] then
        result = result .. "to AIR difficulty rated from 1 to 13+, "
    else
        result = result .. "difficulty rated "
    end
    -- since #args can't be used, and there's no removals in air+ and older anyway, i'm removing the period, and moving the comma to the above branch
    -- although there's only two ranges, the loops below shall remain to be future-proof
    local i = 0
    local in_range = {}
    for i = 1, #version_range_borders do
        in_range[i] = false
    end
    local ranges_text = {
        "1 to 14 from AIR PLUS to PARADISE LOST",
        "1 to 15 from NEW to LUMINOUS",
        "1 to 15+ from LUMINOUS PLUS onwards"
    }
    local j = 1
    local endvernum = nil
    for i = 1, 99, 2 do -- again, ugly hack
        if args[i] == nil then break end
        local startvernum = VerToNum({"chunithm", args[i]})
        endvernum = VerToNum({"chunithm", args[i + 1]})
        if endvernum == nil then
            endvernum = 99
        end
        for j = 1, #version_range_borders do
            local cond = true
            if j + 1 <= #version_range_borders then
                cond = startvernum < version_range_borders[j + 1]
            end
            if endvernum >= version_range_borders[j] and cond then
                in_range[j] = true
            end
        end
    end
    local included_ranges = {}
    for j = 1, #in_range do
        if in_range[j] then
            table.insert(included_ranges, j)
        end
    end
    if #included_ranges == 1 and VerToNum({"chunithm", args[1]}) < version_range_borders[1] then -- first range special case
        result = result .. "and " .. ranges_text[included_ranges[1]] .. "."
        -- print(result)
    else
        for j = 1, #included_ranges do
            result = result .. ranges_text[included_ranges[j]]
            if j == #included_ranges then -- last range
                result = result .. "."
            elseif j == #included_ranges - 1 then -- second to last range
                result = result .. ", and "
            else
                result = result .. ", "
            end
        end
    end
    result = result .. "<br>[[Category:Songs]][[Category:CHUNITHM Songs]]"
    if endvernum ~= 99 then
        result = result .. "[[Category:CHUNITHM Removed Songs]]"
    end
    return result
end

return p