TimeEnvelope.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Collections.Generic;

internal class TimeEnvelope
{
    private int _count;
    private int _time = 0;
    private bool _throwOnOverflow;

    public static void AddTime(IEnumerable<TimeEnvelope> envelopes, int value)
    {
        foreach (var envelope in envelopes)
        {
            envelope.AddTime(value);
        }
    }

    public TimeEnvelope(int count, bool throwOnOverflow = true)
    {
        _count = count;
        _throwOnOverflow = throwOnOverflow;
    }

    public int Count
    {
        get
        {
            return _count;
        }
    }

    public int Time
    {
        get
        {
            return _time;
        }
    }

    public int AddTime(int value)
    {
        _time += value;
        if (_time == _count)
        {
            _time = 0;
        }
        else if (_throwOnOverflow && _time > _count)
        {
            throw new Exception("TimeEnvelope count overflowed!");
        }

        return _time;
    }

    public bool IsFirstMultiple(int value)
    {
        return _time == value;
    }

    public bool IsLastMultiple(int value)
    {
        return _count - value == _time;
    }

    public bool IsMultiple(int value)
    {
        return _time % value == 0;
    }
}