xyzshop/helper/bonus/RateMoney.php

<?php
/**
 * Created by PhpStorm.
 * User: stanley-king
 * Date: 2018/8/24
 * Time: 下午6:35
 */

namespace bonus;

class RateMoney implements IMoneyCalc
{
    const ASC = 1;
    const DESC = 2;
    const PRED_RATE = 30;
    private $mRates;
    private $mDirty;

    public function __construct($rates)
    {
        $this->mDirty = false;

        $this->mRates = [];
        foreach ($rates as $key => $val) {
            $val = intval(100 * $val + 0.5);
            if ($val > 0) {
                $this->mRates[$key] = $val / 100;
            }
        }
        krsort($this->mRates);
    }

    public function add_bonuses($items)
    {
        foreach ($items as $item) {
            $bonus = user_bonus::create_by_param($item);
            $rate = $bonus->bonus_rate();
            $amount = intval($bonus->remain_amount() * 100 + 0.5);

            if ($amount <= 0) continue;

            $this->mDirty = true;
            if (isset($this->mRates[$rate]) == false) {
                $this->mRates[$rate] = 0.00;
            }
            $this->mRates[$rate] += $bonus->remain_amount();
        }
        krsort($this->mRates);
    }

    public function resort()
    {
        krsort($this->mRates);
    }

    public function is_enough(&$rate, $amount)
    {
        $amount = intval($amount * 100 + 0.5);
        foreach ($this->mRates as $key => $val)
        {
            $val = intval($val * 100 + 0.5);
            if ($rate == -1) {
                if ($val >= $amount) {
                    $rate = $key;
                    return true;
                }
            }
            elseif ($rate == $key)
            {
                $rate = $key;
                if ($val >= $amount) {
                    return true;
                } else {
                    return false;
                }
            }
        }

        return false;
    }

    public function with_hold($rate, $amount)
    {
        if (isset($this->mRates[$rate])) {
            $this->mDirty = true;
            $this->mRates[$rate] = $this->mRates[$rate] - $amount;
        }
    }

    public function find_rate($amount)
    {
        if (empty($this->mRates)) return false;

        $rates = $this->mRates;
        ksort($rates);
        foreach ($rates as $rate => $money) {
            $money = intval($money * 100 + 0.5);
            $amount = intval($amount * 100 + 0.5);
            if ($amount >= $money) {
                return ['rate' => $rate, 'amount' => $money / 100];
            } else {
                return ['rate' => $rate, 'amount' => $amount / 100];
            }
        }

        return false;
    }

    public function format()
    {
        $result = [];
        foreach ($this->mRates as $key => $val) {
            $val = intval($val * 100 + 0.5);
            if ($val > 0) {
                $result[$key] = $val / 100;
            }
        }
        return $result;
    }

    public function total()
    {
        $total = 0.00;
        foreach ($this->mRates as $key => $amount) {
            $total += $amount;
        }
        return $total;
    }

    public function dirty()
    {
        return $this->mDirty;
    }

    public function clean()
    {
        $this->mDirty = false;
    }

    public function calc_rates($amount)
    {
        $rates = [];

        $left = intval($amount * 100 + 0.5);
        foreach ($this->mRates as $rate => $total) {
            if ($left <= 0) break;
            if ($rate > 100) continue;

            $total = intval($total * 100 + 0.5);
            if ($total <= 0) {
                continue;
            } else {
                if ($total >= $left) {
                    $rates[$rate] = $left / 100;
                    $left = 0;
                } else {
                    $rates[$rate] = $total / 100;
                    $left -= $total;
                }
            }
        }
        return $rates;
    }

    public function calc_money($price, &$rates)
    {
        $rates = [];
        $disc = 0;
        $left = intval($price * 100 + 0.5);
        foreach ($this->mRates as $rate => $total) {
            if ($left <= 0) break;
            if ($rate > 100) continue;

            $total = intval($total * 100 + 0.5);
            if ($total <= 0) {
                continue;
            } else {
                $max_rate = intval($left * $rate / 100 + 0.5);
                if ($total >= $max_rate) {
                    $disc += $max_rate;
                    $left = 0;
                    $rates[$rate] = $max_rate / 100;
                } else {
                    $disc += $total;
                    $left -= intval($total * 100 / $rate + 0.5);
                    $rates[$rate] = $total / 100;
                }
            }
        }
        $cur_price = intval($price * 100 + 0.5) - $disc;
        return $cur_price / 100;
    }

    public function calc_price($price, &$rates)
    {
        $cur_price = intval($this->calc_money($price, $rates) * 100 + 0.5);
        return $cur_price / 100;
    }

    static function scale()
    {
        return (100 - self::PRED_RATE) / 100;
    }
}