xyzshop/helper/bonus/generator.php

<?php
/**
 * Created by PhpStorm.
 * User: stanley-king
 * Date: 16/4/10
 * Time: 下午9:42
 */

namespace bonus;

use \Exception;
use \errcode;
use \Model;
use \Log;

abstract class IGenerator
{
    protected $mType;
    public function __construct($type) {
        $this->mType = $type;
    }

    abstract public function make_bonus();
    public function make_type()
    {
        $this->mType->setType_sn(make_sn());
        $param = $this->mType->get_param();
        $id = Model('bonus_type')->add($param);
        if($id > 0) {
            $this->mType->setType_id($id);
        } else {
            throw new Exception("生成红包类型失败",errcode::ErrBonusMake);
        }
    }
    public function type_sn() {
        return $this->mType->getType_sn();
    }
}
//发给指定人群的红包
class DirectGenerator extends IGenerator
{
    public function __construct($type) {
        parent::__construct($type);
    }

    public function make_bonus()
    {

    }
}

//发个任意人群的红包
class GeneralGenerator extends IGenerator
{
    public function __construct($type) {
        parent::__construct($type);
    }

    public function make_bonus()
    {
        $mod_bonus = Model('user_bonus');
        $paramer = $this->mType->get_param();
        $type_id = $this->mType->getType_id();
        $total_num = $this->mType->getTotal_num();
        $type_sn = $this->mType->getType_sn();

        if($this->mType->isRandomAmount())
        {
            $moneys = $this->separate_money($paramer,$min_val,$max_val);
            Model('bonus_type')->edit(array('type_id' => $type_id),array('min_amount' => $min_val,'max_amount' => $max_val));

            foreach($moneys as $val)
            {
                $datas = array('bonus_sn' => make_sn(),
                    'bonus_value' => $val,
                    'type_id' => $type_id,
                    'status' => 0,
                    'type_sn' => $type_sn);
                $ret = $mod_bonus->add($datas);
                if($ret <= 0) {
                    Log::record("insert user_bonus err: {$type_id}.");
                    return false;
                }
            }
        }
        else
        {
            $val =  $paramer['fixed_money'];
            for($i = 0; $i < $total_num; $i++) {
                $datas = array( 'bonus_sn' => make_sn(),
                    'bonus_value' => $val,
                    'type_id' => $type_id,
                    'status' => 0,
                    'type_sn' => $type_sn);

                $ret = $mod_bonus->add($datas);
                if($ret <= 0) {
                    Log::record("insert user_bonus err: {$type_id}.");
                    return false;
                }
            }
        }

        return true;
    }

    /**
     * @param $paramer
     */
    private function separate_money($paramer,&$min_val,&$max_val)
    {
        $min_amount = floatval($paramer['min_amount']) * 100;
        $base_amount = $min_amount;

        $num = intval($paramer['total_num']);
        $total_amount = floatval($paramer['total_amount']) * 100 - $num * $base_amount;

        $ret = array();
        for ($i = 0; $i < $num; $i++) {
            array_push($ret,$base_amount);
        }

        $max_amount = $total_amount;
        $max_val = 0;
        for ($i = 0; $i < $num && $total_amount > 0;)
        {
            $amount = mt_rand(0, $max_amount);

            $ret[$i] += $amount;
            $total_amount -= $amount;
            $max_val = $ret[$i] > $max_val ? $ret[$i] : $max_val;
            $max_amount = $total_amount;

            if($i == $num -1) {
                $i = 0;
            } else {
                $i++;
            }
        }

        //$y = array_sum($ret); //验证制造的数据是否可以正好相等
        $max_val = $max_val / 100;
        $min_val = $ret[0];
        foreach ($ret as &$val) {
            $min_val = $min_val > $val ? $val : $min_val;
            $val = $val / 100;
        }
        $min_val = $min_val / 100;

        return $ret;
    }
}


function create_generator($type)
{
    if($type->isDirectType()) {
        return new DirectGenerator($type);
    }
    else if($type->isGeneralType()) {
        return new GeneralGenerator($type);
    }
    else {
        throw new Exception("错误的红包类型",errcode::ErrBonusType);
    }
}