我在 Google 上查看了一些关于此的示例/解决方案,例如创建折扣代码系统 (MySQL/php),但我还没有找到一个好的解决方案。
我的情况是,我有一个平台,用户应该有一个虚拟货币余额,并且可以为它购买虚拟物品。现在希望实施代金券和折扣。会有不同类型的代码,例如购买商品可享受 50% 折扣的代码、x 数量的额外商品(有或没有最低商品数量)、只是获得一些货币的代码或为推荐人提供某些东西的参考代码.
我已将其实现为 Campaign 和 CampaignType,其中首先保存活动信息,然后保存操作信息。
这是结构:
-- Table structure for table `cake_campaigns`
CREATE TABLE IF NOT EXISTS `cake_campaigns` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`name` varchar(50) CHARACTER SET utf8 NOT NULL,
`code` varchar(100) COLLATE utf8_bin NOT NULL,
`type_id` varchar(50) CHARACTER SET utf16 COLLATE utf16_bin NOT NULL DEFAULT '1',
`value` int(10) unsigned NOT NULL DEFAULT '5' COMMENT 'Percentage or amount',
`min_amount` bigint(20) unsigned NOT NULL DEFAULT '0',
`owner_id` bigint(20) unsigned NOT NULL,
`created` datetime NOT NULL,
`active` tinyint(1) unsigned NOT NULL DEFAULT '1',
`single_use` tinyint(1) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`id`),
UNIQUE KEY `code` (`code`),
KEY `owner_id` (`owner_id`),
FULLTEXT KEY `name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=4 ;
-- Table structure for table `cake_campaign_types`
CREATE TABLE IF NOT EXISTS `cake_campaign_types` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(50) CHARACTER SET utf8 NOT NULL,
`unit` varchar(10) CHARACTER SET utf16 NOT NULL DEFAULT '%',
`multiplier` double(10,8) NOT NULL DEFAULT '0.01000000',
`type` varchar(50) COLLATE utf8_bin DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=7 ;
目前我的逻辑是,当使用一个活动时,该操作是根据 CampaignType 的名称进行的,例如在购买逻辑中:
if (isset($this->request->data['Purchase']['code'])) {
$code = $this->request->data['Purchase']['code'];
$campaign = $this->Campaign->findByCode($code);
$this->Campaign->id = $campaign['Campaign']['id'];
// campaign no longer active
if ($this->Campaign->field('active') == 0) $code = false;
if ($this->CampaignLog->find('first', array('conditions' => array(
'user_id' => $this->User->field('id'),
'campaign_id' => $this->Campaign->field('id'),
'activated' => 1,
)))) $code = false; // code has already been used
unset($this->request->data['Purchase']['code']);
} else $code = false;
// Some purchasing logic here
if ($code) {
$this->CampaignLog->create();
$this->CampaignLog->save(array(
'campaign_id' => $this->Campaign->field('id'),
'user_id' => $this->User->field('id'),
'activated' => 1,
'source' => $this->Session->read('referrer'),
'earnings' => $earned,
'created' => strftime('%Y-%m-%d %H:%M:%S'),
));
if ($this->Campaign->field('single_use') == 1) {
$this->Campaign->saveField("active", 0);
}
// Apply code here
}
现在,我的问题是:应用这些代码的最佳做法是什么,因为在所有可能的代码类型中使用 if-then-else 或 switch-case 时我有点不安。但是现在,由于有很多事情可以不同(例如折扣 - 百分比或设定金额),那么这似乎是唯一的选择。也许代码的结构/逻辑应该不同?