<?php
/**
 * Created by PhpStorm.
 * User: zhonglei
 * Date: 17/10/13
 * Time: 18:41
 */
namespace Common\Model;

class CourseExamModel extends \Com\Model
{

    // 构造方法
    public function __construct()
    {
        parent::__construct('Exam', 'oa_course_');
    }

    /**
     * 获取用户课程测评次数排行
     * @author zhonglei
     * @param array $conds 条件
     * @param int $limit 数据总数，0为取所有数据
     * @return array
     */
    public function listUserRank($conds, $limit = 0)
    {
        $wheres = [];
        $params = [];

        if (is_array($conds) && !empty($conds)) {
            $this->_parse_where($wheres, $params, $conds);
        }

        // 企业标记
        $wheres[] = "`{$this->prefield}domain`=?";
        $params[] = QY_DOMAIN;
        // 状态条件
        $wheres[] = "`{$this->prefield}status`<?";
        $params[] = $this->get_st_delete();

        $wheres_sql = implode(' AND ', $wheres);
        $sql = "SELECT *, COUNT(*) `total` FROM __TABLE__ WHERE {$wheres_sql} GROUP BY `uid` ORDER BY `total` DESC";

        if ($limit > 0) {
            $sql .= " LIMIT {$limit}";
        }

        return $this->_m->fetch_array($sql, $params);
    }
}