product/lib/Category.php

<?php

namespace Product\Lib;

use Dever;

class Category
{
    private $default = array
    (
        'value' => -1,
        'name' => '不选择',
    );

    private $search_default = array
    (
        'value' => -1,
        'name' => '分类',
    );

	/**
     * 获取分类数据
     *
     * @return mixed
     */
    public function get_api()
    {
        # 关闭语言包
        Dever::config('base')->lang = false;
        
        # 联动总数
        $level_total = 100;

        # 当前联动级别
        $level_num = Dever::input('level_num');

        # 一般为id
        $level_id = Dever::input('level_id');

        # 传入的参数
        $level_param = Dever::input('level_param');
        if ($level_param) {
            parse_str($level_param, $param);
            $where['id'] = $param['id'];
        }

        # 是否是搜索列表页
        $level_search = Dever::input('level_search');
        if ($level_search) {
            $default = $this->search_default;
            $default['name'] = $level_num . '级' . $default['name'];
        } else {
            $default = $this->default;
        }

        $data = array();

        # 三级联动
        if ($level_num == 1) {
            $where['parent_id'] = -1;
        } elseif($level_id > 0) {
            $where['parent_id'] = $level_id;
        }

        if (isset($where['parent_id'])) {
            $data = Dever::db('product/category')->getAll($where);
        }

        $type = Dever::input('type');
        if ($data) {
            if ($type && $type == 1) {
                if ($level_num == 1) {
                    array_unshift($data, $default);
                }
            } else {
                array_unshift($data, $default);
            }
        }

        if (!$data) {
            Dever::alert('error');
        }

        $result['level_total'] = $level_total;
        $result['list'] = $data;
        return $result;
    }

    /**
     * 根据分类id转成名称
     *
     * @return mixed
     */
    public function string($cate, $im = ',')
    {
        if ($cate) {
            $cate = explode(',', $cate);
            $result = array();
            foreach ($cate as $k => $v) {
                $result[$k] = $this->getName($v);
            }
            $result = implode($im, $result);
            return $result;
            $table[] = $result;
            return Dever::table($table);
        }
        return '';
    }

    /**
     * 获取顶级分类
     *
     * @return mixed
     */
    public function getTop()
    {
        $where = array();
        $result = Dever::db('product/category')->getTop($where);
        return $result;
    }

    /**
     * 获取所有信息
     *
     * @return mixed
     */
    public function getAll($parent = false)
    {
        $where = array();
        if ($parent) {
            $where['parent_id'] = $parent;
        }
        $result = Dever::db('product/category')->getList($where);
        return $result;
    }

    /**
     * 获取详细信息
     *
     * @return mixed
     */
    public function getInfo($cate)
    {
        if ($cate) {
            $cate = explode(',', $cate);
            $result = array();
            foreach ($cate as $k => $v) {
                $result[$k] = $this->getName($v, true);
            }
            return $result;
        }
        return array();
    }


    private function getName($id, $state = false)
    {
        $name = '';
        if ($id > 0) {
            $data = Dever::db('product/category')->getOne($id);
            if ($state) {
                return $data;
            }
            if ($data) {
                $name = $data['name'];
            }
        }
        return $name;
    }

    # 根据上级分类获取下级分类 按照category_id进行索引
    public function getChild($parent_id)
    {
        if (is_numeric($parent_id)) {
            $where['parent_id'] = $parent_id;
        } else {
            $where['parent_id_in'] = $parent_id;
        }
        
        $data = Dever::db('product/category')->getChild($where);

        return $data;
    }

    # 根据上级分类获取下级分类 
    public function getList($parent_id)
    {
        if (is_numeric($parent_id)) {
            $where['parent_id'] = $parent_id;
        } else {
            $where['parent_id_in'] = $parent_id;
        }
        
        $data = Dever::db('product/category')->getList($where);

        return $data;
    }

    # 根据顶级分类获取最低级的分类
    public function getChildByTop($top_parent_id, $level = -1)
    {
        $where['top_parent_id'] = $top_parent_id;
        $where['level'] = $level;
        $data = Dever::db('product/category')->getList($where);

        return $data;
    }
}