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littleTiger/application/admin/logic/ArticleCatLogic.php

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2019-02-28 19:48:21 +08:00
<?php
/**
* tpshop
* ============================================================================
* 版权所有 2015-2027 深圳搜豹网络科技有限公司,并保留所有权利。
* 网站地址: http://www.tp-shop.cn
* ----------------------------------------------------------------------------
* 这不是一个自由软件!您只能在不用于商业目的的前提下对程序代码进行修改和使用 .
* 不允许对程序代码以任何形式任何目的的再发布。
* ============================================================================
* Author: 当燃
* Date: 2015-09-09
*/
namespace app\admin\logic;
use think\Model;
use think\Db;
/**
* 分类逻辑定义
* Class CatsLogic
* @package Admin\Logic
*/
class ArticleCatLogic extends Model
{
/**
* 获得指定分类下的子分类的数组
*
* @access public
* @param int $cat_id 分类的ID
* @param int $selected 当前选中分类的ID
* @param boolean $re_type 返回的类型: 值为真时返回下拉列表,否则返回数组
* @param int $level 限定返回的级数。为0时返回所有级数
* @return mix
*/
public function article_cat_list($cat_id = 0, $selected = 0, $re_type = true, $level = 0)
{
static $res = NULL;
if ($res === NULL)
{
$data = false;//read_static_cache('art_cat_pid_releate');
if ($data === false)
{
$cat_type = I('cat_type/d');
$where = array();
if($cat_type != ""){
$where['c.cat_type'] = $cat_type;
}
$res = DB::name('article_cat')
->field('c.*,count(s.cat_id) as has_children')
->alias('c')
->join('__ARTICLE_CAT__ s','s.parent_id = c.cat_id','LEFT')
->where($where)
->group('c.cat_id')
->order('parent_id,sort_order')
->select();
//write_static_cache('art_cat_pid_releate', $res);
}
else
{
$res = $data;
}
}
if (empty($res) == true)
{
return $re_type ? '' : array();
}
$options = $this->article_cat_options($cat_id, $res); // 获得指定分类下的子分类的数组
/* 截取到指定的缩减级别 */
if ($level > 0)
{
if ($cat_id == 0)
{
$end_level = $level;
}
else
{
$first_item = reset($options); // 获取第一个元素
$end_level = $first_item['level'] + $level;
}
/* 保留level小于end_level的部分 */
foreach ($options AS $key => $val)
{
if ($val['level'] >= $end_level)
{
unset($options[$key]);
}
}
}
$pre_key = 0;
foreach ($options AS $key => $value)
{
$options[$key]['has_children'] = 1;
if ($pre_key > 0)
{
if ($options[$pre_key]['cat_id'] == $options[$key]['parent_id'])
{
$options[$pre_key]['has_children'] = 1;
}
}
$pre_key = $key;
}
if ($re_type == true)
{
$select = '';
foreach ($options AS $var)
{
$select .= '<option value="' . $var['cat_id'] . '" ';
//$select .= ' cat_type="' . $var['cat_type'] . '" ';
$select .= ($selected == $var['cat_id']) ? "selected='ture'" : '';
$select .= '>';
if ($var['level'] > 0)
{
$select .= str_repeat('&nbsp;', $var['level'] * 4);
}
$select .= htmlspecialchars(addslashes($var['cat_name'])) . '</option>';
}
return $select;
}
else
{
foreach ($options AS $key => $value)
{
///$options[$key]['url'] = build_uri('article_cat', array('acid' => $value['cat_id']), $value['cat_name']);
}
return $options;
}
}
/**
* 过滤和排序所有文章分类,返回一个带有缩进级别的数组
*
* @access private
* @param int $cat_id 上级分类ID
* @param array $arr 含有所有分类的数组
* @param int $level 级别
* @return void
*/
public function article_cat_options($spec_cat_id, $arr)
{
static $cat_options = array();
if (isset($cat_options[$spec_cat_id]))
{
return $cat_options[$spec_cat_id];
}
if (!isset($cat_options[0]))
{
$level = $last_cat_id = 0;
$options = $cat_id_array = $level_array = array();
while (!empty($arr))
{
foreach ($arr AS $key => $value)
{
$cat_id = $value['cat_id'];
if ($level == 0 && $last_cat_id == 0)
{
if ($value['parent_id'] > 0)
{
break;
}
$options[$cat_id] = $value;
$options[$cat_id]['level'] = $level;
$options[$cat_id]['id'] = $cat_id;
$options[$cat_id]['name'] = $value['cat_name'];
unset($arr[$key]);
if ($value['has_children'] == 0)
{
continue;
}
$last_cat_id = $cat_id;
$cat_id_array = array($cat_id);
$level_array[$last_cat_id] = ++$level;
continue;
}
if ($value['parent_id'] == $last_cat_id)
{
$options[$cat_id] = $value;
$options[$cat_id]['level'] = $level;
$options[$cat_id]['id'] = $cat_id;
$options[$cat_id]['name'] = $value['cat_name'];
unset($arr[$key]);
if ($value['has_children'] > 0)
{
if (end($cat_id_array) != $last_cat_id)
{
$cat_id_array[] = $last_cat_id;
}
$last_cat_id = $cat_id;
$cat_id_array[] = $cat_id;
$level_array[$last_cat_id] = ++$level;
}
}
elseif ($value['parent_id'] > $last_cat_id)
{
break;
}
}
$count = count($cat_id_array);
if ($count > 1)
{
$last_cat_id = array_pop($cat_id_array);
}
elseif ($count == 1)
{
if ($last_cat_id != end($cat_id_array))
{
$last_cat_id = end($cat_id_array);
}
else
{
$level = 0;
$last_cat_id = 0;
$cat_id_array = array();
continue;
}
}
if ($last_cat_id && isset($level_array[$last_cat_id]))
{
$level = $level_array[$last_cat_id];
}
else
{
$level = 0;
break;
}
}
$cat_options[0] = $options;
}
else
{
$options = $cat_options[0];
}
if (!$spec_cat_id)
{
return $options;
}
else
{
if (empty($options[$spec_cat_id]))
{
return array();
}
$spec_cat_id_level = $options[$spec_cat_id]['level'];
foreach ($options AS $key => $value)
{
if ($key != $spec_cat_id)
{
unset($options[$key]);
}
else
{
break;
}
}
$spec_cat_id_array = array();
foreach ($options AS $key => $value)
{
if (($spec_cat_id_level == $value['level'] && $value['cat_id'] != $spec_cat_id) ||
($spec_cat_id_level > $value['level']))
{
break;
}
else
{
$spec_cat_id_array[$key] = $value;
}
}
$cat_options[$spec_cat_id] = $spec_cat_id_array;
return $spec_cat_id_array;
}
}
}