<?php
namespace app\model;

class Category extends Base
{
    //获取首页栏目ID
    public static function getIndex()
    {
        return self::where('is_index', 1)->findOrEmpty()->toArray();
    }
    //根据上级ID和语言获取下级栏目
    public static function getChildrenByParentId($parentId)
    {
        if($parentId <= 0){
            return [];
        }
        $category = self::getById($parentId);
        if(empty($category)){
            return [];
        }
        return self::alias('c')
        ->leftJoin('model m', 'c.model_id=m.id')
        ->field('c.*, m.manager, m.template, m.name as modelName')
        ->where('c.parent_id', $parentId)
        ->order('c.sort','asc')
        ->select()
        ->toArray();
    }
    //重写方法
    public static function getById($categoryId)
    {
        return self::alias('c')
        ->leftJoin('model m', 'c.model_id = m.id')
        ->where('c.id', $categoryId)
        ->field('c.*, m.template')
        ->findOrEmpty()
        ->toArray();
    }
    //查看是否有下级栏目
    public static function hasChildren($categoryId)
    {
        if (is_array($categoryId)) {
            $count = self::where('parent_id', 'in', $categoryId)->count();
        } else {
            $count = self::where(['parent_id'=>$categoryId])->count();
        }
        return $count ? true : false;
    }

    //获取前台菜单
    public static function getListForFrontMenu()
    {
        $items = self::alias('c')
        ->leftJoin('model m','c.model_id=m.id')
        ->field('c.*, m.manager, m.template')
        ->where('c.state', 1)
        ->order('is_index desc, sort asc')
        ->select()
        ->toArray();
        return self::getCates($items);
    }
    /**
     * 获取栏目
     * @param bool $limit 是否限制查询
     * @param array $cates 需要限制查询的栏目IDs
     */
    public static function getList($limit = false, $cates = [])
    {
        if ($limit && empty($cates)) {
            return [];
        }
        return self::alias('c')
        ->leftJoin('model m', 'c.model_id=m.id')
        ->field('c.*, m.manager, m.name as modelName')
        ->when($limit, function($query) use($cates) {
            $query->whereIn('c.id', $cates);
        })
        ->order('sort','asc')
        ->select()
        ->toArray();
    }

    //获取栏目分级列表
    public static function getListTree($isMenu = false)
    {
        if ($isMenu) {
            $items = self::where('c.state', 1) ->order('sort','asc')->select()->toArray();
        } else {
            $items = self::order('sort','asc')->select()->toArray();
        }
        return self::getCates($items);
    }

    //获取递归栏目
    public static function getCates($cates,$parentId=0)
    {
        $menus = [];
        foreach($cates as $cate){
            if($cate['parent_id'] == $parentId){
                $children = self::getCates($cates,$cate['id']);
                if(!empty($children)){
                    $cate['children'] = $children;
                }
                $menus[] = $cate;
            }
        }
        return $menus;
    }
    
    public static function onAfterInsert($category)
    {
        $category->sort = $category->id;
        $category->save();
    }

    //递归获取上级栏目名称
    public static function getCatesCrumbs($currentId = 0)
    {
        $crumbs = [];
        $category = self::getById($currentId);
        if($category['parent_id'] == 0){
            $cateCrumbs[] = $category['title'];
        }else{
            $categoryIds = explode(',', trim($category['path'], ','));
            $categories = self::where('id', 'in', $categoryIds)->column('*', 'id');
            foreach($categoryIds as $id){
                if(isset($categories[$id])){
                    $crumbs[] = $categories[$id]['title'];
                }
            }
        }
        return $crumbs;
    }

    //获取栏目中涉及到的文件
    public static function getFilesInUse()
    {
        $items = self::select()->toArray();
        $data = [];
        foreach($items as $item){
            $src = trim($item['src']);
            if(!empty($src)){
                $key = getKeyByPath($src);
                $data[$key] = $src;
            }
        }
        return $data;
    }
    
    //当前分类的最高级分类Id
    public static function firstGradeById($id)
    {
        $res = 0;
        $item = self::getById($id);
        if ($item) {
            $res = $id;
            if ($item['parent_id'] > 0) {
                $items = self::select()->toArray();
                $first = self::getFirstGrade($items, $item['parent_id']);
                if (!empty($first)) {
                    $res = $first['id'];
                }
            }
        }
        return $res;
    }

    public static function getFirstGrade($items, $parentId)
    {
        $data = [];
        foreach ($items as $key=> $item) {
            if($item['id'] == $parentId) {
                if ($item['parent_id'] > 0) {
                    unset($items[$key]);
                    $parent = self::getFirstGrade($items, $item['parent_id']);
                    if (!empty($parent)) {
                        $data =  $parent;
                    } else {
                        $data = $item;
                    }
                } else {
                    $data = $item;
                }
            }
        }
        return $data;
    }
}