<?php

namespace backend\models;

use backend\models\Category;
use yii\base\Model;
use yii\data\ActiveDataProvider;
use yii\helpers\ArrayHelper;

/**
 * CategorySearch represents the model behind the search form of `\backend\models\Category`.
 */
class CategorySearch extends Category
{
    /**
     * @return array
     * 增加创建时间查询字段
     */
    public function attributes()
    {
        return ArrayHelper::merge(['created_at_range'], parent::attributes());
    }

    /**
     * {@inheritdoc}
     */
    public function rules()
    {
        return [
            [['id', 'icon_type', 'sort_order', 'created_at', 'updated_at'], 'integer'],
            [['cat_name', 'icon', 'description', 'created_at_range'], 'safe'],
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function scenarios()
    {
        // bypass scenarios() implementation in the parent class
        return Model::scenarios();
    }

    /**
     * @param $params
     * @return ActiveDataProvider
     * 不分页的所有数据
     */
    public function allData($params)
    {
        $query = Category::find();
        $dataProvider = new ActiveDataProvider([
            'query' => $query,
            'pagination' => false,
            'sort' => false
        ]);
        $this->load($params);
        return $this->filter($query, $dataProvider);
    }

    /**
     * Creates data provider instance with search query applied
     *
     * @param array $params
     *
     * @return ActiveDataProvider
     */
    public function search($params)
    {
        $query = Category::find();

        // add conditions that should always apply here

        $dataProvider = new ActiveDataProvider([
            'query' => $query,
            'pagination' => [
                'pageSizeLimit' => [1, 200]
            ],
            'sort' => [
                'defaultOrder' => [
                    'id' => SORT_DESC,
                ]
            ],
        ]);
        $this->load($params);
        return $this->filter($query, $dataProvider);
    }

    /**
     * @param $query
     * @param $dataProvider
     * @return ActiveDataProvider
     * 条件筛选
     */
    private function filter($query, $dataProvider)
    {

        if (!$this->validate()) {
            // uncomment the following line if you do not want to return any records when validation fails
            // $query->where('0=1');
            return $dataProvider;
        }

// grid filtering conditions
        $query->andFilterWhere([
            'id' => $this->id,
            'icon_type' => $this->icon_type,
            'sort_order' => $this->sort_order,
            'created_at' => $this->created_at,
            'updated_at' => $this->updated_at,
        ]);

        $query->andFilterWhere(['like', 'cat_name', $this->cat_name])
            ->andFilterWhere(['like', 'icon', $this->icon])
            ->andFilterWhere(['like', 'description', $this->description]);

        if ($this->created_at_range) {
            $arr = explode(' ~ ', $this->created_at_range);
            $start = strtotime($arr[0]);
            $end = strtotime($arr[1]) + 3600 * 24;
            $query->andFilterWhere(['between', 'created_at', $start, $end]);
        }
        return $dataProvider;
    }

}