<?php


namespace app\common\model;


use think\db\BaseQuery;
use think\facade\Db;
use think\Model;

/**
 * Class BaseModel
 * @package app\common\model
 * @author xaboy
 * @day 2020-03-30
 */
abstract class BaseModel extends Model
{
    protected $updateTime = false;

    /**
     * @return string
     * @author xaboy
     * @day 2020-03-30
     */
    abstract public static function tablePk():? string;

    /**
     * @return string
     * @author xaboy
     * @day 2020-03-30
     */
    abstract public static function tableName(): string;

    /**
     * BaseModel constructor.
     * @param array $data
     */
    public function __construct(array $data = [])
    {
        $this->pk = static::tablePk();
        $this->name = static::tableName();
        parent::__construct($data);
    }

    /**
     * @return static
     */
    public static function getInstance(): self
    {
        return new static();
    }

    /**
     * @param array $scope
     * @return BaseQuery
     * @author xaboy
     * @day 2020-03-30
     */
    public static function getDB(array $scope = [])
    {
        return self::getInstance()->db($scope);
    }

    public static function batchUpdate(array $update, $whenField = 'id', $whereField = 'id', $raw = false){
        $when = [];
        $ids = [];
        foreach ($update as $sets) {
            #　跳过没有更新主键的数据
            if (!isset($sets[$whenField])) {
                continue;
            }
            $whenValue = $sets[$whenField];

            foreach ($sets as $fieldName => $value) {
                #主键不需要被更新
                if ($fieldName == $whenField) {
                    array_push($ids, $value);
                    continue;
                };
                if ($raw) {
                    $when[$fieldName][] = "when {$whenValue} then {$value}";
                } else {
                    $when[$fieldName][] = "when '{$whenValue}' then '{$value}'";
                }
            }
        }

        #　没有更新的条件id
        if (!$when) return false;
        $query = self::whereIn($whereField, $ids);
        #　组织sql
        foreach ($when as $fieldName => &$item) {
            $item = Db::raw("case $whenField " . implode(' ', $item) . ' end ');
        }

        return $query->update($when);
    }

}