baoshi-was/app/Services/FeatureService.php

<?php 

namespace App\Services; 

use App\Feature;

Class FeatureService
{
    public function getMapArray()
    {
        $features = Feature::query()->get();
        $map = [];
        foreach ($features as $feature){
            $map[$feature->id] = ["type"=>$feature->type,"logic"=>$feature->logic,"describe"=>$feature->describe];
        }
        return $map;
    }

    public function translationFeature($str)
    {
        if (!$str)return null;
        $result = [];
        preg_match_all('/\d+|[\&\|\(\)]/',$str,$result); //初次匹配以数字&|()为分隔符生成数组
        $sign = 0;  //为第二次切割做起点标记
        $model = [];//第二次切割数组
        $ids = [];//记录出现的特征ID，统一查询
        foreach ($result[0] as $index => &$str){
            if (is_numeric($str)){
                $model[] = array_slice($result[0],$sign,($index-$sign)+1);
                $sign = $index+1;
                $ids[] = $str;
                continue;
            }
            if ($index == count($result[0])-1 && $str == ')'){
                $model[] = [")"];
            }
        }//以数字为标准切割策略组
        $features = Feature::query()->find($ids);//查询出现的特征
        $featureMap = [];
        foreach ($features as $index => $feature){
            $featureMap[$feature->id] = $index;
        }//为查询的特征重组为key-val形式数组留做引用
        foreach ($model as $index => &$m){
            $arr = [
                "strategyGroupStartSign" => false,//是否为策略组起点,这将在解析时解析为 (
                "calculation" => "",//运算规则，目前仅有 &,| 翻译后填入
                "type"=>"",  //特征类型
                "id"=>"",  //特征ID
                "logic"=>"",  //特征逻辑
                "describe"=>"",  //特征信息
                "strategyGroupEndSign" => false,//是否为策略组终点，这将在解析时解析为 )
            ];//最终对象组模型,策略组将几组特征组合引用
            foreach ($m as $str){
                if (is_numeric($str)){//填入特征信息
                    if (isset($featureMap[$str])){
                        $arr["type"] = $features[$featureMap[$str]]->type;
                        $arr["id"] = $features[$featureMap[$str]]->id;
                        $arr["logic"] = $features[$featureMap[$str]]->logic;
                        $arr["describe"] = $features[$featureMap[$str]]->describe;
                    }
                    continue;
                }
                switch ($str){//特殊字符的翻译
                    case "(":
                        $arr["strategyGroupStartSign"] = true;
                        break;
                    case ")":
                        $model[$index-1]["strategyGroupEndSign"] = true;
                        break;
                    case "&":
                        $arr["calculation"] = "并且";
                        break;
                    case "|":
                        $arr["calculation"] = "或";
                        break;
                }
            }
            if (!$arr["id"]){
                unset($model[$index]);
                continue;
            }
            $m = $arr;//变更当前指针为翻译结果
        }
        return $model;
    }

}