我想将一个新的 segmentId（同名）添加到我的映射数组中，但使用不同的 elementId 但相同的方法

问：

下面是MapperInterface.php

我正在尝试弄清楚如何将 if-else 语句添加到常量映射数组中。像这样的东西：

if (LIN02 == “VN”) 
o   Treat LIN03 as the SKU
·         else if (LIN04 == “VN”) 
o   Treat LIN05 as the SKU

<?php

declare(strict_types=1);

namespace Direct\OrderUpdate\Api;

use Direct\OrderUpdate\Api\OrderUpdateInterface;

/**
 * Interface MapperInterface
 * Translates parsed edi file data to a \Direct\OrderUpdate\Api\OrderUpdateInterface
 * @package Direct\OrderUpdate\Api
 */
interface MapperInterface
{
    /**
     * Mapping array formatted as MAPPING[segemntId][elemntId] => methodNameToProcessTheValueOfElement
     * @var array
     */
    const MAPPING = [
        'DTM' => ['DTM02' => 'processCreatedAt'],   // shipment.created_at
        'PRF' => ['PRF01' => 'processIncrementId'], // order.increment_id
        'LIN' => ['LIN05' => 'processSku'],         // shipment.items.sku
        'SN1' => ['SN102' => 'processQty'],         // shipment.items.qty
        'REF' => ['REF02' => 'processTrack']        // shipment.tracks.track_number, shipment.tracks.carrier_code
    ];

    /**
     * Mapping for carrier codes
     * @var array
     */
    const CARRIER_CODES_MAPPING = ['FED' => 'fedex'];

    /**
     * @return array
     */
    public function getMapping(): array;

    /**
     * @param array $segments
     * @return OrderUpdateInterface
     */
    public function map(array $segments): OrderUpdateInterface;
}

我希望这是有道理的。不确定是否有更好的方法可以解决这个问题，但最终我需要超过 1 个“LIN”segmentId。也许添加一个新函数并使用此条件？

新建文件答***

    <?php

    declare(strict_types=1);

    namespace Direct\OrderUpdate\Api;

    use Direct\OrderUpdate\Api\OrderUpdateInterface;

    /**
     * Abstract Mapper
     * Translates parsed edi file data to a \Direct\OrderUpdate\Api\OrderUpdateInterface
     * @package Direct\OrderUpdate\Api
     */

    abstract class AbstractMapper{
    // Here we add all the methods from our interface as abstract
    public abstract function getMapping(): array;
    public abstract function map(array $segments): OrderUpdateInterface;

    // The const here will behave the same as in the interface
    const CARRIER_CODES_MAPPING = ['FED' => 'fedex'];

    // We will set our default mapping - notice these are private to disable access from outside
    private const MAPPING = ['LIN' => [
    'LIN02' => 'VN',
    'LIN01' => 'processSku'],
    'PRF' => ['PRF01' => 'processIncrementId'],
    'DTM' => ['DTM02' => 'processCreatedAt'],
    'SN1' => ['SN102' => 'processQty'],
    'REF' => ['REF02' => 'processTrack']];

    private $mapToProcess = [];

    // When we initiate this class we modify our $mapping member according to our new logic
    function __construct() {
    $this->mapToProcess = self::MAPPING; // init as
    if ($this->mapToProcess['LIN']['LIN02'] == 'VN')
    $this->mapToProcess['LIN']['LIN03'] = 'processSku';
    else if ($this->mapToProcess['LIN']['LIN04'] == 'VN')
        $this->mapToProcess['LIN']['LIN05'] = 'processSku';
    }

    // We use this method to get our process and don't directly use the map
    public function getProcess($segemntId, $elemntId) {
    return $this->mapToProcess[$segemntId][$elemntId];
    }

   }

class Obj extends AbstractMapper {
    // notice that as interface it need to implement all the abstract methods
    public function getMapping() : array {
        return [$this->getMapping()];
    }
    public function map() : array {
        return [$this->map()];
    }

}

class Obj extends AbstractMapper {
    // notice that as interface it need to implement all the abstract methods
    public function getMapping() : array {
        return [$this->getMapping()];
    }
    public function map() : array {
        return [$this->map()];
    }

}