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Edit File: RowValidator.php

<?php

namespace Maatwebsite\Excel\Validators;

use Illuminate\Contracts\Validation\Factory;
use Illuminate\Support\Str;
use Illuminate\Validation\ValidationException as IlluminateValidationException;
use Maatwebsite\Excel\Concerns\SkipsOnFailure;
use Maatwebsite\Excel\Concerns\WithValidation;
use Maatwebsite\Excel\Exceptions\RowSkippedException;

class RowValidator
{
    /**
     * @var Factory
     */
    private $validator;

/**
     * @param  Factory  $validator
     */
    public function __construct(Factory $validator)
    {
        $this->validator = $validator;
    }

/**
     * @param  array  $rows
     * @param  WithValidation  $import
     *
     * @throws ValidationException
     * @throws RowSkippedException
     */
    public function validate(array $rows, WithValidation $import)
    {
        $rules      = $this->rules($import);
        $messages   = $this->messages($import);
        $attributes = $this->attributes($import);

try {
            $validator = $this->validator->make($rows, $rules, $messages, $attributes);

if (method_exists($import, 'withValidator')) {
                $import->withValidator($validator);
            }

$validator->validate();
        } catch (IlluminateValidationException $e) {
            $failures = [];
            foreach ($e->errors() as $attribute => $messages) {
                $row           = strtok($attribute, '.');
                $attributeName = strtok('');
                $attributeName = $attributes['*.' . $attributeName] ?? $attributeName;

$failures[] = new Failure(
                    $row,
                    $attributeName,
                    str_replace($attribute, $attributeName, $messages),
                    $rows[$row] ?? []
                );
            }

if ($import instanceof SkipsOnFailure) {
                $import->onFailure(...$failures);
                throw new RowSkippedException(...$failures);
            }

throw new ValidationException(
                $e,
                $failures
            );
        }
    }

/**
     * @param  WithValidation  $import
     * @return array
     */
    private function messages(WithValidation $import): array
    {
        return method_exists($import, 'customValidationMessages')
            ? $this->formatKey($import->customValidationMessages())
            : [];
    }

/**
     * @param  WithValidation  $import
     * @return array
     */
    private function attributes(WithValidation $import): array
    {
        return method_exists($import, 'customValidationAttributes')
            ? $this->formatKey($import->customValidationAttributes())
            : [];
    }

/**
     * @param  WithValidation  $import
     * @return array
     */
    private function rules(WithValidation $import): array
    {
        return $this->formatKey($import->rules());
    }

/**
     * @param  array  $elements
     * @return array
     */
    private function formatKey(array $elements): array
    {
        return collect($elements)->mapWithKeys(function ($rule, $attribute) {
            $attribute = Str::startsWith($attribute, '*.') ? $attribute : '*.' . $attribute;

return [$attribute => $this->formatRule($rule)];
        })->all();
    }

/**
     * @param  string|object|callable|array  $rules
     * @return string|array
     */
    private function formatRule($rules)
    {
        if (is_array($rules)) {
            foreach ($rules as $rule) {
                $formatted[] = $this->formatRule($rule);
            }

return $formatted ?? [];
        }

if (is_object($rules) || is_callable($rules)) {
            return $rules;
        }

if (Str::contains($rules, 'required_') && preg_match('/(.*?):(.*),(.*)/', $rules, $matches)) {
            $column = Str::startsWith($matches[2], '*.') ? $matches[2] : '*.' . $matches[2];

return $matches[1] . ':' . $column . ',' . $matches[3];
        }

return $rules;
    }
}

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