wikimedia/mediawiki-extensions-DonationInterface

<?php

use SmashPig\Core\PaymentError;
use SmashPig\Core\ValidationError;

class ErrorState {
    /** @var (PaymentError|ValidationError)[] */
    protected $errors = [];

    /**
     * Unset validation error for a specific field
     *
     * @param string $field data field name
     */
    public function clearValidationError( $field ) {
        $toDelete = -1;
        foreach ( $this->errors as $index => $error ) {
            if (
                $error instanceof ValidationError &&
                $error->getField() === $field
            ) {
                $toDelete = $index;
            }
        }
        if ( $toDelete > -1 ) {
            array_splice( $this->errors, $toDelete, 1 );
        }
    }

    /**
     * @param PaymentError|ValidationError $error
     */
    public function addError( $error ) {
        if ( $error instanceof ValidationError ) {
            $field = $error->getField();
            if ( $this->hasValidationError( $field ) ) {
                $this->clearValidationError( $field );
            }
        }
        $this->errors[] = $error;
    }

    public function addErrors( $errors ) {
        foreach ( $errors as $error ) {
            $this->addError( $error );
        }
    }

    /**
     * @return array PaymentError|ValidationError
     */
    public function getErrors() {
        return $this->errors;
    }

    public function hasErrors() {
        return $this->errors !== [];
    }

    /**
     * Is a specific field invalid, or is any field invalid?
     *
     * @param string|null $field data field name, or null to check all fields
     * @return bool true if a validation error exists for the given field
     */
    public function hasValidationError( $field = null ) {
        foreach ( $this->errors as $error ) {
            if ( $error instanceof ValidationError ) {
                if ( $field === null || $error->getField() === $field ) {
                    return true;
                }
            }
        }
        return false;
    }
}