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Edit File: IfThenElseKeyword.php

<?php
/* ============================================================================
 * Copyright 2020 Zindex Software
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============================================================================ */

namespace Opis\JsonSchema\Keywords;

use Opis\JsonSchema\{
    ValidationContext,
    Keyword,
    Schema
};
use Opis\JsonSchema\Errors\ValidationError;

class IfThenElseKeyword implements Keyword
{
    use ErrorTrait;

/** @var bool|object */
    protected $if;

/** @var bool|object */
    protected $then;

/** @var bool|object */
    protected $else;

/**
     * @param bool|object $if
     * @param bool|object $then
     * @param bool|object $else
     */
    public function __construct($if, $then, $else)
    {
        $this->if = $if;
        $this->then = $then;
        $this->else = $else;
    }

/**
     * @inheritDoc
     */
    public function validate(ValidationContext $context, Schema $schema): ?ValidationError
    {
        if ($this->if === true) {
            return $this->validateBranch('then', $context, $schema);
        } elseif ($this->if === false) {
            return $this->validateBranch('else', $context, $schema);
        }

if (is_object($this->if) && !($this->if instanceof Schema)) {
            $this->if = $context->loader()->loadObjectSchema($this->if);
        }

if ($context->validateSchemaWithoutEvaluated($this->if, null, true)) {
            return $this->validateBranch('else', $context, $schema);
        }

return $this->validateBranch('then', $context, $schema);
    }

/**
     * @param string $branch
     * @param ValidationContext $context
     * @param Schema $schema
     * @return ValidationError|null
     */
    protected function validateBranch(string $branch, ValidationContext $context, Schema $schema): ?ValidationError
    {
        $value = $this->{$branch};

if ($value === true) {
            return null;
        } elseif ($value === false) {
            return $this->error($schema, $context, $branch, "The data is never valid on '{branch}' branch", [
                'branch' => $branch,
            ]);
        }

if (is_object($value) && !($value instanceof Schema)) {
            $value = $this->{$branch} = $context->loader()->loadObjectSchema($value);
        }

if ($error = $value->validate($context)) {
            return $this->error($schema, $context, $branch, "The data is not valid on '{branch}' branch", [
                'branch' => $branch,
            ], $error);
        }

return null;
    }
}

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