<?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;
}
}