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JsonSchemaIndex.php
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JsonSchemaIndex.php
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<?php
/**
* JSON Schema Validation Library
*
* Copyright (c) 2005-2012, Rob Lanphier
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* * Neither my name nor the names of my contributors may be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @author Rob Lanphier <robla@wikimedia.org>
* @copyright © 2011-2012 Rob Lanphier
* @license http://jsonwidget.org/LICENSE BSD-3-Clause
*/
namespace MediaWiki\Extension\EventLogging\Libs\JsonSchemaValidation;
use Exception;
/**
* The JsonSchemaIndex object holds all schema refs with an "id", and is used
* to resolve an idref to a schema ref. This also holds the root of the schema
* tree. This also serves as sort of a class factory for schema refs.
*/
class JsonSchemaIndex {
/** @var array|null */
public $root;
/** @var array */
public $idtable;
/**
* The whole tree is indexed on instantiation of this class.
* @param array|null $schema
*/
public function __construct( $schema ) {
$this->root = $schema;
$this->idtable = [];
if ( $this->root === null ) {
return;
}
$this->indexSubtree( $this->root );
}
/**
* Recursively find all of the ids in this schema, and store them in the
* index.
* @param array $schemanode
*/
public function indexSubtree( $schemanode ) {
if ( !array_key_exists( 'type', $schemanode ) ) {
$schemanode['type'] = 'any';
}
$nodetype = $schemanode['type'];
switch ( $nodetype ) {
case 'object':
foreach ( $schemanode['properties'] as $value ) {
$this->indexSubtree( $value );
}
break;
case 'array':
$this->indexSubtree( $schemanode['items'] );
break;
}
if ( isset( $schemanode['id'] ) ) {
$this->idtable[$schemanode['id']] = $schemanode;
}
}
/**
* Generate a new schema ref, or return an existing one from the index if
* the node is an idref.
* @param array $node
* @param TreeRef|null $parent
* @param int|null $nodeindex
* @param string $nodename
* @return TreeRef
* @throws JsonSchemaException
*/
public function newRef( $node, $parent, $nodeindex, $nodename ) {
if ( array_key_exists( '$ref', $node ) ) {
if ( strspn( $node['$ref'], '#' ) != 1 ) {
throw new JsonSchemaException( 'jsonschema-badidref', $node['$ref'] );
}
$idref = $node['$ref'];
try {
$node = $this->idtable[$idref];
} catch ( Exception $e ) {
throw new JsonSchemaException( 'jsonschema-badidref', $node['$ref'] );
}
}
return new TreeRef( $node, $parent, $nodeindex, $nodename );
}
}

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