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| 1 | <?php |
| 2 | /** |
| 3 | * JSON Schema Validation Library |
| 4 | * |
| 5 | * Copyright (c) 2005-2012, Rob Lanphier |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions are |
| 10 | * met: |
| 11 | * |
| 12 | * * Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 15 | * * Redistributions in binary form must reproduce the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer in the documentation and/or other materials provided |
| 18 | * with the distribution. |
| 19 | * |
| 20 | * * Neither my name nor the names of my contributors may be used to |
| 21 | * endorse or promote products derived from this software without |
| 22 | * specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 25 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 26 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 27 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 28 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 29 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 30 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 31 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 32 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 33 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 34 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 35 | * |
| 36 | * @author Rob Lanphier <robla@wikimedia.org> |
| 37 | * @copyright © 2011-2012 Rob Lanphier |
| 38 | * @license http://jsonwidget.org/LICENSE BSD-3-Clause |
| 39 | */ |
| 40 | |
| 41 | namespace MediaWiki\Extension\EventLogging\Libs\JsonSchemaValidation; |
| 42 | |
| 43 | use Exception; |
| 44 | |
| 45 | /** |
| 46 | * The JsonSchemaIndex object holds all schema refs with an "id", and is used |
| 47 | * to resolve an idref to a schema ref. This also holds the root of the schema |
| 48 | * tree. This also serves as sort of a class factory for schema refs. |
| 49 | */ |
| 50 | class JsonSchemaIndex { |
| 51 | /** @var array|null */ |
| 52 | public $root; |
| 53 | /** @var array */ |
| 54 | public $idtable; |
| 55 | |
| 56 | /** |
| 57 | * The whole tree is indexed on instantiation of this class. |
| 58 | * @param array|null $schema |
| 59 | */ |
| 60 | public function __construct( $schema ) { |
| 61 | $this->root = $schema; |
| 62 | $this->idtable = []; |
| 63 | |
| 64 | if ( $this->root === null ) { |
| 65 | return; |
| 66 | } |
| 67 | |
| 68 | $this->indexSubtree( $this->root ); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Recursively find all of the ids in this schema, and store them in the |
| 73 | * index. |
| 74 | * @param array $schemanode |
| 75 | */ |
| 76 | public function indexSubtree( $schemanode ) { |
| 77 | $schemanode['type'] ??= 'any'; |
| 78 | $nodetype = $schemanode['type']; |
| 79 | switch ( $nodetype ) { |
| 80 | case 'object': |
| 81 | foreach ( $schemanode['properties'] as $value ) { |
| 82 | $this->indexSubtree( $value ); |
| 83 | } |
| 84 | |
| 85 | break; |
| 86 | case 'array': |
| 87 | $this->indexSubtree( $schemanode['items'] ); |
| 88 | break; |
| 89 | } |
| 90 | if ( isset( $schemanode['id'] ) ) { |
| 91 | $this->idtable[$schemanode['id']] = $schemanode; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Generate a new schema ref, or return an existing one from the index if |
| 97 | * the node is an idref. |
| 98 | * @param array $node |
| 99 | * @param TreeRef|null $parent |
| 100 | * @param int|null $nodeindex |
| 101 | * @param string $nodename |
| 102 | * @return TreeRef |
| 103 | * @throws JsonSchemaException |
| 104 | */ |
| 105 | public function newRef( $node, $parent, $nodeindex, $nodename ) { |
| 106 | if ( array_key_exists( '$ref', $node ) ) { |
| 107 | if ( strspn( $node['$ref'], '#' ) != 1 ) { |
| 108 | throw new JsonSchemaException( 'jsonschema-badidref', $node['$ref'] ); |
| 109 | } |
| 110 | $idref = $node['$ref']; |
| 111 | try { |
| 112 | $node = $this->idtable[$idref]; |
| 113 | } catch ( Exception ) { |
| 114 | throw new JsonSchemaException( 'jsonschema-badidref', $node['$ref'] ); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | return new TreeRef( $node, $parent, $nodeindex, $nodename ); |
| 119 | } |
| 120 | } |