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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 | if ( !array_key_exists( 'type', $schemanode ) ) { |
78 | $schemanode['type'] = 'any'; |
79 | } |
80 | $nodetype = $schemanode['type']; |
81 | switch ( $nodetype ) { |
82 | case 'object': |
83 | foreach ( $schemanode['properties'] as $value ) { |
84 | $this->indexSubtree( $value ); |
85 | } |
86 | |
87 | break; |
88 | case 'array': |
89 | $this->indexSubtree( $schemanode['items'] ); |
90 | break; |
91 | } |
92 | if ( isset( $schemanode['id'] ) ) { |
93 | $this->idtable[$schemanode['id']] = $schemanode; |
94 | } |
95 | } |
96 | |
97 | /** |
98 | * Generate a new schema ref, or return an existing one from the index if |
99 | * the node is an idref. |
100 | * @param array $node |
101 | * @param TreeRef|null $parent |
102 | * @param int|null $nodeindex |
103 | * @param string $nodename |
104 | * @return TreeRef |
105 | * @throws JsonSchemaException |
106 | */ |
107 | public function newRef( $node, $parent, $nodeindex, $nodename ) { |
108 | if ( array_key_exists( '$ref', $node ) ) { |
109 | if ( strspn( $node['$ref'], '#' ) != 1 ) { |
110 | throw new JsonSchemaException( 'jsonschema-badidref', $node['$ref'] ); |
111 | } |
112 | $idref = $node['$ref']; |
113 | try { |
114 | $node = $this->idtable[$idref]; |
115 | } catch ( Exception $e ) { |
116 | throw new JsonSchemaException( 'jsonschema-badidref', $node['$ref'] ); |
117 | } |
118 | } |
119 | |
120 | return new TreeRef( $node, $parent, $nodeindex, $nodename ); |
121 | } |
122 | } |