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1 | <?php |
2 | /** |
3 | * Copyright 2022 Wikimedia Foundation |
4 | * |
5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
6 | * you may not use this file except in compliance with the License. |
7 | * You may obtain a copy of the License at |
8 | * |
9 | * http://www.apache.org/licenses/LICENSE-2.0 |
10 | * |
11 | * Unless required by applicable law or agreed to in writing, software |
12 | * distributed under the License is distributed on an "AS IS" BASIS, |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
14 | * See the License for the specific language governing permissions and |
15 | * limitations under the License. |
16 | * |
17 | * @file |
18 | * @license Apache-2.0 |
19 | * @license MIT |
20 | * @license GPL-2.0-or-later |
21 | * @license LGPL-2.1-or-later |
22 | */ |
23 | |
24 | namespace Wikimedia\Minify; |
25 | |
26 | /** |
27 | * The base class for stateful minifying with source map fetching |
28 | */ |
29 | abstract class MapperState extends MinifierState { |
30 | /** @var MappingsGenerator|null */ |
31 | protected $mappingsGenerator; |
32 | |
33 | public function __construct() { |
34 | $this->mappingsGenerator = new MappingsGenerator; |
35 | } |
36 | |
37 | /** |
38 | * Minify a source file and collect the output and mappings data. |
39 | * |
40 | * @param string $url The name of the input file. Possibly a URL relative |
41 | * to the source root. |
42 | * @param string $source The input source text. |
43 | * @param bool $bundle Whether to add the source text to sourcesContent |
44 | * @return $this |
45 | */ |
46 | public function addSourceFile( string $url, string $source, bool $bundle = false ) { |
47 | $this->sources[] = $url; |
48 | if ( $bundle ) { |
49 | $this->sourcesContent[] = $source; |
50 | } else { |
51 | $this->sourcesContent[] = null; |
52 | } |
53 | $this->mappingsGenerator->nextSourceFile( $source ); |
54 | return parent::addSourceFile( $url, $source, $bundle ); |
55 | } |
56 | |
57 | /** |
58 | * Add a string to the output without any minification or source mapping. |
59 | * |
60 | * @param string $output |
61 | * @return $this |
62 | */ |
63 | public function addOutput( string $output ) { |
64 | $this->mappingsGenerator->outputSpace( $output ); |
65 | return parent::addOutput( $output ); |
66 | } |
67 | |
68 | /** |
69 | * Get the source map data to be JSON encoded. |
70 | * |
71 | * @return array |
72 | */ |
73 | public function getSourceMapData() { |
74 | $data = [ 'version' => 3 ]; |
75 | if ( $this->outputFile !== null ) { |
76 | $data['file'] = $this->outputFile; |
77 | } |
78 | if ( $this->sourceRoot !== null ) { |
79 | $data['sourceRoot'] = $this->sourceRoot; |
80 | } |
81 | $data['sources'] = $this->sources; |
82 | |
83 | $needSourcesContent = false; |
84 | foreach ( $this->sourcesContent as $content ) { |
85 | if ( $content !== null ) { |
86 | $needSourcesContent = true; |
87 | } |
88 | } |
89 | if ( $needSourcesContent ) { |
90 | $data['sourcesContent'] = $this->sourcesContent; |
91 | } |
92 | $data['names'] = []; |
93 | $data['mappings'] = $this->mappingsGenerator->getMap(); |
94 | return $data; |
95 | } |
96 | |
97 | /** |
98 | * Get the JSON-encoded source map. Take care to avoid leaking private data |
99 | * due to an XSSI attack. |
100 | * |
101 | * @return string |
102 | */ |
103 | public function getRawSourceMap() { |
104 | $data = $this->getSourceMapData(); |
105 | $out = "{\n"; |
106 | $first = true; |
107 | foreach ( $data as $key => $value ) { |
108 | if ( $first ) { |
109 | $first = false; |
110 | } else { |
111 | $out .= ",\n"; |
112 | } |
113 | $out .= json_encode( $key ) . ': ' . |
114 | json_encode( $value, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES ); |
115 | } |
116 | $out .= "\n}\n"; |
117 | return $out; |
118 | } |
119 | |
120 | /** |
121 | * Get the JSON-encoded source map including XSSI protection prefix. |
122 | * |
123 | * @return string |
124 | */ |
125 | public function getSourceMap() { |
126 | return ")]}\n" . $this->getRawSourceMap(); |
127 | } |
128 | } |