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1 | <?php |
2 | /** |
3 | * |
4 | * This file is part of the phpBB Forum Software package. |
5 | * |
6 | * @copyright (c) phpBB Limited <https://www.phpbb.com> |
7 | * @license GNU General Public License, version 2 (GPL-2.0) |
8 | * |
9 | * For full copyright and license information, please see |
10 | * the docs/CREDITS.txt file. |
11 | * |
12 | */ |
13 | |
14 | namespace phpbb\config; |
15 | |
16 | /** |
17 | * Configuration container class |
18 | */ |
19 | class config implements \ArrayAccess, \IteratorAggregate, \Countable |
20 | { |
21 | /** |
22 | * The configuration data |
23 | * @var array<string,int|string> |
24 | */ |
25 | protected $config; |
26 | |
27 | /** |
28 | * Creates a configuration container with a default set of values |
29 | * |
30 | * @param array<string,int|string> $config The configuration data. |
31 | */ |
32 | public function __construct(array $config) |
33 | { |
34 | $this->config = $config; |
35 | } |
36 | |
37 | /** |
38 | * Retrieves an ArrayIterator over the configuration values. |
39 | * |
40 | * @return \ArrayIterator An iterator over all config data |
41 | */ |
42 | public function getIterator(): \ArrayIterator |
43 | { |
44 | return new \ArrayIterator($this->config); |
45 | } |
46 | |
47 | /** |
48 | * Checks if the specified config value exists. |
49 | * |
50 | * @param string $key The configuration option's name. |
51 | * @return bool Whether the configuration option exists. |
52 | */ |
53 | #[\ReturnTypeWillChange] |
54 | public function offsetExists($key) |
55 | { |
56 | return isset($this->config[$key]); |
57 | } |
58 | |
59 | /** |
60 | * Retrieves a configuration value. |
61 | * |
62 | * @param string $key The configuration option's name. |
63 | * @return int|string The configuration value |
64 | */ |
65 | #[\ReturnTypeWillChange] |
66 | public function offsetGet($key) |
67 | { |
68 | return (isset($this->config[$key])) ? $this->config[$key] : ''; |
69 | } |
70 | |
71 | /** |
72 | * Temporarily overwrites the value of a configuration variable. |
73 | * |
74 | * The configuration change will not persist. It will be lost |
75 | * after the request. |
76 | * |
77 | * @param string $offset The configuration option's name. |
78 | * @param int|string $value The temporary value. |
79 | */ |
80 | #[\ReturnTypeWillChange] |
81 | public function offsetSet($offset, $value) |
82 | { |
83 | $this->config[$offset] = $value; |
84 | } |
85 | |
86 | /** |
87 | * Called when deleting a configuration value directly, triggers an error. |
88 | * |
89 | * @param string $offset The configuration option's name. |
90 | */ |
91 | #[\ReturnTypeWillChange] |
92 | public function offsetUnset($offset): never |
93 | { |
94 | trigger_error('Config values have to be deleted explicitly with the \phpbb\config\config::delete($key) method.', E_USER_ERROR); |
95 | } |
96 | |
97 | /** |
98 | * Retrieves the number of configuration options currently set. |
99 | * |
100 | * @return int Number of config options |
101 | */ |
102 | public function count(): int |
103 | { |
104 | return count($this->config); |
105 | } |
106 | |
107 | /** |
108 | * Removes a configuration option |
109 | * |
110 | * @param String $key The configuration option's name |
111 | * @param bool $use_cache Whether this variable should be cached or if it |
112 | * changes too frequently to be efficiently cached |
113 | * @return void |
114 | */ |
115 | public function delete($key, $use_cache = true) |
116 | { |
117 | unset($this->config[$key]); |
118 | } |
119 | |
120 | /** |
121 | * Sets a configuration option's value |
122 | * |
123 | * @param string $key The configuration option's name |
124 | * @param int|string $value New configuration value |
125 | * @param bool $use_cache Whether this variable should be cached or if it |
126 | * changes too frequently to be efficiently cached. |
127 | */ |
128 | public function set($key, $value, $use_cache = true) |
129 | { |
130 | $this->config[$key] = $value; |
131 | } |
132 | |
133 | /** |
134 | * Sets a configuration option's value only if the old_value matches the |
135 | * current configuration value or the configuration value does not exist yet. |
136 | * |
137 | * @param string $key The configuration option's name |
138 | * @param int|string $old_value Current configuration value |
139 | * @param int|string $new_value New configuration value |
140 | * @param bool $use_cache Whether this variable should be cached or if it |
141 | * changes too frequently to be efficiently cached. |
142 | * @return bool True if the value was changed, false otherwise. |
143 | */ |
144 | public function set_atomic($key, $old_value, $new_value, $use_cache = true) |
145 | { |
146 | if (!isset($this->config[$key]) || $this->config[$key] == $old_value) |
147 | { |
148 | $this->config[$key] = $new_value; |
149 | return true; |
150 | } |
151 | return false; |
152 | } |
153 | |
154 | /** |
155 | * Checks configuration option's value only if the new_value matches the |
156 | * current configuration value and the configuration value does exist.Called |
157 | * only after set_atomic has been called. |
158 | * |
159 | * @param string $key The configuration option's name |
160 | * @param int|string $new_value New configuration value |
161 | * @throws \phpbb\exception\http_exception when config value is set and not equal to new_value. |
162 | * @return bool True if the value was changed, false otherwise. |
163 | */ |
164 | public function ensure_lock($key, $new_value) |
165 | { |
166 | if (isset($this->config[$key]) && $this->config[$key] == $new_value) |
167 | { |
168 | return true; |
169 | } |
170 | throw new \phpbb\exception\http_exception(500, 'Failure while aqcuiring locks.'); |
171 | } |
172 | |
173 | /** |
174 | * Increments an integer configuration value. |
175 | * |
176 | * @param string $key The configuration option's name |
177 | * @param int $increment Amount to increment by |
178 | * @param bool $use_cache Whether this variable should be cached or if it |
179 | * changes too frequently to be efficiently cached. |
180 | */ |
181 | function increment($key, $increment, $use_cache = true) |
182 | { |
183 | if (!isset($this->config[$key])) |
184 | { |
185 | $this->config[$key] = 0; |
186 | } |
187 | |
188 | $this->config[$key] += $increment; |
189 | } |
190 | } |