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-rw-r--r--application/config/ConfigManager.php392
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1<?php
2
3// FIXME! Namespaces...
4require_once 'ConfigIO.php';
5require_once 'ConfigJson.php';
6require_once 'ConfigPhp.php';
7
8/**
9 * Class ConfigManager
10 *
11 * Manages all Shaarli's settings.
12 * See the documentation for more information on settings:
13 * - doc/Shaarli-configuration.html
14 * - https://github.com/shaarli/Shaarli/wiki/Shaarli-configuration
15 */
16class ConfigManager
17{
18 /**
19 * @var string Flag telling a setting is not found.
20 */
21 protected static $NOT_FOUND = 'NOT_FOUND';
22
23 /**
24 * @var string Config folder.
25 */
26 protected $configFile;
27
28 /**
29 * @var array Loaded config array.
30 */
31 protected $loadedConfig;
32
33 /**
34 * @var ConfigIO implementation instance.
35 */
36 protected $configIO;
37
38 /**
39 * Constructor.
40 */
41 public function __construct($configFile = 'data/config')
42 {
43 $this->configFile = $configFile;
44 $this->initialize();
45 }
46
47 /**
48 * Reset the ConfigManager instance.
49 */
50 public function reset()
51 {
52 $this->initialize();
53 }
54
55 /**
56 * Rebuild the loaded config array from config files.
57 */
58 public function reload()
59 {
60 $this->load();
61 }
62
63 /**
64 * Initialize the ConfigIO and loaded the conf.
65 */
66 protected function initialize()
67 {
68 if (file_exists($this->configFile . '.php')) {
69 $this->configIO = new ConfigPhp();
70 } else {
71 $this->configIO = new ConfigJson();
72 }
73 $this->load();
74 }
75
76 /**
77 * Load configuration in the ConfigurationManager.
78 */
79 protected function load()
80 {
81 $this->loadedConfig = $this->configIO->read($this->getConfigFileExt());
82 $this->setDefaultValues();
83 }
84
85 /**
86 * Get a setting.
87 *
88 * Supports nested settings with dot separated keys.
89 * Eg. 'config.stuff.option' will find $conf[config][stuff][option],
90 * or in JSON:
91 * { "config": { "stuff": {"option": "mysetting" } } } }
92 *
93 * @param string $setting Asked setting, keys separated with dots.
94 * @param string $default Default value if not found.
95 *
96 * @return mixed Found setting, or the default value.
97 */
98 public function get($setting, $default = '')
99 {
100 // During the ConfigIO transition, map legacy settings to the new ones.
101 if ($this->configIO instanceof ConfigPhp && isset(ConfigPhp::$LEGACY_KEYS_MAPPING[$setting])) {
102 $setting = ConfigPhp::$LEGACY_KEYS_MAPPING[$setting];
103 }
104
105 $settings = explode('.', $setting);
106 $value = self::getConfig($settings, $this->loadedConfig);
107 if ($value === self::$NOT_FOUND) {
108 return $default;
109 }
110 return $value;
111 }
112
113 /**
114 * Set a setting, and eventually write it.
115 *
116 * Supports nested settings with dot separated keys.
117 *
118 * @param string $setting Asked setting, keys separated with dots.
119 * @param string $value Value to set.
120 * @param bool $write Write the new setting in the config file, default false.
121 * @param bool $isLoggedIn User login state, default false.
122 *
123 * @throws Exception Invalid
124 */
125 public function set($setting, $value, $write = false, $isLoggedIn = false)
126 {
127 if (empty($setting) || ! is_string($setting)) {
128 throw new Exception('Invalid setting key parameter. String expected, got: '. gettype($setting));
129 }
130
131 // During the ConfigIO transition, map legacy settings to the new ones.
132 if ($this->configIO instanceof ConfigPhp && isset(ConfigPhp::$LEGACY_KEYS_MAPPING[$setting])) {
133 $setting = ConfigPhp::$LEGACY_KEYS_MAPPING[$setting];
134 }
135
136 $settings = explode('.', $setting);
137 self::setConfig($settings, $value, $this->loadedConfig);
138 if ($write) {
139 $this->write($isLoggedIn);
140 }
141 }
142
143 /**
144 * Check if a settings exists.
145 *
146 * Supports nested settings with dot separated keys.
147 *
148 * @param string $setting Asked setting, keys separated with dots.
149 *
150 * @return bool true if the setting exists, false otherwise.
151 */
152 public function exists($setting)
153 {
154 // During the ConfigIO transition, map legacy settings to the new ones.
155 if ($this->configIO instanceof ConfigPhp && isset(ConfigPhp::$LEGACY_KEYS_MAPPING[$setting])) {
156 $setting = ConfigPhp::$LEGACY_KEYS_MAPPING[$setting];
157 }
158
159 $settings = explode('.', $setting);
160 $value = self::getConfig($settings, $this->loadedConfig);
161 if ($value === self::$NOT_FOUND) {
162 return false;
163 }
164 return true;
165 }
166
167 /**
168 * Call the config writer.
169 *
170 * @param bool $isLoggedIn User login state.
171 *
172 * @return bool True if the configuration has been successfully written, false otherwise.
173 *
174 * @throws MissingFieldConfigException: a mandatory field has not been provided in $conf.
175 * @throws UnauthorizedConfigException: user is not authorize to change configuration.
176 * @throws IOException: an error occurred while writing the new config file.
177 */
178 public function write($isLoggedIn)
179 {
180 // These fields are required in configuration.
181 $mandatoryFields = array(
182 'credentials.login',
183 'credentials.hash',
184 'credentials.salt',
185 'security.session_protection_disabled',
186 'general.timezone',
187 'general.title',
188 'general.header_link',
189 'privacy.default_private_links',
190 'redirector.url',
191 );
192
193 // Only logged in user can alter config.
194 if (is_file($this->getConfigFileExt()) && !$isLoggedIn) {
195 throw new UnauthorizedConfigException();
196 }
197
198 // Check that all mandatory fields are provided in $conf.
199 foreach ($mandatoryFields as $field) {
200 if (! $this->exists($field)) {
201 throw new MissingFieldConfigException($field);
202 }
203 }
204
205 return $this->configIO->write($this->getConfigFileExt(), $this->loadedConfig);
206 }
207
208 /**
209 * Set the config file path (without extension).
210 *
211 * @param string $configFile File path.
212 */
213 public function setConfigFile($configFile)
214 {
215 $this->configFile = $configFile;
216 }
217
218 /**
219 * Return the configuration file path (without extension).
220 *
221 * @return string Config path.
222 */
223 public function getConfigFile()
224 {
225 return $this->configFile;
226 }
227
228 /**
229 * Get the configuration file path with its extension.
230 *
231 * @return string Config file path.
232 */
233 public function getConfigFileExt()
234 {
235 return $this->configFile . $this->configIO->getExtension();
236 }
237
238 /**
239 * Recursive function which find asked setting in the loaded config.
240 *
241 * @param array $settings Ordered array which contains keys to find.
242 * @param array $conf Loaded settings, then sub-array.
243 *
244 * @return mixed Found setting or NOT_FOUND flag.
245 */
246 protected static function getConfig($settings, $conf)
247 {
248 if (!is_array($settings) || count($settings) == 0) {
249 return self::$NOT_FOUND;
250 }
251
252 $setting = array_shift($settings);
253 if (!isset($conf[$setting])) {
254 return self::$NOT_FOUND;
255 }
256
257 if (count($settings) > 0) {
258 return self::getConfig($settings, $conf[$setting]);
259 }
260 return $conf[$setting];
261 }
262
263 /**
264 * Recursive function which find asked setting in the loaded config.
265 *
266 * @param array $settings Ordered array which contains keys to find.
267 * @param mixed $value
268 * @param array $conf Loaded settings, then sub-array.
269 *
270 * @return mixed Found setting or NOT_FOUND flag.
271 */
272 protected static function setConfig($settings, $value, &$conf)
273 {
274 if (!is_array($settings) || count($settings) == 0) {
275 return self::$NOT_FOUND;
276 }
277
278 $setting = array_shift($settings);
279 if (count($settings) > 0) {
280 return self::setConfig($settings, $value, $conf[$setting]);
281 }
282 $conf[$setting] = $value;
283 }
284
285 /**
286 * Set a bunch of default values allowing Shaarli to start without a config file.
287 */
288 protected function setDefaultValues()
289 {
290 $this->setEmpty('resource.data_dir', 'data');
291 $this->setEmpty('resource.config', 'data/config.php');
292 $this->setEmpty('resource.datastore', 'data/datastore.php');
293 $this->setEmpty('resource.ban_file', 'data/ipbans.php');
294 $this->setEmpty('resource.updates', 'data/updates.txt');
295 $this->setEmpty('resource.log', 'data/log.txt');
296 $this->setEmpty('resource.update_check', 'data/lastupdatecheck.txt');
297 $this->setEmpty('resource.raintpl_tpl', 'tpl/');
298 $this->setEmpty('resource.raintpl_tmp', 'tmp/');
299 $this->setEmpty('resource.thumbnails_cache', 'cache');
300 $this->setEmpty('resource.page_cache', 'pagecache');
301
302 $this->setEmpty('security.ban_after', 4);
303 $this->setEmpty('security.ban_duration', 1800);
304 $this->setEmpty('security.session_protection_disabled', false);
305 $this->setEmpty('security.open_shaarli', false);
306
307 $this->setEmpty('general.header_link', '?');
308 $this->setEmpty('general.links_per_page', 20);
309 $this->setEmpty('general.enabled_plugins', array('qrcode'));
310
311 $this->setEmpty('updates.check_updates', false);
312 $this->setEmpty('updates.check_updates_branch', 'stable');
313 $this->setEmpty('updates.check_updates_interval', 86400);
314
315 $this->setEmpty('feed.rss_permalinks', true);
316 $this->setEmpty('feed.show_atom', false);
317
318 $this->setEmpty('privacy.default_private_links', false);
319 $this->setEmpty('privacy.hide_public_links', false);
320 $this->setEmpty('privacy.hide_timestamps', false);
321
322 $this->setEmpty('thumbnail.enable_thumbnails', true);
323 $this->setEmpty('thumbnail.enable_localcache', true);
324
325 $this->setEmpty('redirector.url', '');
326 $this->setEmpty('redirector.encode_url', true);
327
328 $this->setEmpty('plugins', array());
329 }
330
331 /**
332 * Set only if the setting does not exists.
333 *
334 * @param string $key Setting key.
335 * @param mixed $value Setting value.
336 */
337 public function setEmpty($key, $value)
338 {
339 if (! $this->exists($key)) {
340 $this->set($key, $value);
341 }
342 }
343
344 /**
345 * @return ConfigIO
346 */
347 public function getConfigIO()
348 {
349 return $this->configIO;
350 }
351
352 /**
353 * @param ConfigIO $configIO
354 */
355 public function setConfigIO($configIO)
356 {
357 $this->configIO = $configIO;
358 }
359}
360
361/**
362 * Exception used if a mandatory field is missing in given configuration.
363 */
364class MissingFieldConfigException extends Exception
365{
366 public $field;
367
368 /**
369 * Construct exception.
370 *
371 * @param string $field field name missing.
372 */
373 public function __construct($field)
374 {
375 $this->field = $field;
376 $this->message = 'Configuration value is required for '. $this->field;
377 }
378}
379
380/**
381 * Exception used if an unauthorized attempt to edit configuration has been made.
382 */
383class UnauthorizedConfigException extends Exception
384{
385 /**
386 * Construct exception.
387 */
388 public function __construct()
389 {
390 $this->message = 'You are not authorized to alter config.';
391 }
392}