428 lines
12 KiB
PHP
428 lines
12 KiB
PHP
<?php
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// FIXME! Namespaces...
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require_once 'ConfigIO.php';
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require_once 'ConfigPhp.php';
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require_once 'ConfigJson.php';
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/**
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* Class ConfigManager
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*
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* Singleton, manages all Shaarli's settings.
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*/
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class ConfigManager
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{
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/**
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* @var ConfigManager instance.
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*/
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protected static $instance = null;
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/**
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* @var string Config folder.
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*/
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public static $CONFIG_FILE = 'data/config';
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/**
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* @var string Flag telling a setting is not found.
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*/
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protected static $NOT_FOUND = 'NOT_FOUND';
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/**
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* @var array Loaded config array.
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*/
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protected $loadedConfig;
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/**
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* @var ConfigIO implementation instance.
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*/
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protected $configIO;
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/**
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* Private constructor: new instances not allowed.
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*/
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private function __construct() {}
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/**
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* Cloning isn't allowed either.
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*/
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private function __clone() {}
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/**
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* Return existing instance of PluginManager, or create it.
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*
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* @return ConfigManager instance.
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*/
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public static function getInstance()
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{
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if (!(self::$instance instanceof self)) {
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self::$instance = new self();
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self::$instance->initialize();
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}
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return self::$instance;
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}
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/**
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* Reset the ConfigManager instance.
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*/
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public static function reset()
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{
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self::$instance = null;
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return self::getInstance();
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}
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/**
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* Rebuild the loaded config array from config files.
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*/
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public function reload()
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{
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$this->load();
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}
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/**
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* Initialize the ConfigIO and loaded the conf.
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*/
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protected function initialize()
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{
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if (! file_exists(self::$CONFIG_FILE .'.php')) {
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$this->configIO = new ConfigJson();
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} else {
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$this->configIO = new ConfigPhp();
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}
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$this->load();
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}
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/**
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* Load configuration in the ConfigurationManager.
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*/
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protected function load()
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{
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$this->loadedConfig = $this->configIO->read($this->getConfigFile());
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$this->setDefaultValues();
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}
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/**
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* Get a setting.
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*
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* Supports nested settings with dot separated keys.
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* Eg. 'config.stuff.option' will find $conf[config][stuff][option],
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* or in JSON:
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* { "config": { "stuff": {"option": "mysetting" } } } }
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*
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* @param string $setting Asked setting, keys separated with dots.
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* @param string $default Default value if not found.
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*
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* @return mixed Found setting, or the default value.
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*/
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public function get($setting, $default = '')
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{
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// During the ConfigIO transition, map legacy settings to the new ones.
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if ($this->configIO instanceof ConfigPhp && isset(ConfigPhp::$LEGACY_KEYS_MAPPING[$setting])) {
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$setting = ConfigPhp::$LEGACY_KEYS_MAPPING[$setting];
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}
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$settings = explode('.', $setting);
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$value = self::getConfig($settings, $this->loadedConfig);
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if ($value === self::$NOT_FOUND) {
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return $default;
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}
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return $value;
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}
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/**
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* Set a setting, and eventually write it.
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*
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* Supports nested settings with dot separated keys.
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*
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* @param string $setting Asked setting, keys separated with dots.
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* @param string $value Value to set.
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* @param bool $write Write the new setting in the config file, default false.
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* @param bool $isLoggedIn User login state, default false.
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*
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* @throws Exception Invalid
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*/
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public function set($setting, $value, $write = false, $isLoggedIn = false)
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{
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if (empty($setting) || ! is_string($setting)) {
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throw new Exception('Invalid setting key parameter. String expected, got: '. gettype($setting));
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}
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// During the ConfigIO transition, map legacy settings to the new ones.
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if ($this->configIO instanceof ConfigPhp && isset(ConfigPhp::$LEGACY_KEYS_MAPPING[$setting])) {
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$setting = ConfigPhp::$LEGACY_KEYS_MAPPING[$setting];
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}
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$settings = explode('.', $setting);
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self::setConfig($settings, $value, $this->loadedConfig);
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if ($write) {
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$this->write($isLoggedIn);
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}
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}
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/**
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* Check if a settings exists.
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*
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* Supports nested settings with dot separated keys.
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*
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* @param string $setting Asked setting, keys separated with dots.
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*
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* @return bool true if the setting exists, false otherwise.
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*/
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public function exists($setting)
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{
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// During the ConfigIO transition, map legacy settings to the new ones.
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if ($this->configIO instanceof ConfigPhp && isset(ConfigPhp::$LEGACY_KEYS_MAPPING[$setting])) {
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$setting = ConfigPhp::$LEGACY_KEYS_MAPPING[$setting];
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}
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$settings = explode('.', $setting);
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$value = self::getConfig($settings, $this->loadedConfig);
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if ($value === self::$NOT_FOUND) {
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return false;
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}
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return true;
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}
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/**
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* Call the config writer.
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*
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* @param bool $isLoggedIn User login state.
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*
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* @return bool True if the configuration has been successfully written, false otherwise.
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*
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* @throws MissingFieldConfigException: a mandatory field has not been provided in $conf.
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* @throws UnauthorizedConfigException: user is not authorize to change configuration.
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* @throws IOException: an error occurred while writing the new config file.
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*/
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public function write($isLoggedIn)
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{
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// These fields are required in configuration.
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$mandatoryFields = array(
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'credentials.login',
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'credentials.hash',
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'credentials.salt',
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'security.session_protection_disabled',
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'general.timezone',
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'general.title',
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'general.header_link',
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'general.default_private_links',
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'extras.redirector',
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);
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// Only logged in user can alter config.
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if (is_file(self::$CONFIG_FILE) && !$isLoggedIn) {
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throw new UnauthorizedConfigException();
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}
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// Check that all mandatory fields are provided in $conf.
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foreach ($mandatoryFields as $field) {
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if (! $this->exists($field)) {
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throw new MissingFieldConfigException($field);
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}
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}
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return $this->configIO->write($this->getConfigFile(), $this->loadedConfig);
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}
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/**
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* Get the configuration file path.
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*
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* @return string Config file path.
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*/
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public function getConfigFile()
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{
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return self::$CONFIG_FILE . $this->configIO->getExtension();
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}
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/**
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* Recursive function which find asked setting in the loaded config.
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*
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* @param array $settings Ordered array which contains keys to find.
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* @param array $conf Loaded settings, then sub-array.
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*
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* @return mixed Found setting or NOT_FOUND flag.
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*/
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protected static function getConfig($settings, $conf)
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{
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if (!is_array($settings) || count($settings) == 0) {
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return self::$NOT_FOUND;
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}
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$setting = array_shift($settings);
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if (!isset($conf[$setting])) {
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return self::$NOT_FOUND;
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}
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if (count($settings) > 0) {
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return self::getConfig($settings, $conf[$setting]);
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}
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return $conf[$setting];
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}
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/**
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* Recursive function which find asked setting in the loaded config.
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*
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* @param array $settings Ordered array which contains keys to find.
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* @param mixed $value
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* @param array $conf Loaded settings, then sub-array.
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*
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* @return mixed Found setting or NOT_FOUND flag.
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*/
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protected static function setConfig($settings, $value, &$conf)
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{
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if (!is_array($settings) || count($settings) == 0) {
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return self::$NOT_FOUND;
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}
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$setting = array_shift($settings);
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if (count($settings) > 0) {
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return self::setConfig($settings, $value, $conf[$setting]);
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}
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$conf[$setting] = $value;
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}
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/**
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* Set a bunch of default values allowing Shaarli to start without a config file.
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*/
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protected function setDefaultValues()
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{
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// Data subdirectory
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$this->setEmpty('path.data_dir', 'data');
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// Main configuration file
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$this->setEmpty('path.config', 'data/config.php');
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// Link datastore
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$this->setEmpty('path.datastore', 'data/datastore.php');
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// Banned IPs
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$this->setEmpty('path.ban_file', 'data/ipbans.php');
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// Processed updates file.
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$this->setEmpty('path.updates', 'data/updates.txt');
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// Access log
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$this->setEmpty('path.log', 'data/log.txt');
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// For updates check of Shaarli
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$this->setEmpty('path.update_check', 'data/lastupdatecheck.txt');
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// Set ENABLE_UPDATECHECK to disabled by default.
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$this->setEmpty('general.check_updates', false);
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// RainTPL cache directory (keep the trailing slash!)
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$this->setEmpty('path.raintpl_tmp', 'tmp/');
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// Raintpl template directory (keep the trailing slash!)
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$this->setEmpty('path.raintpl_tpl', 'tpl/');
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// Thumbnail cache directory
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$this->setEmpty('path.thumbnails_cache', 'cache');
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// Atom & RSS feed cache directory
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$this->setEmpty('path.page_cache', 'pagecache');
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// Ban IP after this many failures
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$this->setEmpty('security.ban_after', 4);
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// Ban duration for IP address after login failures (in seconds)
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$this->setEmpty('security.ban_after', 1800);
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// Feed options
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// Enable RSS permalinks by default.
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// This corresponds to the default behavior of shaarli before this was added as an option.
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$this->setEmpty('general.rss_permalinks', true);
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// If true, an extra "ATOM feed" button will be displayed in the toolbar
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$this->setEmpty('extras.show_atom', false);
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// Link display options
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$this->setEmpty('extras.hide_public_links', false);
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$this->setEmpty('extras.hide_timestamps', false);
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$this->setEmpty('general.links_per_page', 20);
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// Private checkbox is checked by default
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$this->setEmpty('general.default_private_links', false);
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// Open Shaarli (true): anyone can add/edit/delete links without having to login
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$this->setEmpty('extras.open_shaarli', false);
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// Thumbnails
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// Display thumbnails in links
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$this->setEmpty('general.enable_thumbnails', true);
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// Store thumbnails in a local cache
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$this->setEmpty('general.enable_localcache', true);
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// Update check frequency for Shaarli. 86400 seconds=24 hours
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$this->setEmpty('general.check_updates_branch', 'stable');
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$this->setEmpty('general.check_updates_interval', 86400);
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$this->setEmpty('extras.redirector', '');
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$this->setEmpty('extras.redirector_encode_url', true);
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// Enabled plugins.
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$this->setEmpty('general.enabled_plugins', array('qrcode'));
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// Initialize plugin parameters array.
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$this->setEmpty('plugins', array());
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}
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/**
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* Set only if the setting does not exists.
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*
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* @param string $key Setting key.
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* @param mixed $value Setting value.
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*/
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protected function setEmpty($key, $value)
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{
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if (! $this->exists($key)) {
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$this->set($key, $value);
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}
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}
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/**
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* @return ConfigIO
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*/
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public function getConfigIO()
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{
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return $this->configIO;
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}
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/**
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* @param ConfigIO $configIO
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*/
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public function setConfigIO($configIO)
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{
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$this->configIO = $configIO;
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}
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}
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/**
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* Exception used if a mandatory field is missing in given configuration.
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*/
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class MissingFieldConfigException extends Exception
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{
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public $field;
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/**
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* Construct exception.
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*
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* @param string $field field name missing.
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*/
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public function __construct($field)
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{
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$this->field = $field;
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$this->message = 'Configuration value is required for '. $this->field;
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}
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}
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/**
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* Exception used if an unauthorized attempt to edit configuration has been made.
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*/
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class UnauthorizedConfigException extends Exception
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{
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/**
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* Construct exception.
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*/
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public function __construct()
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{
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$this->message = 'You are not authorized to alter config.';
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}
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}
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