MyShaarli/application/config/ConfigManager.php

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<?php
namespace Shaarli\Config;
use Shaarli\Config\Exception\MissingFieldConfigException;
use Shaarli\Config\Exception\UnauthorizedConfigException;
/**
* Class ConfigManager
*
* Manages all Shaarli's settings.
* See the documentation for more information on settings:
* - doc/Shaarli-configuration.html
* - https://github.com/shaarli/Shaarli/wiki/Shaarli-configuration
*/
class ConfigManager
{
/**
* @var string Flag telling a setting is not found.
*/
protected static $NOT_FOUND = 'NOT_FOUND';
public static $DEFAULT_PLUGINS = array('qrcode');
/**
* @var string Config folder.
*/
protected $configFile;
/**
* @var array Loaded config array.
*/
protected $loadedConfig;
/**
* @var ConfigIO implementation instance.
*/
protected $configIO;
/**
* Constructor.
*
* @param string $configFile Configuration file path without extension.
*/
public function __construct($configFile = 'data/config')
{
$this->configFile = $configFile;
$this->initialize();
}
/**
* Reset the ConfigManager instance.
*/
public function reset()
{
$this->initialize();
}
/**
* Rebuild the loaded config array from config files.
*/
public function reload()
{
$this->load();
}
/**
* Initialize the ConfigIO and loaded the conf.
*/
protected function initialize()
{
if (file_exists($this->configFile . '.php')) {
$this->configIO = new ConfigPhp();
} else {
$this->configIO = new ConfigJson();
}
$this->load();
}
/**
* Load configuration in the ConfigurationManager.
*/
protected function load()
{
$this->loadedConfig = $this->configIO->read($this->getConfigFileExt());
$this->setDefaultValues();
}
/**
* Get a setting.
*
* Supports nested settings with dot separated keys.
* Eg. 'config.stuff.option' will find $conf[config][stuff][option],
* or in JSON:
* { "config": { "stuff": {"option": "mysetting" } } } }
*
* @param string $setting Asked setting, keys separated with dots.
* @param string $default Default value if not found.
*
* @return mixed Found setting, or the default value.
*/
public function get($setting, $default = '')
{
// During the ConfigIO transition, map legacy settings to the new ones.
if ($this->configIO instanceof ConfigPhp && isset(ConfigPhp::$LEGACY_KEYS_MAPPING[$setting])) {
$setting = ConfigPhp::$LEGACY_KEYS_MAPPING[$setting];
}
$settings = explode('.', $setting);
$value = self::getConfig($settings, $this->loadedConfig);
if ($value === self::$NOT_FOUND) {
return $default;
}
return $value;
}
/**
* Set a setting, and eventually write it.
*
* Supports nested settings with dot separated keys.
*
* @param string $setting Asked setting, keys separated with dots.
* @param string $value Value to set.
* @param bool $write Write the new setting in the config file, default false.
* @param bool $isLoggedIn User login state, default false.
*
* @throws \Exception Invalid
*/
public function set($setting, $value, $write = false, $isLoggedIn = false)
{
if (empty($setting) || ! is_string($setting)) {
throw new \Exception('Invalid setting key parameter. String expected, got: '. gettype($setting));
}
// During the ConfigIO transition, map legacy settings to the new ones.
if ($this->configIO instanceof ConfigPhp && isset(ConfigPhp::$LEGACY_KEYS_MAPPING[$setting])) {
$setting = ConfigPhp::$LEGACY_KEYS_MAPPING[$setting];
}
$settings = explode('.', $setting);
self::setConfig($settings, $value, $this->loadedConfig);
if ($write) {
$this->write($isLoggedIn);
}
}
/**
* Check if a settings exists.
*
* Supports nested settings with dot separated keys.
*
* @param string $setting Asked setting, keys separated with dots.
*
* @return bool true if the setting exists, false otherwise.
*/
public function exists($setting)
{
// During the ConfigIO transition, map legacy settings to the new ones.
if ($this->configIO instanceof ConfigPhp && isset(ConfigPhp::$LEGACY_KEYS_MAPPING[$setting])) {
$setting = ConfigPhp::$LEGACY_KEYS_MAPPING[$setting];
}
$settings = explode('.', $setting);
$value = self::getConfig($settings, $this->loadedConfig);
if ($value === self::$NOT_FOUND) {
return false;
}
return true;
}
/**
* Call the config writer.
*
* @param bool $isLoggedIn User login state.
*
* @return bool True if the configuration has been successfully written, false otherwise.
*
* @throws MissingFieldConfigException: a mandatory field has not been provided in $conf.
* @throws UnauthorizedConfigException: user is not authorize to change configuration.
* @throws \IOException: an error occurred while writing the new config file.
*/
public function write($isLoggedIn)
{
// These fields are required in configuration.
$mandatoryFields = array(
'credentials.login',
'credentials.hash',
'credentials.salt',
'security.session_protection_disabled',
'general.timezone',
'general.title',
'general.header_link',
'privacy.default_private_links',
'redirector.url',
);
// Only logged in user can alter config.
if (is_file($this->getConfigFileExt()) && !$isLoggedIn) {
throw new UnauthorizedConfigException();
}
// Check that all mandatory fields are provided in $conf.
foreach ($mandatoryFields as $field) {
if (! $this->exists($field)) {
throw new MissingFieldConfigException($field);
}
}
return $this->configIO->write($this->getConfigFileExt(), $this->loadedConfig);
}
/**
* Set the config file path (without extension).
*
* @param string $configFile File path.
*/
public function setConfigFile($configFile)
{
$this->configFile = $configFile;
}
/**
* Return the configuration file path (without extension).
*
* @return string Config path.
*/
public function getConfigFile()
{
return $this->configFile;
}
/**
* Get the configuration file path with its extension.
*
* @return string Config file path.
*/
public function getConfigFileExt()
{
return $this->configFile . $this->configIO->getExtension();
}
/**
* Recursive function which find asked setting in the loaded config.
*
* @param array $settings Ordered array which contains keys to find.
* @param array $conf Loaded settings, then sub-array.
*
* @return mixed Found setting or NOT_FOUND flag.
*/
protected static function getConfig($settings, $conf)
{
if (!is_array($settings) || count($settings) == 0) {
return self::$NOT_FOUND;
}
$setting = array_shift($settings);
if (!isset($conf[$setting])) {
return self::$NOT_FOUND;
}
if (count($settings) > 0) {
return self::getConfig($settings, $conf[$setting]);
}
return $conf[$setting];
}
/**
* Recursive function which find asked setting in the loaded config.
*
* @param array $settings Ordered array which contains keys to find.
* @param mixed $value
* @param array $conf Loaded settings, then sub-array.
*
* @return mixed Found setting or NOT_FOUND flag.
*/
protected static function setConfig($settings, $value, &$conf)
{
if (!is_array($settings) || count($settings) == 0) {
return self::$NOT_FOUND;
}
$setting = array_shift($settings);
if (count($settings) > 0) {
return self::setConfig($settings, $value, $conf[$setting]);
}
$conf[$setting] = $value;
}
/**
* Set a bunch of default values allowing Shaarli to start without a config file.
*/
protected function setDefaultValues()
{
$this->setEmpty('resource.data_dir', 'data');
$this->setEmpty('resource.config', 'data/config.php');
$this->setEmpty('resource.datastore', 'data/datastore.php');
$this->setEmpty('resource.ban_file', 'data/ipbans.php');
$this->setEmpty('resource.updates', 'data/updates.txt');
$this->setEmpty('resource.log', 'data/log.txt');
$this->setEmpty('resource.update_check', 'data/lastupdatecheck.txt');
$this->setEmpty('resource.raintpl_tpl', 'tpl/');
$this->setEmpty('resource.theme', 'default');
$this->setEmpty('resource.raintpl_tmp', 'tmp/');
$this->setEmpty('resource.thumbnails_cache', 'cache');
$this->setEmpty('resource.page_cache', 'pagecache');
$this->setEmpty('security.ban_after', 4);
$this->setEmpty('security.ban_duration', 1800);
$this->setEmpty('security.session_protection_disabled', false);
$this->setEmpty('security.open_shaarli', false);
$this->setEmpty('general.header_link', '?');
$this->setEmpty('general.links_per_page', 20);
$this->setEmpty('general.enabled_plugins', self::$DEFAULT_PLUGINS);
$this->setEmpty('updates.check_updates', false);
$this->setEmpty('updates.check_updates_branch', 'stable');
$this->setEmpty('updates.check_updates_interval', 86400);
$this->setEmpty('feed.rss_permalinks', true);
$this->setEmpty('feed.show_atom', true);
$this->setEmpty('privacy.default_private_links', false);
$this->setEmpty('privacy.hide_public_links', false);
$this->setEmpty('privacy.hide_timestamps', false);
$this->setEmpty('thumbnail.enable_thumbnails', true);
$this->setEmpty('thumbnail.enable_localcache', true);
$this->setEmpty('redirector.url', '');
$this->setEmpty('redirector.encode_url', true);
$this->setEmpty('plugins', array());
}
/**
* Set only if the setting does not exists.
*
* @param string $key Setting key.
* @param mixed $value Setting value.
*/
public function setEmpty($key, $value)
{
if (! $this->exists($key)) {
$this->set($key, $value);
}
}
/**
* @return ConfigIO
*/
public function getConfigIO()
{
return $this->configIO;
}
/**
* @param ConfigIO $configIO
*/
public function setConfigIO($configIO)
{
$this->configIO = $configIO;
}
}