Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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friendica/src/Core/Config/Configuration.php

162 lines
4.4 KiB

<?php
namespace Friendica\Core\Config;
/**
* This class is responsible for all system-wide configuration values in Friendica
* There are two types of storage
* - The Config-Files (loaded into the FileCache @see Cache\IConfigCache )
* - The Config-DB-Table (per Config-DB-adapter @see Adapter\IConfigAdapter )
*/
class Configuration
{
/**
* The blacklist of configuration settings, which should not get saved to the backend
* @var array
*/
private $configSaveBlacklist = [
'config' => [
'hostname' => true,
]
];
/**
* @var Cache\IConfigCache
*/
private $configCache;
/**
* @var Adapter\IConfigAdapter
*/
private $configAdapter;
/**
* @param Cache\IConfigCache $configCache The configuration cache (based on the config-files)
* @param Adapter\IConfigAdapter $configAdapter The configuration DB-backend
*/
public function __construct(Cache\IConfigCache $configCache, Adapter\IConfigAdapter $configAdapter)
{
$this->configCache = $configCache;
$this->configAdapter = $configAdapter;
$this->load();
}
/**
* Returns the Config Cache
*
* @return Cache\IConfigCache
*/
public function getCache()
{
return $this->configCache;
}
/**
* @brief Loads all configuration values of family into a cached storage.
*
* All configuration values of the system are stored in the cache ( @see IConfigCache )
*
* @param string $cat The category of the configuration value
*
* @return void
*/
public function load($cat = 'config')
{
// If not connected, do nothing
if (!$this->configAdapter->isConnected()) {
return;
}
// load the whole category out of the DB into the cache
$this->configCache->load($this->configAdapter->load($cat), true);
}
/**
* @brief Get a particular user's config variable given the category name
* ($cat) and a $key.
*
* Get a particular config value from the given category ($cat)
* and the $key from a cached storage either from the $this->configAdapter
* (@see IConfigAdapter ) or from the $this->configCache (@see IConfigCache ).
*
* @param string $cat The category of the configuration value
* @param string $key The configuration key to query
* @param mixed $default_value optional, The value to return if key is not set (default: null)
* @param boolean $refresh optional, If true the config is loaded from the db and not from the cache (default: false)
*
* @return mixed Stored value or null if it does not exist
*/
public function get($cat, $key, $default_value = null, $refresh = false)
{
// if the value isn't loaded or refresh is needed, load it to the cache
if ($this->configAdapter->isConnected() &&
(!$this->configAdapter->isLoaded($cat, $key) ||
$refresh)) {
$dbvalue = $this->configAdapter->get($cat, $key);
if (isset($dbvalue)) {
$this->configCache->set($cat, $key, $dbvalue);
return $dbvalue;
}
}
// use the config cache for return
$result = $this->configCache->get($cat, $key);
return (isset($result)) ? $result : $default_value;
}
/**
* @brief Sets a configuration value for system config
*
* Stores a config value ($value) in the category ($cat) under the key ($key)
*
* Note: Please do not store booleans - convert to 0/1 integer values!
*
* @param string $cat The category of the configuration value
* @param string $key The configuration key to set
* @param mixed $value The value to store
*
* @return bool Operation success
*/
public function set($cat, $key, $value)
{
// set the cache first
$cached = $this->configCache->set($cat, $key, $value);
// If there is no connected adapter, we're finished
if (!$this->configAdapter->isConnected() || !empty($this->configSaveBlacklist[$cat][$key])) {
return $cached;
}
$stored = $this->configAdapter->set($cat, $key, $value);
return $cached && $stored;
}
/**
* @brief Deletes the given key from the system configuration.
*
* Removes the configured value from the stored cache in $this->configCache
* (@see ConfigCache ) and removes it from the database (@see IConfigAdapter ).
*
* @param string $cat The category of the configuration value
* @param string $key The configuration key to delete
*
* @return bool
*/
public function delete($cat, $key)
{
$cacheRemoved = $this->configCache->delete($cat, $key);
if (!$this->configAdapter->isConnected()) {
return $cacheRemoved;
}
$storeRemoved = $this->configAdapter->delete($cat, $key);
return $cacheRemoved || $storeRemoved;
}
}