friendica/src/Core/Config/PConfiguration.php

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<?php
namespace Friendica\Core\Config;
/**
* This class is responsible for the user-specific configuration values in Friendica
* The values are set through the Config-DB-Table (per Config-DB-adapter @see Adapter\IPConfigAdapter )
*
* The configuration cache (@see Cache\IPConfigCache ) is used for temporary caching of database calls. This will
* increase the performance.
*/
class PConfiguration
{
/**
* @var Cache\PConfigCache
*/
private $configCache;
/**
* @var Adapter\IPConfigAdapter
*/
private $configAdapter;
/**
* @param Cache\PConfigCache $configCache The configuration cache
* @param Adapter\IPConfigAdapter $configAdapter The configuration DB-backend
*/
public function __construct(Cache\PConfigCache $configCache, Adapter\IPConfigAdapter $configAdapter)
{
$this->configCache = $configCache;
$this->configAdapter = $configAdapter;
}
/**
* @brief Loads all configuration values of a user's config family into a cached storage.
*
* All configuration values of the given user are stored with the $uid in
* the cache ( @see IPConfigCache )
*
* @param string $uid The user_id
* @param string $cat The category of the configuration value
*
* @return void
*/
public function load($uid, $cat = 'config')
{
// If not connected, do nothing
if (!$this->configAdapter->isConnected()) {
return;
}
// load the whole category out of the DB into the cache
$this->configCache->load($uid, $this->configAdapter->load($uid, $cat));
}
/**
* @brief Get a particular user's config variable given the category name
* ($cat) and a key.
*
* Get a particular user's config value from the given category ($cat)
* and the $key with the $uid from a cached storage either from the $this->configAdapter
* (@see IConfigAdapter ) or from the $this->configCache (@see IConfigCache ).
*
* @param string $uid The user_id
* @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 $refresh optional, If true the config is loaded from the db and not from the cache (default: false)
*
* @return mixed Stored value or null if it does not exist
*/
public function get($uid, $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() &&
(!$this->configAdapter->isLoaded($uid, $cat, $key) ||
$refresh)) {
$dbValue = $this->configAdapter->get($uid, $cat, $key);
if (isset($dbValue)) {
$this->configCache->set($uid, $cat, $key, $dbValue);
return $dbValue;
}
}
// use the config cache for return
$result = $this->configCache->get($uid, $cat, $key);
return (isset($result)) ? $result : $default_value;
}
/**
* @brief Sets a configuration value for a user
*
* Stores a config value ($value) in the category ($family) under the key ($key)
* for the user_id $uid.
*
* @note Please do not store booleans - convert to 0/1 integer values!
*
* @param string $uid The user_id
* @param string $cat The category of the configuration value
* @param string $key The configuration key to set
* @param mixed $value The value to store
*
* @return bool Operation success
*/
public function set($uid, $cat, $key, $value)
{
// set the cache first
$cached = $this->configCache->set($uid, $cat, $key, $value);
// If there is no connected adapter, we're finished
if (!$this->configAdapter->isConnected()) {
return $cached;
}
$stored = $this->configAdapter->set($uid, $cat, $key, $value);
return $cached && $stored;
}
/**
* @brief Deletes the given key from the users's configuration.
*
* Removes the configured value from the stored cache in $this->configCache
* (@see ConfigCache ) and removes it from the database (@see IConfigAdapter )
* with the given $uid.
*
* @param string $uid The user_id
* @param string $cat The category of the configuration value
* @param string $key The configuration key to delete
*
* @return bool
*/
public function delete($uid, $cat, $key)
{
$cacheRemoved = $this->configCache->delete($uid, $cat, $key);
if (!$this->configAdapter->isConnected()) {
return $cacheRemoved;
}
$storeRemoved = $this->configAdapter->delete($uid, $cat, $key);
return $cacheRemoved || $storeRemoved;
}
}