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Configuration.php
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<?php
/**
* Aomebo - a module-based MVC framework for PHP 5.3 and higher
*
* Copyright 2010 - 2015 by Christian Johansson <[email protected]>
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
* @license LGPL version 3
* @see http://www.aomebo.org/ or https://github.com/cjohansson/Aomebo-Framework
*/
/**
*
*/
namespace Aomebo
{
/**
* This class first loads structure internally and externally, first from
* PHP sources, then from YML sources. After that it loads configuration internally
* and externally, first from PHP sources and then from YML sources. It also validates
* the configuration with the structure and uses filesystem cache to speed up this loading.
*
* @method static \Aomebo\Configuration getInstance()
*/
class Configuration extends Singleton
{
/**
* @var string
*/
const CONFIG_FILENAME = 'configuration';
/**
* @var string
*/
const STRUCTURE_FILENAME = 'structure';
/**
* @var string
*/
const STRUCTURE_KEY_TYPE = 'type';
/**
* @var string
*/
const STRUCTURE_KEY_REQUIRED = 'required';
/**
* @var string
*/
const STRUCTURE_KEY_DEFAULT = 'default';
/**
* @var string
*/
const STRUCTURE_TYPE_BOOLEAN = 'boolean';
/**
* @var string
*/
const STRUCTURE_TYPE_STRING = 'string';
/**
* @var string
*/
const STRUCTURE_TYPE_INTEGER = 'integer';
/**
* @var string
*/
const STRUCTURE_TYPE_INTEGER_UNSIGNED = 'unsigned integer';
/**
* @var string
*/
const STRUCTURE_TYPE_ARRAY = 'array';
/**
* @var string
*/
const STRUCTURE_TYPE_ARRAY_ASSOCIATIVE = 'associative array';
/**
* @internal
* @static
* @var array
*/
private static $_structure;
/**
* @internal
* @static
* @var array
*/
private static $_structureKeys;
/**
* @internal
* @static
* @var array
*/
private static $_configuration;
/**
* @internal
* @static
* @var array
*/
private static $_settings;
/**
* @internal
* @static
* @var string
*/
private static $_internalConfigurationFilename;
/**
* @internal
* @static
* @var string
*/
private static $_externalConfigurationFilename;
/**
* @internal
* @static
* @var string
*/
private static $_internalStructureFilename;
/**
* @internal
* @static
* @var string
*/
private static $_externalStructureFilename;
/**
* @internal
* @static
* @var bool
*/
private static $_isLoaded = false;
/**
* @internal
* @static
* @var bool
*/
private static $_spycLoaded = false;
/**
* @internal
* @static
* @var bool
*/
private static $_hasSiteConfiguration = false;
/**
* @internal
* @static
* @var array
*/
private static $_keyToValueCache = array();
/**
*
*/
public function __construct()
{
parent::__construct();
if (!$this->_isConstructed()) {
$this->_flagThisConstructed();
}
}
/**
* @static
* @return bool
*/
public static function hasSiteConfiguration()
{
return self::$_hasSiteConfiguration;
}
/**
* @static
* @return bool
*/
public static function isLoaded()
{
return self::$_isLoaded;
}
/**
* This method merges array on a multidimension level.
*
* @internal
* @static
* @param array $original
* @param array $new
*/
public static function multiDimensionalArrayMerge(& $original, $new)
{
if (is_array($original)
&& is_array($new)
) {
foreach ($new as $key => & $value)
{
if (is_array($value)) {
if (isset($original[$key])) {
if (is_array($original[$key])) {
self::multiDimensionalArrayMerge(
$original[$key],
$new[$key]);
} else {
$original[$key] =
$new[$key];
}
} else {
$original[$key] =
$new[$key];
}
} else {
$original[$key] = $new;
}
}
}
}
/**
* This method tries to load the configuration.
*
* @static
* @param string [$internalConfigurationFilename = '']
* @param string [$externalConfigurationFilename = '']
* @param string [$internalStructureFilename = '']
* @param string [$externalStructureFilename = '']
* @param string|null [$configurationAdapter = null]
* @throws \Exception
* @return bool
*/
public static function load(
$internalConfigurationFilename = '',
$externalConfigurationFilename = '',
$internalStructureFilename = '',
$externalStructureFilename = '')
{
$cacheString = '';
// Use alternate internal config-file if requested
if (!empty($internalConfigurationFilename)) {
self::$_internalConfigurationFilename = $internalConfigurationFilename;
} else {
self::$_internalConfigurationFilename = self::CONFIG_FILENAME;
}
// Build absolute path
$internalConfigurationFilename =
_SYSTEM_ROOT_ . self::$_internalConfigurationFilename;
if (file_exists($internalConfigurationFilename . '.php')
&& strtolower($internalConfigurationFilename . '.php') !==
strtolower(__FILE__)
) {
$cacheString .=
'&ICTime=' . filemtime($internalConfigurationFilename . '.php')
. '&ICSize=' . filesize($internalConfigurationFilename . '.php');
} else if (file_exists($internalConfigurationFilename . '.yml')) {
$cacheString .=
'&ICTime=' . filemtime($internalConfigurationFilename . '.yml')
. '&ICSize=' . filesize($internalConfigurationFilename . '.yml');
}
// Use alternate external config-file if requested
if (!empty($externalConfigurationFilename)) {
self::$_externalConfigurationFilename = $externalConfigurationFilename;
} else {
self::$_externalConfigurationFilename = self::CONFIG_FILENAME;
}
// Build absolute path
$externalConfigurationFilename =
_SITE_ROOT_ . self::$_externalConfigurationFilename;
if (file_exists($externalConfigurationFilename . '.php')
&& strtolower($externalConfigurationFilename . '.php') !==
strtolower(__FILE__)
) {
self::$_hasSiteConfiguration = true;
$cacheString .=
'&ECTime=' . filemtime($externalConfigurationFilename . '.php')
. '&ECSize=' . filesize($externalConfigurationFilename . '.php');
} else if (file_exists($externalConfigurationFilename . '.yml')) {
self::$_hasSiteConfiguration = true;
$cacheString .=
'&ECTime=' . filemtime($externalConfigurationFilename . '.yml')
. '&ECSize=' . filesize($externalConfigurationFilename . '.yml');
}
// Use alternate internal structure-file if requested
if (!empty($internalStructureFilename)) {
self::$_internalStructureFilename = $internalStructureFilename;
} else {
self::$_internalStructureFilename = self::STRUCTURE_FILENAME;
}
// Build absolute path
$internalStructureFilename =
_SYSTEM_ROOT_ . self::$_internalStructureFilename;
if (file_exists($internalStructureFilename . '.php')) {
$cacheString .=
'&ISTime=' . filemtime($internalStructureFilename . '.php')
. '&ISSize=' . filesize($internalStructureFilename . '.php');
} else if (file_exists($internalStructureFilename . '.yml')) {
$cacheString .=
'&ISTime=' . filemtime($internalStructureFilename . '.yml')
. '&ISSize=' . filesize($internalStructureFilename . '.yml');
}
// Use alternate external structure-file if requested
if (!empty($externalStructureFilename)) {
self::$_externalStructureFilename = $externalStructureFilename;
} else {
self::$_externalStructureFilename = self::STRUCTURE_FILENAME;
}
// Build absolute path
$externalStructureFilename =
_SITE_ROOT_ . self::$_externalStructureFilename;
if (file_exists($externalStructureFilename . '.php')) {
$cacheString .=
'&ESTime=' . filemtime($externalStructureFilename . '.php')
. '&ESSize=' . filesize($externalStructureFilename . '.php');
} else if (file_exists($externalStructureFilename . '.yml')) {
$cacheString .=
'&ESTime=' . filemtime($externalStructureFilename . '.yml')
. '&ESSize=' . filesize($externalStructureFilename . '.yml');
}
/**
* Cache parameters, static.
*/
$cacheParameters = 'Configuration';
/**
* Cache key, unique per:
* - Filemtime of configuration files
*/
$cacheKey = md5($cacheString);
if (\Aomebo\Cache\System::cacheExists(
$cacheParameters,
$cacheKey,
\Aomebo\Cache\System::CACHE_STORAGE_LOCATION_FILESYSTEM)
) {
if ($cacheData = \Aomebo\Cache\System::loadCache(
$cacheParameters,
$cacheKey,
\Aomebo\Cache\System::FORMAT_JSON_ENCODE)
) {
if (isset($cacheData['configuration'],
$cacheData['structure'],
$cacheData['settings'])
&& is_array($cacheData['configuration'])
&& is_array($cacheData['structure'])
&& is_array($cacheData['settings'])
&& count($cacheData['structure']) > 0
&& count($cacheData['settings']) > 0
) {
self::$_configuration = $cacheData['configuration'];
self::$_structure = $cacheData['structure'];
self::$_settings = $cacheData['settings'];
self::$_isLoaded = true;
return true;
} else {
\Aomebo\Cache\System::clearCache(
$cacheParameters,
null,
\Aomebo\Cache\System::CACHE_STORAGE_LOCATION_FILESYSTEM
);
Throw new \Exception(
self::systemTranslate(
'Invalid configuration cache, cleared caches.')
);
}
} else {
\Aomebo\Cache\System::clearCache(
$cacheParameters,
null,
\Aomebo\Cache\System::CACHE_STORAGE_LOCATION_FILESYSTEM
);
Throw new \Exception(
self::systemTranslate(
'Invalid configuration cache, cleared caches.')
);
}
} else {
\Aomebo\Cache\System::clearCache(
$cacheParameters,
null,
\Aomebo\Cache\System::CACHE_STORAGE_LOCATION_FILESYSTEM
);
\Aomebo\Associatives\Parser::cleanAssociativesCache();
\Aomebo\Associatives\Parser::cleanDependenciesCache();
self::$_structure = array();
self::$_configuration = array();
$internalStructure = array();
$convertQueue = array();
// Does internal structure-file exists?
if (file_exists($internalStructureFilename . '.php')) {
$internalStructure = self::loadPhpConfiguration(
$internalStructureFilename . '.php'
);
} else if (file_exists($internalStructureFilename . '.yml')) {
$internalStructure = self::loadYmlConfiguration(
$internalStructureFilename . '.yml'
);
// Convert YML to PHP
$convertQueue[] = array(
$internalStructureFilename . '.php',
$internalStructure
);
}
if (count($internalStructure) > 0) {
self::multiDimensionalArrayMerge(
self::$_structure,
$internalStructure
);
}
$internalConfiguration = array();
// Does internal configuration-file exists?
if (file_exists($internalConfigurationFilename . '.php')
&& strtolower($internalConfigurationFilename . '.php') !==
strtolower(__FILE__)
) {
$internalConfiguration = self::loadPhpConfiguration(
$internalConfigurationFilename . '.php'
);
} else if (file_exists($internalConfigurationFilename . '.yml')) {
$internalConfiguration = self::loadYmlConfiguration(
$internalConfigurationFilename . '.yml'
);
// Convert YML to PHP
$convertQueue[] = array(
$internalConfigurationFilename . '.php',
$internalConfiguration
);
}
if (count($internalConfiguration) > 0) {
self::multiDimensionalArrayMerge(
self::$_configuration,
$internalConfiguration
);
}
$externalStructure = array();
// Does external structure-file exists?
if (file_exists($externalStructureFilename . '.php')) {
$externalStructure = self::loadPhpConfiguration(
$externalStructureFilename . '.php'
);
} else if (file_exists($externalStructureFilename . '.yml')) {
$externalStructure = self::loadYmlConfiguration(
$externalStructureFilename . '.yml'
);
// Convert YML to PHP
$convertQueue[] = array(
$externalStructureFilename . '.php',
$externalStructure
);
}
if (count($externalStructure) > 0) {
self::multiDimensionalArrayMerge(
self::$_structure,
$externalStructure
);
}
$externalConfiguration = array();
// Does external config-file exists and is not this file?
if (file_exists($externalConfigurationFilename . '.php')
&& strtolower($externalConfigurationFilename . '.php') !==
strtolower(__FILE__)
) {
$externalConfiguration = self::loadPhpConfiguration(
$externalConfigurationFilename . '.php'
);
} else if (file_exists($externalConfigurationFilename . '.yml')) {
$externalConfiguration = self::loadYmlConfiguration(
$externalConfigurationFilename . '.yml'
);
// Convert YML to PHP
$convertQueue[] = array(
$externalConfigurationFilename . '.php',
$externalConfiguration
);
}
if (count($externalConfiguration) > 0) {
self::multiDimensionalArrayMerge(
self::$_configuration,
$externalConfiguration
);
}
// Does configuration validate?
if (self::_validate()) {
$cacheData = array(
'configuration' => & self::$_configuration,
'structure' => & self::$_structure,
'settings' => & self::$_settings,
);
self::$_isLoaded = true;
\Aomebo\Cache\System::saveCache(
$cacheParameters,
$cacheKey,
$cacheData,
\Aomebo\Cache\System::FORMAT_JSON_ENCODE,
\Aomebo\Cache\System::CACHE_STORAGE_LOCATION_FILESYSTEM
);
// Are any data in convert-queue?
if (\Aomebo\Application::isWritingnabled()
&& count($convertQueue) > 0
) {
foreach ($convertQueue as $convertQueueItem)
{
if (isset($convertQueueItem[0],
$convertQueueItem[1])
) {
self::savePhpConfigurationFile(
$convertQueueItem[0],
$convertQueueItem[1]
);
}
}
}
return true;
}
}
return false;
}
/**
* This method returns whether a setting exists of not.
*
* @static
* @param string $key
* @throws \Exception
* @return bool
*/
public static function hasSetting($key)
{
if (isset($key)) {
$exp = explode(',', $key);
$d = & self::$_settings;
if (is_array($exp)
&& count($exp) > 0
) {
foreach ($exp as $e)
{
if (!isset($d[$e])) {
return false;
} else {
$d = & $d[$e];
}
}
return true;
} else {
if (isset($d[$key])) {
return true;
}
}
} else {
Throw new \Exception(
sprintf(
self::systemTranslate('Invalid parameters "%s"'),
print_r(func_get_args(), true)
)
);
}
return false;
}
/**
* This method retreives setting from configuration.
*
* @static
* @param string $key
* @param bool [$throwException = true]
* @throws \Exception
* @return mixed
*/
public static function getSetting($key, $throwException = true)
{
if (isset($key)) {
if (!isset(self::$_keyToValueCache[$key])) {
self::$_keyToValueCache[$key] = false;
$exp = explode(',', $key);
$d = & self::$_settings;
if (is_array($exp)
&& count($exp) > 0
) {
$found = true;
foreach ($exp as $e)
{
if (!isset($d[$e])) {
if ($throwException) {
Throw new \Exception(
sprintf(
self::systemTranslate(
'Setting-value for key: "%s" not found.'),
$key
)
);
} else {
$found = false;
break;
}
} else {
$d = & $d[$e];
}
}
if ($found) {
self::$_keyToValueCache[$key] = $d;
}
} else {
if (isset($d[$key])) {
self::$_keyToValueCache[$key] = $d[$key];
}
}
}
return self::$_keyToValueCache[$key];
} else {
if ($throwException) {
Throw new \Exception(
sprintf(
self::systemTranslate('Invalid parameters "%s"'),
print_r(func_get_args(), true)
)
);
}
}
return null;
}
/**
* This method saves settings to configuration.
*
* @static
* @param array $settings
* @throws \Exception
* @return boolean
*/
public static function saveSettings($settings)
{
if (isset($settings)
&& is_array($settings)
&& count($settings) > 0
) {
$failedKeys = array();
// Iterate through settings to set
$allOk = true;
foreach ($settings as $key => $value)
{
if (!self::_saveSetting($key, $value)) {
$failedKeys[] = $key;
$allOk = false;
}
}
// Did all go well?
if ($allOk) {
if (self::_flushSettings()) {
return true;
}
}
} else {
Throw new \Exception(
sprintf(
self::systemTranslate('Invalid parameters "%s"'),
print_r(func_get_args(), true)
)
);
}
if (count($failedKeys) > 0) {
Throw new \Exception(
sprintf(
self::systemTranslate(
'Failed to save settings. Failed with saving keys: "%s"'),
implode(',', $failedKeys) . '"'
)
);
} else {
Throw new \Exception(self::systemTranslate('Failed to save settings.'));
}
}
/**
* @static
* @return array
*/
public static function getStructure()
{
return self::$_structure;
}
/**
* This method save a single settings key and value.
*
* @static
* @param $key
* @param $value
* @return bool
*/
public static function saveSetting($key, $value)
{
if (self::_saveSetting($key, $value)) {
if (self::_flushSettings()) {
return true;
}
}
return false;
}
/**
* This method tries to set a value.
*
* @internal
* @static
* @param $key
* @param $value
* @throws \Exception
* @return bool
*/
private static function _saveSetting($key, $value)
{
if (isset($key, $value)) {
$exp = explode(',', $key);
$d = & self::$_settings;
if (is_array($exp)
&& count($exp) > 0
) {
foreach ($exp as $e)
{
if (!isset($d[$e])) {
Throw new \Exception(
sprintf(
self::systemTranslate(
'Setting-value for key: "%s" not found.'),
$key
)
);
} else {
$d = & $d[$e];
}
}
self::$_keyToValueCache[$key] = $value;
$d = $value;
return true;
} else {
if (isset($d[$key])) {
$d[$key] = $value;
self::$_keyToValueCache[$key] = $value;
return true;
} else {
Throw new \Exception(
sprintf(
self::systemTranslate(
'Setting-value for key: "%s" not found.'),
$key
)
);
}
}
} else {
Throw new \Exception(
sprintf(
self::systemTranslate('Settings need a key (%s) and a value (%s)'),
$key,
$value
)
);
}
}
/**
* Flush settings to filesystem.
*
* @internal
* @static
* @throws \Exception
* @return bool
*/
private static function _flushSettings()
{
return self::_savePhpConfiguration();
}
/**
* This method will validate configuration based on structure.
*
* @internal
* @static
* @throws \Exception
* @return bool
*/
private static function _validate()
{
if (self::_validateStructure()) {
if (self::_validateConfiguration()) {
date_default_timezone_set(
self::getSetting('site,default time-zone'));
ini_set('default_socket_timeout',
self::getSetting('application,socket timeout'));
return true;
}
}
return false;
}
/**
* This method validates structure syntax.
*
* @internal
* @static
* @return bool
*/
private static function _validateStructure()
{
if (isset(self::$_structure)
&& is_array(self::$_structure)
&& count(self::$_structure) > 0
) {
self::$_structureKeys = array(
self::STRUCTURE_TYPE_ARRAY => true,
self::STRUCTURE_TYPE_ARRAY_ASSOCIATIVE => true,
self::STRUCTURE_TYPE_BOOLEAN => true,
self::STRUCTURE_TYPE_INTEGER => true,
self::STRUCTURE_TYPE_INTEGER_UNSIGNED => true,
self::STRUCTURE_TYPE_STRING => true,
);
return self::_validateStructureRec(self::$_structure);
}
return false;
}
/**
* This method validates structure of node recursive.
*
* @internal
* @static
* @param array $node
* @throws \Exception
* @return bool
*/
private static function _validateStructureRec(& $node)
{
if (isset($node)
&& is_array($node)
&& count($node) > 0
) {
$status = true;
foreach ($node as $key => $value) {
if (is_array($value)) {
if (!isset($value[self::STRUCTURE_KEY_TYPE])
&& !isset($value[self::STRUCTURE_KEY_REQUIRED])
&& !isset($value[self::STRUCTURE_KEY_DEFAULT])
) {
$status = $status
&& self::_validateStructureRec($value);
} else {
$defStatus = true;
if (!isset($value[self::STRUCTURE_KEY_TYPE])
|| is_array($value[self::STRUCTURE_KEY_TYPE])
|| !isset(self::$_structureKeys[$value[self::STRUCTURE_KEY_TYPE]])
) {
Throw new \Exception(
sprintf(
self::systemTranslate('Configuration value for "%s.%s" has invalid value "%s". Valid values are "%s" in structure node "%s".'),
$key,
self::STRUCTURE_KEY_TYPE,
(isset($value[self::STRUCTURE_KEY_TYPE]) ? $value[self::STRUCTURE_KEY_TYPE] : 'null'),
implode(',', array_keys(self::$_structureKeys)),
print_r($node, true)
));
}
if (!isset($value[self::STRUCTURE_KEY_REQUIRED])
|| ($value[self::STRUCTURE_KEY_REQUIRED] !== true
&& $value[self::STRUCTURE_KEY_REQUIRED] !== false)
) {
Throw new \Exception(
sprintf(
self::systemTranslate(
'Configuration value for "%s" has invalid value "%s" in structure node: "%s"'),
$key . '.' . self::STRUCTURE_KEY_REQUIRED,
$value[self::STRUCTURE_KEY_REQUIRED],
print_r($node, true) . '"'
)
);
}
$status = ($status && $defStatus);
}
}
}
return $status;
}
return false;
}
/**
* This method validates configuration according to structure.
*
* @internal
* @static
* @return bool
*/
private static function _validateConfiguration()
{
self::$_settings = array();
if (isset(self::$_configuration)
&& is_array(self::$_configuration)
&& isset(self::$_structure)
&& is_array(self::$_structure)
&& count(self::$_structure) > 0
) {
return self::_validateConfigurationRec(
self::$_structure,
self::$_configuration,
self::$_settings);
}
return false;
}