259 lines
8.5 KiB
PHP
259 lines
8.5 KiB
PHP
<?php
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Namespace EesyPHP;
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Class Config {
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/**
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* Configuration file path
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* @var string|null
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*/
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private static $filepath = null;
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/**
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* Loaded configuration data
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* @var array|null
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*/
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private static $config = null;
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/**
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* Extra registered variables usable in configuration file
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* @var array
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*/
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private static $extra_variables = array();
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/**
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* Load configuration file
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* @param string $filepath The configuration file path
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* @param bool $extra Load as an extra configuration file (default: false)
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* @return bool
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*/
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public static function load($filepath, $extra=false) {
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if (!file_exists($filepath)) {
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Log :: error("Configuration file not found ($filepath)");
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return false;
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}
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$config = yaml_parse_file($filepath);
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if (!is_array($config) || empty($config)) {
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Log :: error("Fail to load %sconfiguration file (%s)", $extra?'extra ':'', $filepath);
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return false;
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}
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if (!$extra || !is_array(self :: $config))
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self :: $config = $config;
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else
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self :: $config = array_replace_recursive(self :: $config, $config);
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if (!$extra)
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self :: $filepath = $filepath;
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return true;
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}
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/**
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* Check if configuration is loaded
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* @return bool
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*/
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public static function loaded() {
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return is_array(self :: $config);
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}
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/**
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* Save configuration
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* @param string|null $filepath The configuration file path
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* @param bool $overwrite Overwrite existing file (optional, default: true)
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* @return bool
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*/
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public static function save($filepath=null, $overwrite=true) {
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if (!self :: loaded()) {
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Log :: error("Configuration not loaded, can't save it.");
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return false;
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}
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if (!$filepath) $filepath = self :: $filepath;
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if (!$filepath) {
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Log :: error("No configuration file set or pass as parameter");
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return false;
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}
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if (file_exists($filepath)) {
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if (!$overwrite) {
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Log :: error("Configuration file already exist (%s)", $filepath);
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return false;
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}
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if (!is_writable($filepath)) {
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Log :: error(
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"Configuration file already exist and is not writable (%s)",
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$filepath);
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return false;
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}
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}
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if (!yaml_emit_file($filepath, self :: $config)) {
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Log :: error("Fail to save configuration in '%s'", $filepath);
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return false;
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}
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Log :: info("Configuration saved in '%s'", $filepath);
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return true;
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}
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/**
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* Register extra variable usable in configuration file
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* @param string $key The variable key
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* @param mixed $value The variable value
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*/
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public static function register_extra_variable($key, $value) {
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self :: $extra_variables[$key] = $value;
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}
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/**
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* Check if a specific configuration variable is set
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*
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* @param string $key The configuration variable key
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* @param array|null $config Optional configuration to use instead of current loaded configuration
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* @return bool
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**/
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public static function isset($key, &$config=null) {
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if (array_key_exists($key, self :: $extra_variables))
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return true;
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if (!is_array($config) && !self :: loaded())
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Log :: fatal('Configuration not loaded (on checking if %s is set)', $key);
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$exploded_key = explode('.', $key);
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if (!is_array($exploded_key)) return false;
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$value = is_array($config)?$config:self :: $config;
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foreach ($exploded_key as $k) {
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if (!is_array($value) || !isset($value[$k]))
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return false;
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$value = $value[$k];
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}
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return true;
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}
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/**
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* Get a specific configuration variable value
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*
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* @param string $key The configuration variable key
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* @param mixed $default The default value to return if configuration variable
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* is not set (Default : null)
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* @param string $cast The type of expected value. The configuration variable
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* value will be cast as this type. Could be : bool, int,
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* float or string. (Optional, default : raw value)
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* @param bool $split If true, $cast=='array' and $value is a string, split
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* the value by comma (optional, default: false)
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* @param array|null $config Optional configuration to use instead of current loaded configuration
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* @param callable|null $get Optional callable to get another value that will be used to replace
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* variables references found in retrieved value.
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* @return mixed The configuration variable value
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**/
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public static function get($key, $default=null, $cast=null, $split=false, &$config=null, $get=null) {
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if (array_key_exists($key, self :: $extra_variables)) {
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$value = self :: $extra_variables[$key];
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}
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else if (!is_array($config) && !self :: loaded()) {
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Log :: fatal(
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"Configuration not loaded (on getting %s):\n%s",
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$key, Log :: get_debug_backtrace_context()
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);
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}
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else {
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$exploded_key = explode('.', $key);
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if (!is_array($exploded_key)) return self :: replace_variables($default, $get?$get:$config);
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$value = is_array($config)?$config:self :: $config;
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foreach ($exploded_key as $k) {
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if (!is_array($value) || !isset($value[$k]))
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return self :: replace_variables($default, $get?$get:$config);
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$value = $value[$k];
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}
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}
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return self :: replace_variables(cast($value, $cast, $split), $get?$get:$config);
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}
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/**
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* Replace variable in specified value
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* @param mixed $value
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* @param array|callable|null $config Optional configuration to use to retrieve variable reference
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* value instead of current loaded configuration. Could be an
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* array of configuration data or a callable that could be used
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* as Config::get() to retrieve the desired variable reference.
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* @return mixed
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*/
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public static function replace_variables($value, $config=null) {
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if (is_array($value)) {
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foreach(array_keys($value) as $key) {
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if (is_string($value[$key]) || is_array($value[$key]))
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$value[$key] = self :: replace_variables($value[$key], $config);
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}
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}
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else if (is_string($value)) {
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$config = is_null($config)?self :: $config:$config;
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$iteration = 0;
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while (preg_match('/\$\{([^\}]+)\}/', $value, $m)) {
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if ($iteration > 20)
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Log::fatal('Config::replace_variables(%s): max iteration reached');
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if (is_callable($config))
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$replace_by = call_user_func($config, $m[1], '', 'string', false);
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else
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$replace_by = self :: get($m[1], '', 'string', false, $config);
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$value = str_replace($m[0], $replace_by, $value);
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$iteration++;
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}
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}
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return $value;
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}
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/**
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* Get list of keys of a specific configuration variable
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*
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* @param string $key The configuration variable key
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*
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* @return array An array of the keys of a specific configuration variable
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**/
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public static function keys($key) {
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$value = self :: get($key);
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return (is_array($value)?array_keys($value):array());
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}
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/**
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* Set a configuration variable
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*
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* @param string $key The configuration variable key
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* @param mixed $value The configuration variable value
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* @param array|null &$config Optional configuration to use instead of current loaded configuration
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*
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* @return boolean
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**/
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public static function set($key, $value, &$config=null) {
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$exploded_key = explode('.', $key);
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if (!is_array($exploded_key)) return false;
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if (is_array($config)) {
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$parent = &$config;
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}
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else {
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if (!is_array(self :: $config))
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self :: $config = array();
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$parent = &self :: $config;
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}
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for ($i=0; $i < count($exploded_key) - 1; $i++) {
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$k = $exploded_key[$i];
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if (!array_key_exists($k, $parent))
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$parent[$k] = array();
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$parent = &$parent[$k];
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}
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$parent[array_pop($exploded_key)] = $value;
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return true;
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}
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/**
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* Helper to set PHP INI option and log error
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* @param string $option
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* @param string|int|float|bool|null $value
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* @return void
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*/
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public static function ini_set($option, $value) {
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Log :: trace('Set PHP INI option "%s" to "%s"', $option, $value);
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if (ini_set($option, $value) === false)
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Log::warning('Fail to set PHP INI option "%s" to "%s"', $option, $value);
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Log :: trace(
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'PHP INI option "%s" after setting it to "%s": "%s"',
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$option, $value, vardump(ini_get($option)));
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}
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}
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# vim: tabstop=4 shiftwidth=4 softtabstop=4 expandtab
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