104 lines
2.1 KiB
PHP
104 lines
2.1 KiB
PHP
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<?php
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namespace alveolata\conf;
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// require_once(DIR_ALVEOLATA . '/definitions.php');
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require_once(DIR_ALVEOLATA . '/file/functions.php');
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require_once(DIR_ALVEOLATA . '/json/functions.php');
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require_once(DIR_ALVEOLATA . '/cache/functions.php');
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/**
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* @var \alveolata\cache\interface_cache
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* @author Christian Fraß <frass@greenscale.de>
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*/
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class _state
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{
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public static $path = 'conf.json';
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public static $cache_kind = 'memory';
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public static $cache_parameters = [];
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public static $cache_instance = null;
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}
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/**
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* @author Christian Fraß <frass@greenscale.de>
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*/
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function set_cache(
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string $kind,
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array $parameters = []
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) : void
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{
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_state::$cache_kind = $kind;
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_state::$cache_parameters = $parameters;
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}
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/**
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* @author Christian Fraß <frass@greenscale.de>
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*/
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function set_path(
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string $path
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) : void
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{
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_state::$path = $path;
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}
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/**
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* @param string $path
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* @param any [$fallback] value to return in case no conf entry was found for the given path
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* @param boolean [$throw_exception] if true, do not return the fallback in case of a missing entry, but throw an exception
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* @return mixed
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* @throw \Exception
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* @author Christian Fraß <frass@greenscale.de>
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*/
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function get(
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string $path,
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$fallback = null,
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$throw_exception = false
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)
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{
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// prepare cache
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if (_state::$cache_instance === null) {
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_state::$cache_instance = \alveolata\cache\make(_state::$cache_kind, _state::$cache_parameters);
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}
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// get raw data
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$data = \alveolata\cache\get(
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_state::$cache_instance,
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'data',
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function () {
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$content = \alveolata\file\read(_state::$path);
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$data = \alveolata\json\decode($content);
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return $data;
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}
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);
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// get specific piece of information
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$steps = (($path === '') ? [] : explode('.', $path));
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$value = $data;
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foreach ($steps as $step) {
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if (! array_key_exists($step, $value)) {
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$report = \alveolata\report\make(
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'conf entry not set',
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[
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'path' => $path,
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'fallback' => $fallback,
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]
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);
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if ($throw_exception) {
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throw (\alveolata\report_as_exception($report));
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}
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else {
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\alveolata\log\warning_($report);
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return $fallback;
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}
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}
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else {
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$value = $value[$step];
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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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