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|
<?php
namespace App\Config;
/**
* A class to load a config into an array
* Throws an exception if it fails to laod
*
* @author Phil Burton <phil@pgburton.com>
*/
class Loader
{
/**
* A loaded config array
*
* @var mixed[]
*/
protected $config;
/**
* Try and load a config
*
* @author Phil Burton <phil@pgburton.com>
*/
public function __construct()
{
foreach ($this->getConfigPaths() as $path) {
if ($config = $this->loadConfig($path)) {
$this->validate();
$this->clean();
return;
}
}
// No config found
throw new \Exception('Could not find config file.');
}
/**
* Try and load a config file
* If we can't return false
*
* @author Phil Burton <phil@pgburton.com>
* @return mixed[]|false
*/
public function loadConfig(string $path)
{
$filename = $path . '/' . $this->getConfigFilename();
if (!$this->config) {
if (!file_exists($filename)) {
return false;
}
if (!is_readable($filename)) {
return false;
}
if (!$config = include($filename)) {
return false;
}
$this->config = $config;
}
return $this->config;
}
/**
* Return the nsam of the config file to load
*
* @author Phil Burton <phil@pgburton.com>
* @return string;
*/
public function getConfigFilename()
{
return 'dipper.php';
}
/**
* Make sure the config is up to scratch
*
* @author Phil Burton <phil@pgburton.com>
*/
public function validate()
{
$config = $this->getConfig();
foreach ($this->getRequired() as $required) {
if (!isset($config[$required])) {
throw new \Exception("Could not find " . $required . " in config file.");
}
}
}
/**
* Clean up the config ready for use
*
* @author Phil Burton <phil@pgburton.com>
*/
public function clean()
{
$config = $this->getConfig();
foreach ($config as &$item) {
// Remove trailing slashes
$item = rtrim($item, "/");
}
$this->config = $config;
}
/**
* Return the array of config paths
*
* @author Phil Burton <phil@pgburton.com>
* @return string[]
*/
public function getConfigPaths()
{
return [
realpath(dirname(__FILE__) . "/../../"), // Root of dipper
realpath(dirname(__FILE__) . "/../../config") // Config directory in dipper
];
}
/**
* Return the loaded config
*
* @author Phil Burton <phil@pgburton.com>
* @return mixed[]
*/
public function getConfig()
{
return $this->config;
}
/**
* Return the required config keys
*
* @author Phil Burton <phil@pgburton.com>
* @return string[]
*/
public function getRequired()
{
return [
"SITES_ROOT",
"CONFIG_ROOT"
];
}
}
|
