From 88880f14dff2731838953b937692f87620750f69 Mon Sep 17 00:00:00 2001
From: Daniel Weipert <code@drogueronin.de>
Date: Thu, 27 Jan 2022 22:57:25 +0100
Subject: Add Kernel with config

---
 .gitignore         |  2 ++
 config.example.php |  7 +++++++
 public/index.php   |  6 +++---
 src/Kernel.php     | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 63 insertions(+), 3 deletions(-)
 create mode 100644 config.example.php
 create mode 100644 src/Kernel.php

diff --git a/.gitignore b/.gitignore
index 7db1f9d..8a6b055 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,8 @@
 /vendor/
 db.sqlite
+config.php
 
+/plugins
 /public/artworks
 
 # Jetbrains
diff --git a/config.example.php b/config.example.php
new file mode 100644
index 0000000..11d878e
--- /dev/null
+++ b/config.example.php
@@ -0,0 +1,7 @@
+<?php
+
+return [
+  'environment' => 'production',
+  'plugins_directory' => __DIR__ . '/plugins',
+];
+
diff --git a/public/index.php b/public/index.php
index 022af48..85aad22 100644
--- a/public/index.php
+++ b/public/index.php
@@ -1,8 +1,8 @@
 <?php
 
+use Elements\Kernel;
+
 require_once dirname(__DIR__) . '/vendor/autoload.php';
 
-\Elements\Template::init();
-\Elements\DB::init();
-new \Elements\Router();
+Kernel::init();
 
diff --git a/src/Kernel.php b/src/Kernel.php
new file mode 100644
index 0000000..29785a8
--- /dev/null
+++ b/src/Kernel.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace Elements;
+
+class Kernel
+{
+  private static array $config = [];
+
+  /**
+   * Kernel initialization.
+   */
+  public static function init()
+  {
+    $configFile = self::findAppConfigFile(dirname(__DIR__));
+    $config = include $configFile;
+    foreach ($config as $key => $value) {
+      self::$config[$key] = $value;
+    }
+
+    Template::init();
+    DB::init();
+    new Router();
+  }
+
+  /**
+   * Find app config file in parent directories
+   */
+  private static function findAppConfigFile(string $path): string
+  {
+    $currentDirectory = $path;
+    while ($currentDirectory !== '/') {
+      $configFile = $currentDirectory . '/config.php';
+      if (file_exists($configFile)) {
+	return $configFile;
+      }
+
+      $currentDirectory = dirname($currentDirectory);
+    }
+
+    die('config.php missing');
+  }
+
+  /**
+   * Get config value
+   */
+  public static function config($key): mixed
+  {
+    return self::$config[$key];
+  }
+}
+
-- 
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