1 files changed, 150 insertions, 0 deletions
diff --git a/src/Config/Loader.php b/src/Config/Loader.php
new file mode 100644
index 0000000..97df62e
--- /dev/null
+++ b/src/Config/Loader.php
@@ -0,0 +1,150 @@
+<?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"
+        ];
+    }
+}