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[yaffs-website] / vendor / consolidation / config / src / Util / EnvConfig.php

diff --git a/vendor/consolidation/config/src/Util/EnvConfig.php b/vendor/consolidation/config/src/Util/EnvConfig.php
new file mode 100644 (file)
index 0000000..05f8d2a
--- /dev/null
+++ b/vendor/consolidation/config/src/Util/EnvConfig.php
@@ -0,0 +1,96 @@
+<?php
+namespace Consolidation\Config\Util;
+
+use Consolidation\Config\Config;
+use Consolidation\Config\ConfigInterface;
+
+/**
+ * Provide a configuration object that fetches values from environment
+ * variables.
+ */
+class EnvConfig implements ConfigInterface
+{
+    /** @var string */
+    protected $prefix;
+
+    /**
+     * EnvConfig constructor
+     *
+     * @param $prefix The string to appear before every environment
+     *   variable key. For example, if the prefix is 'MYAPP_', then
+     *   the key 'foo.bar' will be fetched from the environment variable
+     *   MYAPP_FOO_BAR.
+     */
+    public function __construct($prefix)
+    {
+        // Ensure that the prefix is always uppercase, and always
+        // ends with a '_', regardless of the form the caller provided.
+        $this->prefix = strtoupper(rtrim($prefix, '_')) . '_';
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function has($key)
+    {
+        return $this->get($key) !== null;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function get($key, $defaultFallback = null)
+    {
+        $envKey = $this->prefix . strtoupper(strtr($key, '.-', '__'));
+        $envKey = str_replace($this->prefix . $this->prefix, $this->prefix, $envKey);
+        return getenv($envKey) ?: $defaultFallback;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function set($key, $value)
+    {
+        throw new \Exception('Cannot call "set" on environmental configuration.');
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function import($data)
+    {
+        // no-op
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function export()
+    {
+        return [];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function hasDefault($key)
+    {
+        return false;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getDefault($key, $defaultFallback = null)
+    {
+        return $defaultFallback;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function setDefault($key, $value)
+    {
+        throw new \Exception('Cannot call "setDefault" on environmental configuration.');
+    }
+}