1 files changed, 128 insertions, 0 deletions
diff --git a/library/Icinga/Less/LightMode.php b/library/Icinga/Less/LightMode.php
new file mode 100644
index 0000000..b4b72a0
--- /dev/null
+++ b/library/Icinga/Less/LightMode.php
@@ -0,0 +1,128 @@
+<?php
+/* Icinga Web 2 | (c) 2022 Icinga GmbH | GPLv2+ */
+
+namespace Icinga\Less;
+
+use ArrayIterator;
+use InvalidArgumentException;
+use IteratorAggregate;
+use Less_Environment;
+use Traversable;
+
+/**
+ * Registry for light modes and the environments in which they are defined
+ */
+class LightMode implements IteratorAggregate
+{
+    /** @var array Mode environments as mode-environment pairs */
+    protected $envs = [];
+
+    /** @var array Assoc list of modes */
+    protected $modes = [];
+
+    /** @var array Mode selectors as mode-selector pairs */
+    protected $selectors = [];
+
+    /**
+     * @param string $mode
+     *
+     * @return $this
+     *
+     * @throws InvalidArgumentException If the mode already exists
+     */
+    public function add($mode)
+    {
+        if (array_key_exists($mode, $this->modes)) {
+            throw new InvalidArgumentException("$mode already exists");
+        }
+
+        $this->modes[$mode] = true;
+
+        return $this;
+    }
+
+    /**
+     * @param string $mode
+     *
+     * @return Less_Environment
+     *
+     * @throws InvalidArgumentException If there is no environment for the given mode
+     */
+    public function getEnv($mode)
+    {
+        if (! isset($this->envs[$mode])) {
+            throw new InvalidArgumentException("$mode does not exist");
+        }
+
+        return $this->envs[$mode];
+    }
+
+    /**
+     * @param string           $mode
+     * @param Less_Environment $env
+     *
+     * @return $this
+     *
+     * @throws InvalidArgumentException If an environment for given the mode already exists
+     */
+    public function setEnv($mode, Less_Environment $env)
+    {
+        if (array_key_exists($mode, $this->envs)) {
+            throw new InvalidArgumentException("$mode already exists");
+        }
+
+        $this->envs[$mode] = $env;
+
+        return $this;
+    }
+
+    /**
+     * @param string $mode
+     *
+     * @return bool
+     */
+    public function hasSelector($mode)
+    {
+        return isset($this->selectors[$mode]);
+    }
+
+    /**
+     * @param string $mode
+     *
+     * @return string
+     *
+     * @throws InvalidArgumentException If there is no selector for the given mode
+     */
+    public function getSelector($mode)
+    {
+        if (! isset($this->selectors[$mode])) {
+            throw new InvalidArgumentException("$mode does not exist");
+        }
+
+        return $this->selectors[$mode];
+    }
+
+    /**
+     * @param string $mode
+     * @param string $selector
+     *
+     * @return $this
+     *
+     * @throws InvalidArgumentException If a selector for given the mode already exists
+     */
+    public function setSelector($mode, $selector)
+    {
+        if (array_key_exists($mode, $this->selectors)) {
+            throw new InvalidArgumentException("$mode already exists");
+        }
+
+        $this->selectors[$mode] = $selector;
+
+        return $this;
+    }
+
+    public function getIterator(): Traversable
+    {
+        return new ArrayIterator(array_keys($this->modes));
+    }
+}