1 files changed, 91 insertions, 0 deletions
diff --git a/library/Icinga/Application/Libraries.php b/library/Icinga/Application/Libraries.php
new file mode 100644
index 0000000..8e4a79d
--- /dev/null
+++ b/library/Icinga/Application/Libraries.php
@@ -0,0 +1,91 @@
+<?php
+/* Icinga Web 2 | (c) 2020 Icinga GmbH | GPLv2+ */
+
+namespace Icinga\Application;
+
+use ArrayIterator;
+use IteratorAggregate;
+use Icinga\Application\Libraries\Library;
+use Traversable;
+
+class Libraries implements IteratorAggregate
+{
+    /** @var Library[] */
+    protected $libraries = [];
+
+    /**
+     * Iterate over registered libraries
+     *
+     * @return ArrayIterator
+     */
+    public function getIterator(): Traversable
+    {
+        return new ArrayIterator($this->libraries);
+    }
+
+    /**
+     * Register a library from the given path
+     *
+     * @param string $path
+     *
+     * @return Library The registered library
+     */
+    public function registerPath($path)
+    {
+        $library = new Library($path);
+        $this->libraries[] = $library;
+
+        return $library;
+    }
+
+    /**
+     * Check if a library with the given name has been registered
+     *
+     * Passing a version constraint also verifies that the library's version matches.
+     *
+     * @param string $name
+     * @param string $version
+     *
+     * @return bool
+     */
+    public function has($name, $version = null)
+    {
+        $library = $this->get($name);
+        if ($library === null) {
+            return false;
+        } elseif ($version === null || $version === true) {
+            return true;
+        }
+
+        $operator = '=';
+        if (preg_match('/^([<>=]{1,2})\s*v?((?:[\d.]+)(?:\D+)?)$/', $version, $match)) {
+            $operator = $match[1];
+            $version = $match[2];
+        }
+
+        return version_compare($library->getVersion(), $version, $operator);
+    }
+
+    /**
+     * Get a library by name
+     *
+     * @param string $name
+     *
+     * @return Library|null
+     */
+    public function get($name)
+    {
+        $candidate = null;
+        foreach ($this->libraries as $library) {
+            $libraryName = $library->getName();
+            if ($libraryName === $name) {
+                return $library;
+            } elseif (strpos($libraryName, '/') !== false && explode('/', $libraryName)[1] === $name) {
+                // Also return libs which only partially match
+                $candidate = $library;
+            }
+        }
+
+        return $candidate;
+    }
+}