Filter non compatible plugins

app/Core/Plugin/Directory.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace Kanboard\Core\Plugin;
+
+use Kanboard\Core\Base as BaseCore;
+
+/**
+ * Class Directory
+ *
+ * @package Kanboard\Core\Plugin
+ * @author  Frederic Guillot
+ */
+class Directory extends BaseCore
+{
+    /**
+     * Get all plugins available
+     *
+     * @access public
+     * @param  string $url
+     * @return array
+     */
+    public function getAvailablePlugins($url = PLUGIN_API_URL)
+    {
+        $plugins = $this->httpClient->getJson($url);
+        $plugins = array_filter($plugins, array($this, 'isCompatible'));
+        $plugins = array_filter($plugins, array($this, 'isInstallable'));
+        return $plugins;
+    }
+
+    /**
+     * Filter plugins
+     *
+     * @param array  $plugin
+     * @param string $appVersion
+     * @return bool
+     */
+    public function isCompatible(array $plugin, $appVersion = APP_VERSION)
+    {
+        if (strpos($appVersion, 'master') !== false) {
+            return true;
+        }
+
+        return $plugin['compatible_version'] === $appVersion;
+    }
+
+    /**
+     * Filter plugins
+     *
+     * @param array  $plugin
+     * @return bool
+     */
+    public function isInstallable(array $plugin)
+    {
+        return $plugin['remote_install'];
+    }
+}