Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/lib/exception/ai1ec.php

@@ -0,0 +1,52 @@
+<?php
+
+/**
+ * Abstract base class for all our excpetion.
+ *
+ * @author     Time.ly Network Inc.
+ * @since      2.0
+ *
+ * @package    AI1EC
+ * @subpackage AI1EC.Exception
+ */
+class Ai1ec_Exception extends Exception {
+
+    /**
+     * A message to be displayed for admin
+     *
+     * Specific Exceptions should override this.
+     *
+     * @return string Message to be displayed for admin
+     */
+    public function get_html_message() {
+        return $this->getMessage();
+    }
+
+    /**
+     * Return the èath of the plugin to disable it.
+     * If empty it disables core.
+     *
+     * @return string
+     */
+    public function plugin_to_disable() {
+        return '';
+    }
+
+    /**
+     * Returns destination URL if exception handler redirects.
+     *
+     * @return string Result.
+     */
+    public function get_redirect_url() {
+        return ai1ec_get_admin_url();
+    }
+
+    /**
+     * Defined whether exception handler should attach backtrace or not.
+     *
+     * @return bool Value.
+     */
+    public function display_backtrace(){
+        return true;
+    }
+}