Add upstream plugins

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

wp-content/plugins/all-in-one-event-calendar/lib/date/converter.php

@@ -0,0 +1,62 @@
+<?php
+
+/**
+ * Library function for massive time conversion operations.
+ *
+ * @author       Time.ly Network, Inc.
+ * @since        2.0
+ * @package      Ai1EC
+ * @subpackage   Ai1EC.Date
+ */
+class Ai1ec_Date_Converter {
+
+    /**
+     * @var Ai1ec_Registry_Object Instance of objects registry.
+     */
+    protected $_registry = null;
+
+    /**
+     * Get reference of object registry.
+     *
+     * @param Ai1ec_Registry_Object $registry Injected objects registry.
+     *
+     * @return void
+     */
+    public function __construct( Ai1ec_Registry_Object $registry ) {
+        $this->_registry = $registry;
+    }
+
+    /**
+     * Change timezone of times provided.
+     *
+     * @param array  $input     List of time entries to convert.
+     * @param string $source_tz Timezone to convert from.
+     * @param string $target_tz Timezone to convert to.
+     * @param string $format    Format of target time entries.
+     *
+     * @return array List of converted times.
+     */
+    public function change_timezone(
+        array $input,
+        $source_tz,
+        $target_tz = 'UTC',
+        $format    = 'U'
+    ) {
+        $output = array();
+        foreach ( $input as $time ) {
+            try {
+                $time_object = $this->_registry->get(
+                    'date.time',
+                    $input,
+                    $source_tz
+                );
+                $output[] = $time_object->format( $format, $target_tz );
+                unset( $time_object );
+            } catch ( Ai1ec_Date_Exception $exception ) {
+                // ignore
+            }
+        }
+        return $output;
+    }
+
+}