diff --git a/lib/invite.php b/lib/invite.php
new file mode 100644
index 00000000..f07d6214
--- /dev/null
+++ b/lib/invite.php
@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * ownCloud - Office App
+ *
+ * @author Victor Dubiniuk
+ * @copyright 2013 Victor Dubiniuk victor.dubiniuk@gmail.com
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ */
+
+namespace OCA\Office;
+
+class Invite {
+	const STATUS_SENT = 0;
+	const STATUS_DECLINED = 1;
+	const STATUS_ACCEPTED = 2;
+	
+	public static function add($esId, $userId){
+		$query = \OCP\DB::prepare('INSERT INTO `*PREFIX*office_invite`  (`es_id`, `uid`, `status`, `sent_on`) VALUES (?, ?, ?, ?) ');
+		$query->execute(array(
+			$esId,
+			$userId,
+			self::STATUS_SENT,
+			time()
+		));
+
+		return \OCP\DB::insertid(`*PREFIX*office_invite`);
+	}
+	
+	public static function accept($esId){
+		$query = \OCP\DB::prepare('UPDATE `*PREFIX*office_invite`  SET `status`=? WHERE `es_id`=? AND `uid`=?');
+		$query->execute(array(
+			self::STATUS_ACCEPTED,
+			$esId,
+			\OCP\User::getUser()
+		));
+	}
+
+	public static function decline($esId){
+		$query = \OCP\DB::prepare('UPDATE `*PREFIX*office_invite`  SET `status`=? WHERE `es_id`=? AND `uid`=?');
+		$query->execute(array(
+			self::STATUS_DECLINED,
+			$esId,
+			\OCP\User::getUser()
+		));
+	}
+
+	
+	public static function getAllInvites(){
+		$query = \OCP\DB::prepare('SELECT * FROM `*PREFIX*office_invite` WHERE `uid`= ?');
+		$result = $query->execute(array(\OCP\User::getUser()));
+		return $result->fetchAll();
+	}
+	
+	public static function getSenderStatusesAsArray(){
+		$l10n = \OCP\Util::getL10N('office');
+		
+		return array(
+			self::STATUS_SENT => $l10n->t('Sent'),
+			self::STATUS_DECLINED => $l10n->t('Declined'),
+			self::STATUS_ACCEPTED => $l10n->t('Accepted')
+		);
+	}
+	
+	public static function getRecipientStatusesAsArray(){
+		$l10n = \OCP\Util::getL10N('office');
+		
+		return array(
+			self::STATUS_SENT => $l10n->t('Incoming'),
+			self::STATUS_DECLINED => $l10n->t('Declined'),
+			self::STATUS_ACCEPTED => $l10n->t('Accepted')
+		);
+	}
+}
\ No newline at end of file