USE `vn`;
DROP function IF EXISTS `messageSendWithUser`;

DELIMITER $$
USE `vn`$$
CREATE DEFINER=`root`@`%` FUNCTION `messageSendWithUser`(vSenderFK INT, vRecipient VARCHAR(255) CHARSET utf8, vMessage TEXT CHARSET utf8) RETURNS int(11)
BEGIN

	DECLARE vCount INT;
	DECLARE vUuid VARCHAR(255);
	DECLARE vSendDate DATETIME DEFAULT NOW();
	DECLARE vSender VARCHAR(255) CHARSET utf8;

	SELECT `name` INTO vSender 
		FROM account.user WHERE id = vSenderFK;
        
	SET vRecipient = LOWER(vRecipient);

	DROP TEMPORARY TABLE IF EXISTS tRecipients;
	CREATE TEMPORARY TABLE tRecipients
		SELECT u.name finalRecipient
			FROM account.mailAlias a
				JOIN account.mailAliasAccount aa ON aa.mailAlias = a.id
				JOIN account.user u ON u.id = aa.account
			WHERE a.alias = vRecipient COLLATE utf8_unicode_ci
				AND u.name != vSender
				AND u.active
		UNION
		SELECT u.name FROM account.user u
			WHERE u.name = vRecipient
				AND u.active;

	SELECT COUNT(*) INTO vCount FROM tRecipients;

	IF vCount = 0 THEN
		RETURN vCount;
	END IF;    

	SET vUuid = UUID();

	INSERT INTO message
		SET uuid = vUuid,
			sender = vSender,
			recipient = vRecipient,
			message = vMessage,
			sendDate = vSendDate;

	INSERT INTO messageInbox (uuid, sender, recipient, finalRecipient, message, sendDate) 
		SELECT vUuid, vSender, vRecipient, finalRecipient, vMessage, vSendDate
			FROM tRecipients;

	DROP TEMPORARY TABLE tRecipients;
	RETURN vCount;
END$$

DELIMITER ;