DROP TABLE IF EXISTS `users`;
CREATE TABLE `users`
(
	`user_id`            INT(11)         NOT NULL   AUTO_INCREMENT,
	`user_key`           VARCHAR(64)     NOT NULL,
	`fcm_token`          VARCHAR(256)        NULL   DEFAULT NULL,
	`messages_sent`      INT(11)         NOT NULL   DEFAULT '0',
	`timestamp_created`  DATETIME        NOT NULL   DEFAULT CURRENT_TIMESTAMP,
	`timestamp_accessed` DATETIME            NULL   DEFAULT NULL,

	`quota_today`        INT(11)         NOT NULL   DEFAULT '0',
	`quota_day`          DATE                NULL   DEFAULT NULL,

	`is_pro`             BIT             NOT NULL   DEFAULT 0,
	`pro_token`          VARCHAR(256)        NULL   DEFAULT NULL,

	PRIMARY KEY (`user_id`)
);

DROP TABLE IF EXISTS `messages`;
CREATE TABLE `messages`
(
	`scn_message_id`     INT(11)         NOT NULL   AUTO_INCREMENT,
	`sender_user_id`     INT(11)         NOT NULL,

	`timestamp_real`     DATETIME        NOT NULL   DEFAULT CURRENT_TIMESTAMP,
	`ack`                BIT             NOT NULL   DEFAULT 0,

	`title`              VARCHAR(256)    NOT NULL,
	`content`            VARCHAR(12288)      NULL,
	`priority`           INT(11)         NOT NULL,
	`sendtime`           BIGINT UNSIGNED NOT NULL,

	`fcm_message_id`     VARCHAR(256)        NULL,
	`usr_message_id`     VARCHAR(256)        NULL,

	PRIMARY KEY (`scn_message_id`)
);