First draft of a new DB schema

docs/database/schema.mysql

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+CREATE TABLE `config` (
+  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
+  `key` VARCHAR(40) NOT NULL,
+  `value` VARCHAR(40) DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE (`key`)
+) ENGINE INNODB DEFAULT CHARSET=utf8;
+INSERT INTO `config` (`key`,`value`)
+  VALUES ('schema_version', '1');
+
+CREATE TABLE `rooms` (
+  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
+  `name` VARCHAR(120) NOT NULL,
+  `owner` VARCHAR(60) DEFAULT NULL,
+  `create_date` DATETIME DEFAULT NULL,
+  `last_activity` DATETIME DEFAULT NULL,
+  `locked` TINYINT UNSIGNED DEFAULT '0',
+  `ask_for_name` TINYINT UNSIGNED DEFAULT '0',
+  `join_password` VARCHAR(160) DEFAULT NULL,
+  `owner_password` VARCHAR(160) DEFAULT NULL,
+  `etherpad_group` VARCHAR(40) DEFAULT NULL,
+  `token` VARCHAR(160) NOT NULL,
+  `realm` VARCHAR(160) DEFAULT NULL,
+  `persistent` TINYINT UNSIGNED DEFAULT '0',
+  PRIMARY KEY (`id`),
+  UNIQUE (`name`),
+  INDEX (`last_activity`)
+) ENGINE INNODB DEFAULT CHARSET=utf8;
+
+CREATE TABLE `participants` (
+  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
+  `room_id` INT UNSIGNED NOT NULL,
+  `participant` VARCHAR(60) NOT NULL,
+  `peer_id` VARCHAR(40) DEFAULT NULL,
+  `role` VARCHAR(30) DEFAULT 'participant',
+  `last_activity` DATETIME DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE (`room_id`, `participant`),
+  UNIQUE (`room_id`, `peer_id`),
+  UNIQUE (`participant`,`peer_id`),
+  FOREIGN KEY (`room_id`) REFERENCES `rooms` (`id`)
+    ON UPDATE CASCADE
+    ON DELETE CASCADE
+) ENGINE INNODB DEFAULT CHARSET=utf8;
+
+CREATE TABLE `notifications` (
+  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
+  `room_id` INT UNSIGNED NOT NULL,
+  `email` VARCHAR(254),
+  PRIMARY KEY (`id`),
+  UNIQUE (`room_id`, `email`),
+  FOREIGN KEY (`room_id`) REFERENCES `rooms` (`id`)
+    ON UPDATE CASCADE
+    ON DELETE CASCADE
+) ENGINE INNODB DEFAULT CHARSET=utf8;
+
+CREATE TABLE `invitations` (
+  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
+  `room_id` INT UNSIGNED NOT NULL,
+  `email` VARCHAR(254) NOT NULL,
+  `token` VARCHAR(160) NOT NULL,
+  `from` VARCHAR(60) NOT NULL,
+  `response` VARCHAR(20) DEFAULT NULL,
+  `message` TEXT DEFAULT NULL,
+  `processed` TINYINT DEFAULT '0',
+  `date` DATETIME DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE (`token`),
+  FOREIGN KEY (`room_id`) REFERENCES `rooms` (`id`)
+    ON UPDATE CASCADE
+    ON DELETE CASCADE
+) ENGINE INNODB DEFAULT CHARSET=utf8;
+
+#DROP TABLE IF EXISTS `turnusers_lt`;
+#CREATE TABLE `turnusers_lt` (
+#  name VARCHAR(512) PRIMARY KEY,
+#  hmackey char(32)
+#);
+CREATE VIEW `turnusers_lt` AS 
+  SELECT `name` AS `name`,
+  MD5(CONCAT(CONCAT(CONCAT(CONCAT(`name`,':'),`realm`),':'),`token`)) AS `hmackey`
+  FROM `rooms`;
+
+CREATE TABLE `turnusers_st` (
+  `name` VARCHAR(512) PRIMARY KEY,
+  `password` VARCHAR(512)
+) ENGINE INNODB DEFAULT CHARSET=latin1;
+
+CREATE TABLE `turn_secret` (
+  `value` VARCHAR(512)
+) ENGINE INNODB DEFAULT CHARSET=latin1;
+
+CREATE TABLE `allowed_peer_ip` (
+  `ip_range` VARCHAR(256)
+) ENGINE INNODB DEFAULT CHARSET=latin1;
+
+CREATE TABLE `denied_peer_ip` (
+  `ip_range` VARCHAR(256)
+) ENGINE INNODB DEFAULT CHARSET=latin1;
+