###单聊群聊功能
ALTER TABLE `user` add COLUMN `active_status` INT(11) DEFAULT "2" COMMENT '在线状态 1在线 2离线' AFTER `open_id` ;

DROP TABLE IF EXISTS `room`;
CREATE TABLE `room` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT COMMENT 'id',
  `name` varchar(16) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT '群名称',
  `avatar` varchar(256) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT '群头像',
  `type` int(11) NOT NULL COMMENT '房间类型 1群聊',
  `hot_flag` int(11) DEFAULT '0' COMMENT '是否全员展示 0否 1是',
  `active_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '群最后消息的更新时间（热点群不需要写扩散，更新这里就行）',
  `ext_json` json DEFAULT NULL COMMENT '额外信息（根据不同类型房间有不同存储的东西）',
  `create_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '创建时间',
  `update_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3) COMMENT '修改时间',
  PRIMARY KEY (`id`) USING BTREE,
  KEY `idx_create_time` (`create_time`) USING BTREE,
  KEY `idx_update_time` (`update_time`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='房间表';

CREATE TABLE `user_apply` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT COMMENT 'id',
  `uid` bigint(20) NOT NULL COMMENT '申请人uid',
  `type` int(11) NOT NULL COMMENT '申请类型 1加好友',
  `target_id` bigint(20) NOT NULL COMMENT '接收人uid',
  `msg` varchar(64) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT '申请信息',
  `status` int(11) NOT NULL COMMENT '申请状态 1待审批 2同意',
  `read_status` int(11) NOT NULL COMMENT '阅读状态 1未读 2已读',
  `create_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '创建时间',
  `update_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3) COMMENT '修改时间',
  PRIMARY KEY (`id`) USING BTREE,
  UNIQUE KEY `uniq_target_id_uid` (`target_id`,`uid`) USING BTREE,
  KEY `idx_target_id` (`target_id`) USING BTREE,
  KEY `idx_create_time` (`create_time`) USING BTREE,
  KEY `idx_update_time` (`update_time`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='用户申请表';

CREATE TABLE `user_friend` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT COMMENT 'id',
  `uid` bigint(20) NOT NULL COMMENT 'uid',
  `friend_uid` bigint(20) NOT NULL COMMENT '好友uid',
  `create_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '创建时间',
  `update_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3) COMMENT '修改时间',
  PRIMARY KEY (`id`) USING BTREE,
  UNIQUE KEY `uniq_uid_friend_uid` (`uid`,`friend_uid`) USING BTREE,
  KEY `idx_create_time` (`create_time`) USING BTREE,
  KEY `idx_update_time` (`update_time`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='用户联系人表';

CREATE TABLE `group_member` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT COMMENT 'id',
  `room_id` bigint(20) NOT NULL COMMENT '房间id',
  `uid` bigint(20) NOT NULL COMMENT '成员uid',
  `type` int(11) NOT NULL COMMENT '成员类型 1群主 2管理员 3普通成员',
  `create_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '创建时间',
  `update_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3) COMMENT '修改时间',
  PRIMARY KEY (`id`) USING BTREE,
  KEY `idx_room_id_type` (`room_id`,`type`) USING BTREE,
  KEY `idx_create_time` (`create_time`) USING BTREE,
  KEY `idx_update_time` (`update_time`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='群成员表';

CREATE TABLE `contact` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT COMMENT 'id',
  `uid` bigint(20) NOT NULL COMMENT 'uid',
  `type` int(11) NOT NULL COMMENT '聊天类型 1单聊 2普通群聊',
  `hot_flag` int(11) DEFAULT '0' COMMENT '是否全员展示 0否 1是',
  `target_id` bigint(20) NOT NULL COMMENT '聊天对象type=1:uid，type=2:房间id',
  `read_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '阅读到的时间',
  `active_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '会话内消息最后更新的时间(只有普通会话需要维护，全员会话不需要维护)',
  `create_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '创建时间',
  `update_time` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3) COMMENT '修改时间',
  PRIMARY KEY (`id`) USING BTREE,
  UNIQUE KEY `uniq_uid_target_id_type` (`uid`,`target_id`,`type`) USING BTREE,
  KEY `idx_target_id_read_time` (`target_id`,`read_time`) USING BTREE,
  KEY `idx_create_time` (`create_time`) USING BTREE,
  KEY `idx_update_time` (`update_time`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='会话列表';