/// <summary>
/// 新增订阅者
/// </summary>
/// <param name="subscriber">订阅者对象</param>
/// <param name="isTemporary">是否临时保存</param>
/// <returns>结果</returns>
public async Task<bool> AddSubscriber(Subscriber subscriber, bool isTemporary = false)
{
//判断是否为有效订阅者
if (instance.SubscriberList.Contains(subscriber) || subscriber.TopicName == "fnd" || subscriber.TopicName == "me")
{
//无效订阅者返回假
return false;
}
//判断是否为临时查询
if (isTemporary == true)
{
if (searchSubscriberResult.Contains(subscriber))
{
return false;
}
searchSubscriberResult.Add(subscriber);
return true;
}
//获取已存在话题或创建话题
Topic newTopic = GetTopicByName(subscriber.TopicName);
if (newTopic == null)
{
newTopic = new Topic(subscriber.TopicName);
}
if (newTopic == null)
{
newTopic = new Topic(subscriber.TopicName);
}
//话题列表更新
await AddTopic(newTopic);
//数据库更新
TopicController topicController = await GetTopicController(newTopic);
topicController.UpsertTopic();
//订阅者列表更新
instance.SubscriberList.Add(subscriber);
//数据库更新
SubscriberController subscriberController = new SubscriberController(db.Subscribers);
subscriberController.SetSubscriber(subscriber);
subscriberController.UpsertSubscriber();
//服务器更新
client.SubscribeTopic(newTopic);
return true;
}
/// <summary>
/// 取消置顶话题
/// </summary>
/// <param name="topic">话题</param>
/// <returns>结果</returns>
public async Task<bool> UnpinTopic(Topic topic)
{
if (!instance.TopicList.Contains(topic) || topic.Weight == 0)
{
return false;
}
//权重置为0
topic.Weight = 0;
//数据库更新
TopicController topicController = await GetTopicController(topic);
topicController.UpsertTopic();
return true;
}
/// <summary>
/// 订阅话题
/// </summary>
/// <param name="topic">话题</param>
/// <returns>结果</returns>
public async Task<bool> AddTopic(Topic topic)
{
if (instance.TopicList.Contains(topic) || topic.Name.Equals("me") || topic.Name.Equals("fnd"))
{
return false;
}
//话题列表更新
instance.TopicList.Add(topic);
//数据库更新
TopicController topicController = await GetTopicController(topic);
topicController.UpsertTopic();
return true;
}
/// <summary>
/// 移动话题
/// </summary>
/// <param name="topic">话题</param>
/// <returns></returns>
public async Task<bool> MoveTopic(Topic topic)
{
if (!instance.TopicList.Contains(topic))
{
return false;
}
//话题列表更新
int oldPosition = instance.TopicList.IndexOf(topic);
instance.TopicList.RemoveAt(oldPosition);
instance.TopicList.Insert(0, topic);
//数据库更新
TopicController topicController = await GetTopicController(topic);
topicController.UpsertTopic();
return true;
}
/// <summary>
/// 移除话题
/// </summary>
/// <param name="topic">话题</param>
/// <returns>结果</returns>
public async Task<bool> RemoveTopic(Topic topic)
{
if (!instance.TopicList.Contains(topic))
{
return false;
}
instance.TopicList.Remove(topic);
topic.IsArchived = true;
//数据库更新
TopicController topicController = await GetTopicController(topic);
topicController.UpsertTopic();
//话题列表更新
instance.TopicList.Remove(topic);
//服务器更新
client.RemoveTopic(topic);
return true;
}