public async Task <LCUser> GetUser(string id)
{
if (users.TryGetValue(id, out LCUser user))
{
return(user);
}
if (fetchUserTasks.TryGetValue(id, out Task <LCUser> runningTask))
{
return(await runningTask);
}
Task <LCUser> task = LCUser.GetQuery().Get(id);
fetchUserTasks.Add(id, task);
user = await task;
fetchUserTasks.Remove(id);
users[id] = user;
return(user);
}
static void Main(string[] args)
{
WriteLine("Hello World!");
SingleThreadSynchronizationContext.Run(async() => {
LCLogger.LogDelegate += Print;
LCApplication.Initialize("ikGGdRE2YcVOemAaRbgp1xGJ-gzGzoHsz",
"NUKmuRbdAhg1vrb2wexYo1jo",
"https://ikggdre2.lc-cn-n1-shared.com");
await LCUser.Login("hello", "world");
LCQuery <LCUser> userQuery = LCUser.GetQuery();
userQuery.WhereEqualTo("username", "hello");
LCLiveQuery userLiveQuery = await userQuery.Subscribe();
userLiveQuery.OnLogin = (user) => {
WriteLine($"login: {user.Username}");
};
LCQuery <LCObject> query = new LCQuery <LCObject>("Account");
query.WhereGreaterThan("balance", 100);
LCLiveQuery liveQuery = await query.Subscribe();
liveQuery.OnCreate = (obj) => {
WriteLine($"create: {obj}");
};
liveQuery.OnUpdate = (obj, keys) => {
WriteLine($"update: {obj}");
WriteLine(keys.Count);
};
liveQuery.OnDelete = (objId) => {
WriteLine($"delete: {objId}");
};
liveQuery.OnEnter = (obj, keys) => {
WriteLine($"enter: {obj}");
WriteLine(keys.Count);
};
liveQuery.OnLeave = (obj, keys) => {
WriteLine($"leave: {obj}");
WriteLine(keys.Count);
};
});
}
public async Task Login()
{
TaskCompletionSource <object> tcs = new TaskCompletionSource <object>();
await LCUser.Login("hello", "world");
LCQuery <LCUser> userQuery = LCUser.GetQuery();
userQuery.WhereEqualTo("username", "hello");
LCLiveQuery userLiveQuery = await userQuery.Subscribe();
userLiveQuery.OnLogin = (user) => {
WriteLine($"login: {user}");
tcs.SetResult(null);
};
// 模拟 REST API
string url = "https://ikggdre2.lc-cn-n1-shared.com/1.1/login";
HttpRequestMessage request = new HttpRequestMessage {
RequestUri = new Uri(url),
Method = HttpMethod.Post
};
request.Headers.Add("X-LC-Id", "ikGGdRE2YcVOemAaRbgp1xGJ-gzGzoHsz");
request.Headers.Add("X-LC-Key", "NUKmuRbdAhg1vrb2wexYo1jo");
string content = JsonConvert.SerializeObject(new Dictionary <string, object> {
{ "username", "hello" },
{ "password", "world" }
});
StringContent requestContent = new StringContent(content);
requestContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
request.Content = requestContent;
HttpClient client = new HttpClient();
await client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
await tcs.Task;
}