public static Task <AVLiveQuery <T> > CreateAsync <T>(this AVQuery <T> query, string sessionToken = "", CancellationToken cancellationToken = default(CancellationToken)) where T : AVObject
{
Dictionary <string, object> strs = new Dictionary <string, object>()
{
{ "where", query.Condition },
{ "className", query.GetClassName <T>() },
{ "sessionToken", sessionToken }
};
var command = new AVCommand("LiveQuery/subscribe",
"POST",
sessionToken: sessionToken,
data: strs);
return(AVPlugins.Instance.CommandRunner.RunCommandAsync(command).OnSuccess(t =>
{
var subscriptionId = t.Result.Item2["id"] as string;
var queryId = t.Result.Item2["query_id"] as string;
var rtn = new AVLiveQuery <T>(subscriptionId)
{
Query = query,
QueryId = queryId
};
return rtn;
}));
}
/// <summary>
/// AVQuery 订阅 AVLiveQuery 的扩展方法
/// </summary>
/// <returns>AVLiveQuery 对象</returns>
/// <param name="query">Query.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
public static async Task <AVLiveQuery <T> > SubscribeAsync <T>(this AVQuery <T> query, CancellationToken cancellationToken = default(CancellationToken)) where T : AVObject
{
var liveQuery = new AVLiveQuery <T>(query);
liveQuery = await liveQuery.SubscribeAsync();
return(liveQuery);
}
public static Task <AVLiveQuery <T> > SubscribeAsync <T>(this AVQuery <T> query, string sessionToken = "", CancellationToken cancellationToken = default(CancellationToken)) where T : AVObject
{
AVLiveQuery <T> rtn = null;
if (sessionToken == "")
{
if (AVUser.CurrentUser != null)
{
sessionToken = AVUser.CurrentUser.SessionToken;
}
}
return(CreateAsync(query, sessionToken, cancellationToken).OnSuccess(_ =>
{
rtn = _.Result;
if (Open)
{
return Task.FromResult(rtn);
}
if (AVRealtime.Instance == null)
{
throw new NullReferenceException("before subscribe live query, plaese call new AVRealtime(config) to initalize Realtime module.");
}
return AVRealtime.Instance.OpenAsync().OnSuccess(t =>
{
var liveQueryLogInCmd = new AVIMCommand()
.Option("login")
.Argument("installationId", rtn.Id)
.Argument("service", 1);
return AVRealtime.AVIMCommandRunner.RunCommandAsync(liveQueryLogInCmd);
}).Unwrap().OnSuccess(s =>
{
Open = true;
AVRealtime.Instance.NoticeReceived += (sender, e) =>
{
if (e.CommandName == "data")
{
var ids = AVDecoder.Instance.DecodeList <string>(e.RawData["ids"]);
var msg = e.RawData["msg"] as IEnumerable <object>;
if (msg != null)
{
var receivedPayloads = from item in msg
select item as Dictionary <string, object>;
if (receivedPayloads != null)
{
var matchedPayloads = receivedPayloads.Where(item =>
{
if (!item.ContainsKey("query_id"))
{
return false;
}
var query_id = item["query_id"].ToString();
return query_id == rtn.QueryId;
});
foreach (var payload in matchedPayloads)
{
var scope = payload["op"].ToString();
var payloadMap = payload["object"] as Dictionary <string, object>;
rtn.Emit(scope, payloadMap);
}
}
}
}
};
return rtn;
});
}).Unwrap());
}
