111 lines
3.9 KiB
C#
111 lines
3.9 KiB
C#
using System;
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using System.Linq;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Threading;
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using System.Threading.Tasks;
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using LeanCloud.Storage.Internal;
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namespace LeanCloud.Storage.Internal
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{
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internal class AVQueryController : IAVQueryController
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{
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private readonly IAVCommandRunner commandRunner;
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public AVQueryController(IAVCommandRunner commandRunner)
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{
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this.commandRunner = commandRunner;
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}
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public Task<IEnumerable<IObjectState>> FindAsync<T>(AVQuery<T> query,
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AVUser user,
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CancellationToken cancellationToken) where T : AVObject
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{
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string sessionToken = user != null ? user.SessionToken : null;
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return FindAsync(query.RelativeUri, query.BuildParameters(), sessionToken, cancellationToken).OnSuccess(t =>
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{
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var items = t.Result["results"] as IList<object>;
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return (from item in items
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select AVObjectCoder.Instance.Decode(item as IDictionary<string, object>, AVDecoder.Instance));
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});
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}
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public Task<int> CountAsync<T>(AVQuery<T> query,
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AVUser user,
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CancellationToken cancellationToken) where T : AVObject
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{
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string sessionToken = user != null ? user.SessionToken : null;
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var parameters = query.BuildParameters();
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parameters["limit"] = 0;
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parameters["count"] = 1;
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return FindAsync(query.RelativeUri, parameters, sessionToken, cancellationToken).OnSuccess(t =>
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{
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return Convert.ToInt32(t.Result["count"]);
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});
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}
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public Task<IObjectState> FirstAsync<T>(AVQuery<T> query,
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AVUser user,
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CancellationToken cancellationToken) where T : AVObject
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{
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string sessionToken = user != null ? user.SessionToken : null;
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var parameters = query.BuildParameters();
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parameters["limit"] = 1;
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return FindAsync(query.RelativeUri, parameters, sessionToken, cancellationToken).OnSuccess(t =>
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{
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var items = t.Result["results"] as IList<object>;
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var item = items.FirstOrDefault() as IDictionary<string, object>;
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// Not found. Return empty state.
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if (item == null)
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{
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return (IObjectState)null;
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}
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return AVObjectCoder.Instance.Decode(item, AVDecoder.Instance);
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});
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}
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private Task<IDictionary<string, object>> FindAsync(string relativeUri,
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IDictionary<string, object> parameters,
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string sessionToken,
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CancellationToken cancellationToken)
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{
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var command = new AVCommand(string.Format("{0}?{1}",
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relativeUri,
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AVClient.BuildQueryString(parameters)),
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method: "GET",
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sessionToken: sessionToken,
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data: null);
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return commandRunner.RunCommandAsync(command, cancellationToken: cancellationToken).OnSuccess(t =>
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{
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return t.Result.Item2;
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});
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}
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//private Task<IDictionary<string, object>> FindAsync(string className,
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// IDictionary<string, object> parameters,
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// string sessionToken,
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// CancellationToken cancellationToken)
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//{
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// var command = new AVCommand(string.Format("classes/{0}?{1}",
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// Uri.EscapeDataString(className),
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// AVClient.BuildQueryString(parameters)),
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// method: "GET",
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// sessionToken: sessionToken,
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// data: null);
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// return commandRunner.RunCommandAsync(command, cancellationToken: cancellationToken).OnSuccess(t =>
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// {
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// return t.Result.Item2;
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// });
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//}
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}
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}
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