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Implement message loading logic in explorer
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2 changes: 1 addition & 1 deletion
2
...essenger/Explorer/IMessageModelFactory.cs → ...xplorer/Factories/IMessageModelFactory.cs
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98 changes: 98 additions & 0 deletions
98
src/Tel.Egram.Model/Messenger/Explorer/Loaders/InitMessageLoader.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Reactive.Linq; | ||
| using System.Threading; | ||
| using DynamicData; | ||
| using ReactiveUI; | ||
| using Splat; | ||
| using Tel.Egram.Model.Messenger.Explorer.Factories; | ||
| using Tel.Egram.Model.Messenger.Explorer.Messages; | ||
| using Tel.Egram.Services.Messaging.Chats; | ||
| using Tel.Egram.Services.Messaging.Messages; | ||
| using Tel.Egram.Services.Utils.Reactive; | ||
|
|
||
| namespace Tel.Egram.Model.Messenger.Explorer.Loaders | ||
| { | ||
| public class InitMessageLoader | ||
| { | ||
| private readonly MessageLoaderConductor _conductor; | ||
|
|
||
| private readonly IChatLoader _chatLoader; | ||
| private readonly IMessageLoader _messageLoader; | ||
| private readonly IMessageModelFactory _messageModelFactory; | ||
|
|
||
| public InitMessageLoader( | ||
| MessageLoaderConductor conductor) | ||
| : this( | ||
| Locator.Current.GetService<IChatLoader>(), | ||
| Locator.Current.GetService<IMessageLoader>(), | ||
| Locator.Current.GetService<IMessageModelFactory>()) | ||
| { | ||
| _conductor = conductor; | ||
| } | ||
|
|
||
| public InitMessageLoader( | ||
| IChatLoader chatLoader, | ||
| IMessageLoader messageLoader, | ||
| IMessageModelFactory messageModelFactory) | ||
| { | ||
| _chatLoader = chatLoader; | ||
| _messageLoader = messageLoader; | ||
| _messageModelFactory = messageModelFactory; | ||
| } | ||
|
|
||
| public IDisposable Bind( | ||
| ExplorerModel model, | ||
| Chat chat) | ||
| { | ||
| return model.WhenAnyValue(m => m.VisibleRange) | ||
| .Where(r => model.SourceItems.Count == 0) // only initial | ||
| .Where(r => !_conductor.IsBusy) // ignore if other load are already in progress | ||
| .Synchronize(_conductor.Locker) | ||
| .SelectSeq(r => StartLoading(chat)) | ||
| .ObserveOn(RxApp.MainThreadScheduler) | ||
| .Accept(list => HandleLoading(model, list)); | ||
| } | ||
|
|
||
| private IObservable<IList<MessageModel>> StartLoading( | ||
| Chat chat) | ||
| { | ||
| Console.WriteLine("Start init: {0}", Thread.CurrentThread.ManagedThreadId); | ||
| _conductor.IsBusy = true; | ||
|
|
||
| return LoadInitMessages(chat) | ||
| .ObserveOn(RxApp.TaskpoolScheduler) | ||
| .SubscribeOn(RxApp.MainThreadScheduler) | ||
| .Finally(() => | ||
| { | ||
| _conductor.IsBusy = false; | ||
| }); | ||
| } | ||
|
|
||
| private void HandleLoading( | ||
| ExplorerModel model, | ||
| IList<MessageModel> messageModels) | ||
| { | ||
| Console.WriteLine("End init"); | ||
| model.SourceItems.AddRange(messageModels); | ||
| } | ||
|
|
||
| private IObservable<IList<MessageModel>> LoadInitMessages( | ||
| Chat chat) | ||
| { | ||
| return _chatLoader.LoadChat(chat.ChatData.Id) | ||
| .SelectSeq(c => GetInitMessages(c) | ||
| .Select(_messageModelFactory.CreateMessage) | ||
| .ToList()) | ||
| .Select(list => list.Reverse().ToList()); | ||
| } | ||
|
|
||
| private IObservable<Message> GetInitMessages( | ||
| Chat chat) | ||
| { | ||
| var fromMessageId = chat.ChatData.LastReadInboxMessageId; | ||
| return _messageLoader.LoadInitMessages(chat, fromMessageId, 32); | ||
| } | ||
| } | ||
| } |
9 changes: 9 additions & 0 deletions
9
src/Tel.Egram.Model/Messenger/Explorer/Loaders/MessageLoaderConductor.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| namespace Tel.Egram.Model.Messenger.Explorer.Loaders | ||
| { | ||
| public class MessageLoaderConductor | ||
| { | ||
| public object Locker { get; } = new object(); | ||
|
|
||
| public bool IsBusy { get; set; } | ||
| } | ||
| } |
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