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382 lines (328 loc) · 13.8 KB
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// ReSharper disable InconsistentNaming
namespace ElectronNET.API
{
using Common;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System;
using System.Collections.Concurrent;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
public abstract class ApiBase
{
protected enum SocketTaskEventNameTypes
{
DashesLowerFirst,
NoDashUpperFirst
}
protected enum SocketTaskMessageNameTypes
{
DashesLowerFirst,
NoDashUpperFirst
}
protected enum SocketEventNameTypes
{
DashedLower,
CamelCase,
}
private static readonly TimeSpan InvocationTimeout = 1000.ms();
private readonly string objectName;
private readonly ConcurrentDictionary<string, Invocator> invocators;
private readonly ConcurrentDictionary<string, string> invocationEventNames = new();
private readonly ConcurrentDictionary<string, string> invocationMessageNames = new();
private readonly ConcurrentDictionary<string, string> methodMessageNames = new();
private static readonly ConcurrentDictionary<string, EventContainer> eventContainers = new();
private static readonly ConcurrentDictionary<string, ConcurrentDictionary<string, Invocator>> AllInvocators = new();
private readonly object objLock = new object();
public virtual int Id
{
get => -1;
// ReSharper disable once ValueParameterNotUsed
protected set
{
}
}
protected abstract SocketTaskEventNameTypes SocketTaskEventNameType { get; }
protected virtual SocketTaskMessageNameTypes SocketTaskMessageNameType => SocketTaskMessageNameTypes.NoDashUpperFirst;
protected virtual SocketEventNameTypes SocketEventNameType => SocketEventNameTypes.DashedLower;
protected ApiBase()
{
this.objectName = this.GetType().Name.LowerFirst();
this.invocators = AllInvocators.GetOrAdd(this.objectName, _ => new ConcurrentDictionary<string, Invocator>());
}
protected void CallMethod0([CallerMemberName] string callerName = null)
{
var messageName = this.methodMessageNames.GetOrAdd(callerName, s => this.objectName + s);
if (this.Id >= 0)
{
BridgeConnector.Socket.Emit(messageName, this.Id);
}
else
{
BridgeConnector.Socket.Emit(messageName);
}
}
protected void CallMethod1(object val1, [CallerMemberName] string callerName = null)
{
var messageName = this.methodMessageNames.GetOrAdd(callerName, s => this.objectName + s);
if (this.Id >= 0)
{
BridgeConnector.Socket.Emit(messageName, this.Id, val1);
}
else
{
BridgeConnector.Socket.Emit(messageName, val1);
}
}
protected void CallMethod2(object val1, object val2, [CallerMemberName] string callerName = null)
{
var messageName = this.methodMessageNames.GetOrAdd(callerName, s => this.objectName + s);
if (this.Id >= 0)
{
BridgeConnector.Socket.Emit(messageName, this.Id, val1, val2);
}
else
{
BridgeConnector.Socket.Emit(messageName, val1, val2);
}
}
protected void CallMethod3(object val1, object val2, object val3, [CallerMemberName] string callerName = null)
{
var messageName = this.methodMessageNames.GetOrAdd(callerName, s => this.objectName + s);
if (this.Id >= 0)
{
BridgeConnector.Socket.Emit(messageName, this.Id, val1, val2, val3);
}
else
{
BridgeConnector.Socket.Emit(messageName, val1, val2, val3);
}
}
protected Task<T> InvokeAsync<T>(object arg = null, [CallerMemberName] string callerName = null)
{
return this.InvokeAsyncWithTimeout<T>(InvocationTimeout, arg, callerName);
}
protected Task<T> InvokeAsyncWithTimeout<T>(TimeSpan invocationTimeout, object arg = null, [CallerMemberName] string callerName = null)
{
Debug.Assert(callerName != null, nameof(callerName) + " != null");
lock (this.objLock)
{
return this.invocators.GetOrAdd(callerName, _ =>
{
var getter = new Invocator<T>(this, callerName, invocationTimeout, arg);
getter.Task<T>().ContinueWith(_ =>
{
lock (this.objLock)
{
return this.invocators.TryRemove(callerName, out var _);
}
});
return getter;
}).Task<T>();
}
}
protected void AddEvent(Action value, int? id = null, [CallerMemberName] string callerName = null)
{
Debug.Assert(callerName != null, nameof(callerName) + " != null");
var eventName = this.EventName(callerName);
var eventKey = this.EventKey(eventName, id);
lock (this.objLock)
{
var container = eventContainers.GetOrAdd(eventKey, _ =>
{
var container = new EventContainer();
BridgeConnector.Socket.On(eventKey, container.OnEventAction);
BridgeConnector.Socket.Emit($"register-{eventName}", id);
return container;
});
container.Register(value);
}
}
protected void RemoveEvent(Action value, int? id = null, [CallerMemberName] string callerName = null)
{
Debug.Assert(callerName != null, nameof(callerName) + " != null");
var eventName = this.EventName(callerName);
var eventKey = this.EventKey(eventName, id);
lock (this.objLock)
{
if (eventContainers.TryGetValue(eventKey, out var container) && !container.Unregister(value))
{
BridgeConnector.Socket.Off(eventKey);
eventContainers.TryRemove(eventKey, out _);
}
}
}
protected void AddEvent<T>(Action<T> value, int? id = null, [CallerMemberName] string callerName = null)
{
Debug.Assert(callerName != null, nameof(callerName) + " != null");
var eventName = this.EventName(callerName);
var eventKey = this.EventKey(eventName, id);
lock (this.objLock)
{
var container = eventContainers.GetOrAdd(eventKey, _ =>
{
var container = new EventContainer();
BridgeConnector.Socket.On<T>(eventKey, container.OnEventActionT);
BridgeConnector.Socket.Emit($"register-{eventName}", id);
return container;
});
container.Register(value);
}
}
protected void RemoveEvent<T>(Action<T> value, int? id = null, [CallerMemberName] string callerName = null)
{
Debug.Assert(callerName != null, nameof(callerName) + " != null");
var eventName = this.EventName(callerName);
var eventKey = this.EventKey(eventName, id);
lock (this.objLock)
{
if (eventContainers.TryGetValue(eventKey, out var container) && !container.Unregister(value))
{
BridgeConnector.Socket.Off(eventKey);
eventContainers.TryRemove(eventKey, out _);
}
}
}
private string EventName(string callerName)
{
switch (this.SocketEventNameType)
{
case SocketEventNameTypes.DashedLower:
return $"{this.objectName}-{callerName.ToDashedEventName()}";
case SocketEventNameTypes.CamelCase:
return $"{this.objectName}-{callerName.ToCamelCaseEventName()}";
default:
throw new ArgumentOutOfRangeException();
}
}
private string EventKey(string eventName, int? id)
{
return string.Format(CultureInfo.InvariantCulture, "{0}{1:D}", eventName, id);
}
internal abstract class Invocator
{
public abstract Task<T> Task<T>();
}
internal class Invocator<T> : Invocator
{
private readonly Task<T> tcsTask;
private TaskCompletionSource<T> tcs;
public Invocator(ApiBase apiBase, string callerName, TimeSpan timeout, object arg = null)
{
this.tcs = new TaskCompletionSource<T>(TaskCreationOptions.RunContinuationsAsynchronously);
this.tcsTask = this.tcs.Task;
string eventName;
string messageName;
switch (apiBase.SocketTaskEventNameType)
{
case SocketTaskEventNameTypes.DashesLowerFirst:
eventName = apiBase.invocationEventNames.GetOrAdd(callerName, s => $"{apiBase.objectName}-{s.StripAsync().LowerFirst()}-completed");
break;
case SocketTaskEventNameTypes.NoDashUpperFirst:
eventName = apiBase.invocationEventNames.GetOrAdd(callerName, s => $"{apiBase.objectName}{s.StripAsync()}Completed");
break;
default:
throw new ArgumentOutOfRangeException();
}
switch (apiBase.SocketTaskMessageNameType)
{
case SocketTaskMessageNameTypes.DashesLowerFirst:
messageName = apiBase.invocationMessageNames.GetOrAdd(callerName, s => $"{apiBase.objectName}-{s.StripAsync().LowerFirst()}");
break;
case SocketTaskMessageNameTypes.NoDashUpperFirst:
messageName = apiBase.invocationMessageNames.GetOrAdd(callerName, s => apiBase.objectName + s.StripAsync());
break;
default:
throw new ArgumentOutOfRangeException();
}
BridgeConnector.Socket.Once<T>(eventName, (result) =>
{
lock (this)
{
try
{
var value = result;
this.tcs?.SetResult(value);
}
catch (Exception ex)
{
this.tcs?.TrySetException(ex);
}
finally
{
this.tcs = null;
}
}
});
if (arg != null)
{
_ = apiBase.Id >= 0 ? BridgeConnector.Socket.Emit(messageName, apiBase.Id, arg) : BridgeConnector.Socket.Emit(messageName, arg);
}
else
{
_ = apiBase.Id >= 0 ? BridgeConnector.Socket.Emit(messageName, apiBase.Id) : BridgeConnector.Socket.Emit(messageName);
}
System.Threading.Tasks.Task.Delay(timeout).ContinueWith(_ =>
{
if (this.tcs != null)
{
lock (this)
{
if (this.tcs != null)
{
var ex = new TimeoutException(
$"No response after {(long)timeout.TotalMilliseconds}ms trying to retrieve value {apiBase.objectName}.{callerName}()"
);
this.tcs.TrySetException(ex);
this.tcs = null;
}
}
}
});
}
public override Task<T1> Task<T1>()
{
return this.tcsTask as Task<T1>;
}
}
[SuppressMessage("ReSharper", "InconsistentlySynchronizedField")]
private class EventContainer
{
private Action eventAction;
private Delegate eventActionT;
private Action<T> GetEventActionT<T>()
{
return (Action<T>)this.eventActionT;
}
private void SetEventActionT<T>(Action<T> actionT)
{
this.eventActionT = actionT;
}
public void OnEventAction() => this.eventAction?.Invoke();
public void OnEventActionT<T>(T p) => this.GetEventActionT<T>()?.Invoke(p);
public void Register(Action receiver)
{
this.eventAction += receiver;
}
public void Register<T>(Action<T> receiver)
{
var actionT = this.GetEventActionT<T>();
actionT += receiver;
this.SetEventActionT(actionT);
}
public bool Unregister(Action receiver)
{
this.eventAction -= receiver;
return this.eventAction != null;
}
public bool Unregister<T>(Action<T> receiver)
{
var actionT = this.GetEventActionT<T>();
actionT -= receiver;
this.SetEventActionT(actionT);
return actionT != null;
}
}
}
}