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HostHook.cs
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using ElectronNET.API.Serialization;
using System;
using System.Text.Json;
using System.Threading.Tasks;
namespace ElectronNET.API
{
/// <summary>
/// Allows you to execute native JavaScript/TypeScript code from the host process.
///
/// It is only possible if the Electron.NET CLI has previously added an
/// ElectronHostHook directory:
/// <c>electronize add HostHook</c>
/// </summary>
public sealed class HostHook
{
private static HostHook _electronHostHook;
private static object _syncRoot = new object();
private string oneCallguid = Guid.NewGuid().ToString();
internal HostHook()
{
}
internal static HostHook Instance
{
get
{
if (_electronHostHook == null)
{
lock (_syncRoot)
{
if (_electronHostHook == null)
{
_electronHostHook = new HostHook();
}
}
}
return _electronHostHook;
}
}
/// <summary>
/// Execute native JavaScript/TypeScript code.
/// </summary>
/// <param name="socketEventName">Socket name registered on the host.</param>
/// <param name="arguments">Optional parameters.</param>
public void Call(string socketEventName, params dynamic[] arguments)
{
BridgeConnector.Socket.Once<string>(socketEventName + "Error" + oneCallguid, (result) => { Electron.Dialog.ShowErrorBox("Host Hook Exception", result); });
BridgeConnector.Socket.Emit(socketEventName, arguments, oneCallguid);
}
/// <summary>
/// Execute native JavaScript/TypeScript code.
/// </summary>
/// <typeparam name="T">Results from the executed host code.</typeparam>
/// <param name="socketEventName">Socket name registered on the host.</param>
/// <param name="arguments">Optional parameters.</param>
/// <returns></returns>
public Task<T> CallAsync<T>(string socketEventName, params dynamic[] arguments)
{
var tcs = new TaskCompletionSource<T>();
string guid = Guid.NewGuid().ToString();
BridgeConnector.Socket.Once<string>(socketEventName + "Error" + guid, (result) =>
{
Electron.Dialog.ShowErrorBox("Host Hook Exception", result);
tcs.SetException(new Exception($"Host Hook Exception {result}"));
});
BridgeConnector.Socket.Once<JsonElement>(socketEventName + "Complete" + guid, (result) =>
{
BridgeConnector.Socket.Off(socketEventName + "Error" + guid);
T data = default;
try
{
data = result.Deserialize<T>(ElectronJson.Options);
}
catch (Exception exception)
{
tcs.SetException(exception);
}
tcs.SetResult(data);
});
BridgeConnector.Socket.Emit(socketEventName, arguments, guid);
return tcs.Task;
}
}
}