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MiddlewareActionHandler.cs
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MiddlewareActionHandler.cs
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using SharedLibraryCore.Interfaces;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using ILogger = Microsoft.Extensions.Logging.ILogger;
namespace IW4MAdmin.Application.Misc
{
class MiddlewareActionHandler : IMiddlewareActionHandler
{
private readonly IDictionary<string, IList<object>> _actions;
private readonly ILogger _logger;
public MiddlewareActionHandler(ILogger<MiddlewareActionHandler> logger)
{
_actions = new Dictionary<string, IList<object>>();
_logger = logger;
}
/// <summary>
/// Executes the action with the given name
/// </summary>
/// <typeparam name="T">Execution return type</typeparam>
/// <param name="value">Input value</param>
/// <param name="name">Name of action to execute</param>
/// <returns></returns>
public async Task<T> Execute<T>(T value, string name = null)
{
string key = string.IsNullOrEmpty(name) ? typeof(T).ToString() : name;
if (_actions.ContainsKey(key))
{
foreach (var action in _actions[key])
{
try
{
value = await ((IMiddlewareAction<T>)action).Invoke(value);
}
catch (Exception e)
{
_logger.LogWarning(e, "Failed to invoke middleware action {name}", name);
}
}
return value;
}
return value;
}
/// <summary>
/// Registers an action by name
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="actionType">Action type specifier</param>
/// <param name="action">Action to perform</param>
/// <param name="name">Name of action</param>
public void Register<T>(T actionType, IMiddlewareAction<T> action, string name = null)
{
string key = string.IsNullOrEmpty(name) ? typeof(T).ToString() : name;
if (_actions.ContainsKey(key))
{
_actions[key].Add(action);
}
else
{
_actions.Add(key, new[] { action });
}
}
}
}