Added API to DiscordBotCore

DiscordBotCore/API/ApiManager.cs

@@ -0,0 +1,67 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using DiscordBotCore.API.Endpoints;
+using DiscordBotCore.API.Endpoints.PluginManagement;
+using DiscordBotCore.Interfaces.API;
+using DiscordBotCore.Others;
+using Microsoft.AspNetCore.Builder;
+
+namespace DiscordBotCore.API;
+
+public class ApiManager
+{
+    private bool IsRunning { get; set; }
+    private List<IEndpoint> ApiEndpoints { get; }
+
+    public ApiManager()
+    {
+        ApiEndpoints = new List<IEndpoint>();
+    }
+    
+    public Result AddEndpoint(IEndpoint endpoint)
+    {
+        if (ApiEndpoints.Contains(endpoint) || ApiEndpoints.Exists(x => x.Path == endpoint.Path))
+        {
+            return Result.Failure("Endpoint already exists");
+        }
+        
+        ApiEndpoints.Add(endpoint);
+        return Result.Success();
+    }
+
+    public void RemoveEndpoint(string endpointPath)
+    {
+        this.ApiEndpoints.RemoveAll(endpoint => endpoint.Path == endpointPath);
+    }
+    
+    public bool EndpointExists(string endpointPath)
+    {
+        return this.ApiEndpoints.Exists(endpoint => endpoint.Path == endpointPath);
+    }
+
+    internal void AddBaseEndpoints()
+    {
+        AddEndpoint(new HomeEndpoint());
+        AddEndpoint(new PluginListEndpoint());
+    }
+    
+    public async Task InitializeApi()
+    {
+        if (IsRunning)
+            return;
+
+        IsRunning = true;
+
+        var builder = WebApplication.CreateBuilder();
+        var app = builder.Build();
+        app.UseRouting();
+
+        EndpointManager manager = new EndpointManager(app);
+        foreach(IEndpoint endpoint in this.ApiEndpoints)
+        {
+            manager.MapEndpoint(endpoint);
+        }
+        
+        await app.RunAsync();
+    }
+}