feat: Implement initialization exceptions handling and add API endpoint for retrieval

src/PepperDash.Essentials.Core/DeviceTypeInterfaces/IInitializationExceptions.cs

@@ -0,0 +1,16 @@
+
+
+using System.Collections.Generic;
+
+namespace PepperDash.Essentials.Core.DeviceTypeInterfaces;
+
+/// <summary>
+/// Defines the contract for devices that can report initialization exceptions. 
+/// </summary>
+public interface IInitializationExceptions
+{
+    /// <summary>
+    /// Gets a list of exceptions that occurred during the initialization of the program.
+    /// </summary>
+    List<System.Exception> InitializationExceptions { get; }
+}

src/PepperDash.Essentials.Core/Web/EssentialsWebApi.cs

@@ -184,6 +184,11 @@ public class EssentialsWebApi : EssentialsDevice
                 Name = "Get Routing Devices and TieLines",
                 RouteHandler = new GetRoutingDevicesAndTieLinesHandler()
             },
+            new HttpCwsRoute("initializationExceptions")
+            {
+                Name = "Get Initialization Exceptions",
+                RouteHandler = new GetInitializationExceptionsRequestHandler()
+            }
         };
 
         AddRoute(routes);
@@ -296,4 +301,5 @@ public class EssentialsWebApi : EssentialsDevice
 
         Debug.LogMessage(LogEventLevel.Information, this, new string('-', 50));
     }
-}
+}
+

src/PepperDash.Essentials.Core/Web/RequestHandlers/GetInitializationExceptionRequestHandler.cs

@@ -0,0 +1,50 @@
+
+using Crestron.SimplSharp.WebScripting;
+using System.Collections.Generic;
+using System.Text;
+using PepperDash.Essentials.Core.DeviceTypeInterfaces;
+using PepperDash.Core.Web.RequestHandlers;
+using System.Linq;
+
+namespace PepperDash.Essentials.Core.Web.RequestHandlers;
+
+/// <summary>
+/// Request handler for retrieving initialization exceptions from the control system.
+/// </summary>
+public class GetInitializationExceptionsRequestHandler : WebApiBaseRequestHandler
+{
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="GetInitializationExceptionsRequestHandler"/> class.
+    /// </summary>
+    public GetInitializationExceptionsRequestHandler() : base(true) { }
+
+    /// <inheritdoc />
+    protected override void HandleGet(HttpCwsContext context)
+    {
+        var exceptions = (Global.ControlSystem as IInitializationExceptions)?.InitializationExceptions ?? new List<System.Exception>();
+
+        var response = Newtonsoft.Json.JsonConvert.SerializeObject(new
+        {
+            Exceptions = exceptions.Select(e => new
+            {
+                Message = e.Message,
+                StackTrace = e.StackTrace,
+                Type = e.GetType().FullName,
+                InnerException = e.InnerException != null ? new
+                {
+                    Message = e.InnerException.Message,
+                    StackTrace = e.InnerException.StackTrace,
+                    Type = e.InnerException.GetType().FullName
+                } : null
+            }).ToList()
+        });
+
+        context.Response.StatusCode = 200;
+        context.Response.StatusDescription = "OK";
+        context.Response.ContentType = "application/json";
+        context.Response.ContentEncoding = Encoding.UTF8;
+        context.Response.Write(response, false);
+        context.Response.End();
+    }
+}

src/PepperDash.Essentials/ControlSystem.cs

@@ -18,6 +18,8 @@ using Timeout = Crestron.SimplSharp.Timeout;
 using Serilog.Events;
 using System.Threading.Tasks;
 using PepperDash.Essentials.Core.Web;
+using System.Collections.Generic;
+using PepperDash.Essentials.Core.DeviceTypeInterfaces;
 
 namespace PepperDash.Essentials;
 
@@ -28,12 +30,19 @@ namespace PepperDash.Essentials;
 /// <remarks>This class extends <see cref="CrestronControlSystem"/> and serves as the entry point for the control
 /// system. It manages the initialization of devices, rooms, tie lines, and other system components. Additionally, it
 /// provides methods for platform determination, configuration loading, and system teardown.</remarks>
-public class ControlSystem : CrestronControlSystem, ILoadConfig
+public class ControlSystem : CrestronControlSystem, ILoadConfig, IInitializationExceptions
 {
     private Timer startTimer;
     private ManualResetEventSlim initializeEvent;
     private const long StartupTime = 500;
 
+    /// <summary>
+    /// List of exceptions that occurred during initialization.
+    /// This can be used to report issues with loading devices or tie lines without crashing the entire system,
+    /// which allows for partial functionality in cases where some components are misconfigured or have issues.
+    /// </summary>
+    public List<Exception> InitializationExceptions { get; private set; } = new List<Exception>();
+
     /// <summary>
     /// Initializes a new instance of the <see cref="ControlSystem"/> class, setting up the system's global state and
     /// dependencies.
@@ -457,6 +466,7 @@ public class ControlSystem : CrestronControlSystem, ILoadConfig
                 }
                 catch (Exception e)
                 {
+                    InitializationExceptions.Add(e);
                     Debug.LogMessage(e, "ERROR: Creating device {deviceKey:l}. Skipping device.", args: new[] { devConf.Key });
                 }
             }
@@ -482,12 +492,22 @@ public class ControlSystem : CrestronControlSystem, ILoadConfig
             return;
         }
 
-        foreach (var tieLineConfig in ConfigReader.ConfigObject.TieLines)
+        try
         {
-            var newTL = tieLineConfig.GetTieLine();
-            if (newTL != null)
-                tlc.Add(newTL);
+
+            foreach (var tieLineConfig in ConfigReader.ConfigObject.TieLines)
+            {
+                var newTL = tieLineConfig.GetTieLine();
+                if (newTL != null)
+                    tlc.Add(newTL);
+            }
         }
+        catch (Exception e)
+        {
+            InitializationExceptions.Add(e);
+            Debug.LogMessage(e, "ERROR: Creating tie line. Skipping tie line.");
+        }
+
 
         Debug.LogMessage(LogEventLevel.Information, "All Tie Lines Loaded.");
 
@@ -796,6 +816,7 @@ public class ControlSystem : CrestronControlSystem, ILoadConfig
             }
             catch (Exception ex)
             {
+                InitializationExceptions.Add(ex);
                 Debug.LogMessage(ex, "Exception loading room {roomKey}:{roomType}", null, roomConfig.Key, roomConfig.Type);
                 continue;
             }