feat(CreateAnnotationCommand): implement CreateAnnotationCommand and handler logic

Added full implementation for CreateAnnotationCommand and its handler:
- Introduced `PSPDFKitInstantJSON` property to the command
- Injected repositories for `Signature` and `Annotation`
- Implemented query filtering for Envelope and Receiver
- Added annotation creation from parsed PSPDFKit JSON
- Created helper method `ParsePSPDFKitInstantJSON` for JSON parsing

EnvelopeGenerator.Application/Annotations/Commands/CreateAnnotationCommand.cs

@@ -1,18 +1,50 @@
-using EnvelopeGenerator.Application.Common.Query;
+using DigitalData.Core.Abstraction.Application.Repository;
+using EnvelopeGenerator.Application.Common.Extensions;
+using EnvelopeGenerator.Application.Common.Query;
+using EnvelopeGenerator.Domain.Entities;
 using MediatR;
+using Microsoft.EntityFrameworkCore;
+using System.Text.Json.Serialization;
 
 namespace EnvelopeGenerator.Application.Annotations.Commands;
 
 /// <summary>
 /// 
 /// </summary>
-public record CreateAnnotationCommand : EnvelopeReceiverQueryBase, IRequest;
+public record CreateAnnotationCommand : EnvelopeReceiverQueryBase, IRequest
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    [JsonIgnore]
+    public string PSPDFKitInstantJSON { get; set; } = null!;
+}
 
 /// <summary>
 /// 
 /// </summary>
 public class CreateAnnotationCommandHandler : IRequestHandler<CreateAnnotationCommand>
 {
+    /// <summary>
+    /// 
+    /// </summary>
+    private readonly IRepository<Signature> _signRepo;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    private readonly IRepository<Annotation> _annotRepo;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="signRepo"></param>
+    public CreateAnnotationCommandHandler(IRepository<Signature> signRepo, IRepository<Annotation> annotRepo)
+    {
+        _signRepo = signRepo;
+        _annotRepo = annotRepo;
+    }
+
     /// <summary>
     /// 
     /// </summary>
@@ -20,8 +52,50 @@ public class CreateAnnotationCommandHandler : IRequestHandler<CreateAnnotationCo
     /// <param name="cancel"></param>
     /// <returns></returns>
     /// <exception cref="NotImplementedException"></exception>
-    public Task Handle(CreateAnnotationCommand request, CancellationToken cancel)
+    public async Task Handle(CreateAnnotationCommand request, CancellationToken cancel)
     {
-        throw new NotImplementedException();
+        var query = _signRepo.Query;
+
+        #region Envelope Query
+        if (request.Envelope.Id is int envelopeId)
+            query = query.Where(annot => annot.Document.EnvelopeId == envelopeId);
+        
+        if (request.Envelope.Uuid is string envelopeUuid)
+            query = query.Where(annot => annot.Document.Envelope!.Uuid == envelopeUuid);
+        #endregion
+
+        // Receiver Query
+        query = query.Where(request.Receiver);
+
+        var elements = await query.ToListAsync(cancel);
+
+        foreach (var element in elements)
+        {
+            var annots = ParsePSPDFKitInstantJSON(request.PSPDFKitInstantJSON, element.Id)
+                .Select(annot => new Annotation()
+                {
+                    ElementId = element.Id,
+                    Name = annot.Key,
+                    Value = annot.Value,
+                    AddedWhen = DateTime.UtcNow
+                });
+
+            await _annotRepo.CreateAsync(annots, cancel);
+        }
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="json"></param>
+    /// <param name="elementId"></param>
+    /// <returns></returns>
+    public static Dictionary<string, string> ParsePSPDFKitInstantJSON(string json, int elementId)
+    {
+        Dictionary<string, string> annots = new();
+
+        // parse json here
+
+        return annots;
     }
 }

EnvelopeGenerator.Application/EnvelopeGenerator.Application.csproj

@@ -14,7 +14,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="Dapper" Version="2.1.66" />
-		<PackageReference Include="DigitalData.Core.Abstraction.Application" Version="1.3.5" />
+		<PackageReference Include="DigitalData.Core.Abstraction.Application" Version="1.3.6" />
 		<PackageReference Include="DigitalData.Core.Application" Version="3.4.0" />
 		<PackageReference Include="DigitalData.Core.Client" Version="2.1.0" />
 		<PackageReference Include="DigitalData.Core.Exceptions" Version="1.1.0" />