Update signature handling and database connection management

- Changed `Signature` properties from `int` to `double` for precise positioning.
- Added necessary using directives in `EnvelopeReceiverController.cs` for database operations.
- Introduced a private `_cnnStr` field in `EnvelopeReceiverController` to store the connection string.
- Updated the constructor to accept `IOptions<ConnectionString>` for dependency injection of the connection string.
- Added a SQL command block to handle document element additions using a stored procedure.
- Configured the `ConnectionString` class in `Program.cs` to bind the connection string from app settings.
- Created a new `ConnectionString` class to manage the connection string value.

EnvelopeGenerator.GeneratorAPI/Controllers/EnvelopeReceiverController.cs

@@ -7,9 +7,13 @@ using EnvelopeGenerator.Application.EnvelopeReceivers.Commands.Create;
 using EnvelopeGenerator.Application.EnvelopeReceivers.Queries.Read;
 using EnvelopeGenerator.Application.Envelopes.Queries.ReceiverName;
 using EnvelopeGenerator.Domain.Entities;
+using EnvelopeGenerator.GeneratorAPI.Models;
 using MediatR;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.Data.SqlClient;
+using Microsoft.Extensions.Options;
+using System.Data;
 using System.Threading.Channels;
 
 namespace EnvelopeGenerator.GeneratorAPI.Controllers;
@@ -39,6 +43,8 @@ public class EnvelopeReceiverController : ControllerBase
 
     private readonly IDocumentExecutor _documentExecutor;
 
+    private readonly string _cnnStr;
+
     /// <summary>
     /// Konstruktor für den EnvelopeReceiverController.
     /// </summary>
@@ -48,7 +54,7 @@ public class EnvelopeReceiverController : ControllerBase
     /// <param name="mapper"></param>
     /// <param name="envelopeExecutor"></param>
     /// <param name="erExecutor"></param>
-    public EnvelopeReceiverController(ILogger<EnvelopeReceiverController> logger, IEnvelopeReceiverService envelopeReceiverService, IMediator mediator, IMapper mapper, IEnvelopeExecutor envelopeExecutor, IEnvelopeReceiverExecutor erExecutor, IDocumentExecutor documentExecutor)
+    public EnvelopeReceiverController(ILogger<EnvelopeReceiverController> logger, IEnvelopeReceiverService envelopeReceiverService, IMediator mediator, IMapper mapper, IEnvelopeExecutor envelopeExecutor, IEnvelopeReceiverExecutor erExecutor, IDocumentExecutor documentExecutor, IOptions<ConnectionString> csOpt)
     {
         _logger = logger;
         _erService = envelopeReceiverService;
@@ -57,6 +63,7 @@ public class EnvelopeReceiverController : ControllerBase
         _envelopeExecutor = envelopeExecutor;
         _erExecutor = erExecutor;
         _documentExecutor = documentExecutor;
+        _cnnStr = csOpt.Value.Value;
     }
 
     /// <summary>
@@ -228,7 +235,45 @@ public class EnvelopeReceiverController : ControllerBase
 
             if(document is null)
                 return StatusCode(StatusCodes.Status500InternalServerError, "Document creation is failed.");
+            #endregion
 
+            #region Add document element
+            string sql = @"
+                DECLARE @OUT_SUCCESS bit;
+
+                EXEC [dbo].[PRSIG_API_ADD_DOC_RECEIVER_ELEM]
+                    @DOC_ID = @DOC_ID,
+                    @RECEIVER_ID = @RECEIVER_ID,
+                    @POSITION_X = @POSITION_X,
+                    @POSITION_Y = @POSITION_Y,
+                    @PAGE = @PAGE,
+                    @OUT_SUCCESS = @OUT_SUCCESS OUTPUT;
+
+                SELECT @OUT_SUCCESS as [@OUT_SUCCESS];";
+
+            foreach(var rcv in res.SentRecipients)
+                foreach(var sign in request.Receivers.Where(r => r.EmailAddress == rcv.EmailAddress).FirstOrDefault()?.Signatures ?? Array.Empty<Signature>())
+                {
+                    using (SqlConnection conn = new(_cnnStr))
+                    {
+                        conn.Open();
+
+                        using SqlCommand cmd = new SqlCommand(sql, conn);
+                        cmd.CommandType = CommandType.Text;
+
+                        cmd.Parameters.AddWithValue("@DOC_ID", document.Id);
+                        cmd.Parameters.AddWithValue("@RECEIVER_ID", rcv.Id);
+                        cmd.Parameters.AddWithValue("@POSITION_X", sign.X.ToString());
+                        cmd.Parameters.AddWithValue("@POSITION_Y", sign.Y.ToString());
+                        cmd.Parameters.AddWithValue("@PAGE", sign.Page.ToString());
+
+                        using SqlDataReader reader = cmd.ExecuteReader();
+                        if (reader.Read())
+                        {
+                            bool outSuccess = reader.GetBoolean(0);
+                        }
+                    }
+                }
             #endregion
 
             return Ok(res);