feat: DELETE-Anforderungsmethode zu API-Diensten im Angular-Frontend hinzufügen

- Die `Delete`-Methode im Controller aktualisiert, um das Löschen nach `id`, `emailAddress` oder `signature` zu unterstützen.
- `DeleteByAsync`-Methode im Service hinzugefügt, um Datensätze basierend auf `emailAddress` und `signature` zu löschen.
- Fehlerbehandlung mit Protokollierung für fehlgeschlagene Löschversuche verbessert.

EnvelopeGenerator.Application/Contracts/IEnvelopeHistoryService.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Abstractions.Application;
 using DigitalData.Core.DTO;
-using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Application.DTOs.EnvelopeHistory;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using EnvelopeGenerator.Domain.Entities;
 using EnvelopeGenerator.Infrastructure.Contracts;
 using static EnvelopeGenerator.Common.Constants;
@@ -22,7 +22,7 @@ namespace EnvelopeGenerator.Application.Contracts
 
         Task<IEnumerable<EnvelopeHistoryDto>> ReadRejectedAsync(int envelopeId, string? userReference = null);
 
-        Task<IEnumerable<ReceiverDto>> ReadRejectingReceivers(int envelopeId);
+        Task<IEnumerable<ReceiverReadDto>> ReadRejectingReceivers(int envelopeId);
 
 		Task<DataResult<long>> RecordAsync(int envelopeId, string userReference, EnvelopeStatus status, string? comment = null);
     }

EnvelopeGenerator.Application/Contracts/IReceiverService.cs

@@ -1,10 +1,14 @@
 using DigitalData.Core.Abstractions.Application;
-using EnvelopeGenerator.Application.DTOs;
+using DigitalData.Core.DTO;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using EnvelopeGenerator.Domain.Entities;
 
 namespace EnvelopeGenerator.Application.Contracts
 {
-    public interface IReceiverService : IBasicCRUDService<ReceiverDto, Receiver, int>
+    public interface IReceiverService : ICRUDService<ReceiverCreateDto, ReceiverReadDto, ReceiverUpdateDto, Receiver, int>
     {
+        public Task<DataResult<ReceiverReadDto>> ReadByAsync(string? emailAddress = null, string? signature = null);
+
+        public Task<Result> DeleteByAsync(string? emailAddress = null, string? signature = null);
     }
 }

EnvelopeGenerator.Application/DTOs/EnvelopeHistory/EnvelopeHistoryDto.cs

@@ -1,5 +1,6 @@
 using DigitalData.Core.DTO;
 using DigitalData.UserManager.Application.DTOs.User;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using static EnvelopeGenerator.Common.Constants;
 
 namespace EnvelopeGenerator.Application.DTOs.EnvelopeHistory
@@ -12,7 +13,7 @@ namespace EnvelopeGenerator.Application.DTOs.EnvelopeHistory
         DateTime AddedWhen,
         DateTime? ActionDate,
         UserCreateDto? Sender,
-        ReceiverDto? Receiver,
+        ReceiverReadDto? Receiver,
         ReferenceType ReferenceType,
         string? Comment = null) : BaseDTO<long>(Id);
 }

EnvelopeGenerator.Application/DTOs/EnvelopeReceiverDto.cs

@@ -1,4 +1,5 @@
 using DigitalData.EmailProfilerDispatcher.Abstraction.Attributes;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 
 namespace EnvelopeGenerator.Application.DTOs
 {
@@ -25,6 +26,6 @@ namespace EnvelopeGenerator.Application.DTOs
 				
 		public EnvelopeDto? Envelope { get; set; }
 
-		public ReceiverDto? Receiver { get; set; }
+		public ReceiverReadDto? Receiver { get; set; }
 	}
 }

EnvelopeGenerator.Application/DTOs/Receiver/ReceiverCreateDto.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace EnvelopeGenerator.Application.DTOs.Receiver
+{
+    public record ReceiverCreateDto([EmailAddress] string EmailAddress)
+    {
+        public string Signature => sha256HexOfMail.Value;
+
+        private readonly Lazy<string> sha256HexOfMail = new(() =>
+        {
+            var bytes_arr = Encoding.UTF8.GetBytes(EmailAddress.ToUpper());
+            var hash_arr = SHA256.HashData(bytes_arr);
+            var hexa_str = BitConverter.ToString(hash_arr);
+            return hexa_str.Replace("-", string.Empty);
+        });
+
+        public DateTime AddedWhen { get; } = DateTime.Now;
+    };
+}

EnvelopeGenerator.Application/DTOs/Receiver/ReceiverReadDto.cs

@@ -1,8 +1,8 @@
 using DigitalData.Core.DTO;
 
-namespace EnvelopeGenerator.Application.DTOs
+namespace EnvelopeGenerator.Application.DTOs.Receiver
 {
-    public record ReceiverDto(
+    public record ReceiverReadDto(
         int Id,
         string EmailAddress,
         string Signature,

EnvelopeGenerator.Application/DTOs/Receiver/ReceiverUpdateDto.cs

@@ -0,0 +1,4 @@
+namespace EnvelopeGenerator.Application.DTOs.Receiver
+{
+    public record ReceiverUpdateDto();
+}

EnvelopeGenerator.Application/MappingProfiles/BasicDtoMappingProfile.cs

@@ -1,6 +1,7 @@
 using AutoMapper;
 using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Application.DTOs.EnvelopeHistory;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using EnvelopeGenerator.Domain.Entities;
 
 namespace EnvelopeGenerator.Application.MappingProfiles
@@ -21,7 +22,9 @@ namespace EnvelopeGenerator.Application.MappingProfiles
             CreateMap<EnvelopeHistory, EnvelopeHistoryCreateDto>();
             CreateMap<EnvelopeReceiver, EnvelopeReceiverDto>();
             CreateMap<EnvelopeType, EnvelopeTypeDto>();
-            CreateMap<Receiver, ReceiverDto>();
+            CreateMap<Receiver, ReceiverReadDto>();
+            CreateMap<Receiver, ReceiverCreateDto>();
+            CreateMap<Receiver, ReceiverUpdateDto>();
             CreateMap<UserReceiver, UserReceiverDto>();
 
             // DTO to Entity mappings
@@ -36,7 +39,9 @@ namespace EnvelopeGenerator.Application.MappingProfiles
             CreateMap<EnvelopeHistoryCreateDto, EnvelopeHistory>();
             CreateMap<EnvelopeReceiverDto, EnvelopeReceiver>();
             CreateMap<EnvelopeTypeDto, EnvelopeType>();
-            CreateMap<ReceiverDto, Receiver>();
+            CreateMap<ReceiverReadDto, Receiver>();
+            CreateMap<ReceiverCreateDto, Receiver>();
+            CreateMap<ReceiverUpdateDto, Receiver>();
             CreateMap<UserReceiverDto, UserReceiver>();
         }
     }

EnvelopeGenerator.Application/Services/EnvelopeHistoryService.cs

@@ -8,7 +8,7 @@ using static EnvelopeGenerator.Common.Constants;
 using EnvelopeGenerator.Application.Resources;
 using DigitalData.Core.DTO;
 using EnvelopeGenerator.Application.DTOs.EnvelopeHistory;
-using EnvelopeGenerator.Application.DTOs;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 
 namespace EnvelopeGenerator.Application.Services
 {
@@ -67,11 +67,11 @@ namespace EnvelopeGenerator.Application.Services
             await ReadAsync(envelopeId: envelopeId, userReference: userReference, status: (int)EnvelopeStatus.DocumentRejected, withReceiver:true);
 
 		//TODO: use IQueryable in repository to incerease the performance
-		public async Task<IEnumerable<ReceiverDto>> ReadRejectingReceivers(int envelopeId)
+		public async Task<IEnumerable<ReceiverReadDto>> ReadRejectingReceivers(int envelopeId)
 		{
 			var envelopes = await ReadRejectedAsync(envelopeId);
             return envelopes is null
-                ? Enumerable.Empty<ReceiverDto>()
+                ? Enumerable.Empty<ReceiverReadDto>()
                 : envelopes
                     .Where(eh => eh?.Receiver != null)
                     .Select(eh => eh.Receiver!);

EnvelopeGenerator.Application/Services/ReceiverService.cs

@@ -2,19 +2,39 @@
 using DigitalData.Core.Application;
 using Microsoft.Extensions.Localization;
 using EnvelopeGenerator.Application.Contracts;
-using EnvelopeGenerator.Application.DTOs;
 using EnvelopeGenerator.Domain.Entities;
 using EnvelopeGenerator.Infrastructure.Contracts;
 using EnvelopeGenerator.Application.Resources;
-using Microsoft.AspNetCore.Mvc;
+using EnvelopeGenerator.Application.DTOs.Receiver;
+using DigitalData.Core.DTO;
 
 namespace EnvelopeGenerator.Application.Services
 {
-    public class ReceiverService : BasicCRUDService<IReceiverRepository, ReceiverDto, Receiver, int>, IReceiverService
+    public class ReceiverService : CRUDService<IReceiverRepository, ReceiverCreateDto, ReceiverReadDto, ReceiverUpdateDto, Receiver, int>, IReceiverService
     {
         public ReceiverService(IReceiverRepository repository, IStringLocalizer<Resource> localizer, IMapper mapper)
             : base(repository, mapper)
         {
         }
+
+        public async Task<DataResult<ReceiverReadDto>> ReadByAsync(string? emailAddress = null, string? signature = null)
+        {
+            var rcv = await _repository.ReadByAsync(emailAddress: emailAddress, signature: signature);
+
+            if (rcv is null)
+                return Result.Fail<ReceiverReadDto>();
+
+            return Result.Success(_mapper.MapOrThrow<ReceiverReadDto>(rcv));
+        }
+
+        public async Task<Result> DeleteByAsync(string? emailAddress = null, string? signature = null)
+        {
+            var rcv = await _repository.ReadByAsync(emailAddress: emailAddress, signature: signature);
+
+            if (rcv is null)
+                return Result.Fail();
+
+            return await _repository.DeleteAsync(rcv) ? Result.Success() : Result.Fail();
+        }
     }
 }

EnvelopeGenerator.Domain/Entities/Receiver.cs

@@ -10,14 +10,14 @@ namespace EnvelopeGenerator.Domain.Entities
         [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
         [Column("GUID")]
         public int Id { get; set; }
-
-        [Required]
+        
+        [Required, EmailAddress]
         [Column("EMAIL_ADDRESS", TypeName = "nvarchar(128)")]
-        public string EmailAddress { get; set; }
+        public required string EmailAddress { get; set; }
 
         [Required]
         [Column("SIGNATURE", TypeName = "nvarchar(64)")]
-        public string Signature { get; set; }
+        public required string Signature { get; set; }
 
         [Required]
         [Column("ADDED_WHEN", TypeName = "datetime")]

EnvelopeGenerator.GeneratorAPI/ClientApp/envelope-generator-ui/src/app/components/envelope-table/envelope-table.component.ts

@@ -1,10 +1,11 @@
-import { Component, ViewChild } from '@angular/core';
+import { Component, Input, ViewChild } from '@angular/core';
 import { EnvelopeReceiverService } from '../../services/envelope-receiver.service';
 import { MatTable, MatTableModule } from '@angular/material/table';
 import { CommonModule } from '@angular/common'
-import {MatIconModule} from '@angular/material/icon';
-import {MatButtonModule} from '@angular/material/button';
-import {animate, state, style, transition, trigger} from '@angular/animations';
+import { MatIconModule } from '@angular/material/icon';
+import { MatButtonModule } from '@angular/material/button';
+import { animate, state, style, transition, trigger } from '@angular/animations';
+import { Status } from '../../enums/envelope-const'
 
 @Component({
   selector: 'app-envelope-table',
@@ -13,8 +14,8 @@ import {animate, state, style, transition, trigger} from '@angular/animations';
   templateUrl: './envelope-table.component.html',
   animations: [
     trigger('detailExpand', [
-      state('collapsed,void', style({height: '0px', minHeight: '0'})),
-      state('expanded', style({height: '*'})),
+      state('collapsed,void', style({ height: '0px', minHeight: '0' })),
+      state('expanded', style({ height: '*' })),
       transition('expanded <=> collapsed', animate('225ms cubic-bezier(0.4, 0.0, 0.2, 1)')),
     ]),
   ],
@@ -22,12 +23,13 @@ import {animate, state, style, transition, trigger} from '@angular/animations';
 })
 export class EnvelopeTableComponent {
 
-  data: Array<any> = []
+  @Input() data: Array<any> = []
 
-  public displayedColumns: string[] = ['title', 'status', 'type', 'privateMessage', 'addedWhen'];
-  columnsToDisplayWithExpand = [...this.displayedColumns, 'expand'];
-  
-  schema: any = {
+  @Input() options?: { min_status?: number; max_status?: number; ignore_status?: number[] }
+
+  @Input() displayedColumns: string[] = ['title', 'status', 'type', 'privateMessage', 'addedWhen'];
+
+  @Input() schema: Record<string, { header: string; field: (element: any) => any; }> = {
     'title': {
       header: 'Title',
       field: (element: any) => element.envelope.title
@@ -50,6 +52,8 @@ export class EnvelopeTableComponent {
     },
   }
 
+  columnsToDisplayWithExpand = [...this.displayedColumns, 'expand'];
+
   expandedElement: any | null;
 
   @ViewChild(MatTable) table!: MatTable<any>;
@@ -57,7 +61,8 @@ export class EnvelopeTableComponent {
   constructor(private erService: EnvelopeReceiverService) { }
 
   async ngOnInit() {
-    this.data = await this.erService.getEnvelopeReceiver();
+    if (this.data.length === 0)
+      this.data = await this.erService.getEnvelopeReceiverAsync(this.options);
   }
 
   public updateTable() {
@@ -66,5 +71,5 @@ export class EnvelopeTableComponent {
 
   isExpandedRow(index: number, row: any): boolean {
     return (row?.envelopeId === this.expandedElement?.envelopeId) && (row?.receiverId === this.expandedElement?.receiverId);
-  }  
+  }
 }

EnvelopeGenerator.GeneratorAPI/ClientApp/envelope-generator-ui/src/app/enums/envelope-const.ts

@@ -1,4 +1,4 @@
-export enum Status {
+enum Status {
     Invalid = 0,
     EnvelopeCreated = 1001,
     EnvelopeSaved = 1002,
@@ -20,4 +20,6 @@ export enum Status {
     MessageConfirmationSent = 3003,
     MessageDeletionSent = 3004,
     MessageCompletionSent = 3005
-}
+}
+
+export { Status }

EnvelopeGenerator.GeneratorAPI/ClientApp/envelope-generator-ui/src/app/pages/envelope-creation/envelope-creation.component.html

@@ -8,7 +8,7 @@
             </mat-form-field>
             <mat-form-field class="ms-5">
                 <mat-label>Vertragstyp</mat-label>
-                <mat-select [(value)]="selectedType" [formControl]="typeControl" formControlName="firstCtrl" required>
+                <mat-select [(value)]="selectedType" [formControl]="typeControl" required>
                     @for (type of types; track type) {
                     <mat-option [value]="type.value">{{type.viewValue}}</mat-option>
                     }

EnvelopeGenerator.GeneratorAPI/ClientApp/envelope-generator-ui/src/app/pages/envelope-creation/envelope-creation.component.ts

@@ -5,6 +5,7 @@ import { MatFormFieldModule } from '@angular/material/form-field';
 import { MatStepperModule } from '@angular/material/stepper';
 import { MatButtonModule } from '@angular/material/button';
 import { MatSelectModule } from '@angular/material/select';
+import { ReceiverService } from '../../services/receiver.service';
 
 @Component({
   selector: 'app-envelope-creation',
@@ -23,6 +24,9 @@ import { MatSelectModule } from '@angular/material/select';
 })
 export class EnvelopeCreationComponent {
 
+  constructor(private receiverService: ReceiverService) {
+  }
+
   ngOnInit() {
     this.selectedType = this.types[0].value;
   }
@@ -39,8 +43,8 @@ export class EnvelopeCreationComponent {
 
   selectedType: string = "Mietvertrag"
   types: any[] = [
-    {value: 0, viewValue: 'Mietvertrag'},
-    {value: 1, viewValue: 'Kaufvertrag'}
+    { value: 0, viewValue: 'Mietvertrag' },
+    { value: 1, viewValue: 'Kaufvertrag' }
   ];
   typeControl = new FormControl('Mietvertrag', [Validators.required]);
 }

EnvelopeGenerator.GeneratorAPI/ClientApp/envelope-generator-ui/src/app/pages/envelope/envelope.component.html

@@ -1,10 +1,10 @@
 <div id="table">
     <mat-tab-group>
         <mat-tab label="Offene Umschläge">
-            <app-envelope-table></app-envelope-table>
+            <app-envelope-table [options]="{max_status: Status.EnvelopePartlySigned}"></app-envelope-table>
         </mat-tab>
         <mat-tab label="Abgeschlossene Umschläge">
-            <app-envelope-table></app-envelope-table>
+            <app-envelope-table [options]="{min_status: Status.EnvelopeCompletelySigned, ignore_status: [Status.EnvelopeDeleted]}"></app-envelope-table>
         </mat-tab>
     </mat-tab-group>
 </div>

EnvelopeGenerator.GeneratorAPI/ClientApp/envelope-generator-ui/src/app/pages/envelope/envelope.component.ts

@@ -2,8 +2,7 @@ import { Component } from '@angular/core';
 import { EnvelopeTableComponent } from "../../components/envelope-table/envelope-table.component";
 import { MatTabsModule } from '@angular/material/tabs';
 import { LocalizationService } from '../../services/localization.service';
-import { firstValueFrom } from 'rxjs/internal/firstValueFrom';
-
+import { Status } from '../../enums/envelope-const'
 @Component({
     selector: 'app-envelope',
     standalone: true,
@@ -13,6 +12,8 @@ import { firstValueFrom } from 'rxjs/internal/firstValueFrom';
 })
 export class EnvelopeComponent {
 
+    readonly Status = Status;
+
     private localizer: any = {};
 
     constructor(private localizationService: LocalizationService) {

EnvelopeGenerator.GeneratorAPI/ClientApp/envelope-generator-ui/src/app/services/envelope-receiver.service.ts

@@ -1,5 +1,5 @@
 import { Injectable, inject } from '@angular/core';
-import { HttpClient } from '@angular/common/http';
+import { HttpClient, HttpParams } from '@angular/common/http';
 import { Observable, firstValueFrom } from 'rxjs';
 import { API_URL } from '../tokens/index';
 
@@ -7,14 +7,28 @@ import { API_URL } from '../tokens/index';
   providedIn: 'root'
 })
 export class EnvelopeReceiverService {
-  private url: string;
+  protected url: string;
 
   constructor(private http: HttpClient) {
     const api_url = inject(API_URL);
     this.url = `${api_url}/envelopereceiver`;
   }
 
-  getEnvelopeReceiver(): Promise<any> {
-    return firstValueFrom(this.http.get<any>(this.url));
+  getEnvelopeReceiver(options?: { min_status?: number; max_status?: number; ignore_status?: number[] }): Observable<any> {
+    let params = new HttpParams();
+    if (options) {
+      if (options.min_status)
+        params = params.set('min_status', options.min_status.toString());
+      if (options.max_status)
+        params = params.set('max_status', options.max_status.toString());
+      if (options.ignore_status)
+        params = params.set('ignore_status', options.ignore_status.join(','));
+    }
+    return this.http.get<any>(this.url, { params });
+  }
+
+
+  getEnvelopeReceiverAsync(options?: { min_status?: number; max_status?: number; ignore_status?: number[] }): Promise<any> {
+    return firstValueFrom(this.getEnvelopeReceiver(options));
   }
 }

EnvelopeGenerator.GeneratorAPI/ClientApp/envelope-generator-ui/src/app/services/receiver.service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { ReceiverService } from './receiver.service';
+
+describe('ReceiverService', () => {
+  let service: ReceiverService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(ReceiverService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

EnvelopeGenerator.GeneratorAPI/ClientApp/envelope-generator-ui/src/app/services/receiver.service.ts

@@ -0,0 +1,58 @@
+import { HttpClient, HttpParams } from '@angular/common/http';
+import { Injectable, inject } from '@angular/core';
+import { API_URL } from '../tokens';
+import { Observable, firstValueFrom } from 'rxjs';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ReceiverService {
+  protected url: string;
+
+  constructor(private http: HttpClient) {
+    const api_url = inject(API_URL);
+    this.url = `${api_url}/receiver`;
+  }
+
+  public getReceiver(options?: { emailAdress?: string; signature?: string; }): Observable<any> {
+    let params = new HttpParams();
+
+    if (options) {
+      if (options.emailAdress)
+        params = params.set('emailAdress', options?.emailAdress);
+      if (options.signature)
+        params = params.set('signature', options?.signature);
+    }
+
+    return this.http.get<any>(this.url, { params });
+  }
+
+  public async getReceiverAsync(options?: { emailAdress?: string; signature?: string; }): Promise<any> {
+    return await firstValueFrom(this.getReceiver(options));
+  }
+
+  public createReceiver(emailAddress: string): Observable<any> {
+    return this.http.post<any>(this.url, { emailAddress: emailAddress });
+  }
+
+  public async createReceiverAsync(emailAddress: string): Promise<any> {
+    return await firstValueFrom(this.createReceiver(emailAddress));
+  }
+
+  public deleteReceiver(options: { id: number, emailAdress?: string; signature?: string; }): Observable<any> {
+    let params = new HttpParams();
+
+    if (options.emailAdress)
+      params = params.set('emailAdress', options?.emailAdress);
+    if (options.signature)
+      params = params.set('signature', options?.signature);
+    if (options.id)
+      params = params.set('id', options?.id.toString());
+
+    return this.http.get<any>(this.url, { params });
+  }
+
+  public async deleteReceiverAsync(options: { id: number, emailAdress?: string; signature?: string; }): Promise<any> {
+    return await firstValueFrom(this.deleteReceiver(options));
+  }
+}

EnvelopeGenerator.GeneratorAPI/Controllers/ReceiverController.cs

@@ -0,0 +1,91 @@
+using DigitalData.Core.API;
+using DigitalData.Core.DTO;
+using EnvelopeGenerator.Application.Contracts;
+using EnvelopeGenerator.Application.DTOs.Receiver;
+using EnvelopeGenerator.Domain.Entities;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace EnvelopeGenerator.GeneratorAPI.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    [Authorize]
+    public class ReceiverController : CRUDControllerBaseWithErrorHandling<IReceiverService, ReceiverCreateDto, ReceiverReadDto, ReceiverUpdateDto, Receiver, int>
+    {
+        public ReceiverController(ILogger<ReceiverController> logger, IReceiverService service) : base(logger, service)
+        {
+        }
+
+
+
+        [HttpGet]
+        public async Task<IActionResult> Get([FromQuery] string? emailAddress = null, [FromQuery] string? signature = null)
+        {
+            if (emailAddress is null && signature is null)
+                return await base.GetAll();
+
+            try
+            {
+                return await _service.ReadByAsync(emailAddress: emailAddress, signature: signature).ThenAsync(
+                        Success: Ok,
+                        Fail: IActionResult (msg, ntc) =>
+                        {
+                            _logger.LogNotice(ntc);
+                            return StatusCode(StatusCodes.Status500InternalServerError);
+                        });
+            }
+            catch(Exception ex)
+            {
+                _logger.LogError(ex, "{Message}", ex.Message);
+                return StatusCode(StatusCodes.Status500InternalServerError);
+            }
+        }
+
+        [HttpPost]
+        public async override Task<IActionResult> Create(ReceiverCreateDto createDto)
+        {
+            if (!ModelState.IsValid)
+                return BadRequest(ModelState);
+
+            return await base.Create(createDto);
+        }
+
+        [HttpDelete]
+        public async Task<IActionResult> Delete([FromQuery] int? id = null, [FromQuery]string? emailAddress = null, [FromQuery] string? signature = null)
+        {
+            if(id is int id_int)
+                return await base.Delete(id_int);
+
+            try
+            {
+                if (emailAddress is not null || signature is not null)
+                    return await _service.DeleteByAsync(emailAddress: emailAddress, signature: signature).ThenAsync(
+                        Success: Ok,
+                        Fail: IActionResult (msg, ntc) =>
+                        {
+                            _logger.LogNotice(ntc);
+                            return StatusCode(StatusCodes.Status500InternalServerError);
+                        });
+            }
+            catch(Exception ex)
+            {
+                _logger.LogError(ex, "{Message}", ex.Message);
+                return StatusCode(500);
+            }
+
+            return BadRequest();
+        }
+
+        #region REMOVED ENDPOINTS
+        [NonAction]
+        public override Task<IActionResult> GetAll() => base.GetAll();
+
+        [NonAction]
+        public override Task<IActionResult> Delete([FromRoute] int id) => base.Delete(id);
+
+        [NonAction]
+        public override Task<IActionResult> Update(ReceiverUpdateDto updateDto) => base.Update(updateDto);
+        #endregion
+    }
+}

EnvelopeGenerator.Infrastructure/Contracts/IReceiverRepository.cs

@@ -5,5 +5,6 @@ namespace EnvelopeGenerator.Infrastructure.Contracts
 {
     public interface IReceiverRepository : ICRUDRepository<Receiver, int>
     {
+        Task<Receiver?> ReadByAsync(string? emailAddress = null, string? signature = null);
     }
 }

EnvelopeGenerator.Infrastructure/Repositories/ReceiverRepository.cs

@@ -1,7 +1,7 @@
 using DigitalData.Core.Infrastructure;
-using DigitalData.UserManager.Infrastructure.Repositories;
 using EnvelopeGenerator.Domain.Entities;
 using EnvelopeGenerator.Infrastructure.Contracts;
+using Microsoft.EntityFrameworkCore;
 
 namespace EnvelopeGenerator.Infrastructure.Repositories
 {
@@ -10,5 +10,20 @@ namespace EnvelopeGenerator.Infrastructure.Repositories
         public ReceiverRepository(EGDbContext dbContext) : base(dbContext)
         {
         }
+
+        protected IQueryable<Receiver> ReadBy(string? emailAddress = null, string? signature = null)
+        {
+            IQueryable<Receiver> query = _dbSet.AsNoTracking();
+
+            if(emailAddress is not null)
+                query = query.Where(r => r.EmailAddress == emailAddress);
+
+            if(signature is not null)
+                query = query.Where(r => r.Signature == signature);
+
+            return query;
+        }
+
+        public async Task<Receiver?> ReadByAsync(string? emailAddress = null, string? signature = null) => await ReadBy(emailAddress, signature).FirstOrDefaultAsync();
     }
 }

EnvelopeGenerator.Web/Controllers/Test/TestReceiverController.cs

@@ -1,10 +1,10 @@
 using EnvelopeGenerator.Application.Contracts;
-using EnvelopeGenerator.Application.DTOs;
+using EnvelopeGenerator.Application.DTOs.Receiver;
 using EnvelopeGenerator.Domain.Entities;
 
 namespace EnvelopeGenerator.Web.Controllers.Test
 {
-    public class TestReceiverController : TestControllerBase<IReceiverService, ReceiverDto, Receiver, int>
+    public class TestReceiverController : TestControllerBase<IReceiverService, ReceiverReadDto, Receiver, int>
     {
         public TestReceiverController(ILogger<TestReceiverController> logger, IReceiverService service) : base(logger, service)
         {