[PM-10563] Notification Center API (#4852)

* PM-10563: Notification Center API

* PM-10563: continuation token hack

* PM-10563: Resolving merge conflicts

* PM-10563: Unit Tests

* PM-10563: Paging simplification by page number and size in database

* PM-10563: Request validation

* PM-10563: Read, Deleted status filters change

* PM-10563: Plural name for tests

* PM-10563: Request validation to always for int type

* PM-10563: Continuation Token returns null on response when no more records available

* PM-10563: Integration tests for GET

* PM-10563: Mark notification read, deleted commands date typos fix

* PM-10563: Integration tests for PATCH read, deleted

* PM-10563: Request, Response models tests

* PM-10563: EditorConfig compliance

* PM-10563: Extracting to const

* PM-10563: Update db migration script date

* PM-10563: Update migration script date

src/Api/NotificationCenter/Models/Request/NotificationFilterRequestModel.cs

@@ -0,0 +1,41 @@
+#nullable enable
+using System.ComponentModel.DataAnnotations;
+
+namespace Bit.Api.NotificationCenter.Models.Request;
+
+public class NotificationFilterRequestModel : IValidatableObject
+{
+    /// <summary>
+    /// Filters notifications by read status. When not set, includes notifications without a status.
+    /// </summary>
+    public bool? ReadStatusFilter { get; set; }
+
+    /// <summary>
+    /// Filters notifications by deleted status. When not set, includes notifications without a status.
+    /// </summary>
+    public bool? DeletedStatusFilter { get; set; }
+
+    /// <summary>
+    /// A cursor for use in pagination.
+    /// </summary>
+    [StringLength(9)]
+    public string? ContinuationToken { get; set; }
+
+    /// <summary>
+    /// The number of items to return in a single page.
+    /// Default 10. Minimum 10, maximum 1000.
+    /// </summary>
+    [Range(10, 1000)]
+    public int PageSize { get; set; } = 10;
+
+    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
+    {
+        if (!string.IsNullOrWhiteSpace(ContinuationToken) &&
+            (!int.TryParse(ContinuationToken, out var pageNumber) || pageNumber <= 0))
+        {
+            yield return new ValidationResult(
+                "Continuation token must be a positive, non zero integer.",
+                [nameof(ContinuationToken)]);
+        }
+    }
+}

src/Api/NotificationCenter/Models/Response/NotificationResponseModel.cs

@@ -0,0 +1,46 @@
+#nullable enable
+using Bit.Core.Models.Api;
+using Bit.Core.NotificationCenter.Enums;
+using Bit.Core.NotificationCenter.Models.Data;
+
+namespace Bit.Api.NotificationCenter.Models.Response;
+
+public class NotificationResponseModel : ResponseModel
+{
+    private const string _objectName = "notification";
+
+    public NotificationResponseModel(NotificationStatusDetails notificationStatusDetails, string obj = _objectName)
+        : base(obj)
+    {
+        if (notificationStatusDetails == null)
+        {
+            throw new ArgumentNullException(nameof(notificationStatusDetails));
+        }
+
+        Id = notificationStatusDetails.Id;
+        Priority = notificationStatusDetails.Priority;
+        Title = notificationStatusDetails.Title;
+        Body = notificationStatusDetails.Body;
+        Date = notificationStatusDetails.RevisionDate;
+        ReadDate = notificationStatusDetails.ReadDate;
+        DeletedDate = notificationStatusDetails.DeletedDate;
+    }
+
+    public NotificationResponseModel() : base(_objectName)
+    {
+    }
+
+    public Guid Id { get; set; }
+
+    public Priority Priority { get; set; }
+
+    public string? Title { get; set; }
+
+    public string? Body { get; set; }
+
+    public DateTime Date { get; set; }
+
+    public DateTime? ReadDate { get; set; }
+
+    public DateTime? DeletedDate { get; set; }
+}