feat(ModifyDocStatusCommandBase): create abstract class to handle common properties of commands

EnvelopeGenerator.Application/DocStatus/Commands/ModifyDocStatusCommandBase.cs

@@ -0,0 +1,52 @@
+using EnvelopeGenerator.Domain;
+
+namespace EnvelopeGenerator.Application.DocStatus.Commands;
+
+/// <summary>
+/// 
+/// </summary>
+public abstract record ModifyDocStatusCommandBase
+{
+    /// <summary>
+    /// Gets or sets the ID of the associated envelope.
+    /// </summary>
+    public int EnvelopeId { get; set; }
+
+    /// <summary>
+    /// Gets or sets the ID of the receiver associated with this status.
+    /// </summary>
+    public int ReceiverId { get; set; }
+
+    /// <summary>
+    /// Gets the current status code.
+    /// </summary>
+    public Constants.DocumentStatus Status => Value is null ? Constants.DocumentStatus.Created : Constants.DocumentStatus.Signed;
+
+    /// <summary>
+    /// Gets or sets the display value associated with the status.
+    /// </summary>
+    public string? Value { get; set; }
+
+    /// <summary>
+    /// Gets timestamp when this record was added.
+    /// </summary>
+    public DateTime StatusChangedWhen { get; } = DateTime.Now;
+
+    /// <summary>
+    /// Gets timestamp when this record was added.
+    /// </summary>
+    public abstract DateTime? ChangedWhen { get; }
+
+    /// <summary>
+    /// Maps the current command to a new instance of the specified type.
+    /// </summary>
+    /// <typeparam name="TDest"></typeparam>
+    /// <returns></returns>
+    public TDest To<TDest>() where TDest : ModifyDocStatusCommandBase, new()
+        => new()
+        {
+            EnvelopeId = EnvelopeId,
+            ReceiverId = ReceiverId,
+            Value = Value
+        };
+}