Initial commit.

- Created and set up main projects
- Created classes for Domain

PhonebookService.Domain/Repositories/IPhonebookRepository.cs

@@ -0,0 +1,44 @@
+using PhonebookService.Domain.Models;
+using PhonebookService.Domain.Queries;
+
+namespace PhonebookService.Domain.Repositories;
+
+/// <summary>
+/// Interface for the phonebook repository
+/// </summary>
+public interface IPhonebookRepository
+{
+	/// <summary>
+	/// Get items list based on the provided query
+	/// </summary>
+	/// <param name="query">Parameters for filtering and pagination</param>
+	/// <returns>Collection of <see cref="Models.PhonebookRecord"/></returns>
+	Task<ICollection<PhonebookRecord>> GetItemsAsync(PhonebookFilterQuery query);
+
+	/// <summary>
+	/// Get one item by its ID
+	/// </summary>
+	/// <param name="id">Id of the item</param>
+	/// <returns>Matched <see cref="Models.PhonebookRecord"/> or null if none found</returns>
+	Task<PhonebookRecord?> GetItemByIdAsync(int id);
+
+	/// <summary>
+	/// Add new item to a database
+	/// </summary>
+	/// <param name="item"><see cref="Models.PhonebookRecord"/> entity</param>
+	/// <returns>The result <see cref="Models.PhonebookRecord"/> with assigned Id</returns>
+	Task<PhonebookRecord> CreateItemAsync(PhonebookRecord item);
+
+	/// <summary>
+	/// Updates provided item in a database
+	/// </summary>
+	/// <param name="item">item to update. Id is required</param>
+	/// <returns>The result <see cref="Models.PhonebookRecord"/> with assigned Id</returns>
+	Task<PhonebookRecord> UpdateItemAsync(PhonebookRecord item);
+
+	/// <summary>
+	/// Deletes provided item from a database
+	/// </summary>
+	/// <param name="item"><see cref="Models.PhonebookRecord"/> to delete</param>
+	Task DeleteItemAsync(PhonebookRecord item);
+}