Initial commit

C#/WebApplication/Logic/CustomerLogic.cs

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+using System.Collections.Generic;
+using System.Linq;
+using WebApplication.Modules;
+using WebApplication.Repositorys.Interfaces;
+
+namespace WebApplication.Logic {
+    public interface ICustomerLogic {
+        ILogicResult<Customer> AddCustomer(CustomerEditor editor);
+        ILogicResult RemoveCustomer(string id, string session);
+        ILogicResult EditCustomer(string id, CustomerEditor editor, string session);
+        ILogicResult<Customer> GetCustomer(string id, string session);
+        ILogicResult<IEnumerable<Customer>> GetCustomers();
+        ILogicResult<Session> CreateCustomerSession(string customer);
+        ILogicResult DeleteCustomerSession(string customer, string session);
+        ILogicResult<Session> Login(CustomerLogin login);
+    }
+    
+    public class CustomerLogic : ICustomerLogic {
+        private readonly ICustomerRepository _customers;
+        private readonly ISessionRepository _sessions;
+
+        public CustomerLogic(ICustomerRepository customers, ISessionRepository sessions) {
+            _customers = customers;
+            _sessions = sessions;
+        }
+        
+        public ILogicResult<Customer> AddCustomer(CustomerEditor editor) {
+            return LogicResult<Customer>.Ok(_customers.AddCustomer(editor));
+        }
+
+        public ILogicResult RemoveCustomer(string id, string session) {
+            if (!ValidateSession(session, id)) return LogicResult.Forbidden();
+            _customers.RemoveCustomer(id);
+            return LogicResult.Ok();
+        }
+
+        public ILogicResult EditCustomer(string id, CustomerEditor editor, string session) {
+            if (!ValidateSession(session, id)) return LogicResult.Forbidden();
+            _customers.EditCustomer(id, editor);
+            return LogicResult.Ok();
+        }
+
+        public ILogicResult<Customer> GetCustomer(string id, string session) {
+            if (!ValidateSession(session, id)) return LogicResult<Customer>.Forbidden();
+            return LogicResult<Customer>.Ok(_customers.GetCustomer(id));
+        }
+
+        public ILogicResult<IEnumerable<Customer>> GetCustomers() {
+            return LogicResult<IEnumerable<Customer>>.Ok(_customers.GetCustomers());
+        }
+
+        public ILogicResult<Session> CreateCustomerSession(string customer) {
+            return LogicResult<Session>.Ok(_sessions.CreateSession(customer));
+        }
+
+        public ILogicResult DeleteCustomerSession(string customer, string session) {
+            if (!ValidateSession(session, customer)) return LogicResult.Forbidden();
+            _sessions.RemoveSession(_sessions.GetSession(session));
+            return LogicResult.Ok();
+        }
+
+        public ILogicResult<Session> Login(CustomerLogin login) {
+            var customer = _customers.GetCustomers().FirstOrDefault(c => c.Email == login.Email);
+            if (customer is null) return LogicResult<Session>.NotFound();
+            return !customer.Password.Equals(login.Password) ? LogicResult<Session>.Forbidden() : CreateCustomerSession(customer.Guid);
+        }
+
+        private bool ValidateSession(string session, string customerToAccess) {
+            return _sessions.ValidateSession(_sessions.GetSession(session), customerToAccess);
+        }
+    }
+}