Users page and users service

FoodsharingSiegen.Server/Data/Service/ServiceBase.cs

@@ -0,0 +1,21 @@
+namespace FoodsharingSiegen.Server.Data.Service
+{
+    public class ServiceBase
+    {
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Database Context </summary>
+        ///
+        /// <value> The context. </value>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        protected FsContext Context { get; }
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Specialised constructor for use only by derived class. </summary>
+        ///
+        /// <remarks>   A Beging, 20.10.2021. </remarks>
+        ///
+        /// <param name="context">  The context. </param>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        protected ServiceBase(FsContext context) => Context = context;
+    }
+}

FoodsharingSiegen.Server/Data/Service/UserService.cs

@@ -0,0 +1,73 @@
+using FoodsharingSiegen.Contracts;
+using FoodsharingSiegen.Contracts.Entity;
+using Microsoft.EntityFrameworkCore;
+
+namespace FoodsharingSiegen.Server.Data.Service
+{
+    public class UserService : ServiceBase
+    {
+        public UserService(FsContext context) : base(context)
+        {
+            
+        }
+
+        public async Task<OperationResult<User>> AddUserAsync(User user)
+        {
+            try
+            {
+                if (await Context.Users.AnyAsync(x => x.Mail.ToLower().Equals(user.Mail.ToLower())))
+                    return new OperationResult<User>(new Exception("Diese E-Mail Adresse wird bereits verwendet"));
+            
+                user.Created = DateTime.UtcNow;
+            
+                await Context.Users.AddAsync(user);
+            
+                var saveResult = await Context.SaveChangesAsync();
+                if (saveResult == 0) return new OperationResult<User>(new Exception("Fehler bei der Registrierung"));
+            
+                return new OperationResult<User>(user);
+            }
+            catch (Exception e)
+            {
+                return new OperationResult<User>(e);
+            }
+            
+        }
+        
+        public async Task<OperationResult> Update(User user)
+        {
+            try
+            {
+                Context.Users.Update(user);
+                var saveR = await Context.SaveChangesAsync();
+            
+                if(saveR < 1) return new OperationResult(new Exception("Fehler beim speichern"));
+                return new OperationResult();
+            }
+            catch (Exception e)
+            {
+                return new OperationResult(e);
+            }
+        }
+        
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Gets users asynchronous. </summary>
+        ///
+        /// <remarks>   A Beging, 20.10.2021. </remarks>
+        ///
+        /// <returns>   An asynchronous result that yields the users. </returns>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        public async Task<OperationResult<List<User>>> GetUsersAsync()
+        {
+            try
+            {
+                var users = await Context.Users.ToListAsync();
+                return new OperationResult<List<User>>(users);
+            }
+            catch (Exception e)
+            {
+                return new OperationResult<List<User>>(e);
+            }
+        }
+    }
+}