reduced memory footprint by not loading all mails

Author: Lyra1337

Services/MailRepository.cs

@@ -12,13 +12,20 @@ namespace Lyralabs.TempMailServer
 {
     public class MailRepository(IDbContextFactory<DatabaseContext> databaseContextFactory)
     {
-        public async Task<List<MailModel>> GetMails(int mailBoxId)
+        public async Task<List<MailModel>> GetMails(int mailBoxId, int? limit = null)
         {
             using var context = databaseContextFactory.CreateDbContext();
 
-            var mails = await context.Mails
+            IQueryable<MailModel> query = context.Mails
                 .Where(x => x.MailboxId == mailBoxId)
-                .ToListAsync();
+                .OrderByDescending(x => x.ReceivedDate);
+
+            if (limit != null)
+            {
+                query = query.Take(limit.Value);
+            }
+
+            var mails = await query.ToListAsync();
 
             return mails;
         }
@@ -69,9 +76,12 @@ public async Task<MailboxModel> GetMailbox(string address, bool loadMails)
 
             var mailbox = await query.SingleAsync(x => x.Address == address);
 
-            mailbox.Mails = mailbox.Mails
-                .OrderByDescending(x => x.ReceivedDate)
-                .ToList();
+            if (loadMails == true)
+            {
+                mailbox.Mails = mailbox.Mails
+                    .OrderByDescending(x => x.ReceivedDate)
+                    .ToList();
+            }
 
             return mailbox;
         }

Services/MailboxService.cs

@@ -41,27 +41,21 @@ public async Task<List<MailPreviewDto>> GetDecryptedMailsAsync(string address, s
                 throw new ArgumentException($"'{nameof(address)}' cannot be null or whitespace.", nameof(address));
             }
 
-            var mailbox = await this.mailRepository.GetMailbox(address, loadMails: true);
+            var mailbox = await this.mailRepository.GetMailbox(address, loadMails: false);
 
             if (mailbox is null)
             {
                 return [];
-            }
-
-            var query = mailbox.Mails
-                .OrderByDescending(x => x.ReceivedDate)
+            } 
+            
+            var mails = await this.mailRepository.GetMails(mailbox.Id, limit: 200);
+            return mails
                 .Select(x =>
                 {
                     var mail = this.emailCryptoService.Decrypt(x, privateKey);
                     return this.ConvertToPreview(mail);
-                });
-
-            if (limit is not null)
-            {
-                query = query.Take(limit.Value);
-            }
-
-            return query.ToList();
+                })
+                .ToList();
         }
 
         public MailPreviewDto ConvertToPreview(MailModel mail)