feat: implement transaction handling and add integration tests for Plaid transaction handlers

src/FiscalOS.Core/Transactions/Transaction.cs

@@ -2,13 +2,13 @@ namespace FiscalOS.Core.Transactions;
 
 public sealed class Transaction : Entity
 {
-  public Guid UserId { get; init; }
+  public Guid UserId { get; private set; }
   public User? User { get; init; }
 
   public Guid AccountId { get; init; }
   public Account? Account { get; init; }
 
-  public string MerchantName { get; init; } = string.Empty;
+  public string MerchantName { get; private set; } = string.Empty;
   public string Description { get; init; } = string.Empty;
   public decimal Amount { get; init; }
   public DateTimeOffset Date { get; init; }
@@ -27,7 +27,7 @@ public sealed class Transaction : Entity
     TransactionMetadata metadata
   )
   {
-    return From(Guid.Empty, Guid.Empty, merchantName, description, amount, date, metadata);
+    return From(Guid.Empty, Guid.Empty, Guid.Empty, merchantName, description, amount, date, metadata);
   }
 
   public static Transaction From(
@@ -39,6 +39,20 @@ public sealed class Transaction : Entity
     DateTimeOffset? date,
     TransactionMetadata metadata
   )
+  {
+    return From(Guid.Empty, userId, accountId, merchantName, description, amount, date, metadata);
+  }
+
+  public static Transaction From(
+    Guid id,
+    Guid userId,
+    Guid accountId,
+    string merchantName,
+    string description,
+    decimal? amount,
+    DateTimeOffset? date,
+    TransactionMetadata metadata
+  )
   {
     ArgumentNullException.ThrowIfNull(merchantName, nameof(merchantName));
     ArgumentNullException.ThrowIfNull(description, nameof(description));
@@ -55,6 +69,7 @@ public sealed class Transaction : Entity
 
     return new()
     {
+      Id = id,
       UserId = userId,
       AccountId = accountId,
       MerchantName = merchantName,

src/FiscalOS.Infra/Transactions/Plaid/PlaidAddedTransactionHandler.cs

@@ -26,6 +26,14 @@ internal sealed class PlaidAddedTransactionHandler : IPlaidAddedTransactionHandl
     _appDbContext = appDbContext;
   }
 
+  public static PlaidAddedTransactionHandler From(
+    ILogger<PlaidAddedTransactionHandler> logger,
+    AppDbContext appDbContext
+  )
+  {
+    return new(logger, appDbContext);
+  }
+
   public static PlaidAddedTransactionHandler From(IServiceProvider serviceProvider)
   {
     return new(

src/FiscalOS.Infra/Transactions/Plaid/PlaidModifiedTransactionHandler.cs

@@ -26,6 +26,14 @@ internal sealed class PlaidModifiedTransactionHandler : IPlaidModifiedTransactio
     _appDbContext = appDbContext;
   }
 
+  public static PlaidModifiedTransactionHandler From(
+    ILogger<PlaidModifiedTransactionHandler> logger,
+    AppDbContext appDbContext
+  )
+  {
+    return new(logger, appDbContext);
+  }
+
   public static PlaidModifiedTransactionHandler From(IServiceProvider serviceProvider)
   {
     return new(
@@ -71,6 +79,7 @@ internal sealed class PlaidModifiedTransactionHandler : IPlaidModifiedTransactio
         }
 
         var newTransactionData = Transaction.From(
+          existing.Id,
           existing.UserId,
           existing.AccountId,
           plaidModifiedTransaction.Merchant,

src/FiscalOS.Infra/Transactions/Plaid/PlaidTransactionProcessor.cs

@@ -28,6 +28,15 @@ internal sealed class PlaidTransactionProcessor : IPlaidTransactionProcessor
     _removedHandler = removedHandler;
   }
 
+  internal static PlaidTransactionProcessor From(
+    IPlaidAddedTransactionHandler addedHandler,
+    IPlaidModifiedTransactionHandler modifiedHandler,
+    IPlaidRemovedTransactionHandler removedHandler
+  )
+  {
+    return new(addedHandler, modifiedHandler, removedHandler);
+  }
+
   internal static PlaidTransactionProcessor From(IServiceProvider provider)
   {
     return new(

src/FiscalOS.Infra/Transactions/Plaid/PlaidTransactionSyncer.cs

@@ -28,6 +28,15 @@ internal sealed class PlaidTransactionSyncer : IPlaidTransactionSyncer
     _transactionProcessor = plaidTransactionProcessor;
   }
 
+  public static PlaidTransactionSyncer From(
+    ILogger<PlaidTransactionSyncer> logger,
+    IPlaidTransactionService plaidTransactionService,
+    IPlaidTransactionProcessor plaidTransactionProcessor
+  )
+  {
+    return new(logger, plaidTransactionService, plaidTransactionProcessor);
+  }
+
   public static PlaidTransactionSyncer From(IServiceProvider serviceProvider)
   {
     return new(