From ea14466f579864876ae8fc84035b353104f8e760 Mon Sep 17 00:00:00 2001
From: AJ <ajisaacs27@gmail.com>
Date: Sun, 16 Nov 2025 11:53:28 -0500
Subject: [PATCH] Fix: add null checks in AIReceiptParser to prevent null
 reference warnings

Added validation to ensure messageContent is not null or whitespace before
deserializing JSON responses from OpenAI and Claude vision APIs. This fixes
CS8604 warnings about possible null reference arguments.
---
 MoneyMap/Services/AIReceiptParser.cs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/MoneyMap/Services/AIReceiptParser.cs b/MoneyMap/Services/AIReceiptParser.cs
index 78f693d..f6fe840 100644
--- a/MoneyMap/Services/AIReceiptParser.cs
+++ b/MoneyMap/Services/AIReceiptParser.cs
@@ -306,6 +306,11 @@ namespace MoneyMap.Services
                 messageContent = messageContent.Replace("```json", "").Replace("```", "").Trim();
             }
 
+            if (string.IsNullOrWhiteSpace(messageContent))
+            {
+                return new ParsedReceiptData();
+            }
+
             var parsedData = JsonSerializer.Deserialize<ParsedReceiptData>(messageContent, new JsonSerializerOptions
             {
                 PropertyNameCaseInsensitive = true
@@ -388,6 +393,11 @@ namespace MoneyMap.Services
                 messageContent = messageContent.Replace("```json", "").Replace("```", "").Trim();
             }
 
+            if (string.IsNullOrWhiteSpace(messageContent))
+            {
+                return new ParsedReceiptData();
+            }
+
             var parsedData = JsonSerializer.Deserialize<ParsedReceiptData>(messageContent, new JsonSerializerOptions
             {
                 PropertyNameCaseInsensitive = true