From ca9ca5fca7d51543e5750b41cdd7d963b8f97bcf Mon Sep 17 00:00:00 2001
From: Matthew Raymer <matthew.raymer@anomalistdesign.com>
Date: Thu, 24 Apr 2025 08:42:44 +0000
Subject: [PATCH] fix: prevent duplicate contacts during QR code scanning

- Add explicit duplicate contact check before database insertion
- Show warning notification when duplicate contact is detected
- Return early to prevent duplicate database entries
- Improve user feedback for duplicate contact scenarios

This change ensures users get clear feedback when scanning an already-added contact and prevents duplicate entries in the contacts database.
---
 src/views/ContactQRScanShowView.vue | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/views/ContactQRScanShowView.vue b/src/views/ContactQRScanShowView.vue
index ffe2d767..d9b5be8c 100644
--- a/src/views/ContactQRScanShowView.vue
+++ b/src/views/ContactQRScanShowView.vue
@@ -574,6 +574,26 @@ export default class ContactQRScanShow extends Vue {
     try {
       logger.info("Opening database connection for new contact");
       await db.open();
+      
+      // Check if contact already exists
+      const existingContacts = await db.contacts.toArray();
+      const existingContact = existingContacts.find(c => c.did === contact.did);
+      
+      if (existingContact) {
+        logger.info("Contact already exists", { did: contact.did });
+        this.$notify(
+          {
+            group: "alert",
+            type: "warning",
+            title: "Contact Exists",
+            text: "This contact has already been added to your list.",
+          },
+          3000,
+        );
+        return;
+      }
+
+      // Add new contact
       await db.contacts.add(contact);
 
       if (this.activeDid) {