From 1b0740eab4755b87447ed97e99a97f851807fa00 Mon Sep 17 00:00:00 2001
From: arnauda-gh <59512940+arnauda-gh@users.noreply.github.com>
Date: Thu, 16 Jul 2026 10:15:04 +0200
Subject: [PATCH] fix(composer): prevent duplicate recipients from being added
 on done/blur action

---
 src/screens/ComposeScreen.tsx | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/screens/ComposeScreen.tsx b/src/screens/ComposeScreen.tsx
index 1dfda9ac..01d55f4b 100644
--- a/src/screens/ComposeScreen.tsx
+++ b/src/screens/ComposeScreen.tsx
@@ -448,11 +448,33 @@ export default function ComposeScreen({ route, navigation }: Props) {
     const extraTo = parseRecipients(toInput);
     const extraCc = parseRecipients(ccInput);
     if (extraTo.length) {
-      setToRecipients((prev) => [...prev, ...extraTo]);
+      setToRecipients((prev) => {
+        const existing = new Set(prev.map((r) => r.email.toLowerCase()));
+        const unique: Recipient[] = [];
+        for (const r of extraTo) {
+          const emailLower = r.email.toLowerCase();
+          if (!existing.has(emailLower)) {
+            existing.add(emailLower);
+            unique.push(r);
+          }
+        }
+        return [...prev, ...unique];
+      });
       setToInput('');
     }
     if (extraCc.length) {
-      setCcRecipients((prev) => [...prev, ...extraCc]);
+      setCcRecipients((prev) => {
+        const existing = new Set(prev.map((r) => r.email.toLowerCase()));
+        const unique: Recipient[] = [];
+        for (const r of extraCc) {
+          const emailLower = r.email.toLowerCase();
+          if (!existing.has(emailLower)) {
+            existing.add(emailLower);
+            unique.push(r);
+          }
+        }
+        return [...prev, ...unique];
+      });
       setCcInput('');
     }
   };