From 71d06c12adb7aff2e367c967648d9b55d1de3a76 Mon Sep 17 00:00:00 2001
From: HPL-JesusCastro <jesus.castro.hplgamedesign@gmail.com>
Date: Sat, 23 May 2026 02:41:14 +0800
Subject: [PATCH] fix streak counting

---
 backend/src/routes/letters.ts | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/backend/src/routes/letters.ts b/backend/src/routes/letters.ts
index 8f0b8ab..6a7fb8d 100644
--- a/backend/src/routes/letters.ts
+++ b/backend/src/routes/letters.ts
@@ -70,12 +70,20 @@ export async function letterRoutes(app: FastifyInstance) {
     let current = 0;
     let longest = 0;
     let streak = 0;
+    let inCurrentStreak = true;
     let prev: Date | null = null;
 
-    for (let i = 0; i < dates.length; i++) {
-      const d = new Date(dates[i]);
-      streak = prev === null ? 1 : (prev.getTime() - d.getTime()) / 86400000 === 1 ? streak + 1 : 1;
-      if (i === 0) current = streak;
+    for (const dateStr of dates) {
+      const d = new Date(dateStr);
+      if (prev === null) {
+        streak = 1;
+      } else if ((prev.getTime() - d.getTime()) / 86400000 === 1) {
+        streak++;
+      } else {
+        streak = 1;
+        inCurrentStreak = false;
+      }
+      if (inCurrentStreak) current = streak;
       longest = Math.max(longest, streak);
       prev = d;
     }