From 0a11e765ad9de5731c3a0c27c884576004062713 Mon Sep 17 00:00:00 2001
From: androidlover5842 <androidlover5842@gmail.com>
Date: Sun, 1 Feb 2026 23:00:03 +0530
Subject: [PATCH] Randomize property codes with 7-char alphabet

---
 .../trisolarisserver/controller/property/Properties.kt | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/main/kotlin/com/android/trisolarisserver/controller/property/Properties.kt b/src/main/kotlin/com/android/trisolarisserver/controller/property/Properties.kt
index 4705799..e7233d6 100644
--- a/src/main/kotlin/com/android/trisolarisserver/controller/property/Properties.kt
+++ b/src/main/kotlin/com/android/trisolarisserver/controller/property/Properties.kt
@@ -39,6 +39,8 @@ class Properties(
     private val propertyUserRepo: PropertyUserRepo,
     private val appUserRepo: AppUserRepo
 ) {
+    private val codeRandom = java.security.SecureRandom()
+    private val codeAlphabet = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"
 
     @PostMapping("/properties")
     @ResponseStatus(HttpStatus.CREATED)
@@ -277,8 +279,12 @@ class Properties(
     }
 
     private fun generatePropertyCode(): String {
-        repeat(10) {
-            val code = "HOTE" + (100..999).random()
+        repeat(200) {
+            val code = buildString(7) {
+                repeat(7) {
+                    append(codeAlphabet[codeRandom.nextInt(codeAlphabet.length)])
+                }
+            }
             if (!propertyRepo.existsByCode(code)) {
                 return code
             }