fix(db): resolve unique constraint error by overwriting existing shops at location

src/main/java/party/cybsec/oyeshops/database/ShopRepository.java

@@ -178,6 +178,21 @@ public class ShopRepository {
         }
     }
 
+    /**
+     * delete shop by location (world, x, y, z)
+     */
+    public void deleteShopByLocation(Location loc) throws SQLException {
+        String sql = "delete from shops where world_uuid = ? and sign_x = ? and sign_y = ? and sign_z = ?";
+
+        try (PreparedStatement stmt = dbManager.getConnection().prepareStatement(sql)) {
+            stmt.setString(1, loc.getWorld().getUID().toString());
+            stmt.setInt(2, loc.getBlockX());
+            stmt.setInt(3, loc.getBlockY());
+            stmt.setInt(4, loc.getBlockZ());
+            stmt.executeUpdate();
+        }
+    }
+
     /**
      * get all shops owned by player
      */

src/main/java/party/cybsec/oyeshops/gui/SetupDialog.java

@@ -30,7 +30,7 @@ public class SetupDialog {
                                                 .inputs(List.of(
                                                                 // product (selling)
                                                                 DialogInput.text("product_item",
-                                                                                Component.text("what are you selling? (e.g. diamond)",
+                                                                                Component.text("what are you selling? (e.g. oak log)",
                                                                                                 NamedTextColor.YELLOW))
                                                                                 .build(),
                                                                 DialogInput.text("product_qty",
@@ -41,7 +41,7 @@ public class SetupDialog {
 
                                                                 // price (buying)
                                                                 DialogInput.text("price_item",
-                                                                                Component.text("what do you want? (e.g. gold ingot)",
+                                                                                Component.text("what do you want? (e.g. diamond)",
                                                                                                 NamedTextColor.GREEN))
                                                                                 .build(),
                                                                 DialogInput.text("price_qty",

src/main/java/party/cybsec/oyeshops/listener/ShopActivationListener.java

@@ -198,6 +198,9 @@ public class ShopActivationListener implements Listener {
 
         plugin.getServer().getScheduler().runTaskAsynchronously(plugin, () -> {
             try {
+                // cleanup potential existing shop to avoid unique constraint error
+                plugin.getShopRepository().deleteShopByLocation(signLocation);
+
                 int shopId = plugin.getShopRepository().createShop(shop);
                 plugin.getServer().getScheduler().runTask(plugin, () -> {
                     // re-verify sign on main thread