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src/main/java/org/to/telegramfinalproject/Database/PrivateChatDatabase.java

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+package org.to.telegramfinalproject.Database;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+
+public class PrivateChatDatabase {
+
+
+    public static List<UUID> getMembers(UUID privateChatId) {
+        String sql = "SELECT user1, user2 FROM private_chats WHERE chat_id = ?";
+        try (Connection conn = ConnectionDb.connect();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+            ps.setObject(1, privateChatId);
+            ResultSet rs = ps.executeQuery();
+            if (rs.next()) {
+                UUID user1 = (UUID) rs.getObject("user1");
+                UUID user2 = (UUID) rs.getObject("user2");
+                return Arrays.asList(user1, user2);
+            }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return new ArrayList<>();
+    }
+
+}