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WalkthroughAdded an interactive CLI to Main.java with username/password login, a menu for mission queries and account CRUD operations backed by JDBC; README.md gained a review-due-date badge. (50 words) Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant CLI as Main.run()
participant DB as Database (JDBC)
User->>CLI: Enter username/password
CLI->>DB: validateLogin (prepared statement query)
DB-->>CLI: login result (success/failure)
alt success
CLI->>User: Show main menu
User->>CLI: Select action (list/get/count/create/update/delete)
CLI->>DB: perform chosen DB operation (query/update)
DB-->>CLI: result (rows / update count / error)
CLI->>User: Display result, prompt to continue
else failure
CLI->>User: Inform failure, offer retry/exit
end
Estimated code review effort🎯 4 (Complex) | ⏱️ ~45 minutes
Poem
Pre-merge checks and finishing touches❌ Failed checks (1 warning, 1 inconclusive)
✅ Passed checks (1 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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Actionable comments posted: 2
Caution
Some comments are outside the diff and can’t be posted inline due to platform limitations.
⚠️ Outside diff range comments (1)
src/main/java/com/example/Main.java (1)
16-105: Integration tests will hang due to extra "Press Enter to continue" prompt. The test harness provides exact input sequences via ByteArrayInputStream (lines 100–103 consume input the tests don't provide), causingscanner.nextLine()to block indefinitely and trigger the 10-second timeout at line 281 of CliAppIT.java.Additionally, after an invalid login, choosing to continue (anything other than "0") bypasses authentication entirely and grants access to the main menu without re-prompting for credentials. The
if (!isValid)block at lines 45–53 only returns if the user enters "0"; any other input falls through to the main menu with no reauthentication check.Both issues must be fixed: loop the login prompt until valid credentials are provided, and remove the pause after menu actions (or gate it behind a flag) so tests receive only the inputs they expect.
🧹 Nitpick comments (1)
src/main/java/com/example/Main.java (1)
3-5: Wildcard JDBC import is OK, but keep an eye on hidden ambiguity. If you later add types likeDate(java.util vs java.sql), wildcard imports can make this harder to spot.
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README.md(1 hunks)src/main/java/com/example/Main.java(3 hunks)
🔇 Additional comments (2)
README.md (1)
1-1: Badge addition looks fine.src/main/java/com/example/Main.java (1)
141-165: DB operations look reasonable (prepared statements where needed). The basic JDBC usage and error handling won’t crash the CLI for bad inputs.Also applies to: 167-183, 225-273
| private boolean validateLogin(String username, String password, | ||
| String jdbcUrl, String dbUser, String dbPass) { | ||
| String sql = "SELECT 1 FROM account WHERE name = ? AND password = ?"; | ||
| try (Connection conn = DriverManager.getConnection(jdbcUrl, dbUser, dbPass); | ||
| PreparedStatement stmt = conn.prepareStatement(sql)) { | ||
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| stmt.setString(1, username); | ||
| stmt.setString(2, password); | ||
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| ResultSet rs = stmt.executeQuery(); | ||
| return rs.next(); | ||
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| } catch (SQLException e) { | ||
| System.err.println("Login error: " + e.getMessage()); | ||
| return false; | ||
| } | ||
| } |
There was a problem hiding this comment.
Close ResultSet explicitly (minor), and avoid printing raw SQL errors that may include sensitive info.
- ResultSet rs = stmt.executeQuery();
- return rs.next();
+ try (ResultSet rs = stmt.executeQuery()) {
+ return rs.next();
+ }
} catch (SQLException e) {
- System.err.println("Login error: " + e.getMessage());
+ System.err.println("Login error");
return false;
}🤖 Prompt for AI Agents
In src/main/java/com/example/Main.java around lines 107 to 123, the code doesn't
close the ResultSet explicitly and prints raw SQL error via System.err which may
leak sensitive info; change the try-with-resources to include the ResultSet (or
wrap the executeQuery call in its own try-with-resources) so rs is closed,
replace System.err prints with a proper logger call that emits a generic error
message (e.g., "Login failed") and send the SQLException details to a secure
debug/trace log rather than standard error or user-facing output, and ensure no
sensitive SQL or credential data is included in the logged messages.
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Actionable comments posted: 3
♻️ Duplicate comments (2)
src/main/java/com/example/Main.java (2)
107-124: Don’t print raw SQL exception messages on login (info leak) — this repeats a previously-raised concern; log a generic message to the user and keep details for debug logs only.- } catch (SQLException e) { - System.err.println("Login error: " + e.getMessage()); + } catch (SQLException e) { + System.err.println("Login failed"); return false; }
168-184: CloseResultSetincountMissionsByYear(currently not in try-with-resources)- stmt.setInt(1, Integer.parseInt(year)); - ResultSet rs = stmt.executeQuery(); - - if (rs.next()) { - int count = rs.getInt("count"); - System.out.println("Number of missions in " + year + ": " + count); - } + stmt.setInt(1, Integer.parseInt(year)); + try (ResultSet rs = stmt.executeQuery()) { + if (rs.next()) { + int count = rs.getInt("count"); + System.out.println("Number of missions in " + year + ": " + count); + } + }
🧹 Nitpick comments (3)
src/main/java/com/example/Main.java (3)
3-5: Avoidjava.sql.*wildcard import — it hurts readability and can mask name collisions.
16-31: Redundant connection open/close inrun()(unusedconnection) — either reuse it for the session or remove this “connectivity check” to avoid extra connections.- try (Connection connection = DriverManager.getConnection(jdbcUrl, dbUser, dbPass)) { - } catch (SQLException e) { - throw new RuntimeException(e); - } + // Optional: keep a connectivity check, but prefer reusing a single Connection for the CLI session.
225-250: Consider basic input validation forupdateAccountPassword(empty password, password policy) to prevent accidental lockouts.
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📒 Files selected for processing (1)
src/main/java/com/example/Main.java(3 hunks)
🔇 Additional comments (3)
src/main/java/com/example/Main.java (3)
126-140: LGTM: resources closed correctly inlistMoonMissions(Connection/Statement/ResultSet all in try-with-resources).
252-272: LGTM:deleteAccountuses prepared statement and checks affected rows.
302-310: LGTM:cap3()matches expected mixed-case username convention and handles null/blank safely.
| Scanner scanner = new Scanner(System.in); | ||
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| System.out.println("Username:"); | ||
| String username = scanner.nextLine(); | ||
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| System.out.println("Password:"); | ||
| String password = scanner.nextLine(); | ||
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| boolean isValid = validateLogin(username, password, jdbcUrl, dbUser, dbPass); | ||
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| if (!isValid) { | ||
| System.out.println("Invalid username or password"); | ||
| // Testarna förväntar sig att man kan välja 0 för att avsluta | ||
| System.out.print("Press 0 to exit or any key to continue..."); | ||
| String choice = scanner.nextLine(); | ||
| if ("0".equals(choice)) { | ||
| return; | ||
| } | ||
| } else { | ||
| System.out.println("Login successful!"); | ||
| } | ||
|
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| // Huvudmeny | ||
| boolean running = true; | ||
| while (running) { | ||
| System.out.println("1) List moon missions"); | ||
| System.out.println("2) Get a moon mission by mission_id"); | ||
| System.out.println("3) Count missions for a given year"); | ||
| System.out.println("4) Create an account"); | ||
| System.out.println("5) Update an account password"); | ||
| System.out.println("6) Delete an account"); | ||
| System.out.println("0) Exit"); | ||
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| System.out.print("Enter choice: "); | ||
| String choice = scanner.nextLine(); | ||
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| switch (choice) { | ||
| case "1": | ||
| listMoonMissions(jdbcUrl, dbUser, dbPass); | ||
| break; | ||
| case "2": | ||
| System.out.print("Enter mission ID: "); | ||
| String missionId = scanner.nextLine(); | ||
| getMissionById(jdbcUrl, dbUser, dbPass, missionId); | ||
| break; | ||
| case "3": | ||
| System.out.print("Enter year: "); | ||
| String year = scanner.nextLine(); | ||
| countMissionsByYear(jdbcUrl, dbUser, dbPass, year); | ||
| break; | ||
| case "4": | ||
| createAccount(jdbcUrl, dbUser, dbPass, scanner); | ||
| break; | ||
| case "5": | ||
| updateAccountPassword(jdbcUrl, dbUser, dbPass, scanner); | ||
| break; | ||
| case "6": | ||
| deleteAccount(jdbcUrl, dbUser, dbPass, scanner); | ||
| break; | ||
| case "0": | ||
| System.out.println("Exiting..."); | ||
| running = false; | ||
| break; | ||
| default: | ||
| System.out.println("Invalid choice"); | ||
| } | ||
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| if (running && !choice.equals("0")) { | ||
| System.out.println("\nPress Enter to continue..."); | ||
| scanner.nextLine(); | ||
| } | ||
| } | ||
| } |
There was a problem hiding this comment.
Don’t allow main menu access after failed login — currently, a user can fail auth and still proceed into CRUD/query operations by choosing “any key to continue”.
- System.out.println("Username:");
- String username = scanner.nextLine();
-
- System.out.println("Password:");
- String password = scanner.nextLine();
-
- boolean isValid = validateLogin(username, password, jdbcUrl, dbUser, dbPass);
-
- if (!isValid) {
- System.out.println("Invalid username or password");
- // Testarna förväntar sig att man kan välja 0 för att avsluta
- System.out.print("Press 0 to exit or any key to continue...");
- String choice = scanner.nextLine();
- if ("0".equals(choice)) {
- return;
- }
- } else {
- System.out.println("Login successful!");
- }
+ boolean isValid = false;
+ while (!isValid) {
+ System.out.println("Username:");
+ String username = scanner.nextLine();
+
+ System.out.println("Password:");
+ String password = scanner.nextLine();
+
+ isValid = validateLogin(username, password, jdbcUrl, dbUser, dbPass);
+ if (!isValid) {
+ System.out.println("Invalid username or password");
+ // Testarna förväntar sig att man kan välja 0 för att avsluta
+ System.out.print("Press 0 to exit or any key to try again...");
+ String choice = scanner.nextLine();
+ if ("0".equals(choice)) return;
+ }
+ }
+ System.out.println("Login successful!");📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| Scanner scanner = new Scanner(System.in); | |
| System.out.println("Username:"); | |
| String username = scanner.nextLine(); | |
| System.out.println("Password:"); | |
| String password = scanner.nextLine(); | |
| boolean isValid = validateLogin(username, password, jdbcUrl, dbUser, dbPass); | |
| if (!isValid) { | |
| System.out.println("Invalid username or password"); | |
| // Testarna förväntar sig att man kan välja 0 för att avsluta | |
| System.out.print("Press 0 to exit or any key to continue..."); | |
| String choice = scanner.nextLine(); | |
| if ("0".equals(choice)) { | |
| return; | |
| } | |
| } else { | |
| System.out.println("Login successful!"); | |
| } | |
| // Huvudmeny | |
| boolean running = true; | |
| while (running) { | |
| System.out.println("1) List moon missions"); | |
| System.out.println("2) Get a moon mission by mission_id"); | |
| System.out.println("3) Count missions for a given year"); | |
| System.out.println("4) Create an account"); | |
| System.out.println("5) Update an account password"); | |
| System.out.println("6) Delete an account"); | |
| System.out.println("0) Exit"); | |
| System.out.print("Enter choice: "); | |
| String choice = scanner.nextLine(); | |
| switch (choice) { | |
| case "1": | |
| listMoonMissions(jdbcUrl, dbUser, dbPass); | |
| break; | |
| case "2": | |
| System.out.print("Enter mission ID: "); | |
| String missionId = scanner.nextLine(); | |
| getMissionById(jdbcUrl, dbUser, dbPass, missionId); | |
| break; | |
| case "3": | |
| System.out.print("Enter year: "); | |
| String year = scanner.nextLine(); | |
| countMissionsByYear(jdbcUrl, dbUser, dbPass, year); | |
| break; | |
| case "4": | |
| createAccount(jdbcUrl, dbUser, dbPass, scanner); | |
| break; | |
| case "5": | |
| updateAccountPassword(jdbcUrl, dbUser, dbPass, scanner); | |
| break; | |
| case "6": | |
| deleteAccount(jdbcUrl, dbUser, dbPass, scanner); | |
| break; | |
| case "0": | |
| System.out.println("Exiting..."); | |
| running = false; | |
| break; | |
| default: | |
| System.out.println("Invalid choice"); | |
| } | |
| if (running && !choice.equals("0")) { | |
| System.out.println("\nPress Enter to continue..."); | |
| scanner.nextLine(); | |
| } | |
| } | |
| } | |
| boolean isValid = false; | |
| while (!isValid) { | |
| System.out.println("Username:"); | |
| String username = scanner.nextLine(); | |
| System.out.println("Password:"); | |
| String password = scanner.nextLine(); | |
| isValid = validateLogin(username, password, jdbcUrl, dbUser, dbPass); | |
| if (!isValid) { | |
| System.out.println("Invalid username or password"); | |
| // Testarna förväntar sig att man kan välja 0 för att avsluta | |
| System.out.print("Press 0 to exit or any key to try again..."); | |
| String choice = scanner.nextLine(); | |
| if ("0".equals(choice)) return; | |
| } | |
| } | |
| System.out.println("Login successful!"); | |
| // Huvudmeny | |
| boolean running = true; | |
| while (running) { | |
| System.out.println("1) List moon missions"); | |
| System.out.println("2) Get a moon mission by mission_id"); | |
| System.out.println("3) Count missions for a given year"); | |
| System.out.println("4) Create an account"); | |
| System.out.println("5) Update an account password"); | |
| System.out.println("6) Delete an account"); | |
| System.out.println("0) Exit"); | |
| System.out.print("Enter choice: "); | |
| String choice = scanner.nextLine(); | |
| switch (choice) { | |
| case "1": | |
| listMoonMissions(jdbcUrl, dbUser, dbPass); | |
| break; | |
| case "2": | |
| System.out.print("Enter mission ID: "); | |
| String missionId = scanner.nextLine(); | |
| getMissionById(jdbcUrl, dbUser, dbPass, missionId); | |
| break; | |
| case "3": | |
| System.out.print("Enter year: "); | |
| String year = scanner.nextLine(); | |
| countMissionsByYear(jdbcUrl, dbUser, dbPass, year); | |
| break; | |
| case "4": | |
| createAccount(jdbcUrl, dbUser, dbPass, scanner); | |
| break; | |
| case "5": | |
| updateAccountPassword(jdbcUrl, dbUser, dbPass, scanner); | |
| break; | |
| case "6": | |
| deleteAccount(jdbcUrl, dbUser, dbPass, scanner); | |
| break; | |
| case "0": | |
| System.out.println("Exiting..."); | |
| running = false; | |
| break; | |
| default: | |
| System.out.println("Invalid choice"); | |
| } | |
| if (running && !choice.equals("0")) { | |
| System.out.println("\nPress Enter to continue..."); | |
| scanner.nextLine(); | |
| } | |
| } | |
| } |
🤖 Prompt for AI Agents
In src/main/java/com/example/Main.java around lines 33 to 105, the code allows
users who fail authentication to continue into the main menu by choosing "any
key to continue"; fix this by preventing access to the menu when isValid is
false — either return/exit immediately on failed login or loop back to re-prompt
for credentials, or move the entire main menu block inside the existing else
branch so it only runs when isValid is true; update the control flow accordingly
and remove the "continue to menu" prompt after a failed login.
| private void getMissionById(String jdbcUrl, String dbUser, String dbPass, String missionId) { | ||
| String sql = "SELECT * FROM moon_mission WHERE mission_id = ?"; | ||
| try (Connection conn = DriverManager.getConnection(jdbcUrl, dbUser, dbPass); | ||
| PreparedStatement stmt = conn.prepareStatement(sql)) { | ||
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| stmt.setInt(1, Integer.parseInt(missionId)); | ||
| ResultSet rs = stmt.executeQuery(); | ||
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| if (rs.next()) { | ||
| System.out.println("\n=== Mission Details ==="); | ||
| System.out.println("Mission ID: " + rs.getInt("mission_id")); | ||
| System.out.println("Spacecraft: " + rs.getString("spacecraft")); | ||
| System.out.println("Launch Date: " + rs.getDate("launch_date")); | ||
| System.out.println("Carrier Rocket: " + rs.getString("carrier_rocket")); | ||
| System.out.println("Operator: " + rs.getString("operator")); | ||
| System.out.println("Mission Type: " + rs.getString("mission_type")); | ||
| System.out.println("Outcome: " + rs.getString("outcome")); | ||
| } else { | ||
| System.out.println("Mission not found"); | ||
| } | ||
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| } catch (SQLException | NumberFormatException e) { | ||
| System.err.println("Error: " + e.getMessage()); | ||
| } | ||
| } |
There was a problem hiding this comment.
Close ResultSet in getMissionById (currently not in try-with-resources) — avoid leaking cursors/resources.
- stmt.setInt(1, Integer.parseInt(missionId));
- ResultSet rs = stmt.executeQuery();
-
- if (rs.next()) {
+ stmt.setInt(1, Integer.parseInt(missionId));
+ try (ResultSet rs = stmt.executeQuery()) {
+ if (rs.next()) {
System.out.println("\n=== Mission Details ===");
System.out.println("Mission ID: " + rs.getInt("mission_id"));
System.out.println("Spacecraft: " + rs.getString("spacecraft"));
System.out.println("Launch Date: " + rs.getDate("launch_date"));
System.out.println("Carrier Rocket: " + rs.getString("carrier_rocket"));
System.out.println("Operator: " + rs.getString("operator"));
System.out.println("Mission Type: " + rs.getString("mission_type"));
System.out.println("Outcome: " + rs.getString("outcome"));
- } else {
- System.out.println("Mission not found");
+ } else {
+ System.out.println("Mission not found");
+ }
}🤖 Prompt for AI Agents
In src/main/java/com/example/Main.java around lines 142 to 166, the ResultSet
returned by stmt.executeQuery() is not closed, risking cursor/resource leaks;
update the method to ensure the ResultSet is closed by using a
try-with-resources that includes the ResultSet (or nest a try-with-resources) so
the PreparedStatement and ResultSet are both created in try-with-resources
blocks (e.g., prepare the statement, then assign executeQuery() to a ResultSet
variable declared in a try-with-resources), and remove reliance on implicit
closing so all JDBC resources are properly closed even on exceptions.
| private void createAccount(String jdbcUrl, String dbUser, String dbPass, Scanner scanner) { | ||
| System.out.print("First name: "); | ||
| String firstName = scanner.nextLine(); | ||
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| System.out.print("Last name: "); | ||
| String lastName = scanner.nextLine(); | ||
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| System.out.print("SSN: "); | ||
| String ssn = scanner.nextLine(); | ||
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| System.out.print("Password: "); | ||
| String password = scanner.nextLine(); | ||
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| // Skapa username från förnamn + första 3 bokstäver av efternamn | ||
| String username = cap3(firstName) + cap3(lastName); | ||
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| String sql = "INSERT INTO account (first_name, last_name, ssn, name, password) " + | ||
| "VALUES (?, ?, ?, ?, ?)"; | ||
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| try (Connection conn = DriverManager.getConnection(jdbcUrl, dbUser, dbPass); | ||
| PreparedStatement stmt = conn.prepareStatement(sql)) { | ||
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| stmt.setString(1, firstName); | ||
| stmt.setString(2, lastName); | ||
| stmt.setString(3, ssn); | ||
| stmt.setString(4, username); | ||
| stmt.setString(5, password); | ||
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| int rows = stmt.executeUpdate(); | ||
| if (rows > 0) { | ||
| System.out.println("Account created successfully!"); | ||
| System.out.println("Username: " + username); | ||
| } | ||
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| } catch (SQLException e) { | ||
| System.err.println("Error creating account: " + e.getMessage()); | ||
| } | ||
| } |
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Plaintext password storage and validation is a critical security vulnerability — passwords are stored and compared in plaintext across createAccount (line 210), validateLogin (line 109), and updateAccountPassword. Add a password hashing library (e.g., jBCrypt) to dependencies and hash passwords before storing; validate logins by comparing hashed password using a constant-time comparison.
Similarly, SSN should not be stored in plaintext.
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Summary by CodeRabbit
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New Features
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