OopsOverflow / Veggie-Pet

Transforms trees into pets - ironically.

Programmation Java @ Et3
Polytech Paris-Saclay | 2020-21

Veggie Pet

Trees 🌲 are now Pets 🐱

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About

A console simulation program of a tree organization.
This is a school project made for the Java & OOP course.
Developed with Java SE 16.

Dependencies

1. OpenCSV : Parse CSV files for Trees data
2. Apache Commons Packages : Different Data Structures used to optimize the complexity of certain algorithms.
3. SQLite v3.34.0 : Store data in a locally created database.

Some Implementation Details 🔎

✅ Certain Data Structure such as Queues and Hash Maps were used to improve
the Visits and Voting algorithms time complexity.

✅ SQLite 💾 was used to create and manage local DBs. All Queries are under src/com/sys/OrganisationDB.java

public static String connect(String name) {  
    Connection conn = null;  
    // db parameters  
  name = name.replaceAll("\\s+","");  
    String fileName = new File("src/com/entity/org").getAbsolutePath() + "\\";  
    String url = "jdbc:sqlite:" + fileName + name + ".db";  
    try {  
        // create a connection to the database  
  conn = DriverManager.getConnection(url);  
     System.out.println("Connection to SQLite has been established.");  
    } catch (SQLException e) {  
        System.out.println(e.getMessage());  
    } finally {  
        try {  
            if (conn != null) {  
                conn.close();  
            }  
        } catch (SQLException ex) {  
            System.err.println(ex.getMessage());  
            url = null;  
        }  
    }  
    return url;  
}

✅ The Municipality can push notification at a random time within the year's period.
This is achieved by creating a thread and scheduling ⏳ its execution for later.

    // The Notification can be sent later
    Timer timer = new Timer(); // creating timer
    TimerTask task = this.classifyTree(tree, LocalDateTime.now()); // creating timer task
    timer.schedule(task, new Date()); // scheduling the task

✅ An AES 256bit Encryption algorithm is used to secure 🔒 members' data.
Code is under src/com/system/EncryptionDecryptionUtil.java

public static String encrypt(final String secret, final String data) {

    byte[] decodedKey = Base64.getDecoder().decode(secret);

    try {
        Cipher cipher = Cipher.getInstance("AES");
        // rebuild key using SecretKeySpec
        SecretKey originalKey = new SecretKeySpec(Arrays.copyOf(decodedKey, 16), "AES");
        cipher.init(Cipher.ENCRYPT_MODE, originalKey);
        byte[] cipherText = cipher.doFinal(data.getBytes("UTF-8"));
        return Base64.getEncoder().encodeToString(cipherText);
    } catch (Exception e) {
        throw new RuntimeException(
                "Error occured while encrypting data", e);
    }
}

Test Run 🎯

Credits ©

Name	GitHub	Group
Mahmoud Houssem	@OopsOverflow	GR2
Neraudau Esteban	@s-posito	GR2