fin de arbre suite

2024-12-04 15:49:35 +01:00
parent 85103a2222
commit 731020a934
17 changed files with 417 additions and 0 deletions
--- a/DEV3.2/arbre_suite/Authentification/auth_sans_API/Authentification.java
+++ b/DEV3.2/arbre_suite/Authentification/auth_sans_API/Authentification.java
@@ -0,0 +1,140 @@
+import java.util.Scanner;
+
+public class Authentification {
+
+    private Node root;
+
+    // Ajouter un utilisateur
+    public void addUser(String username, String password) {
+        root = addUserRec(root, username, password);
+        System.out.println("Utilisateur \"" + username + "\" ajouté");
+    }
+
+    private Node addUserRec(Node node, String username, String password) {
+        if (node == null) {
+            return new Node(username, password);
+        }
+        if (username.compareTo(node.username) < 0) {
+            node.left = addUserRec(node.left, username, password);
+        } else if (username.compareTo(node.username) > 0) {
+            node.right = addUserRec(node.right, username, password);
+        } else {
+            node.password = password; // Mise à jour du mot de passe si utilisateur existe
+        }
+        return node;
+    }
+
+    // Supprimer un utilisateur
+    public void removeUser(String username) {
+        root = removeUserRec(root, username);
+    }
+
+    private Node removeUserRec(Node node, String username) {
+        if (node == null) {
+            System.out.println("Utilisateur \"" + username + "\" non trouvé.");
+            return null;
+        }
+
+        if (username.compareTo(node.username) < 0) {
+            node.left = removeUserRec(node.left, username);
+        } else if (username.compareTo(node.username) > 0) {
+            node.right = removeUserRec(node.right, username);
+        } else {
+            // Cas où l'utilisateur est trouvé
+            if (node.left == null){
+                System.out.println("Utilisateur \"" + username + "\" retiré");
+                return node.right;
+            }
+            if (node.right == null){
+                System.out.println("Utilisateur \"" + username + "\" retiré");
+                return node.left;
+            }
+
+            // Remplacer par le successeur in-order
+            Node minNode = findMin(node.right);
+            node.username = minNode.username;
+            node.password = minNode.password;
+            node.right = removeUserRec(node.right, minNode.username);
+        }
+        System.out.println("Utilisateur \"" + username + "\" retiré");
+        return node;
+    }
+
+    private Node findMin(Node node) {
+        while (node.left != null) {
+            node = node.left;
+        }
+        return node;
+    }
+
+    // Authentification d’un utilisateur
+    public void authenticate(String username, String password) {
+        Node user = findUser(root, username);
+        if (user != null && user.password.equals(password)) {
+            System.out.println("Utilisateur \"" + username + "\" reconnu");
+        } else {
+            System.out.println("Utilisateur \"" + username + "\" non reconnu");
+        }
+    }
+
+    private Node findUser(Node node, String username) {
+        if (node == null){
+             return null;
+        }
+        if (username.equals(node.username)){
+             return node;
+        }
+        if (username.compareTo(node.username) < 0) {
+            return findUser(node.left, username);
+        }
+        return findUser(node.right, username);
+    }
+
+    // Main pour le test
+    public static void main(String[] args) {
+        Authentification auth = new Authentification();
+        Scanner scanner = new Scanner(System.in);
+
+        while (true) {
+            System.out.print("> ");
+            String command = scanner.nextLine();
+            String[] parts = command.split(" ");
+
+            if (parts.length == 0) continue;
+
+            switch (parts[0].toLowerCase()) {
+                case "add":
+                    if (parts.length == 3) {
+                        auth.addUser(parts[1], parts[2]);
+                    } else {
+                        System.out.println("Usage : add <username> <password>");
+                    }
+                    break;
+
+                case "del":
+                    if (parts.length == 2) {
+                        auth.removeUser(parts[1]);
+                    } else {
+                        System.out.println("Usage : del <username>");
+                    }
+                    break;
+
+                case "auth":
+                    if (parts.length == 3) {
+                        auth.authenticate(parts[1], parts[2]);
+                    } else {
+                        System.out.println("Usage : auth <username> <password>");
+                    }
+                    break;
+
+                case "quit":
+                    System.out.println("Au revoir");
+                    scanner.close();
+                    return;
+
+                default:
+                    System.out.println("Commande non reconnue.");
+            }
+        }
+    }
+}