init

source/src/main/model/RepairShop.java

@@ -0,0 +1,91 @@
+package model;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Facade for the model layer. Manages the lifecycle of one repair session at a time
+ * and delegates all operations to the current {@link ActiveRepair}.
+ *
+ * <p>Observers registered via {@link #addObserver(RepairOrderObserver)} are
+ * automatically forwarded to every new repair session that is started.</p>
+ */
+public class RepairShop {
+
+    private ActiveRepair currentRepair;
+    private final List<RepairOrderObserver> observers = new ArrayList<>();
+    private DiscountStrategy discountStrategy = new NoDiscount();
+
+    /**
+     * Creates a new RepairShop ready to accept repair sessions.
+     */
+    public RepairShop() {
+    }
+
+    /**
+     * Registers an observer to be notified whenever a repair order changes.
+     * The observer is passed to every repair session started after this call.
+     *
+     * @param observer The observer to register.
+     */
+    public void addObserver(RepairOrderObserver observer) {
+        observers.add(observer);
+    }
+
+    /**
+     * Sets the discount strategy to apply to each new repair session's total.
+     *
+     * @param strategy The discount strategy; must not be {@code null}.
+     */
+    public void setDiscountStrategy(DiscountStrategy strategy) {
+        this.discountStrategy = strategy;
+    }
+
+    /**
+     * Starts a new repair session, discarding any previously active session.
+     */
+    public void startRepair() {
+        currentRepair = new ActiveRepair();
+        for (RepairOrderObserver observer : observers) {
+            currentRepair.addObserver(observer);
+        }
+        currentRepair.setDiscountStrategy(discountStrategy);
+    }
+
+    /**
+     * Registers the bike that will be worked on during the current repair session.
+     *
+     * @param bike The {@link BikeDTO} of the bike to register.
+     */
+    public void registerBike(BikeDTO bike) {
+        currentRepair.registerBike(bike);
+    }
+
+    /**
+     * Adds a repair task to the current session and returns the updated running total.
+     *
+     * @param task The {@link TaskDTO} of the task to add.
+     * @return The running total after the task has been added.
+     */
+    public Amount addTask(TaskDTO task) {
+        return currentRepair.addTask(task);
+    }
+
+    /**
+     * Records the mechanic's diagnostic notes for the current repair session.
+     *
+     * @param report The diagnostic report text entered by the mechanic.
+     */
+    public void enterDiagnosticReport(String report) {
+        currentRepair.enterDiagnosticReport(report);
+    }
+
+    /**
+     * Ends the current repair session and returns the completed repair order.
+     *
+     * @return The {@link RepairOrder} for the finished repair.
+     */
+    public RepairOrder endRepair() {
+        return currentRepair.endRepair();
+    }
+}