5 files changed, 92 insertions, 1 deletions
diff --git a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/App.java b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/App.java
new file mode 100644
index 0000000..c3f1037
--- /dev/null
+++ b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/App.java
@@ -0,0 +1,16 @@
+package lk.ac.pdn.ceit.pos;
+
+import lk.ac.pdn.ceit.pos.item.InMemoryItemManager;
+import lk.ac.pdn.ceit.pos.item.ItemManager;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        ItemManager itemManager = new InMemoryItemManager();
+
+        PointOfSale pos = new PointOfSale(itemManager);
+
+        TextUI ui = new TextUI(pos);
+
+        ui.start();
+    }
+}
diff --git a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/PointOfSale.java b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/PointOfSale.java
index 990a635..dfac6e1 100644
--- a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/PointOfSale.java
+++ b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/PointOfSale.java
@@ -11,6 +11,10 @@ public class PointOfSale {
 
     private Bill bill;
 
+    public PointOfSale(ItemManager itemManager) {
+        this.itemManager = itemManager;
+    }
+
     public Bill createNewBill() {
         bill = new Bill();
         return bill;
diff --git a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/TextUI.java b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/TextUI.java
new file mode 100644
index 0000000..056e41e
--- /dev/null
+++ b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/TextUI.java
@@ -0,0 +1,27 @@
+package lk.ac.pdn.ceit.pos;
+
+import lk.ac.pdn.ceit.pos.entities.Bill;
+
+public class TextUI {
+    private PointOfSale pos;
+
+    public TextUI(PointOfSale pos) {
+        this.pos = pos;
+    }
+
+    public void start() {
+        IO.println("POS Started.");
+
+        // Assume a bill should be created.
+        Bill bill = pos.createNewBill();
+
+        // Assume: Create a line item
+        pos.addLineItem("F001", 2);
+
+        pos.addLineItem("F002", 3);
+
+        // ...
+
+        // Print bill 
+    }
+}
diff --git a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/Bill.java b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/Bill.java
index 0c2ff5f..ad6a87e 100644
--- a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/Bill.java
+++ b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/Bill.java
@@ -1,9 +1,10 @@
 package lk.ac.pdn.ceit.pos.entities;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class Bill {
-    private List<LineItem> lineItems;
+    private List<LineItem> lineItems = new ArrayList<>();
 
     public List<LineItem> getLineItems() {
         return lineItems;
diff --git a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/item/InMemoryItemManager.java b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/item/InMemoryItemManager.java
new file mode 100644
index 0000000..00bc835
--- /dev/null
+++ b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/item/InMemoryItemManager.java
@@ -0,0 +1,43 @@
+package lk.ac.pdn.ceit.pos.item;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import lk.ac.pdn.ceit.pos.entities.Item;
+
+public class InMemoryItemManager implements ItemManager {
+
+    // Assume this is the item storage
+    private Map<String, Item> items = new HashMap<>();
+
+    // Initial set of data for demo purposes
+    public InMemoryItemManager() {
+        this.create("Dhal", "F001", 300.00);
+        this.create("Bread", "F002", 180.00);
+        this.create("Sunlight Soap", "S001", 150.00);
+    }
+
+    @Override
+    public Item findById(String id) {
+        return items.get(id);
+    }
+
+    @Override
+    public List<Item> searchByName(String word) {
+        // TODO Auto-generated method stub
+        throw new UnsupportedOperationException("Unimplemented method 'searchByName'");
+    }
+
+    @Override
+    public Item create(String name, String id, double unitPrice) {
+        // Create a new Item
+        Item item = new Item(name, id, unitPrice);
+
+        // Add to storage
+        items.put(id, item);
+
+        return item;
+    }
+
+}