completed 03-ticket example

exercises/03_ticket_v1/12_outro/src/lib.rs

@@ -11,3 +11,74 @@
 // Integration here has a very specific meaning: they test **the public API** of your project.
 // You'll need to pay attention to the visibility of your types and methods; integration
 // tests can't access private or `pub(crate)` items.
+
+pub struct Order {
+    product_name: String,
+    quantity: u32,
+    unit_price: u32,
+}
+
+impl Order {
+    fn cName(name: &String) {
+        if name.is_empty() {
+            panic!("Name must be valid");
+        }
+        if name.len() > 300 {
+            panic!("Name too long");
+        }
+    }
+
+    fn cQuantity(quantity: &u32) {
+        if quantity.eq(&0) {
+            panic!("not enough quantity");
+        }
+    }
+
+    fn cPrice(price: &u32) {
+        if price.eq(&0) {
+            panic!("invalid price");
+        }
+    }
+
+    pub fn total(&self) -> u32 {
+        self.unit_price * self.quantity
+    }
+
+    pub fn new(name: String, quantity: u32, price: u32) -> Order {
+        Order::cName(&name);
+        Order::cPrice(&price);
+        Order::cQuantity(&quantity);
+        Order {
+            product_name: name,
+            quantity,
+            unit_price: price,
+        }
+    }
+
+    pub fn product_name(&self) -> String {
+        self.product_name.clone()
+    }
+
+    pub fn quantity(&self) -> &u32 {
+        &self.quantity
+    }
+
+    pub fn unit_price(&self) -> &u32 {
+        &self.unit_price
+    }
+
+    pub fn set_product_name(&mut self, name: String) {
+        Order::cName(&name);
+        self.product_name = name;
+    }
+
+    pub fn set_quantity(&mut self, quantity: u32) {
+        Order::cQuantity(&quantity);
+        self.quantity = quantity;
+    }
+
+    pub fn set_unit_price(&mut self, price: u32) {
+        Order::cPrice(&price);
+        self.unit_price = price;
+    }
+}