Mobile phone shop report work

src/main/java/Main.java

@@ -15,15 +15,15 @@ public class Main {
         }
         Scanner scanner = new Scanner(input);
 
-        // TODO:
+        while (scanner.hasNextLine()){
-        // - Read each line from products.csv
+            String line = scanner.nextLine();
-        // - For each line, parse productId, name, and price
+            String[] part = line.split(",");
-        // - The format of the file is like this:
+            int productId = Integer.parseInt(part[0]);
-        //      [productId],[name],[price]
+            String name = part[1];
-        // - Store Product objects in the productCatalog ArrayList
+            double price = Double.parseDouble(part[2]);
+            productCatalog.add(new Product(productId, name, price));
+        }
 
-        // NOTE
-        // - The data in products.csv is guaranteed to be valid.
     }
 
     public static void main(String[] args)

src/main/java/ReportGenerator.java

@@ -1,4 +1,9 @@
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.InputStream;
+import java.io.PrintWriter;
 import java.util.List;
+import java.util.Scanner;
 
 public class ReportGenerator {
 
@@ -17,67 +22,63 @@ public class ReportGenerator {
 
     public void processFile()
     {
-        // TODO:
+        InputStream input = getClass().getResourceAsStream(ordersFilePath);
-        // 1. Open the order details CSV file
+        if (input == null){
-        // 2. Read the file line by line
+            totalInvalidLines++;
-        // 3. Split each line using comma delimiter
+            return;
-        //      (each line is guaranteed to contain exactly two commas)
+        }
-        // 4. Each line contains exactly 3 values in the format:
+        Scanner scanner = new Scanner(input);
-        //      [productId],[quantity],[discountPercent]
+        while (scanner.hasNextLine()){
-        // 5. Attempt to convert values:
+            String line = scanner.nextLine();
-        //      - productId -> int
+            String[] part = line.split(",");
-        //      - quantity -> int
+            try {
-        //      - discountPercent -> int
+                int productId = Integer.parseInt(part[0]);
-        //    NOTE:
+                int quantity = Integer.parseInt(part[1]);
-        //      - quantity and discountPercent may contain invalid characters
+                int discountPercent = Integer.parseInt(part[2]);
-        //        (e.g., letters instead of numbers).
+
-        //      - If parsing any value fails (NumberFormatException),
+                if(productId <= 0 || quantity <= 0 || discountPercent < 0 || discountPercent > 99){
-        //        the entire line must be considered invalid.
+                    totalInvalidLines++;
-        //      - Use try-catch blocks and exception handling to safely
+                    continue;
-        //        handle parsing and validation errors without stopping
+                }
-        //        the processing of the remaining lines.
+
-        // 6. Validate parsed values:
+                Product foundProduct = null ;
-        //      - productId must be greater than 0
+                for (Product p : productList){
-        //      - quantity must be greater than 0
+                    if(p.getProductID() == productId){
-        //      - discountPercent must be between 0 and 99 inclusive
+                        foundProduct = p;
-        // 7. Look for a Product in productList that matches productId
+                        break;
-        // 8. If no Product with that ID exists in the catalog,
+                    }
-        //      the entire line is considered invalid
+                }
-        // 9. If all values are valid and the product exists, calculate:
+
-        //      subtotal = quantity * product price
+                if(foundProduct == null){
-        //      discountValue = subtotal * discountPercent / 100
+                    totalInvalidLines++;
-        //      finalCost = subtotal - discountValue
+                    continue;
-        // 10. Update report totals:
+                }
-        //      - totalQuantity += quantity
+                double price = foundProduct.getPrice();
-        //      - totalFinalCost += finalCost
+                double subtotal = quantity * price;
-        //      - totalDiscountValue += discountValue
+                double discountValue = subtotal * discountPercent / 100;
-        // 11. If any parsing error, validation failure, or missing product occurs:
+                double finalCost = subtotal - discountValue;
-        //      - increment totalInvalidLines
+
-        //      - skip the line and continue processing the next line
+                totalQuantity += quantity;
-        // 12. Close all file resources
+                totalFinalCost += finalCost;
+                totalDiscountValue += discountValue;
+
+            }catch (NumberFormatException e){
+                totalInvalidLines++;
+                continue;
+            }
+        }
+        scanner.close();
     }
 
     public void saveReport()
     {
-        // TODO:
+        String report = "=========Report=========\n" + "Total quantity : " + totalQuantity + "\n" + "Total final cost : " + totalFinalCost + "\n" +
-        // 1. Build a formatted report string
+                "Total discount value : " + totalDiscountValue + "\n" + "Total invalid lines : " + totalInvalidLines + "\n";
-        // 2. Include:
-        //      - total quantity
-        //      - total final cost
-        //      - total discount value
-        //      - total invalid lines
-        // 3. Create/open output report file (name it report.txt)
-        // 4. Write report string into file
-        // 5. Handle file writing exceptions
-        // 6. Close writer resources
 
-        /* Example Structure
+        try (PrintWriter writer = new PrintWriter(new File("report.txt"))){
-        ========= SALES REPORT =========
+            writer.print(report);
-        Total Quantity Sold: 42
+        } catch (FileNotFoundException e) {
-        Total Final Cost: $1520.75
+            System.err.println("Error creating report file: " + e.getMessage());
-        Total Discount Value: $230.50
+        }
-        Invalid Rows: 3
-        ================================
-        */
     }
 }