diff --git a/src/main/java/Main.java b/src/main/java/Main.java index 148a46e..4c32b6b 100644 --- a/src/main/java/Main.java +++ b/src/main/java/Main.java @@ -6,41 +6,53 @@ import java.util.Scanner; public class Main { static ArrayList productCatalog = new ArrayList<>(); - public static void loadProducts() throws IOException{ - InputStream input = Main.class - .getClassLoader() - .getResourceAsStream("products.csv"); - if (input == null) { - throw new IOException("products.csv not found"); - } - Scanner scanner = new Scanner(input); - // TODO: - // - Read each line from products.csv - // - For each line, parse productId, name, and price - // - The format of the file is like this: - // [productId],[name],[price] - // - Store Product objects in the productCatalog ArrayList - - // NOTE - // - The data in products.csv is guaranteed to be valid. - } - - public static void main(String[] args) - { + public static void main(String[] args) { try { loadProducts(); } catch (IOException e) { - System.err.println("Error reading products"); - System.out.println("Terminating the program..."); + System.err.println("Error reading products: " + e.getMessage()); + System.err.println("Terminating the program..."); return; } - System.out.println("=== Products loaded"); - ReportGenerator reportGenerator = new ReportGenerator("2025_order_details.csv", Collections.unmodifiableList(productCatalog)); - reportGenerator.processFile(); - System.out.println("=== Order file processed"); - reportGenerator.saveReport(); - System.out.println("=== Report saved as report.txt"); + System.out.println("=== Products loaded ==="); + + ReportGenerator generator = new ReportGenerator("2025_order_details.csv", Collections.unmodifiableList(productCatalog)); + + System.out.println("Processing orders..."); + generator.processFile(); + + System.out.println("Saving report..."); + generator.saveReport(); + + System.out.println("Done!"); + } + + private static void loadProducts() throws IOException { + InputStream inputStream = Main.class.getClassLoader().getResourceAsStream("products.csv"); + if (inputStream == null) { + throw new IOException("products.csv not found"); + } + + try (Scanner scanner = new Scanner(inputStream)) { + // خواندن خط به خط فایل محصولات + while (scanner.hasNextLine()) { + String line = scanner.nextLine().trim(); + // نادیده گرفتن خطوط خالی یا هدر (در صورت وجود) + if (line.isEmpty() || line.toLowerCase().startsWith("productid")) { + continue; + } + + String[] parts = line.split(","); + if (parts.length >= 3) { + int id = Integer.parseInt(parts[0].trim()); + String name = parts[1].trim(); + double price = Double.parseDouble(parts[2].trim()); + + productCatalog.add(new Product(id, name, price)); + } + } + } } } diff --git a/src/main/java/ReportGenerator.java b/src/main/java/ReportGenerator.java index 8eb458b..fab6252 100644 --- a/src/main/java/ReportGenerator.java +++ b/src/main/java/ReportGenerator.java @@ -1,83 +1,98 @@ +import java.io.BufferedReader; +import java.io.BufferedWriter; +import java.io.FileReader; +import java.io.FileWriter; +import java.io.IOException; import java.util.List; public class ReportGenerator { - private final String ordersFilePath; private final List productList; - private double totalFinalCost; - private int totalQuantity; - private double totalDiscountValue; - private int totalInvalidLines; + private double totalFinalCost = 0.0; + private int totalQuantity = 0; + private double totalDiscountValue = 0.0; + private int totalInvalidLines = 0; public ReportGenerator(String ordersFilePath, List productList) { this.ordersFilePath = ordersFilePath; this.productList = productList; } - public void processFile() - { - // TODO: - // 1. Open the order details CSV file - // 2. Read the file line by line - // 3. Split each line using comma delimiter - // (each line is guaranteed to contain exactly two commas) - // 4. Each line contains exactly 3 values in the format: - // [productId],[quantity],[discountPercent] - // 5. Attempt to convert values: - // - productId -> int - // - quantity -> int - // - discountPercent -> int - // NOTE: - // - quantity and discountPercent may contain invalid characters - // (e.g., letters instead of numbers). - // - If parsing any value fails (NumberFormatException), - // the entire line must be considered invalid. - // - Use try-catch blocks and exception handling to safely - // handle parsing and validation errors without stopping - // the processing of the remaining lines. - // 6. Validate parsed values: - // - productId must be greater than 0 - // - quantity must be greater than 0 - // - discountPercent must be between 0 and 99 inclusive - // 7. Look for a Product in productList that matches productId - // 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 - // discountValue = subtotal * discountPercent / 100 - // finalCost = subtotal - discountValue - // 10. Update report totals: - // - totalQuantity += quantity - // - totalFinalCost += finalCost - // - totalDiscountValue += discountValue - // 11. If any parsing error, validation failure, or missing product occurs: - // - increment totalInvalidLines - // - skip the line and continue processing the next line - // 12. Close all file resources + public void processFile() { + + try (BufferedReader br = new BufferedReader(new FileReader(ordersFilePath))) { + String line; + while ((line = br.readLine()) != null) { + line = line.trim(); + if (line.isEmpty() || line.toLowerCase().startsWith("productid")) { + continue; + } + + String[] parts = line.split(","); + if (parts.length < 3) { + totalInvalidLines++; + continue; + } + + try { + + int productId = Integer.parseInt(parts[0].trim()); + int quantity = Integer.parseInt(parts[1].trim()); + int discountPercent = Integer.parseInt(parts[2].trim()); + + + if (productId <= 0 || quantity <= 0 || discountPercent < 0 || discountPercent > 99) { + totalInvalidLines++; + continue; + } + + + Product matchedProduct = null; + for (Product product : productList) { + if (product.getProductID() == productId) { + matchedProduct = product; + break; + } + } + + if (matchedProduct == null) { + totalInvalidLines++; + continue; // محصول یافت نشد + } + + double subtotal = quantity * matchedProduct.getPrice(); + double discountValue = subtotal * (discountPercent / 100.0); + double finalCost = subtotal - discountValue; + + + totalQuantity += quantity; + totalDiscountValue += discountValue; + totalFinalCost += finalCost; + + } catch (NumberFormatException e) { + + totalInvalidLines++; + } + } + } catch (IOException e) { + System.err.println("Error reading orders file: " + e.getMessage()); + } } - public void saveReport() - { - // TODO: - // 1. Build a formatted report string - // 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 + public void saveReport() { - /* Example Structure - ========= SALES REPORT ========= - Total Quantity Sold: 42 - Total Final Cost: $1520.75 - Total Discount Value: $230.50 - Invalid Rows: 3 - ================================ - */ + try (BufferedWriter bw = new BufferedWriter(new FileWriter("report.txt"))) { + bw.write("========= SALES REPORT =========\n"); + bw.write("Total Quantity Sold: " + totalQuantity + "\n"); + // استفاده از String.format برای نمایش دو رقم اعشار + bw.write(String.format("Total Final Cost: $%.2f\n", totalFinalCost)); + bw.write(String.format("Total Discount Value: $%.2f\n", totalDiscountValue)); + bw.write("Invalid Rows: " + totalInvalidLines + "\n"); + bw.write("================================\n"); + + } catch (IOException e) { + System.err.println("Error saving report: " + e.getMessage()); + } } -} \ No newline at end of file +}