import 'dart:io'; import 'dart_tutorial/addressbook.pb.dart'; // This function fills in a Person message based on user input. Person promptForAddress() { Person person = Person(); print('Enter person ID: '); String input = stdin.readLineSync(); person.id = int.parse(input); print('Enter name'); person.name = stdin.readLineSync(); print('Enter email address (blank for none) : '); String email = stdin.readLineSync(); if (email.isNotEmpty) { person.email = email; } while (true) { print('Enter a phone number (or leave blank to finish): '); String number = stdin.readLineSync(); if (number.isEmpty) break; Person_PhoneNumber phoneNumber = Person_PhoneNumber(); phoneNumber.number = number; print('Is this a mobile, home, or work phone? '); String type = stdin.readLineSync(); switch (type) { case 'mobile': phoneNumber.type = Person_PhoneType.MOBILE; break; case 'home': phoneNumber.type = Person_PhoneType.HOME; break; case 'work': phoneNumber.type = Person_PhoneType.WORK; break; default: print('Unknown phone type. Using default.'); } person.phones.add(phoneNumber); } return person; } // Reads the entire address book from a file, adds one person based // on user input, then writes it back out to the same file. main(List arguments) { if (arguments.length != 1) { print('Usage: add_person ADDRESS_BOOK_FILE'); exit(-1); } File file = File(arguments.first); AddressBook addressBook; if (!file.existsSync()) { print('File not found. Creating new file.'); addressBook = AddressBook(); } else { addressBook = AddressBook.fromBuffer(file.readAsBytesSync()); } addressBook.people.add(promptForAddress()); file.writeAsBytes(addressBook.writeToBuffer()); }