Joory Altuwaijri

src/task.dart

@@ -0,0 +1,22 @@
+
+
+
+class Task {
+
+    int ID;
+    String Title;
+    String Description;
+    bool isCompleted;
+
+    Task({required this.ID, required this.Title, required this.Description, required this.isCompleted});
+
+    factory Task.create() {
+
+      return Task(ID: 0, Title: '', Description: '', isCompleted: false);
+
+    }
+}
+
+
+
+

src/task_list.dart

@@ -0,0 +1,165 @@
+import 'dart:io';
+import 'task.dart';
+
+List<Task> all_tasks = [];
+
+void add() {
+  late Task new_task = Task.create();
+
+  new_task.ID = all_tasks.length;
+
+  do {
+    stdout.write('task title: ');
+    new_task.Title = stdin.readLineSync()!;
+  } while (new_task.Title == '');
+
+  do {
+    stdout.write('task description: ');
+    new_task.Description = stdin.readLineSync()!;
+  } while (new_task.Description == '');
+
+  all_tasks.add(new_task);
+
+  print('The task has been added successfully!');
+  main();
+}
+
+void remove() {
+  try {
+    stdout.write('Please enter the ID of the task you want to remove: ');
+    int task_id = int.parse(stdin.readLineSync()!);
+
+    all_tasks.remove(all_tasks[task_id]);
+
+    print('The task has been removed successfully!');
+
+    main();
+  } catch (e) {
+    print('Please enter valid ID');
+    remove();
+  }
+}
+
+void update() {
+  try {
+    stdout.write('Please enter the ID of the task you want to update: ');
+    int task_id = int.parse(stdin.readLineSync()!);
+
+    Task the_task = all_tasks[task_id];
+
+    stdout.write('What do you want to update (title, description, completed)?');
+    String? field = stdin.readLineSync()!;
+
+    field.toLowerCase();
+
+    if (field == 'title') {
+      do {
+        stdout.write('Enter new title please: ');
+        the_task.Title = stdin.readLineSync()!;
+      } while (the_task.Title == '');
+    } else if (field == 'description') {
+      do {
+        stdout.write('Enter new description please: ');
+        the_task.Description = stdin.readLineSync()!;
+      } while (the_task.Description == '');
+    } else if (field == 'completed') {
+      the_task.isCompleted = !(the_task.isCompleted);
+    } else {
+      print('Please select a valid field');
+    }
+
+    print('The task has been updated successfully!');
+    main();
+  } catch (e) {
+    print('Please enter valid ID');
+    update();
+  }
+}
+
+void printRow(List<String> row, List<int> columnWidths) {
+  for (int i = 0; i < row.length; i++) {
+    String cell = row[i];
+    String padding = ' ' * (columnWidths[i] - cell.length);
+    stdout.write('| $cell$padding ');
+  }
+  stdout.write('|\n');
+}
+
+void printSubheadings(List<int> columnWidths) {
+  stdout.write('+' +
+      ('-' *
+          (columnWidths.reduce((a, b) => a + b) +
+              3 * columnWidths.length -
+              1)) +
+      '+');
+  stdout.write('\n');
+}
+
+void view() {
+  try {
+    List<List<String>> tasks = [];
+    List<String> sub_headings = ['ID', 'Title', 'Description', 'Completed'];
+    tasks.add(sub_headings);
+
+    for (var i = 0; i < all_tasks.length; i++) {
+      Task task = all_tasks[i];
+      List<String> single_task = [
+        task.ID.toString(),
+        task.Title.toString(),
+        task.Description.toString(),
+        task.isCompleted.toString()
+      ];
+      tasks.add(single_task);
+    }
+
+    List<int> columnWidths = List.generate(tasks[0].length, (index) => 0);
+
+    for (var row in tasks) {
+      for (int i = 0; i < row.length; i++) {
+        if (row[i].length > columnWidths[i]) {
+          columnWidths[i] = row[i].length;
+        }
+      }
+    }
+
+    // Print the table headings
+    printRow(tasks[0], columnWidths);
+
+    // Print the subheadings
+    printSubheadings(columnWidths);
+
+    // Print the table rows
+    for (int i = 1; i < tasks.length; i++) {
+      printRow(tasks[i], columnWidths);
+    }
+
+    main();
+  } catch (e) {
+    print('You dont have any tasks yet!');
+    main();
+  }
+}
+
+void main() {
+  print('Welcome to the task tracker app!');
+  stdout.write(
+      'Choose action: (Add) || (Remove) || (Update) || (View) || (Stop)\n');
+  String? action = stdin.readLineSync()!;
+
+  action.toLowerCase();
+
+  if (action == 'add') {
+    add();
+  } else if (action == 'Remove') {
+    remove();
+  } else if (action == 'update') {
+    update();
+  } else if (action == 'view') {
+    view();
+  } else if (action == 'stop') {
+    return;
+  } else {
+    print('Please select a valid action');
+    main();
+  }
+}