Talyia Mira

src/task.dart

@@ -0,0 +1,116 @@
+import 'dart:io';
+
+class Task {
+  int id;
+  String? title;
+  String? description;
+  bool isCompleted;
+
+  Task(this.id, this.title, this.description, this.isCompleted);
+}
+
+class TaskManager {
+  List<Task> tasks = [];
+  int id = 1;
+
+  //Add tasks
+  void addTask(String? title, String? description, bool isCompleted) {
+    tasks.add(Task(id, title, description,
+        isCompleted)); //takes constructor/object as a input
+
+    id++;
+
+    print("Task successfully added.");
+    print("\n****************************************");
+  }
+
+  //Display tasks
+  void display() {
+    print("\n**************Display tasks***************");
+    if (tasks.isNotEmpty) {
+      for (int i = 0; i < tasks.length; i++) {
+        Task task = tasks[i];
+        print(
+            "Task ID: ${task.id}\nTask name: ${task.title}\nTask Description: ${task.description}\nTask completed: ${task.isCompleted}");
+        print("\n*****************************************");
+      }
+    } else {
+      print("No tasks present.");
+      print("\n*******************************************");
+    }
+  }
+
+  //Delete tasks
+  void delete(taskid) {
+    print("\n**************Delete Task**************");
+    if (tasks.isNotEmpty) {
+      for (int i = 0; i < tasks.length; i++) {
+        Task task = tasks[i];
+        if (task.id == taskid) {
+          tasks.removeAt(i);
+          print("Task Removed Successfully.");
+          print("\n***************************************");
+          break;
+        } else if (i == tasks.length - 1) {
+          print("ID not present.");
+          print("\n***************************************");
+        }
+      }
+    } else {
+      print("No Task to delete.");
+      print("\n***************************************");
+    }
+  }
+
+  //Update tasks
+  void update(taskid) {
+    print("*****************Update Task*****************\n");
+    if (tasks.isNotEmpty) {
+      for (int i = 0; i < tasks.length; i++) {
+        Task task = tasks[i];
+        if (task.id == taskid) {
+          print("What do you want to update:");
+          print("1)Title\n2)Description\n3)Status");
+          int? option = int.tryParse(stdin.readLineSync() ?? '0');
+          if (option == 1) {
+            print("Please enter the new title: ");
+            String? t = stdin.readLineSync();
+            task.title = t;
+            print("Title of task updated successfully.");
+            print("\n*********************************************");
+          } else if (option == 2) {
+            print("Please enter the new description: ");
+            String? d = stdin.readLineSync();
+            task.description = d;
+            print("Description of task updated successfully.");
+            print("\n*********************************************");
+          } else if (option == 3) {
+            print("Please enter the new status: ");
+            String? c = stdin.readLineSync();
+            if (c == 'True' || c == 'true' || c == 'T' || c == 't') {
+              task.isCompleted = true;
+              print("Status of task updated successfully.");
+              print("\n*********************************************");
+            } else if (c == 'False' || c == 'false' || c == 'F' || c == 'f') {
+              task.isCompleted = false;
+              print("Status of task updated successfully.");
+              print("\n*********************************************");
+            } else {
+              print("Please enter a correct status.");
+              print("\n*********************************************");
+            }
+          } else {
+            print("Please enter a valid option to update.");
+            print("\n*********************************************");
+          }
+        } else if (i == tasks.length - 1) {
+          print("ID not present.");
+          print("\n*********************************************");
+        }
+      }
+    } else {
+      print("No Task to update");
+      print("\n*********************************************");
+    }
+  }
+}

src/task_list.dart

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+import 'task.dart';
+import 'dart:io';
+
+/*Implement a menu-driven interface that allows users to 
+add, view, update, and delete tasks using the Task class.*/
+void main() {
+  TaskManager manager = new TaskManager();
+  do {
+    print("\n*********Welcome to Task Management System*********\n");
+    stdout.write(
+        'Please choose an option from the menu:\n1)Add Task\n2)View Task\n3)Delete Task\n4)Update Task\n0)To Exit\n');
+
+    int? option = int.tryParse(stdin.readLineSync() ?? '0');
+
+    if (option == 1) {
+      print("\n****************Add Task****************\n");
+      stdout.write("Please enter Task name: ");
+      String? name = stdin.readLineSync();
+
+      stdout.write("Please enter Task description: ");
+      String? description = stdin.readLineSync();
+
+      stdout.write("Is the task completed? (True/False): ");
+      String? status = stdin.readLineSync();
+
+      if (status == 'True' ||
+          status == 'true' ||
+          status == 'T' ||
+          status == 't') {
+        manager.addTask(name, description, true);
+      } else if (status == 'False' ||
+          status == 'false' ||
+          status == 'F' ||
+          status == 'f') {
+        manager.addTask(name, description, false);
+      } else {
+        print("Please enter a valid status");
+        print("\n****************************************");
+      }
+    } else if (option == 2) {
+      manager.display();
+    } else if (option == 3) {
+      print("\nPlease enter the ID of the task you wish to delete: ");
+      int? id = int.tryParse(stdin.readLineSync() ?? '0');
+      manager.delete(id);
+    } else if (option == 4) {
+      print("\nPlease enter the ID of the task you want to update:");
+      int? id = int.tryParse(stdin.readLineSync() ?? '0');
+      if (id == null) {
+        print("\nPlease enter a number.");
+      } else {
+        manager.update(id);
+      }
+    } else {
+      exit(0);
+    }
+  } while (true);
+}

src/variables.dart

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+//import 'task.dart';
+import 'dart:io';
+
+void main() {
+  //declare and initialize variables
+
+  int number = 50;
+  String name = "Talyia";
+  bool isSmart = true;
+  List<String> colors = ["Red", "Blue", "Pink", "Purple"];
+  List<Map<int, String>> id_name = [
+    {1: "Talyia"},
+    {2: "Ryam"}
+  ];
+
+  print('Number: $number');
+  print('Name: $name');
+  print('Smart?: $isSmart');
+  print('Color: $colors');
+  print('Id with name: $id_name');
+
+//Error Handling
+
+  try {
+    int result = 10 ~/ 0;
+    print('Result: $result');
+  } catch (e) {
+    print("An error occurred: $e");
+  }
+
+//take input from user
+  stdout.write('Enter your name: ');
+  String? name2 = stdin.readLineSync();
+  print('Hello $name2!');
+//take input from user as int
+  stdout.write('Enter your age: ');
+  int? age = int.tryParse(stdin.readLineSync()!) ?? 0;
+  print('Age: $age');
+}