Zip My Code

using System;
using ZipMyCode.Properties;
using ZipMyCode.Service.Tasks;
using ZipMyCode.UI.Mvvm;

namespace ZipMyCode.UI.Task
{
	/// <summary>
	/// Class acting as ViewModel for a ITask.
	/// </summary>
	class TaskViewModel : ViewModelBase
	{
		private readonly ITask task;


		public TaskViewModel(ITask task)
		{
			if (task == null) throw new ArgumentNullException("task");

			this.task = task;
		}


		/// <summary>
		/// Gets the name of the task.
		/// </summary>
		public string Name
		{
			get { return task.Name; }
		}


		/// <summary>
		/// Gets or sets the status of the task.
		/// </summary>
		public TaskStatus Status
		{
			get { return Property(() => Status); }
			set
			{
				Property(() => Status, value);

				// Trigger depending properties
				OnPropertyChanged(() => StatusText);
				OnPropertyChanged(() => StatusIcon);
			}
		}


		/// <summary>
		/// Gets the status text.
		/// </summary>
		public string StatusText
		{
			get
			{
				switch (Status)
				{
					case TaskStatus.Idle:
						return Resources.TaskViewModel_Idle;

					case TaskStatus.Running:
						return Resources.TaskViewModel_Running;

					case TaskStatus.Finished:
						return Resources.TaskViewModel_Successful;

					case TaskStatus.FinishedWithError:
						return Resources.TaskViewModel_Unsuccessful;

					case TaskStatus.Skipped:
						return Resources.TaskViewModel_Skipped;

					default:
						throw new InvalidOperationException("Unsupported status: " + Status);
				}
			}
		}


		/// <summary>
		/// Gets the status icon.
		/// </summary>
		public Uri StatusIcon
		{
			get
			{
				switch (Status)
				{
					case TaskStatus.Idle:
						return new Uri("pack://application:,,,/ZipMyCode;component/Resources/TaskIdle.png");

					case TaskStatus.Running:
						return new Uri("pack://application:,,,/ZipMyCode;component/Resources/TaskRunning.png");

					case TaskStatus.Finished:
						return new Uri("pack://application:,,,/ZipMyCode;component/Resources/TaskSuccessful.png");

					case TaskStatus.FinishedWithError:
						return new Uri("pack://application:,,,/ZipMyCode;component/Resources/TaskUnsuccessful.png");

					case TaskStatus.Skipped:
						return new Uri("pack://application:,,,/ZipMyCode;component/Resources/TaskSkipped.png");

					default:
						throw new InvalidOperationException("Unsupported status: " + Status);
				}
			}
		}


		/// <summary>
		/// Runs the task.
		/// </summary>
		/// <returns>true if task was successful; otherwise false.</returns>
		public bool Run()
		{
			// Set "task is running" status
			Status = TaskStatus.Running;

			// Set task outcome
			Status = task.Run();

			return Status == TaskStatus.Finished;
		}
	}
}