/// <summary>
/// Executes the operation and adds it to the operation history.
/// Modifies the task indicated by the index range to the new
/// parameters in this operation. If a parameter is left empty or null,
/// that parameter will remain unchanged in the new task.
/// </summary>
/// <param name="taskList">List of task this operation will operate on.</param>
/// <param name="storageIO">Storage controller that will be used to store neccessary data.</param>
/// <returns>Response indicating the result of the operation execution.</returns>
public override Response Execute(List<Task> taskList, Storage storageIO)
{
SetMembers(taskList, storageIO);
Response response = null;
// No index, do a search instead
if (!hasIndex && !isAll)
{
SetMembers(taskList, storageIO);
List<Task> searchResults = SearchForTasks(taskName, false, startTime, endTime, searchType);
response = DisplaySearchResults(searchResults, taskName, startTime, endTime, searchType);
}
else
{
response = CheckIfIndexesAreValid(startIndex, endIndex);
if (response != null) return response;
if (MultipleTasksSelected())
return new Response(Result.INVALID_TASK, sortType, this.GetType());
oldTask = currentListedTasks[startIndex];
// copy over taskName from indexed task if didn't specify a name
if (!IsValidString(taskName))
taskName = oldTask.TaskName;
// copy over date/times from indexed task if didn't specify time
else if (startTime == null && endTime == null)
oldTask.CopyDateTimes(ref startTime, ref endTime, ref isSpecific);
newTask = Task.CreateNewTask(taskName, startTime, endTime, isSpecific);
response = ModifyTask(oldTask, newTask);
}
if (response.IsSuccessful())
{
AddToOperationHistory();
}
return response;
}
