/// <summary>
/// Updates a regular "Plan to X" menu : text, tag, enable/disable.
/// </summary>
/// <param name="plan">The plan.</param>
/// <param name="menu">The menu.</param>
/// <param name="skill">The skill.</param>
/// <param name="level">The level.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">menu
/// or
/// plan</exception>
public static bool UpdatesRegularPlanToMenu(this Plan plan, ToolStripItem menu, Skill skill, int level)
{
menu.ThrowIfNull(nameof(menu));
plan.ThrowIfNull(nameof(plan));
menu.Text = level == 0 ? "Remove" : $"Level {level}";
menu.Enabled = plan.EnablePlanTo(skill, level);
if (menu.Enabled)
{
IPlanOperation operation = plan.TryPlanTo(skill, level);
menu.Tag = operation;
if (RequiresWindow(operation))
menu.Text += @"...";
}
ToolStripMenuItem menuItem = menu as ToolStripMenuItem;
if (menuItem != null)
menuItem.Checked = plan.GetPlannedLevel(skill) == level;
return menu.Enabled;
}