chapter-organizer/WebApp/Models/CalendarEventItem.cs

using Heron.MudCalendar;
using MudBlazor;

namespace WebApp.Models;

/// <summary>
/// Calendar event item model for Heron.MudCalendar component.
/// Maps from EventOccurrence entity to calendar event format.
/// </summary>
public class CalendarEventItem : CalendarItem
{
    /// <summary>
    /// Gets the original EventOccurrence data.
    /// </summary>
    public Core.Entities.EventOccurrence? EventOccurrenceData { get; set; }

    /// <summary>
    /// Gets the associated EventDefinition if available.
    /// </summary>
    public Core.Entities.EventDefinition? EventDefinition { get; set; }

    /// <summary>
    /// Parameterless constructor required by Heron.MudCalendar component.
    /// </summary>
    public CalendarEventItem()
    {
        // Initialize base class properties to avoid null reference issues
        Text = string.Empty;
        Start = DateTime.MinValue;
        End = DateTime.MinValue;
    }

    public CalendarEventItem(Core.Entities.EventOccurrence occurrence, Core.Entities.EventDefinition? eventDefinition = null)
    {
        // Set base class properties that the calendar component uses
        Text = GetEventTitle(occurrence, eventDefinition);
        Start = occurrence.StartTime;
        End = occurrence.EndTime ?? occurrence.StartTime.AddHours(1);
        this.EventOccurrenceData = occurrence;
        this.EventDefinition = eventDefinition;
    }

    private static string GetEventTitle(Core.Entities.EventOccurrence occurrence, Core.Entities.EventDefinition? eventDefinition)
    {
        var title = occurrence.Name;
        
        if (eventDefinition != null && !string.IsNullOrEmpty(eventDefinition.Name))
        {
            title = $"{eventDefinition.Name} - {title}";
        }

        if (!string.IsNullOrEmpty(occurrence.Location))
        {
            title += $" ({occurrence.Location})";
        }

        return title;
    }
}