chapter-organizer/Core/Services/NoteNamingService.cs

namespace Core.Services;

/// <summary>
/// Implementation of INoteNamingService that provides note naming conventions.
/// Uses "#" as the prefix for page notes and meeting notes.
/// </summary>
public class NoteNamingService : INoteNamingService
{
    private const string PageNotePrefix = "#";
    private const string MeetingNotePrefix = "#Meeting Notes";
    private const string StudentNotePrefix = "#Student:";

    /// <inheritdoc/>
    public string GetMeetingNoteTitle(DateTime meetingDate)
    {
        return $"{MeetingNotePrefix} {meetingDate:MM/dd/yyyy}";
    }

    /// <inheritdoc/>
    public string GetPageNoteTitle(string pageIdentifier)
    {
        if (string.IsNullOrWhiteSpace(pageIdentifier))
        {
            throw new ArgumentException("Page identifier cannot be null or empty", nameof(pageIdentifier));
        }

        return $"{PageNotePrefix}{pageIdentifier}";
    }

    /// <inheritdoc/>
    public bool IsPageNote(string noteTitle)
    {
        if (string.IsNullOrWhiteSpace(noteTitle))
        {
            return false;
        }

        return noteTitle.StartsWith(PageNotePrefix, StringComparison.Ordinal);
    }

    /// <inheritdoc/>
    public bool IsMeetingNote(string noteTitle)
    {
        if (string.IsNullOrWhiteSpace(noteTitle))
        {
            return false;
        }

        return noteTitle.StartsWith(MeetingNotePrefix, StringComparison.Ordinal);
    }

    /// <inheritdoc/>
    public string GetStudentNoteTitle(int studentId) => $"{StudentNotePrefix}{studentId}";

    /// <inheritdoc/>
    public bool IsStudentNote(string? noteTitle)
    {
        if (string.IsNullOrWhiteSpace(noteTitle))
            return false;

        return noteTitle.StartsWith(StudentNotePrefix, StringComparison.Ordinal);
    }

    /// <inheritdoc/>
    public bool TryParseStudentNoteId(string? noteTitle, out int studentId)
    {
        studentId = 0;
        if (!IsStudentNote(noteTitle))
            return false;

        return int.TryParse(noteTitle.AsSpan(StudentNotePrefix.Length), out studentId);
    }
}