TokenCollection.cs

namespace CSharpener;

/// <summary>
/// Typed, queryable collection for Token (IO) work items.
/// Use when you need clean typed access to tokens outside a batch context.
/// </summary>
public sealed class TokenCollection : IReadOnlyList<Token>
{
    private readonly List<Token> _items = new();

    public Token this[int i] => _items[i];
    public int   Count       => _items.Count;

    public IEnumerator<Token> GetEnumerator()           => _items.GetEnumerator();
    System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() => GetEnumerator();

    public void Add(Token token) => _items.Add(token);

    public IEnumerable<Token> Leads               => _items.Where(t => t.Tag.Role == OperationRole.Lead);
    public IEnumerable<Token> Children            => _items.Where(t => t.Tag.Role == OperationRole.Child);
    public IEnumerable<Token> ForGroup(char g)    => _items.Where(t => t.Tag.Group == g);
    public IEnumerable<Token> OnCore(int coreId)  => _items.Where(t => t.Tag.CoreId == coreId);

    public bool AllTerminal => _items.All(t => t.State is WorkState.Resolved or WorkState.Failed);
}