gaemstone/src/gaemstone.SourceGen/Structure/BaseInfo.cs

using System.Collections.Generic;
using System.Linq;
using gaemstone.SourceGen.Utility;
using Microsoft.CodeAnalysis;

namespace gaemstone.SourceGen.Structure;

public abstract class BaseInfo
{
	public ISymbol Symbol { get; }

	public BaseEntityInfo? Parent { get; set; }

	public string Name      => Symbol.Name;
	public string FullName  => Symbol.GetFullName();
	public string Namespace => Symbol.GetNamespace()!;

	public Location Location => Symbol.Locations.First();
	public List<Diagnostic> Diagnostics { get; } = new();
	public bool IsErrored => Diagnostics.Any(d => d.Severity == DiagnosticSeverity.Error);

	public BaseInfo(ISymbol symbol) => Symbol = symbol;

	public void Validate()
	{
		// All of the children are validated before the parent is,
		// in case their state affects the parent in some way.
		foreach (var child in GetChildren())
			child.Validate();
		foreach (var diag in ValidateSelf())
			Diagnostics.Add(diag);
	}

	protected virtual IEnumerable<BaseInfo> GetChildren() => Enumerable.Empty<BaseInfo>();
	protected abstract IEnumerable<Diagnostic> ValidateSelf();

	protected bool Has(string name)
		=> Get(name) != null;

	protected AttributeData? Get(string name)
		=> Symbol.GetAttributes().FirstOrDefault(attr =>
			RelevantSymbolReceiver.ToRelevantAttributeName(attr.AttributeClass!) == name);
}