private static void SearchInternal(Graph graph, IVertex vertex, GraphSearchResult result)
{
result.MarkAsVisited(vertex);
foreach (var edge in vertex.Edges)
{
if (!result.IsVisited(edge.U))
{
SearchInternal(graph, edge.U, result);
}
}
}
public static GraphSearchResult Search(Graph graph, IVertex source, IVertex target)
{
if (graph is null)
{
throw new ArgumentNullException(nameof(graph));
}
if (source is null)
{
throw new ArgumentNullException(nameof(source));
}
if (target is null)
{
throw new ArgumentNullException(nameof(target));
}
var result = new GraphSearchResult(graph.Count);
var queue = new Queue <IVertex>(graph.Count);
result.MarkAsVisited(source);
queue.Enqueue(source);
while (queue.Count > 0)
{
var vertex = queue.Dequeue();
if (vertex == target)
{
break;
}
foreach (var edge in vertex.Edges)
{
if (!result.IsVisited(edge.U))
{
result.MarkAsVisited(edge.U);
queue.Enqueue(edge.U);
}
}
}
return(result);
}