/// <summary>
/// Builds an instance of PackageGraph using provided information.
/// </summary>
/// <returns><see cref="PackageGraph"/>.</returns>
public PackageGraph Build()
{
var nodes = new List <PackageGraphNode>();
foreach (var package in _packages)
{
var packageId = package.Key;
var packageNode = nodes.FirstOrDefault(x => x.Package.IsSamePackage(packageId));
if (packageNode == null)
{
packageNode = new PackageGraphNode(packageId);
nodes.Add(packageNode);
}
foreach (var dependencyId in package.Value)
{
var depPackageNode = nodes.FirstOrDefault(x => x.Package.IsSamePackage(dependencyId));
if (depPackageNode == null)
{
depPackageNode = new PackageGraphNode(dependencyId);
nodes.Add(depPackageNode);
}
packageNode.AddDependency(depPackageNode);
}
}
return(new PackageGraph(nodes.Where(x => x.Dependents.Count == 0).ToList(), nodes.Count));
}
/// <summary>
/// Adds a dependency for the node.
/// </summary>
/// <param name="dependency">New dependency.</param>
public void AddDependency(PackageGraphNode dependency)
{
_dependencies.Add(dependency);
dependency._dependents.Add(this);
}