//
//  ParentViewProtocol.swift
//  VDS
//
//  Created by Matt Bruce on 8/23/24.
//

import Foundation


/// This is used in a View or Control to denote subviews of the ViewProtocol
/// type, more or less for composite views/controls.
public protocol ParentViewProtocol: ViewProtocol {
    var children: [any ViewProtocol] { get }
}

extension ParentViewProtocol {
    
    /// This will get all of the children for yourself as well as all
    /// of the children within the full tree hierarchy.
    /// - Returns: All children within the hierachy
    public func getAllChildren() -> [any ViewProtocol] {
        var allChildren = [any ViewProtocol]()
        
        func traverse(view: any ViewProtocol) {
            if let parentView = view as? any ParentViewProtocol {
                for child in parentView.children {
                    allChildren.append(child)
                    traverse(view: child)
                }
            }
        }
        
        traverse(view: self)
        return children
    }
}