/*
 * ========================
 * =====    ===============
 * ======  ================
 * ======  ================
 * ======  ====   ====   ==
 * ======  ===     ==  =  =
 * ======  ===  =  ==     =
 * =  ===  ===  =  ==  ====
 * =  ===  ===  =  ==  =  =
 * ==     =====   ====   ==
 * ========================
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2023 Joe
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the organization nor the
 *    names of its contributors may be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY JOE ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL JOE BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * hardflip: src/c_ldirs.go
 * Tue Dec 26 11:09:27 2023
 * Joe
 *
 * the directories linked list
 */

package main

type DirsNode struct {
	ID     uint64
	Name   string
	Parent *DirsNode
	Depth  uint16
	lhost  *HostList
	next   *DirsNode
}

type DirsList struct {
	head *DirsNode
}

// adds a directory node to the list
func (ldirs *DirsList) add_back(node *DirsNode) {
	new_node := node

	if ldirs.head == nil {
		ldirs.head = new_node
		return
	}
	curr := ldirs.head
	for curr.next != nil {
		curr = curr.next
	}
	curr.next = new_node
}

// return the list node with the according id
func (ldirs *DirsList) sel(id uint64) *DirsNode {
	curr := ldirs.head

	if curr == nil {
		return nil
	}
    for curr.next != nil && curr.ID != id {
        curr = curr.next
    }
	if curr.ID != id {
		return nil
	}
	return curr
}

// returns a string with the full path of the dir
func (ldirs *DirsList) path(node *DirsNode) string {
	var path string

	if node == nil {
		return ""
	}
	curr := node
	for curr != nil {
		path = curr.Name + "/" + path
		curr = curr.Parent
	}
	return path
}