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/*
* Copyright (c) 2022 Vaughn Nugent
*
* Library: VNLib
* Package: VNLib.Plugins.Essentials.Content.Routing
* File: RouteComparer.cs
*
* RouteComparer.cs is part of VNLib.Plugins.Essentials.Content.Routing which is part of the larger
* VNLib collection of libraries and utilities.
*
* VNLib.Plugins.Essentials.Content.Routing is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* VNLib.Plugins.Essentials.Content.Routing is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
using System.Collections.Generic;
using VNLib.Plugins.Essentials.Content.Routing.Model;
using static VNLib.Plugins.Essentials.Accounts.AccountManager;
namespace VNLib.Plugins.Essentials.Content.Routing
{
/// <summary>
/// Sorts routing rules based on closest match path/hostname routing along with privilage priority
/// </summary>
internal class RouteComparer : IComparer<Route>
{
//The idea is that hostnames without wildcards are exact, and hostnames with wildcards are "catch all"
public int Compare(Route x, Route y)
{
int val = 0;
//If x contains a wildcard in the hostname, then it is less than y
if (x.Hostname.Contains('*'))
{
val--;
}
//If y containts a wildcard, then y is less than x
if (y.Hostname.Contains('*'))
{
val++;
}
//If there was no wildcard, check paths
if (val == 0)
{
//If x containts a wildcard in the path, then x is less than y
if (x.MatchPath.Contains('*'))
{
val--;
}
//If y containts a wildcard in the path, then y is less than x
if (y.MatchPath.Contains('*'))
{
val++;
}
}
//If hostnames and paths are stil equal, check privilage level
if (val == 0)
{
//Higher privilage routine is greater than lower privilage
val = (x.Privilage & LEVEL_MSK) > (y.Privilage & LEVEL_MSK) ? 1 : -1;
}
//If both contain (or are) wildcards, then they are equal
return val;
}
}
}
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