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using System;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;
using StardewModdingAPI.Toolkit;
namespace StardewModdingAPI.Web.Framework
{
/// <summary>Constrains a route value to a valid semantic version.</summary>
internal class VersionConstraint : IRouteConstraint
{
/*********
** Public methods
*********/
/// <summary>Get whether the URL parameter contains a valid value for this constraint.</summary>
/// <param name="httpContext">An object that encapsulates information about the HTTP request.</param>
/// <param name="route">The router that this constraint belongs to.</param>
/// <param name="routeKey">The name of the parameter that is being checked.</param>
/// <param name="values">A dictionary that contains the parameters for the URL.</param>
/// <param name="routeDirection">An object that indicates whether the constraint check is being performed when an incoming request is being handled or when a URL is being generated.</param>
/// <returns><c>true</c> if the URL parameter contains a valid value; otherwise, <c>false</c>.</returns>
public bool Match(HttpContext httpContext, IRouter route, string routeKey, RouteValueDictionary values, RouteDirection routeDirection)
{
if (routeKey == null)
throw new ArgumentNullException(nameof(routeKey));
if (values == null)
throw new ArgumentNullException(nameof(values));
return
values.TryGetValue(routeKey, out object routeValue)
&& routeValue is string routeStr
&& SemanticVersion.TryParse(routeStr, allowNonStandard: true, out _);
}
}
}
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