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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Text;
namespace Microsoft.AspNetCore.Rewrite.PatternSegments;
internal sealed class ToLowerSegment : PatternSegment
{
private readonly Pattern _pattern;
public ToLowerSegment(Pattern pattern)
{
_pattern = pattern;
}
public override string? Evaluate(RewriteContext context, BackReferenceCollection? ruleBackReferences, BackReferenceCollection? conditionBackReferences)
{
// PERF as we share the string builder across the context, we need to make a new one here to evaluate
// lowercase segments.
var tempBuilder = context.Builder;
context.Builder = new StringBuilder(64);
var pattern = _pattern.Evaluate(context, ruleBackReferences, conditionBackReferences);
context.Builder = tempBuilder;
return pattern.ToLowerInvariant();
}
}
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