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tweak snapshot LintRawRule

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Collin M. Barrett 2018-08-15 09:32:57 -05:00
parent c35f1591c6
commit db09845c8a
1 changed files with 18 additions and 15 deletions
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33
src/FilterLists.Services/Snapshot/RawRuleLinterExtensions.cs
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@ -1,35 +1,38 @@
namespace FilterLists.Services.Snapshot
using System;
namespace FilterLists.Services.Snapshot
{
public static class RawRuleLinterExtensions
{
public static string LintRawRule(this string rule)
{
rule = rule?.TrimLeadingAndTrailingWhitespace();
rule = rule?.DropIfEmpty();
rule = rule.Trim();
rule = rule.DropIfTooLong();
rule = rule?.DropIfComment();
rule = rule?.DropIfTooLong();
rule = rule?.DropIfContainsBackslashSingleQuote();
rule = rule?.TrimSingleBackslashFromEnd();
rule = rule?.DropIfEmpty();
return rule;
}
private static string TrimLeadingAndTrailingWhitespace(this string rule)
{
char[] charsToTrim = {' ', '\t'};
return rule.Trim(charsToTrim);
}
private static string DropIfEmpty(this string rule) => rule == "" ? null : rule;
private static string DropIfTooLong(this string rule) =>
rule.Length > 8192 ? null : rule;
private static string DropIfComment(this string rule) =>
rule.StartsWith(@"!") && !rule.StartsWith(@"!#") || rule.StartsWith(@"!##") ? null : rule;
private static string DropIfTooLong(this string rule) => rule.Length > 8192 ? null : rule;
rule.StartsWith(@"!", StringComparison.Ordinal) && !rule.StartsWith(@"!#", StringComparison.Ordinal) ||
rule.StartsWith(@"!##", StringComparison.Ordinal)
? null
: rule;
private static string DropIfContainsBackslashSingleQuote(this string rule) =>
rule.Contains(@"\'") ? null : rule;
private static string TrimSingleBackslashFromEnd(this string rule) =>
rule.EndsWith(@"\") && !rule.EndsWith(@"\\") ? rule.Remove(rule.Length - 1) : rule;
rule.EndsWith(@"\", StringComparison.Ordinal) && !rule.EndsWith(@"\\", StringComparison.Ordinal)
? rule.Remove(rule.Length - 1)
: rule;
private static string DropIfEmpty(this string rule) =>
rule == string.Empty ? null : rule;
}
}