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Handle invalid dates more gracefully

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Closes #766
This commit is contained in:
Tyrrrz
2022-01-05 18:54:23 +02:00
parent 81525a1076
commit e31ff55e33
4 changed files with 23 additions and 12 deletions
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18
DiscordChatExporter.Core/Markdown/Parsing/MarkdownParser.cs
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@@ -235,7 +235,7 @@ internal static partial class MarkdownParser
// Capture <t:12345678> or <t:12345678:R>
private static readonly IMatcher<MarkdownNode> UnixTimestampNodeMatcher = new RegexMatcher<MarkdownNode>(
new Regex("<t:(\\d+)(?::\\w)?>", DefaultRegexOptions),
new Regex("<t:(-?\\d+)(?::\\w)?>", DefaultRegexOptions),
(_, m) =>
{
// TODO: support formatting parameters
@@ -244,17 +244,19 @@ internal static partial class MarkdownParser
if (!long.TryParse(m.Groups[1].Value, NumberStyles.Integer, CultureInfo.InvariantCulture,
out var offset))
{
return null;
return new UnixTimestampNode(null);
}
// Bound check
// https://github.com/Tyrrrz/DiscordChatExporter/issues/681
if (offset < TimeSpan.MinValue.TotalSeconds || offset > TimeSpan.MaxValue.TotalSeconds)
try
{
return null;
return new UnixTimestampNode(DateTimeOffset.UnixEpoch + TimeSpan.FromSeconds(offset));
}
// https://github.com/Tyrrrz/DiscordChatExporter/issues/681
// https://github.com/Tyrrrz/DiscordChatExporter/issues/766
catch (Exception ex) when (ex is ArgumentOutOfRangeException or OverflowException)
{
return new UnixTimestampNode(null);
}
return new UnixTimestampNode(DateTimeOffset.UnixEpoch + TimeSpan.FromSeconds(offset));
}
);

3
DiscordChatExporter.Core/Markdown/UnixTimestampNode.cs
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@@ -2,4 +2,5 @@
namespace DiscordChatExporter.Core.Markdown;
internal record UnixTimestampNode(DateTimeOffset Value) : MarkdownNode;
// Null means invalid date
internal record UnixTimestampNode(DateTimeOffset? Date) : MarkdownNode;