53 lines
1.3 KiB
C#
53 lines
1.3 KiB
C#
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namespace Yes.Domain.Core.Extensions
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{
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public static class ArticleSummaryExtensions
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{
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public static string ToSummary(this string content)
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{
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// 去除 HTML 标签
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string text = RemoveHtmlTags(content);
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// 去除 Markdown 标签（简单处理，可能不全面）
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text = Regex.Replace(text, @"\!\[.*?\]\(.*?\)|\[.*?\]\(.*?\)|\*\*.*?\*\*|\*.*?\*|~~.*?~~", "");
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int endIndex = GetEndIndex(text, 50, 100);
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if (endIndex < 50)
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{
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return text;
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}
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else
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{
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return text[..(endIndex + 1)];
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}
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}
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private static string RemoveHtmlTags(string html)
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{
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return Regex.Replace(html, @"<[^>]*>", "");
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}
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private static int GetEndIndex(string text, int start, int end)
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{
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if (text.Length < start)
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{
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return -1;
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}
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end = Math.Min(end, text.Length - 1);
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for (int i = end; i >= start; i--)
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{
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if (".。!?”".Contains(text[i]))
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{
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return i;
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}
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}
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return end;
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}
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}
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}
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