23 lines
1.1 KiB
TypeScript
23 lines
1.1 KiB
TypeScript
// 把 Markdown 消息压成一行纯文本，用于历史列表预览和标题：
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// 去掉记号本身（##、**、[]() 等），保留可读内容；围栏代码块整体替换为占位词。
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export function markdownPlainText(value: string, codePlaceholder = "代码块") {
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return value
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.replace(/```[\s\S]*?(?:```|$)/gu, ` ${codePlaceholder} `)
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.replace(/^\s*\|?[\s:|-]*-[\s:|-]*\|?\s*$/gmu, " ")
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.replace(/`([^`]*)`/gu, "$1")
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.replace(/!\[([^\]]*)\]\(([^)]*)\)/gu, (_, alt: string, url: string) => ` ${alt || url} `)
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.replace(/\[([^\]]*)\]\(([^)]*)\)/gu, "$1")
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.replace(/^\s{0,3}#{1,6}\s+/gmu, "")
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.replace(/^\s{0,3}>\s?/gmu, "")
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.replace(/^\s{0,3}(?:[-*_]\s*){3,}$/gmu, " ")
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.replace(/^\s*[-*+]\s+/gmu, "")
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.replace(/^\s*\d+[.)]\s+/gmu, "")
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.replace(/(\*\*|__)(.*?)\1/gu, "$2")
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.replace(/~~(.*?)~~/gu, "$1")
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.replace(/(^|\W)(\*|_)(?=\S)([\s\S]*?\S)\2(?=\W|$)/gu, "$1$3")
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.replace(/<[^>]+>/gu, " ")
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.replace(/\|/gu, " ")
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.replace(/\s+/gu, " ")
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.trim();
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}
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