56 lines
1.7 KiB
TypeScript
56 lines
1.7 KiB
TypeScript
/**
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* 纯文本 URL 切分（QQ 风格：识别 http(s):// 与 www.）
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* 仅产出 http/https，拒绝其它协议。
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*/
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const URL_RE = /(?:https?:\/\/|www\.)[^\s\u4e00-\u9fff<>"'`]+/gi;
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/** 常见尾随标点从 URL 剥离（中英） */
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const TRAIL_PUNCT = /[.,;:!?。，；：！？、)\]}》〉』」"'`]+$/;
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export type LinkifyPart =
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| { type: "text"; value: string }
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| { type: "url"; value: string; href: string };
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function toHref(raw: string): string | null {
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const href = /^www\./i.test(raw) ? `https://${raw}` : raw;
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try {
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const u = new URL(href);
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if (u.protocol !== "http:" && u.protocol !== "https:") return null;
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return u.href;
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} catch {
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return null;
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}
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}
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function peel(raw: string): { core: string; trail: string } {
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const m = raw.match(TRAIL_PUNCT);
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if (!m) return { core: raw, trail: "" };
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return { core: raw.slice(0, -m[0].length), trail: m[0] };
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}
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/** 将纯文本切成文本段与可安全打开的链接段 */
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export function linkifyParts(text: string): LinkifyPart[] {
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if (!text) return [];
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const parts: LinkifyPart[] = [];
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let last = 0;
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URL_RE.lastIndex = 0;
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let m: RegExpExecArray | null;
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while ((m = URL_RE.exec(text)) !== null) {
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if (m.index > last) {
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parts.push({ type: "text", value: text.slice(last, m.index) });
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}
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const { core, trail } = peel(m[0]);
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const href = core ? toHref(core) : null;
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if (href && core) {
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parts.push({ type: "url", value: core, href });
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if (trail) parts.push({ type: "text", value: trail });
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} else {
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parts.push({ type: "text", value: m[0] });
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}
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last = m.index + m[0].length;
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}
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if (last < text.length) parts.push({ type: "text", value: text.slice(last) });
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return parts.length ? parts : [{ type: "text", value: text }];
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}
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