fengchuanhn@gmail.com
148 lines
4.2 KiB
JavaScript
148 lines
4.2 KiB
JavaScript
"use strict";
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/**
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* 从混杂文本中提取抖音分享内容（链接、文案、话题）。
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* 自 zhenqianba DouyinContentParser 移植，CommonJS 导出供 require。
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*/
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const DIRECT_VIDEO_PATTERN =
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/https?:\/\/[^\s"'<>]+?\.(mp4|mov|m4v|webm|avi|mkv)(\?[^\s"'<>]*)?/i;
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class DouyinContentParser {
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/**
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* @param {string} input
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* @returns {{ success: true, content: object } | { success: false, error: string }}
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*/
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static parseContent(input) {
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try {
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const raw = String(input || "").trim();
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if (!raw) {
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return { success: false, error: "输入内容为空" };
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}
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const videoUrl = this.extractVideoUrl(raw);
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if (!videoUrl) {
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return { success: false, error: "未找到有效的抖音视频链接" };
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}
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const description = this.extractDescription(raw, videoUrl);
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const hashtags = this.extractHashtags(raw);
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return {
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success: true,
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content: {
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videoUrl,
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description,
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hashtags,
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rawText: raw,
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},
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};
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} catch (error) {
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return {
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success: false,
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error: `解析失败: ${error instanceof Error ? error.message : String(error)}`,
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};
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}
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}
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static extractVideoUrl(text) {
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const directVideoMatch = text.match(DIRECT_VIDEO_PATTERN);
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if (directVideoMatch && directVideoMatch[0]) {
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return directVideoMatch[0];
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}
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const patterns = [
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/https:\/\/v\.douyin\.com\/[\w_\-@]+\/?/i,
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/https:\/\/(?:www\.)?douyin\.com\/(?:video|modal)\/\d+/i,
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/https:\/\/iesdouyin\.com\/(?:share\/video|video)\/\d+/i,
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/v\.douyin\.com\/[\w_\-@]+/i,
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/douyin\.com\/(?:video|modal)\/\d+/i,
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];
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for (const pattern of patterns) {
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const match = text.match(pattern);
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if (match) {
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let url = match[0];
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if (!url.startsWith("http")) {
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url = "https://" + url;
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}
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return url;
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}
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}
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return null;
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}
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static isDirectVideoUrl(url) {
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return DIRECT_VIDEO_PATTERN.test(String(url || "").trim());
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}
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static extractDescription(text, videoUrl) {
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const urlIndex = text.indexOf(videoUrl);
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let descriptionText = "";
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if (urlIndex > 0) {
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descriptionText = text.substring(0, urlIndex).trim();
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} else {
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const descriptionMatch = text.match(/^([^h]*?)(?:https?:\/\/|$)/);
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if (descriptionMatch && descriptionMatch[1]) {
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descriptionText = descriptionMatch[1].trim();
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}
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}
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return this.cleanDescription(descriptionText);
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}
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static cleanDescription(text) {
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if (!text) return "";
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let cleaned = text.replace(/^[\d\s./]+/, "").trim();
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const startMatch = cleaned.match(/^[^\u4e00-\u9fff\w\s]*(.*)$/);
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if (startMatch && startMatch[1]) {
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const potential = startMatch[1].trim();
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if (potential.length > 0) {
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cleaned = potential;
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}
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}
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if (/^[\W_]+$/.test(cleaned)) {
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return "";
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}
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return cleaned;
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}
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static extractHashtags(text) {
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const hashtagPattern = /#[\w\u4e00-\u9fff_]+/g;
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const matches = text.match(hashtagPattern);
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if (!matches) return [];
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return Array.from(new Set(matches));
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}
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static extractVideoId(videoUrl) {
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const shortMatch = videoUrl.match(/v\.douyin\.com\/([\w_\-@]+)/i);
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if (shortMatch) return shortMatch[1];
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const standardMatch = videoUrl.match(/\/(?:video|modal)\/(\d+)/i);
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if (standardMatch) return standardMatch[1];
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return null;
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}
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static generateTitleFromDescription(description, maxLength = 30) {
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if (!description) {
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return "分享精彩内容";
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}
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const sentenceEnd = description.match(/[。！？\n]/);
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let title = "";
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if (sentenceEnd) {
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title = description.substring(0, sentenceEnd.index).trim();
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} else {
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title = description;
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}
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if (title.length > maxLength) {
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title = title.substring(0, maxLength) + "...";
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}
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return title || "精彩分享";
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}
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static quickExtractUrl(text) {
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const r = this.parseContent(text);
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return r.success && r.content ? r.content.videoUrl : null;
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}
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static quickExtractDescription(text) {
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const r = this.parseContent(text);
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return r.success && r.content ? r.content.description : null;
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}
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}
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module.exports = { DouyinContentParser, DIRECT_VIDEO_PATTERN };
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