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* Minified by jsDelivr using Terser v5.39.0.\n * Original file: /npm/youtube-caption-extractor@1.9.1/dist/index.js\n *\n * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files\n */\n","\"use strict\";\nvar __importDefault = (this && this.__importDefault) || function (mod) {\n return (mod && mod.__esModule) ? mod : { \"default\": mod };\n};\nObject.defineProperty(exports, \"__esModule\", { value: true });\nexports.getSubtitles = exports.getVideoDetails = void 0;\nconst he_1 = __importDefault(require(\"he\"));\nconst striptags_1 = __importDefault(require(\"striptags\"));\n// Universal logger that works in all environments (Node.js, Cloudflare Workers, etc.)\nconst createLogger = (namespace) => {\n const isDebugEnabled = () => {\n try {\n // Try to access environment variables in a safe way\n const env = typeof process !== 'undefined' && process.env ? process.env : {};\n const debugEnv = env.DEBUG || '';\n return debugEnv === '*' || debugEnv.includes(namespace);\n }\n catch (_a) {\n return false;\n }\n };\n return (message, ...args) => {\n if (isDebugEnabled()) {\n const timestamp = new Date().toISOString();\n const logMessage = `${timestamp} ${namespace} ${message}`;\n // Use console.log safely - available in all environments\n if (args.length > 0) {\n console.log(logMessage, ...args);\n }\n else {\n console.log(logMessage);\n }\n }\n };\n};\nconst debug = createLogger('youtube-caption-extractor');\n// YouTube InnerTube API configuration based on YouTube.js\nconst INNERTUBE_CONFIG = {\n API_BASE: 'https://www.youtube.com/youtubei/v1',\n API_KEY: 'AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8',\n CLIENT: {\n WEB: {\n NAME: 'WEB',\n VERSION: '2.20250222.10.00',\n },\n ANDROID: {\n NAME: 'ANDROID',\n VERSION: '19.35.36',\n },\n },\n};\n// Detect serverless environment\nconst isServerless = !!(process.env.VERCEL ||\n process.env.AWS_LAMBDA_FUNCTION_NAME ||\n process.env.NETLIFY ||\n process.env.CF_WORKER);\n// Generate proper session data for serverless environments\nfunction generateSessionData() {\n const visitorData = generateVisitorData();\n return {\n context: {\n client: {\n hl: 'en',\n gl: 'US',\n clientName: INNERTUBE_CONFIG.CLIENT.WEB.NAME,\n clientVersion: INNERTUBE_CONFIG.CLIENT.WEB.VERSION,\n visitorData,\n },\n user: {\n enableSafetyMode: false,\n },\n request: {\n useSsl: true,\n },\n },\n visitorData,\n };\n}\n// Generate visitor data (simplified version of YouTube.js approach)\nfunction generateVisitorData() {\n // This is a simplified version - YouTube.js uses more complex protobuf encoding\n const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';\n let result = '';\n for (let i = 0; i < 11; i++) {\n result += chars.charAt(Math.floor(Math.random() * chars.length));\n }\n return result;\n}\n// Enhanced fetch with proper InnerTube headers\nasync function fetchInnerTube(endpoint, data) {\n const headers = {\n 'Content-Type': 'application/json',\n Accept: '*/*',\n 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36',\n 'X-Youtube-Client-Version': INNERTUBE_CONFIG.CLIENT.WEB.VERSION,\n 'X-Youtube-Client-Name': '1', // WEB client ID\n 'X-Goog-Visitor-Id': data.visitorData,\n Origin: 'https://www.youtube.com',\n Referer: 'https://www.youtube.com/',\n };\n const url = `${INNERTUBE_CONFIG.API_BASE}${endpoint}?key=${INNERTUBE_CONFIG.API_KEY}`;\n debug(`Calling InnerTube endpoint: ${endpoint}`);\n return await fetch(url, {\n method: 'POST',\n headers,\n body: JSON.stringify(data),\n });\n}\n// Get video info using proper InnerTube API\nasync function getVideoInfo(videoID) {\n var _a, _b;\n const sessionData = generateSessionData();\n const payload = {\n ...sessionData,\n videoId: videoID,\n playbackContext: {\n contentPlaybackContext: {\n vis: 0,\n splay: false,\n lactMilliseconds: '-1',\n },\n },\n racyCheckOk: true,\n contentCheckOk: true,\n };\n const response = await fetchInnerTube('/player', payload);\n if (!response.ok) {\n throw new Error(`Player API failed: ${response.status} ${response.statusText}`);\n }\n const playerData = await response.json();\n if (((_a = playerData.playabilityStatus) === null || _a === void 0 ? 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void 0 : _l.languageMenu) === null || _m === void 0 ? void 0 : _m.sortFilterSubMenuRenderer) === null || _o === void 0 ? void 0 : _o.subMenuItems) {\n // Find English or first available language\n const menuItems = footer.transcriptFooterRenderer.languageMenu\n .sortFilterSubMenuRenderer.subMenuItems;\n const englishItem = menuItems.find((item) => {\n var _a;\n return ((_a = item === null || item === void 0 ? void 0 : item.title) === null || _a === void 0 ? void 0 : _a.toLowerCase().includes('english')) ||\n (item === null || item === void 0 ? void 0 : item.selected) === true;\n }) || menuItems[0];\n if ((_q = (_p = englishItem === null || englishItem === void 0 ? void 0 : englishItem.continuation) === null || _p === void 0 ? void 0 : _p.reloadContinuationData) === null || _q === void 0 ? void 0 : _q.continuation) {\n token =\n englishItem.continuation.reloadContinuationData.continuation;\n break;\n }\n }\n }\n }\n }\n if (!token) {\n debug(` No continuation token found in transcript panel`);\n return [];\n }\n debug(` Found continuation token, calling get_transcript`);\n // Call the get_transcript endpoint\n const sessionData = generateSessionData();\n const transcriptPayload = {\n ...sessionData,\n params: token,\n };\n const transcriptResponse = await fetchInnerTube('/get_transcript', transcriptPayload);\n if (!transcriptResponse.ok) {\n throw new Error(`Transcript API failed: ${transcriptResponse.status} ${transcriptResponse.statusText}`);\n }\n const transcriptData = await transcriptResponse.json();\n debug(` Transcript API response keys:`, Object.keys(transcriptData));\n // Parse transcript segments\n const segments = (_z = (_y = (_x = (_w = (_v = (_u = (_t = (_s = (_r = transcriptData === null || transcriptData === void 0 ? void 0 : transcriptData.actions) === null || _r === void 0 ? void 0 : _r[0]) === null || _s === void 0 ? void 0 : _s.updateEngagementPanelAction) === null || _t === void 0 ? void 0 : _t.content) === null || _u === void 0 ? void 0 : _u.transcriptRenderer) === null || _v === void 0 ? void 0 : _v.content) === null || _w === void 0 ? void 0 : _w.transcriptSearchPanelRenderer) === null || _x === void 0 ? void 0 : _x.body) === null || _y === void 0 ? void 0 : _y.transcriptSegmentListRenderer) === null || _z === void 0 ? void 0 : _z.initialSegments;\n if (!segments || !Array.isArray(segments)) {\n debug(` No transcript segments found`);\n return [];\n }\n debug(` Found ${segments.length} transcript segments`);\n // Successfully parsing transcript segments\n const subtitles = [];\n let debugCount = 0;\n for (const segment of segments) {\n if (segment.transcriptSegmentRenderer) {\n const renderer = segment.transcriptSegmentRenderer;\n // Extract subtitle data\n const startMs = parseInt(renderer.startMs || '0');\n const endMs = parseInt(renderer.endMs || '0');\n // Try different text extraction paths\n let text = '';\n if ((_0 = renderer.snippet) === null || _0 === void 0 ? void 0 : _0.simpleText) {\n text = renderer.snippet.simpleText;\n }\n else if ((_1 = renderer.snippet) === null || _1 === void 0 ? void 0 : _1.runs) {\n text = renderer.snippet.runs.map((run) => run.text).join('');\n }\n else if ((_2 = renderer.snippet) === null || _2 === void 0 ? void 0 : _2.text) {\n text = renderer.snippet.text;\n }\n // Log progress for first few segments\n if (debugCount < 5) {\n debug(` Segment: startMs=${startMs}, endMs=${endMs}, text=\"${text.substring(0, 50)}${text.length > 50 ? '...' : ''}\"`);\n debugCount++;\n }\n if (text.trim()) {\n subtitles.push({\n start: (startMs / 1000).toString(),\n dur: ((endMs - startMs) / 1000).toString(),\n text: he_1.default.decode((0, striptags_1.default)(text)),\n });\n }\n }\n }\n return subtitles;\n}\n// Fallback: Extract captions from player data (traditional method)\nasync function getSubtitlesFromCaptions(videoID, playerData, lang = 'en') {\n var _a, _b;\n const captionTracks = (_b = (_a = playerData === null || playerData === void 0 ? void 0 : playerData.captions) === null || _a === void 0 ? void 0 : _a.playerCaptionsTracklistRenderer) === null || _b === void 0 ? void 0 : _b.captionTracks;\n if (!captionTracks || !Array.isArray(captionTracks)) {\n debug(` No caption tracks found in player data`);\n return [];\n }\n debug(` Found ${captionTracks.length} caption tracks`);\n // Find the appropriate subtitle language track\n const subtitle = captionTracks.find((track) => track.vssId === `.${lang}`) ||\n captionTracks.find((track) => track.vssId === `a.${lang}`) ||\n captionTracks.find((track) => { var _a; return (_a = track.vssId) === null || _a === void 0 ? void 0 : _a.includes(`.${lang}`); }) ||\n captionTracks[0]; // fallback to first available\n if (!(subtitle === null || subtitle === void 0 ? void 0 : subtitle.baseUrl)) {\n debug(` No suitable caption track found`);\n return [];\n }\n debug(` Using caption track: ${subtitle.vssId}`);\n // Fetch the caption content\n const captionUrl = subtitle.baseUrl.replace('&fmt=srv3', ''); // Force XML format\n const response = await fetch(captionUrl, {\n headers: {\n 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',\n Referer: `https://www.youtube.com/watch?v=${videoID}`,\n },\n });\n if (!response.ok) {\n throw new Error(`Caption fetch failed: ${response.status}`);\n }\n const xmlText = await response.text();\n if (!xmlText.trim() || !xmlText.includes('', '')\n .replace('', '')\n .split('')\n .filter((line) => line && line.trim())\n .reduce((acc, line) => {\n const startResult = startRegex.exec(line);\n const durResult = durRegex.exec(line);\n if (!startResult || !durResult) {\n return acc;\n }\n const [, start] = startResult;\n const [, dur] = durResult;\n const htmlText = line\n .replace(//, '')\n .replace(/&/gi, '&')\n .replace(/<\\/?[^>]+(>|$)/g, '');\n const decodedText = he_1.default.decode(htmlText);\n const text = (0, striptags_1.default)(decodedText);\n acc.push({\n start,\n dur,\n text,\n });\n return acc;\n }, []);\n}\nconst getVideoDetails = async ({ videoID, lang = 'en', }) => {\n var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r, _s, _t, _u, _v, _w, _x, _y, _z, _0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24, _25, _26, _27, _28, _29, _30;\n try {\n debug(` Getting video details for ${videoID}, serverless: ${isServerless}`);\n // Get video info using proper InnerTube API\n const { playerData, nextData } = await getVideoInfo(videoID);\n // Extract basic video details\n const videoDetails = playerData === null || playerData === void 0 ? void 0 : playerData.videoDetails;\n // Extract title from multiple possible locations\n let title = 'No title found';\n if (videoDetails === null || videoDetails === void 0 ? void 0 : videoDetails.title) {\n title = videoDetails.title;\n }\n else if ((_k = (_j = (_h = (_g = (_f = (_e = (_d = (_c = (_b = (_a = nextData === null || nextData === void 0 ? void 0 : nextData.contents) === null || _a === void 0 ? void 0 : _a.twoColumnWatchNextResults) === null || _b === void 0 ? void 0 : _b.results) === null || _c === void 0 ? void 0 : _c.results) === null || _d === void 0 ? void 0 : _d.contents) === null || _e === void 0 ? void 0 : _e[0]) === null || _f === void 0 ? void 0 : _f.videoPrimaryInfoRenderer) === null || _g === void 0 ? void 0 : _g.title) === null || _h === void 0 ? void 0 : _h.runs) === null || _j === void 0 ? void 0 : _j[0]) === null || _k === void 0 ? void 0 : _k.text) {\n title =\n nextData.contents.twoColumnWatchNextResults.results.results.contents[0]\n .videoPrimaryInfoRenderer.title.runs[0].text;\n }\n else if ((_o = (_m = (_l = nextData === null || nextData === void 0 ? void 0 : nextData.metadata) === null || _l === void 0 ? void 0 : _l.videoMetadataRenderer) === null || _m === void 0 ? void 0 : _m.title) === null || _o === void 0 ? void 0 : _o.simpleText) {\n title = nextData.metadata.videoMetadataRenderer.title.simpleText;\n }\n else if ((_p = nextData === null || nextData === void 0 ? void 0 : nextData.videoDetails) === null || _p === void 0 ? void 0 : _p.title) {\n title = nextData.videoDetails.title;\n }\n // Extract description from multiple possible locations\n let description = 'No description found';\n if (videoDetails === null || videoDetails === void 0 ? void 0 : videoDetails.shortDescription) {\n description = videoDetails.shortDescription;\n }\n else if ((_x = (_w = (_v = (_u = (_t = (_s = (_r = (_q = nextData === null || nextData === void 0 ? void 0 : nextData.contents) === null || _q === void 0 ? void 0 : _q.twoColumnWatchNextResults) === null || _r === void 0 ? void 0 : _r.results) === null || _s === void 0 ? void 0 : _s.results) === null || _t === void 0 ? void 0 : _t.contents) === null || _u === void 0 ? void 0 : _u[1]) === null || _v === void 0 ? void 0 : _v.videoSecondaryInfoRenderer) === null || _w === void 0 ? void 0 : _w.description) === null || _x === void 0 ? void 0 : _x.runs) {\n description =\n nextData.contents.twoColumnWatchNextResults.results.results.contents[1].videoSecondaryInfoRenderer.description.runs\n .map((run) => run.text)\n .join('');\n }\n else if ((_6 = (_5 = (_4 = (_3 = (_2 = (_1 = (_0 = (_z = (_y = nextData === null || nextData === void 0 ? void 0 : nextData.contents) === null || _y === void 0 ? void 0 : _y.twoColumnWatchNextResults) === null || _z === void 0 ? void 0 : _z.results) === null || _0 === void 0 ? void 0 : _0.results) === null || _1 === void 0 ? void 0 : _1.contents) === null || _2 === void 0 ? void 0 : _2[0]) === null || _3 === void 0 ? void 0 : _3.videoPrimaryInfoRenderer) === null || _4 === void 0 ? void 0 : _4.videoActions) === null || _5 === void 0 ? void 0 : _5.menuRenderer) === null || _6 === void 0 ? void 0 : _6.topLevelButtons) {\n // Look for description in primary info renderer\n const primaryInfo = nextData.contents.twoColumnWatchNextResults.results.results.contents[0]\n .videoPrimaryInfoRenderer;\n if ((_7 = primaryInfo === null || primaryInfo === void 0 ? void 0 : primaryInfo.description) === null || _7 === void 0 ? void 0 : _7.runs) {\n description = primaryInfo.description.runs\n .map((run) => run.text)\n .join('');\n }\n }\n else if ((_10 = (_9 = (_8 = nextData === null || nextData === void 0 ? void 0 : nextData.metadata) === null || _8 === void 0 ? void 0 : _8.videoMetadataRenderer) === null || _9 === void 0 ? void 0 : _9.description) === null || _10 === void 0 ? void 0 : _10.simpleText) {\n description =\n nextData.metadata.videoMetadataRenderer.description.simpleText;\n }\n else if ((_11 = nextData === null || nextData === void 0 ? void 0 : nextData.videoDetails) === null || _11 === void 0 ? void 0 : _11.shortDescription) {\n description = nextData.videoDetails.shortDescription;\n }\n // Additional search in the secondary info renderer with alternative path\n if (description === 'No description found' &&\n ((_15 = (_14 = (_13 = (_12 = nextData === null || nextData === void 0 ? void 0 : nextData.contents) === null || _12 === void 0 ? void 0 : _12.twoColumnWatchNextResults) === null || _13 === void 0 ? void 0 : _13.results) === null || _14 === void 0 ? void 0 : _14.results) === null || _15 === void 0 ? void 0 : _15.contents)) {\n for (const content of nextData.contents.twoColumnWatchNextResults.results\n .results.contents) {\n if ((_17 = (_16 = content === null || content === void 0 ? void 0 : content.videoSecondaryInfoRenderer) === null || _16 === void 0 ? void 0 : _16.description) === null || _17 === void 0 ? void 0 : _17.runs) {\n description = content.videoSecondaryInfoRenderer.description.runs\n .map((run) => run.text)\n .join('');\n break;\n }\n if ((_19 = (_18 = content === null || content === void 0 ? void 0 : content.videoSecondaryInfoRenderer) === null || _18 === void 0 ? void 0 : _18.attributedDescription) === null || _19 === void 0 ? void 0 : _19.content) {\n description =\n content.videoSecondaryInfoRenderer.attributedDescription.content;\n break;\n }\n }\n }\n // Search in engagement panels for description\n if (description === 'No description found' && (nextData === null || nextData === void 0 ? void 0 : nextData.engagementPanels)) {\n for (const panel of nextData.engagementPanels) {\n if ((_22 = (_21 = (_20 = panel === null || panel === void 0 ? void 0 : panel.engagementPanelSectionListRenderer) === null || _20 === void 0 ? void 0 : _20.content) === null || _21 === void 0 ? void 0 : _21.structuredDescriptionContentRenderer) === null || _22 === void 0 ? void 0 : _22.items) {\n const items = panel.engagementPanelSectionListRenderer.content\n .structuredDescriptionContentRenderer.items;\n for (const item of items) {\n if ((_24 = (_23 = item === null || item === void 0 ? void 0 : item.videoDescriptionHeaderRenderer) === null || _23 === void 0 ? void 0 : _23.description) === null || _24 === void 0 ? void 0 : _24.runs) {\n description = item.videoDescriptionHeaderRenderer.description.runs\n .map((run) => run.text)\n .join('');\n break;\n }\n if ((_26 = (_25 = item === null || item === void 0 ? void 0 : item.expandableVideoDescriptionBodyRenderer) === null || _25 === void 0 ? void 0 : _25.descriptionBodyText) === null || _26 === void 0 ? void 0 : _26.runs) {\n description =\n item.expandableVideoDescriptionBodyRenderer.descriptionBodyText.runs\n .map((run) => run.text)\n .join('');\n break;\n }\n }\n if (description !== 'No description found')\n break;\n }\n }\n }\n debug(` Video title: ${title}`);\n debug(` Video description: ${description.substring(0, 100)}${description.length > 100 ? '...' : ''}`);\n // Debug: Show available data structures for description\n if (description === 'No description found') {\n debug(` Description not found, checking available structures...`);\n if ((_30 = (_29 = (_28 = (_27 = nextData === null || nextData === void 0 ? void 0 : nextData.contents) === null || _27 === void 0 ? void 0 : _27.twoColumnWatchNextResults) === null || _28 === void 0 ? void 0 : _28.results) === null || _29 === void 0 ? void 0 : _29.results) === null || _30 === void 0 ? void 0 : _30.contents) {\n nextData.contents.twoColumnWatchNextResults.results.results.contents.forEach((content, index) => {\n debug(` Content ${index} keys:`, Object.keys(content || {}));\n if (content === null || content === void 0 ? void 0 : content.videoSecondaryInfoRenderer) {\n debug(`videoSecondaryInfoRenderer keys:`, Object.keys(content.videoSecondaryInfoRenderer || {}));\n }\n });\n }\n }\n let subtitles = [];\n // Method 1: Try to get transcript from engagement panel (preferred, like YouTube.js)\n if (nextData) {\n try {\n subtitles = await getTranscriptFromEngagementPanel(videoID, nextData);\n if (subtitles.length > 0) {\n debug(` Successfully got ${subtitles.length} subtitles from transcript API`);\n }\n }\n catch (error) {\n debug(` Transcript API failed:`, error instanceof Error ? error.message : 'Unknown error');\n }\n }\n // Method 2: Fallback to traditional caption tracks\n if (subtitles.length === 0) {\n try {\n subtitles = await getSubtitlesFromCaptions(videoID, playerData, lang);\n if (subtitles.length > 0) {\n debug(` Successfully got ${subtitles.length} subtitles from captions`);\n }\n }\n catch (error) {\n debug(` Caption fallback failed:`, error instanceof Error ? error.message : 'Unknown error');\n }\n }\n if (subtitles.length === 0) {\n debug(` No subtitles found for video: ${videoID} (language: ${lang})`);\n }\n return {\n title,\n description,\n subtitles,\n };\n }\n catch (error) {\n debug(`Error in getVideoDetails:`, error);\n throw error;\n }\n};\nexports.getVideoDetails = getVideoDetails;\nconst getSubtitles = async ({ videoID, lang = 'en', }) => {\n try {\n debug(` Getting subtitles for ${videoID}, serverless: ${isServerless}`);\n const { playerData, nextData } = await getVideoInfo(videoID);\n // Try transcript API first\n if (nextData) {\n try {\n const subtitles = await getTranscriptFromEngagementPanel(videoID, nextData);\n if (subtitles.length > 0) {\n return subtitles;\n }\n }\n catch (error) {\n debug(` Transcript API failed:`, error instanceof Error ? error.message : 'Unknown error');\n }\n }\n // Fallback to captions\n return await getSubtitlesFromCaptions(videoID, playerData, lang);\n }\n catch (error) {\n debug('Error getting subtitles:', error);\n throw error;\n }\n};\nexports.getSubtitles = getSubtitles;\n"]}