{"version":3,"file":"Browser-BO6khSKR.cjs","sources":["../lib/domains-config.ts","../app/components/browser/Browser.tsx"],"sourcesContent":["/**\n * Domain Configuration for Educational Resources\n * Following best practices for online exam environments\n */\n\nexport type DomainCategory =\n | \"encyclopedia\"\n | \"academic\"\n | \"mathematics\"\n | \"science\"\n | \"programming\"\n | \"reference\"\n | \"educational\"\n | \"government\";\n\nexport interface DomainConfig {\n domain: string;\n category: DomainCategory;\n canEmbed: boolean;\n searchWeight: number; // 0-1, higher = more relevant for academic use\n description: string;\n searchPriority: number; // 1-10, higher = shown first in results\n}\n\n/**\n * Comprehensive list of educational domains suitable for exams\n * All domains have been tested for embedding and reader mode compatibility\n */\nexport const EDUCATIONAL_DOMAINS: DomainConfig[] = [\n // Encyclopedias & General Reference\n {\n domain: \"wikipedia.org\",\n category: \"encyclopedia\",\n canEmbed: true,\n searchWeight: 0.95,\n description: \"Free encyclopedia with academic content\",\n searchPriority: 10,\n },\n {\n domain: \"britannica.com\",\n category: \"encyclopedia\",\n canEmbed: true,\n searchWeight: 0.95,\n description: \"Professional encyclopedia with verified content\",\n searchPriority: 9,\n },\n {\n domain: \"wikimedia.org\",\n category: \"encyclopedia\",\n canEmbed: true,\n searchWeight: 0.85,\n description: \"Wikimedia foundation resources\",\n searchPriority: 8,\n },\n\n // Mathematics\n {\n domain: \"khanacademy.org\",\n category: \"mathematics\",\n canEmbed: false,\n searchWeight: 1.0,\n description: \"Free educational platform with math courses\",\n searchPriority: 10,\n },\n {\n domain: \"wolframalpha.com\",\n category: \"mathematics\",\n canEmbed: false,\n searchWeight: 1.0,\n description: \"Computational knowledge engine\",\n searchPriority: 10,\n },\n {\n domain: \"mathworld.wolfram.com\",\n category: \"mathematics\",\n canEmbed: true,\n searchWeight: 0.95,\n description: \"Comprehensive mathematics resource\",\n searchPriority: 9,\n },\n {\n domain: \"desmos.com\",\n category: \"mathematics\",\n canEmbed: true,\n searchWeight: 0.9,\n description: \"Graphing calculator and math tools\",\n searchPriority: 9,\n },\n {\n domain: \"geogebra.org\",\n category: \"mathematics\",\n canEmbed: true,\n searchWeight: 0.9,\n description: \"Interactive geometry and algebra\",\n searchPriority: 8,\n },\n {\n domain: \"mathsisfun.com\",\n category: \"mathematics\",\n canEmbed: true,\n searchWeight: 0.85,\n description: \"Math explained in simple language\",\n searchPriority: 7,\n },\n\n // Science\n {\n domain: \"nature.com\",\n category: \"science\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"Scientific research and journals\",\n searchPriority: 9,\n },\n {\n domain: \"sciencedirect.com\",\n category: \"science\",\n canEmbed: true,\n searchWeight: 0.95,\n description: \"Scientific research database\",\n searchPriority: 9,\n },\n {\n domain: \"ncbi.nlm.nih.gov\",\n category: \"science\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"National Center for Biotechnology Information\",\n searchPriority: 9,\n },\n {\n domain: \"pubmed.ncbi.nlm.nih.gov\",\n category: \"science\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"Biomedical literature database\",\n searchPriority: 9,\n },\n {\n domain: \"chemguide.co.uk\",\n category: \"science\",\n canEmbed: true,\n searchWeight: 0.85,\n description: \"Chemistry study guide\",\n searchPriority: 7,\n },\n {\n domain: \"physics.org\",\n category: \"science\",\n canEmbed: true,\n searchWeight: 0.85,\n description: \"Physics resources and education\",\n searchPriority: 7,\n },\n\n // Programming & Technology\n {\n domain: \"developer.mozilla.org\",\n category: \"programming\",\n canEmbed: false,\n searchWeight: 1.0,\n description: \"MDN Web Docs for web technologies\",\n searchPriority: 10,\n },\n {\n domain: \"stackoverflow.com\",\n category: \"programming\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"Programming Q&A community\",\n searchPriority: 9,\n },\n {\n domain: \"github.com\",\n category: \"programming\",\n canEmbed: false,\n searchWeight: 0.9,\n description: \"Code repository and documentation\",\n searchPriority: 8,\n },\n {\n domain: \"w3schools.com\",\n category: \"programming\",\n canEmbed: false,\n searchWeight: 0.85,\n description: \"Web development tutorials\",\n searchPriority: 7,\n },\n {\n domain: \"docs.python.org\",\n category: \"programming\",\n canEmbed: true,\n searchWeight: 0.95,\n description: \"Official Python documentation\",\n searchPriority: 9,\n },\n {\n domain: \"nodejs.org\",\n category: \"programming\",\n canEmbed: true,\n searchWeight: 0.9,\n description: \"Node.js documentation\",\n searchPriority: 8,\n },\n {\n domain: \"reactjs.org\",\n category: \"programming\",\n canEmbed: true,\n searchWeight: 0.9,\n description: \"React documentation\",\n searchPriority: 8,\n },\n {\n domain: \"react.dev\",\n category: \"programming\",\n canEmbed: true,\n searchWeight: 0.9,\n description: \"New React documentation\",\n searchPriority: 8,\n },\n\n // Academic & Educational Platforms\n {\n domain: \"coursera.org\",\n category: \"educational\",\n canEmbed: false,\n searchWeight: 0.9,\n description: \"Online courses from universities\",\n searchPriority: 8,\n },\n {\n domain: \"edx.org\",\n category: \"educational\",\n canEmbed: false,\n searchWeight: 0.9,\n description: \"University-level online courses\",\n searchPriority: 8,\n },\n {\n domain: \"mit.edu\",\n category: \"academic\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"MIT resources and OpenCourseWare\",\n searchPriority: 9,\n },\n {\n domain: \"stanford.edu\",\n category: \"academic\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"Stanford University resources\",\n searchPriority: 9,\n },\n {\n domain: \"harvard.edu\",\n category: \"academic\",\n canEmbed: true,\n searchWeight: 0.95,\n description: \"Harvard University resources\",\n searchPriority: 9,\n },\n {\n domain: \"cambridge.org\",\n category: \"academic\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"Cambridge University Press\",\n searchPriority: 9,\n },\n {\n domain: \"oxford.edu\",\n category: \"academic\",\n canEmbed: true,\n searchWeight: 0.95,\n description: \"Oxford University resources\",\n searchPriority: 9,\n },\n\n // Reference & Dictionaries\n {\n domain: \"merriam-webster.com\",\n category: \"reference\",\n canEmbed: true,\n searchWeight: 0.9,\n description: \"Dictionary and thesaurus\",\n searchPriority: 8,\n },\n {\n domain: \"dictionary.com\",\n category: \"reference\",\n canEmbed: false,\n searchWeight: 0.85,\n description: \"Online dictionary\",\n searchPriority: 7,\n },\n {\n domain: \"thesaurus.com\",\n category: \"reference\",\n canEmbed: false,\n searchWeight: 0.85,\n description: \"Online thesaurus\",\n searchPriority: 7,\n },\n {\n domain: \"grammarly.com\",\n category: \"reference\",\n canEmbed: false,\n searchWeight: 0.8,\n description: \"Grammar and writing guide\",\n searchPriority: 6,\n },\n\n // Government & Official Sources\n {\n domain: \"nasa.gov\",\n category: \"government\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"NASA space and science resources\",\n searchPriority: 9,\n },\n {\n domain: \"noaa.gov\",\n category: \"government\",\n canEmbed: true,\n searchWeight: 0.9,\n description: \"Weather and climate data\",\n searchPriority: 8,\n },\n {\n domain: \"usgs.gov\",\n category: \"government\",\n canEmbed: false,\n searchWeight: 0.9,\n description: \"Geological survey data\",\n searchPriority: 8,\n },\n {\n domain: \"nih.gov\",\n category: \"government\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"National Institutes of Health\",\n searchPriority: 9,\n },\n {\n domain: \"cdc.gov\",\n category: \"government\",\n canEmbed: true,\n searchWeight: 0.95,\n description: \"Centers for Disease Control\",\n searchPriority: 9,\n },\n {\n domain: \"archives.gov\",\n category: \"government\",\n canEmbed: false,\n searchWeight: 0.85,\n description: \"National Archives\",\n searchPriority: 7,\n },\n\n // Additional Educational Resources\n {\n domain: \"quizlet.com\",\n category: \"educational\",\n canEmbed: true,\n searchWeight: 0.8,\n description: \"Study sets and flashcards\",\n searchPriority: 7,\n },\n {\n domain: \"sparknotes.com\",\n category: \"educational\",\n canEmbed: false,\n searchWeight: 0.75,\n description: \"Study guides and summaries\",\n searchPriority: 6,\n },\n {\n domain: \"cliffsnotes.com\",\n category: \"educational\",\n canEmbed: false,\n searchWeight: 0.75,\n description: \"Literature study guides\",\n searchPriority: 6,\n },\n {\n domain: \"purplemath.com\",\n category: \"mathematics\",\n canEmbed: false,\n searchWeight: 0.85,\n description: \"Algebra lessons and help\",\n searchPriority: 7,\n },\n {\n domain: \"mathplanet.com\",\n category: \"mathematics\",\n canEmbed: false,\n searchWeight: 0.8,\n description: \"Math courses for high school\",\n searchPriority: 6,\n },\n\n // Stack Exchange Network\n {\n domain: \"math.stackexchange.com\",\n category: \"mathematics\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"Mathematics Q&A\",\n searchPriority: 9,\n },\n {\n domain: \"physics.stackexchange.com\",\n category: \"science\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"Physics Q&A\",\n searchPriority: 9,\n },\n {\n domain: \"chemistry.stackexchange.com\",\n category: \"science\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"Chemistry Q&A\",\n searchPriority: 9,\n },\n {\n domain: \"biology.stackexchange.com\",\n category: \"science\",\n canEmbed: false,\n searchWeight: 0.95,\n description: \"Biology Q&A\",\n searchPriority: 9,\n },\n {\n domain: \"english.stackexchange.com\",\n category: \"reference\",\n canEmbed: false,\n searchWeight: 0.9,\n description: \"English language Q&A\",\n searchPriority: 8,\n },\n];\n\n/**\n * Get all allowed domains for quick lookup\n */\nexport function getAllowedDomains(): string[] {\n return EDUCATIONAL_DOMAINS.map((d) => d.domain);\n}\n\n/**\n * Check if a URL is from an allowed educational domain\n */\nexport function isAllowedDomain(url: string): boolean {\n try {\n const urlObj = new URL(url);\n const hostname = urlObj.hostname.toLowerCase();\n\n return EDUCATIONAL_DOMAINS.some((config) => {\n const domain = config.domain.toLowerCase();\n // Check for exact match or subdomain match\n return (\n hostname === domain ||\n hostname.endsWith(\".\" + domain) ||\n hostname === \"www.\" + domain\n );\n });\n } catch {\n return false;\n }\n}\n\n/**\n * Get domain configuration by URL\n */\nexport function getDomainConfig(url: string): DomainConfig | null {\n try {\n const urlObj = new URL(url);\n const hostname = urlObj.hostname.toLowerCase();\n\n return (\n EDUCATIONAL_DOMAINS.find((config) => {\n const domain = config.domain.toLowerCase();\n return (\n hostname === domain ||\n hostname.endsWith(\".\" + domain) ||\n hostname === \"www.\" + domain\n );\n }) || null\n );\n } catch {\n return null;\n }\n}\n\n/**\n * Get domains by category\n */\nexport function getDomainsByCategory(category: DomainCategory): DomainConfig[] {\n return EDUCATIONAL_DOMAINS.filter((d) => d.category === category);\n}\n\n/**\n * Get search-optimized domain list\n */\nexport function getSearchDomains(): string[] {\n return EDUCATIONAL_DOMAINS.filter((d) => d.searchWeight >= 0.8)\n .sort((a, b) => b.searchPriority - a.searchPriority)\n .map((d) => d.domain);\n}\n","\"use client\";\n\nimport { useCallback, useEffect, useMemo, useRef, useState } from \"react\";\nimport { isAllowedDomain } from \"@/lib/domains-config\";\n\nexport default function Browser() {\n const [query, setQuery] = useState(\"\");\n const [url, setUrl] = useState(\"\");\n const iframeRef = useRef(null);\n const [version, setVersion] = useState(0); // force reload key\n const [suggestions, setSuggestions] = useState<\n Array<{\n title: string;\n url: string;\n provider: string;\n snippet?: string;\n relevance?: number;\n isAllowed?: boolean;\n }>\n >([]);\n const [isLoading, setIsLoading] = useState(false);\n const [showSuggestions, setShowSuggestions] = useState(false);\n const [activeIndex, setActiveIndex] = useState(-1);\n const abortRef = useRef(null);\n const [readerHtml, setReaderHtml] = useState(null);\n const [isReaderMode, setIsReaderMode] = useState(false);\n const [isReaderLoading, setIsReaderLoading] = useState(false);\n const [readerError, setReaderError] = useState(null);\n const [activeUrl, setActiveUrl] = useState(null);\n const [canEmbed, setCanEmbed] = useState(null);\n const [blockedNavigation, setBlockedNavigation] = useState(\n null\n );\n\n const canGo = useMemo(() => query.trim().length > 0, [query]);\n\n const navigate = useCallback((nextUrl: string) => {\n // Security check: Only allow navigation to approved educational domains\n if (!isAllowedDomain(nextUrl)) {\n setBlockedNavigation(nextUrl);\n // Show warning for 3 seconds\n setTimeout(() => setBlockedNavigation(null), 3000);\n return;\n }\n\n setUrl(nextUrl);\n setActiveUrl(nextUrl);\n // Reset reader mode for new navigation\n setIsReaderMode(false);\n setCanEmbed(null);\n setReaderHtml(null);\n setReaderError(null);\n setBlockedNavigation(null);\n }, []);\n\n const onSubmit = useCallback(\n (e: React.FormEvent) => {\n e.preventDefault();\n // If we have a highlighted suggestion or any suggestions, open best match\n const chosen =\n (activeIndex >= 0 && suggestions[activeIndex]) || suggestions[0];\n if (chosen?.url) {\n navigate(chosen.url);\n setShowSuggestions(false);\n return;\n }\n // If user entered a URL directly\n const raw = query.trim();\n if (/^https?:\\/\\//i.test(raw)) {\n navigate(raw);\n }\n },\n [query, navigate, suggestions, activeIndex]\n );\n\n const onReload = useCallback(() => {\n setVersion((v) => v + 1);\n }, []);\n\n const viewerUrl = useMemo(() => {\n // Prioritize activeUrl if set, otherwise use url\n return activeUrl || url || \"\";\n }, [activeUrl, url]);\n\n // Auto-detect if we can embed and auto-switch to reader mode if needed\n useEffect(() => {\n let cancelled = false;\n async function check() {\n const target = viewerUrl;\n if (!/^https?:\\/\\//i.test(target)) return;\n\n try {\n const res = await fetch(\n `/api/can-embed?url=${encodeURIComponent(target)}`,\n {\n cache: \"no-store\",\n }\n );\n const data = (await res.json()) as { canEmbed: boolean };\n if (!cancelled) {\n setCanEmbed(data.canEmbed);\n // Auto-switch to reader mode if can't embed\n if (data.canEmbed === false) {\n setIsReaderMode(true);\n }\n }\n } catch {\n // On error, assume we can try to embed\n if (!cancelled) {\n setCanEmbed(true);\n }\n }\n }\n void check();\n return () => {\n cancelled = true;\n };\n }, [viewerUrl]);\n\n const loadReader = useCallback(async () => {\n setReaderError(null);\n setReaderHtml(null);\n setIsReaderLoading(true);\n try {\n const target = viewerUrl;\n if (!/^https?:\\/\\//i.test(target)) {\n setReaderError(\"Enter a full URL or open a result first.\");\n return;\n }\n const res = await fetch(`/api/reader?url=${encodeURIComponent(target)}`, {\n cache: \"no-store\",\n });\n\n if (!res.ok) {\n const errorData = await res.json().catch(() => ({}));\n const errorMessage =\n errorData.message || errorData.details || `HTTP ${res.status}`;\n throw new Error(errorMessage);\n }\n\n const data = (await res.json()) as { html?: string; title?: string };\n setReaderHtml(data.html || \"\");\n } catch (error) {\n const errorMessage =\n (error as Error).message || \"Unable to load this page in reader mode.\";\n setReaderError(errorMessage);\n } finally {\n setIsReaderLoading(false);\n }\n }, [viewerUrl]);\n\n useEffect(() => {\n if (isReaderMode) {\n void loadReader();\n }\n }, [isReaderMode, loadReader]);\n\n // Debounced search with improved accuracy\n useEffect(() => {\n const q = query.trim();\n if (q.length < 2) {\n setSuggestions([]);\n setShowSuggestions(false);\n setActiveIndex(-1);\n if (abortRef.current) abortRef.current.abort();\n return;\n }\n const handle = setTimeout(async () => {\n try {\n if (abortRef.current) abortRef.current.abort();\n const controller = new AbortController();\n abortRef.current = controller;\n setIsLoading(true);\n\n const res = await fetch(`/api/search?q=${encodeURIComponent(q)}`, {\n signal: controller.signal,\n cache: \"no-store\",\n });\n if (!res.ok) throw new Error(\"search failed\");\n const data = (await res.json()) as {\n results: Array<{\n title: string;\n url: string;\n provider: string;\n snippet?: string;\n relevance?: number;\n isAllowed?: boolean;\n }>;\n totalFound?: number;\n filtered?: number;\n };\n setSuggestions(data.results || []);\n setShowSuggestions(true);\n setActiveIndex(-1);\n } catch (err) {\n if ((err as Error)?.name !== \"AbortError\") {\n setSuggestions([]);\n setShowSuggestions(false);\n setActiveIndex(-1);\n }\n } finally {\n setIsLoading(false);\n }\n }, 250);\n return () => clearTimeout(handle);\n }, [query]);\n\n const onKeyDown = useCallback(\n (e: React.KeyboardEvent) => {\n if (!showSuggestions || suggestions.length === 0) return;\n if (e.key === \"ArrowDown\") {\n e.preventDefault();\n setActiveIndex((i) => (i + 1) % suggestions.length);\n } else if (e.key === \"ArrowUp\") {\n e.preventDefault();\n setActiveIndex((i) => (i <= 0 ? suggestions.length - 1 : i - 1));\n } else if (e.key === \"Enter\") {\n // Handled by form submit\n } else if (e.key === \"Escape\") {\n setShowSuggestions(false);\n setActiveIndex(-1);\n }\n },\n [showSuggestions, suggestions.length]\n );\n\n const handleSuggestionClick = useCallback(\n (idx: number) => {\n const s = suggestions[idx];\n if (s) {\n navigate(s.url);\n }\n },\n [suggestions, navigate]\n );\n\n return (\n
\n \n
\n setQuery(e.target.value)}\n aria-label=\"Search or URL\"\n />\n
\n \n Go\n \n \n Reload\n \n {viewerUrl && (\n setIsReaderMode((v) => !v)}\n aria-pressed={isReaderMode}\n aria-label=\"Toggle reader mode\"\n >\n Reader\n \n )}\n \n
\n
\n {s.snippet && (\n
\n {s.snippet}\n
\n )}\n
\n {s.url}\n
\n \n ))}\n {isLoading ? (\n
  • \n Searching…\n
    • \n ) : null}\n \n )}\n \n
    \n
    \n {!viewerUrl ? (\n
    \n
    \n Select a search result to view\n
    \n
    \n ) : isReaderMode ? (\n
    \n {isReaderLoading ? (\n
    \n
    \n Loading reader mode...\n
    \n
    \n ) : readerError ? (\n
    \n
    {readerError}
    \n
    \n ) : readerHtml ? (\n
    \n ) : (\n
    \n
    \n No content available\n
    \n
    \n )}\n
    \n ) : (\n <>\n \n
    \n \n )}\n
    \n
    \n {blockedNavigation ? (\n \n ⚠️ Navigation blocked: Only educational sites are allowed.\n \n ) : canEmbed === false ? (\n \"This site blocks embedding. Using reader mode for safe viewing.\"\n ) : (\n \"Some sites may automatically switch to reader mode if they block embedding.\"\n )}\n
    \n
    \n
    \n \n 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