Wikipedia Family Tree Crawler

\n {isLoading && (\n

\n )}\n \n Generations: {maxDepth}\n

\n View source\n

\n \n );\n}\n\nfunction client() {\n createRoot(document.getElementById(\"root\")).render();\n}\n\nif (typeof document !== \"undefined\") {\n client();\n}\n\nasync function server(req: Request): Promise {\n const url = new URL(req.url);\n\n if (url.pathname === \"/stream\") {\n const wikiUrl = url.searchParams.get(\"url\");\n if (!wikiUrl) {\n return new Response(\"URL parameter is required\", { status: 400 });\n }\n\n const encoder = new TextEncoder();\n const stream = new ReadableStream({\n async start(controller) {\n for await (const data of crawlWikipedia(wikiUrl)) {\n controller.enqueue(encoder.encode(`data: ${JSON.stringify(data)}\\n\\n`));\n }\n controller.close();\n },\n });\n\n return new Response(stream, {\n headers: {\n \"Content-Type\": \"text/event-stream\",\n \"Cache-Control\": \"no-cache\",\n \"Connection\": \"keep-alive\",\n },\n });\n }\n\n return new Response(\n `\n \n \n \n \n \n Wikipedia Family Tree Crawler\n \n \n \n

\n \n \n \n `,\n {\n headers: { \"Content-Type\": \"text/html\" },\n },\n );\n}\n\nconst css = `\n body, html {\n margin: 0;\n padding: 0;\n height: 100%;\n font-family: Arial, sans-serif;\n }\n #root {\n height: 100%;\n }\n h1 {\n margin-top: 0;\n }\n form {\n margin-bottom: 10px;\n }\n input {\n padding: 5px;\n font-size: 16px;\n }\n button {\n padding: 5px 10px;\n font-size: 16px;\n background-color: #4CAF50;\n color: white;\n border: none;\n cursor: pointer;\n }\n button:disabled {\n background-color: #cccccc;\n }\n .spinner {\n border: 4px solid #f3f3f3;\n border-top: 4px solid #3498db;\n border-radius: 50%;\n width: 40px;\n height: 40px;\n animation: spin 1s linear infinite;\n }\n @keyframes spin {\n 0% { transform: rotate(0deg); }\n 100% { transform: rotate(360deg); }\n }\n`;\n\nconst cytoscapeStyle = [\n {\n selector: \"node\",\n style: {\n \"background-color\": \"#666\",\n \"label\": \"data(label)\",\n \"color\": \"#fff\",\n \"text-valign\": \"center\",\n \"text-halign\": \"center\",\n \"text-wrap\": \"wrap\",\n \"text-max-width\": \"100px\",\n \"font-size\": \"10px\",\n \"width\": \"label\",\n \"height\": \"label\",\n \"padding\": \"10px\",\n },\n },\n {\n selector: \"edge\",\n style: {\n \"width\": 2,\n \"line-color\": \"#ccc\",\n \"target-arrow-color\": \"#ccc\",\n \"target-arrow-shape\": \"triangle\",\n \"curve-style\": \"bezier\",\n },\n },\n];\n\nexport default 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