Prerequisite Tree Generator

\n\n\n`;\n}\n\nexport default async function (req: Request): Promise {\n const url = new URL(req.url);\n const path = url.pathname;\n const headers = { \"Content-Type\": \"application/json\" };\n\n try {\n if (req.method === \"POST\" && path.endsWith(\"/start\")) {\n const { fact } = await req.json();\n if (!fact || typeof fact !== \"string\" || fact.trim().length === 0) {\n throw new Error(\"A valid, non-empty 'fact' string is required.\");\n }\n\n const jobId = nanoid();\n const rootNode: FactNode = {\n id: nanoid(),\n fact: fact,\n children: [],\n depth: 0,\n };\n\n await blob.setJSON(jobId, { status: \"processing\", tree: rootNode });\n\n buildTreeInBackground(jobId, rootNode);\n\n return new Response(JSON.stringify({ jobId }), { headers });\n }\n\n if (req.method === \"GET\" && path.endsWith(\"/status\")) {\n const jobId = url.searchParams.get(\"jobId\");\n if (!jobId) {\n throw new Error(\"A 'jobId' query parameter is required.\");\n }\n const state = (await blob.getJSON(jobId)) ||\n { status: \"error\", error: \"Job not found.\" };\n return new Response(JSON.stringify(state), { headers });\n }\n\n if (req.method === \"GET\" && path === \"/\") {\n const sourceUrl = `https://${url.hostname}${\n url.pathname.substring(0, url.pathname.lastIndexOf(\"/\"))\n }`;\n return new Response(generateHtml(sourceUrl), {\n headers: { \"Content-Type\": \"text/html\" },\n });\n }\n } catch (error) {\n const errorMessage = error instanceof Error\n ? error.message\n : \"An unknown server error occurred.\";\n return new Response(JSON.stringify({ error: errorMessage }), {\n status: 400,\n headers,\n });\n }\n\n return new Response(JSON.stringify({ error: \"Not Found\" }), {\n status: 404,\n headers,\n });\n}","deleted","label","children",[],[150],"files",[148],"counts",{"_173":32,"_174":175,"_176":32,"_177":32},"pulls","branches",1,"forks","envVars","contents",[180],{"_102":149,"_95":150,"_151":152,"_153":-5,"_154":136,"_155":135,"_156":157,"_104":181,"_99":159,"_160":161,"_162":163,"_164":22,"_165":-5,"_98":182},["D",1758034879415],[150],"file","upstreamProject","upstreamBranch","emptyEnvVars","isNew","flags",[],"routes/_app.x.$handle.$name._index",{"_93":94,"_95":96,"_97":-7,"_99":-7,"_100":192,"_178":197,"_200":-7,"_201":-5,"_202":-5,"_169":203,"_207":208},{"_102":103,"_95":96,"_104":193,"_106":-5,"_107":22,"_108":109,"_110":-5,"_111":-5,"_14":112,"_113":-5,"_114":22,"_115":-5,"_116":32,"_16":117,"_118":119,"_120":119,"_121":122,"_123":122,"_124":122,"_125":119,"_126":119,"_23":194,"_130":195,"_133":196,"_145":22},["D",1758002355055],{"_93":94,"_128":129},{"_93":94,"_132":129},{"_99":135,"_95":43,"_102":136,"_137":103,"_138":-5,"_139":-5,"_140":-5,"_141":-5,"_142":-5,"_143":96,"_144":94},[198],{"_102":149,"_95":150,"_151":152,"_153":-5,"_154":136,"_155":135,"_156":157,"_104":181,"_99":159,"_160":161,"_162":163,"_164":22,"_165":-5,"_98":199},[150],"readme","upstream","pull",[204],{"_102":149,"_95":150,"_151":152,"_153":-5,"_154":136,"_155":135,"_156":157,"_104":158,"_99":159,"_160":161,"_162":163,"_164":22,"_165":-5,"_166":205,"_98":206},[],[150],"previews",[204],"actionData","errors"]