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",[],[99],"files",[150],"counts",{"_173":32,"_174":175,"_176":32,"_177":32},"pulls","branches",1,"forks","envVars","contents",[],"file",{"_104":151,"_155":138,"_152":153,"_95":99,"_162":163,"_160":161,"_100":159,"_154":-5,"_106":182,"_156":101,"_165":-5,"_98":183},["D",1758030311357],[99],"upstreamProject","upstreamBranch","emptyEnvVars","isNew","flags",[],"routes/_app.x.$handle.$name.branch.$branch.version.$version.code.$",{"_93":94,"_95":96,"_97":43,"_100":101,"_98":99,"_102":192,"_148":197,"_169":201,"_180":202,"_178":205,"_206":-5,"_207":22,"_208":-5,"_209":-5,"_210":-5,"_211":212},{"_104":105,"_95":96,"_106":193,"_108":-5,"_109":22,"_110":111,"_112":-5,"_113":-5,"_14":114,"_115":-5,"_116":22,"_117":-5,"_118":32,"_16":119,"_120":121,"_122":121,"_123":124,"_125":124,"_126":124,"_127":121,"_128":121,"_23":194,"_132":195,"_135":196,"_147":22},["D",1758002355055],{"_93":94,"_130":131},{"_93":94,"_134":131},{"_100":137,"_95":43,"_104":138,"_139":105,"_140":-5,"_141":-5,"_142":-5,"_143":-5,"_144":-5,"_145":96,"_146":94},[198],{"_104":151,"_95":99,"_152":153,"_154":-5,"_155":138,"_156":101,"_157":22,"_106":158,"_100":159,"_160":161,"_162":163,"_164":22,"_165":-5,"_166":199,"_98":200},[],[99],[198],{"_104":151,"_155":138,"_152":153,"_95":99,"_162":163,"_160":161,"_100":159,"_154":-5,"_106":203,"_156":101,"_165":-5,"_98":204},["D",1758030311357],[99],[],"upstream","showCompareCallout","pull","ahead","behind","templates",[],"actionData","errors"]