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=====================================================================\n// Aliada · Partir / Fusionar PDF\n// Deploy en Val Town (https://www.val.town) como \"HTTP val\"\n// ---------------------------------------------------------------------\n// MODO PARTIR (Content-Type: application/pdf, body = PDF crudo)\n// Devuelve: { numPages, pages: [, ...], numeros: [, ...] }\n//\n// MODO FUSIONAR (Content-Type: application/json, body = { pages: [, ...] })\n// Devuelve: { merged: }\n// =====================================================================\n\nimport { PDFDocument } from \"https://esm.sh/pdf-lib@1.17.1\";\nimport { extractText, getDocumentProxy } from \"https://esm.sh/unpdf\";\n\nfunction bytesToBase64(bytes) {\n let bin = \"\";\n const chunk = 0x8000;\n for (let j = 0; j < bytes.length; j += chunk) {\n bin += String.fromCharCode(...bytes.subarray(j, j + chunk));\n }\n return btoa(bin);\n}\n\nexport default async function (req) {\n if (req.method !== \"POST\") {\n return new Response(\"Usa POST con el PDF en el body\", { status: 405 });\n }\n\n const contentType = req.headers.get(\"content-type\") || \"\";\n\n // ---------- MODO FUSIONAR: junta varios PDFs (uno por página) en uno solo ----------\n if (contentType.includes(\"application/json\")) {\n try {\n const { pages: pagesB64 } = await req.json();\n const out = await PDFDocument.create();\n\n for (const b64 of pagesB64 || []) {\n const bytes = Uint8Array.from(atob(b64), (c) => c.charCodeAt(0));\n const src = await PDFDocument.load(bytes, { ignoreEncryption: true });\n const copied = await out.copyPages(src, src.getPageIndices());\n copied.forEach((p) => out.addPage(p));\n }\n\n const mergedBytes = await out.save();\n return Response.json({\n merged: bytesToBase64(new Uint8Array(mergedBytes)),\n });\n } catch (e) {\n return new Response(JSON.stringify({ error: String(e) }), {\n status: 500,\n headers: { \"content-type\": \"application/json\" },\n });\n }\n }\n\n // ---------- MODO PARTIR: divide el PDF en páginas y lee el \"Número:\" de cada una ----------\n try {\n const bytes = new Uint8Array(await req.arrayBuffer());\n const src = await PDFDocument.load(bytes, { ignoreEncryption: true });\n const n = src.getPageCount();\n\n const pages = [];\n const numeros = [];\n\n for (let i = 0; i < n; i++) {\n const out = await PDFDocument.create();\n const [pg] = await out.copyPages(src, [i]);\n out.addPage(pg);\n const outBytes = await out.save();\n\n let numero = null;\n try {\n const pdfProxy = await getDocumentProxy(outBytes.slice()); // copia, para no dejar sin uso el buffer original\n const { text } = await extractText(pdfProxy, { mergePages: true });\n const m = text.match(/N[uú]mero:\\s*(\\S+)/i);\n if (m) numero = m[1];\n } catch (_e) {\n // si falla la lectura de texto, seguimos con numero = null\n // (el flujo en n8n cae al comportamiento actual, sin fusionar)\n }\n numeros.push(numero);\n\n pages.push(bytesToBase64(new Uint8Array(outBytes)));\n }\n\n return Response.json({ numPages: n, pages, numeros });\n } catch (e) {\n return new Response(JSON.stringify({ error: String(e) }), {\n status: 500,\n headers: { \"content-type\": \"application/json\" },\n });\n }\n}","// =====================================================================\n// Aliada · Partir PDF\n// Deploy en Val Town (https://www.val.town) como \"HTTP val\"\n// ---------------------------------------------------------------------\n// Content-Type: application/pdf, body = PDF crudo\n// Devuelve: { numPages, pages: [, ...], numeros: [, ...] }\n// =====================================================================\n\nimport { PDFDocument } from \"https://esm.sh/pdf-lib@1.17.1\";\nimport { extractText, getDocumentProxy } from \"https://esm.sh/unpdf\";\n\nfunction bytesToBase64(bytes) {\n let bin = \"\";\n const chunk = 0x8000;\n for (let j = 0; j < bytes.length; j += chunk) {\n bin += String.fromCharCode(...bytes.subarray(j, j + chunk));\n }\n return btoa(bin);\n}\n\nexport default async 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Diff · v7