feat(plan5): API POST /api/creation/execute streaming NDJSON

src/app/api/creation/execute/route.ts

@@ -0,0 +1,107 @@
+import { NextRequest } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { fetchPendingProducts } from '@/lib/creationSheets'
+import { generateDescriptions } from '@/lib/openaiClient'
+import { ensureMetafieldDefinition, setProductMetafield } from '@/lib/shopifyMetafields'
+import { addProductToCollection } from '@/lib/shopifyCollections'
+import { createShopifyProduct } from '@/lib/shopifySync'
+import { prisma } from '@/lib/prisma'
+import type { MetafieldResolution, CreationStreamEvent } from '@/types/creation'
+
+function encode(event: CreationStreamEvent): string {
+  return JSON.stringify(event) + '\n'
+}
+
+export async function POST(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) {
+    return new Response(JSON.stringify({ error: 'Non authentifié' }), { status: 401 })
+  }
+
+  const userId = (session.user as { id: string }).id
+  const body = await req.json().catch(() => ({})) as { resolutions?: MetafieldResolution[] }
+  const resolutions: MetafieldResolution[] = body.resolutions ?? []
+  const resolutionMap = new Map<string, MetafieldResolution>(resolutions.map(r => [r.columnHeader, r]))
+
+  const stream = new ReadableStream({
+    async start(controller) {
+      const send = (event: CreationStreamEvent) => controller.enqueue(encode(event))
+      try {
+        const existing = await prisma.productCreation.findMany({ select: { sheetTab: true, sheetRow: true } })
+        const alreadyCreated = new Set(existing.map(e => `${e.sheetTab}:${e.sheetRow}`))
+        const pending = await fetchPendingProducts(alreadyCreated)
+        const total = pending.length
+
+        if (total === 0) {
+          send({ type: 'done', summary: { created: 0, errors: 0, status: 'success' } })
+          controller.close()
+          return
+        }
+
+        // Crée les définitions manquantes en amont
+        for (const resolution of resolutions) {
+          if (resolution.action === 'create') await ensureMetafieldDefinition(resolution)
+        }
+
+        let created = 0
+        let errors = 0
+
+        for (let i = 0; i < pending.length; i++) {
+          const product = pending[i]
+          send({ type: 'progress', current: i + 1, total, tab: product.tab, title: product.title, step: 'Génération descriptions…' })
+          try {
+            const { longDesc } = await generateDescriptions({
+              title: product.title,
+              rawDescription: '',
+              comment: product.comment,
+              vendor: product.vendor,
+              famille: product.famille,
+            })
+            send({ type: 'progress', current: i + 1, total, tab: product.tab, title: product.title, step: 'Création produit Shopify…' })
+            const shopifyId = await createShopifyProduct({
+              ref: product.sku,
+              handle: product.sku.toLowerCase().replace(/[^a-z0-9]+/g, '-'),
+              title: product.title,
+              description: longDesc,
+              price: product.priceActual || '0.00',
+              stock: product.stock,
+              status: 'active',
+            })
+            if (product.collectionId) await addProductToCollection(shopifyId, product.collectionId)
+            if (product.subCollectionId) await addProductToCollection(shopifyId, product.subCollectionId)
+            send({ type: 'progress', current: i + 1, total, tab: product.tab, title: product.title, step: 'Métachamps…' })
+            for (const [colHeader, value] of Object.entries(product.specificFields)) {
+              const resolution = resolutionMap.get(colHeader)
+              if (!resolution || resolution.action === 'skip') continue
+              await setProductMetafield(shopifyId, resolution, value)
+            }
+            await prisma.productCreation.create({
+              data: { userId, sheetTab: product.tab, sheetRow: product.rowNumber, shopifyId, sku: product.sku, title: product.title, status: 'success' },
+            })
+            created++
+          } catch (err) {
+            const message = err instanceof Error ? err.message : 'Erreur inconnue'
+            send({ type: 'error', title: product.title, message })
+            await prisma.productCreation.create({
+              data: { userId, sheetTab: product.tab, sheetRow: product.rowNumber, shopifyId: '', sku: product.sku, title: product.title, status: 'error', errorMessage: message },
+            })
+            errors++
+          }
+        }
+        const status = errors === 0 ? 'success' : created === 0 ? 'error' : 'partial'
+        send({ type: 'done', summary: { created, errors, status } })
+      } catch (err) {
+        const message = err instanceof Error ? err.message : 'Erreur inconnue'
+        send({ type: 'done', summary: { created: 0, errors: 1, status: 'error' } })
+        console.error('[creation/execute]', message)
+      } finally {
+        controller.close()
+      }
+    },
+  })
+
+  return new Response(stream, {
+    headers: { 'Content-Type': 'application/x-ndjson', 'Transfer-Encoding': 'chunked' },
+  })
+}