feat: persist metafield resolutions across sessions

Les associations colonne→métachamp sont sauvegardées dans data/metafield-resolutions.json
et rechargées automatiquement à la prochaine création de produits.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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

@@ -0,0 +1,20 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+import { loadResolutionCache, saveResolutionCache } from '@/lib/resolutionCache'
+import type { MetafieldResolution } from '@/types/creation'
+
+export async function GET() {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+  const cache = await loadResolutionCache()
+  return NextResponse.json(cache)
+}
+
+export async function PUT(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ error: 'Non authentifié' }, { status: 401 })
+  const body = await req.json() as Record<string, MetafieldResolution>
+  await saveResolutionCache(body)
+  return NextResponse.json({ ok: true })
+}

src/components/creation/MetafieldResolver.tsx

@@ -18,25 +18,28 @@ export function MetafieldResolver({ specificColumns, onResolved }: Props) {
   const [searches, setSearches] = useState<Record<string, string>>({})
   const [openDropdown, setOpenDropdown] = useState<string | null>(null)
   const dropdownRef = useRef<HTMLDivElement>(null)
+  const saveTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null)
 
   useEffect(() => {
     if (specificColumns.length === 0) { setLoading(false); onResolved([]); return }
     const params = specificColumns.map(c => encodeURIComponent(c)).join(',')
-    fetch(`/api/creation/metafields?columns=${params}`)
-      .then(r => r.json())
-      .then(data => {
+    Promise.all([
+      fetch(`/api/creation/metafields?columns=${params}`).then(r => r.json()),
+      fetch('/api/creation/resolutions').then(r => r.json()),
+    ])
+      .then(([data, cache]: [{ error?: string; definitions: MetafieldDefinition[]; matched: Record<string, MetafieldResolution>; unmatched: string[] }, Record<string, MetafieldResolution>]) => {
         if (data.error) throw new Error(data.error)
         setDefinitions(data.definitions)
         setMatched(data.matched)
         setUnmatched(data.unmatched)
         const init: Record<string, MetafieldResolution> = { ...data.matched }
-        // Défaut : 'skip' — l'utilisateur choisit explicitement ce qu'il veut créer
         data.unmatched.forEach((col: string) => {
-          init[col] = { columnHeader: col, action: 'skip', namespace: 'custom', key: normalizeMetafieldKey(col) }
+          // Utilise le cache persisté si disponible, sinon 'skip' par défaut
+          init[col] = cache[col] ?? { columnHeader: col, action: 'skip', namespace: 'custom', key: normalizeMetafieldKey(col) }
         })
         setResolutions(init)
       })
-      .catch(e => setError(e.message))
+      .catch(e => setError((e as Error).message))
       .finally(() => setLoading(false))
   // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [specificColumns.join(',')])
@@ -47,7 +50,19 @@ export function MetafieldResolver({ specificColumns, onResolved }: Props) {
   }, [resolutions, loading])
 
   const updateResolution = (col: string, partial: Partial<MetafieldResolution>) => {
-    setResolutions(prev => ({ ...prev, [col]: { ...prev[col], ...partial } }))
+    setResolutions(prev => {
+      const next = { ...prev, [col]: { ...prev[col], ...partial } }
+      // Sauvegarde en différé pour éviter un appel par frappe
+      if (saveTimeoutRef.current) clearTimeout(saveTimeoutRef.current)
+      saveTimeoutRef.current = setTimeout(() => {
+        fetch('/api/creation/resolutions', {
+          method: 'PUT',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify(next),
+        }).catch(() => null)
+      }, 800)
+      return next
+    })
   }
 
   const filteredDefs = (col: string) => {

src/lib/resolutionCache.ts

@@ -0,0 +1,20 @@
+import { readFile, writeFile, mkdir } from 'fs/promises'
+import { join } from 'path'
+import type { MetafieldResolution } from '@/types/creation'
+
+const CACHE_DIR = join(process.cwd(), 'data')
+const CACHE_FILE = join(CACHE_DIR, 'metafield-resolutions.json')
+
+export async function loadResolutionCache(): Promise<Record<string, MetafieldResolution>> {
+  try {
+    const raw = await readFile(CACHE_FILE, 'utf-8')
+    return JSON.parse(raw) as Record<string, MetafieldResolution>
+  } catch {
+    return {}
+  }
+}
+
+export async function saveResolutionCache(cache: Record<string, MetafieldResolution>): Promise<void> {
+  await mkdir(CACHE_DIR, { recursive: true })
+  await writeFile(CACHE_FILE, JSON.stringify(cache, null, 2), 'utf-8')
+}