debut refacto

lib/constants.ts

@@ -0,0 +1,29 @@
+// ---------------------------------------------------------------------------
+// Shared constants — used by both client and server
+// ---------------------------------------------------------------------------
+
+export const MODEL_EXTENSIONS = new Set(['.glb', '.gltf'])
+export const TEXTURE_EXTENSIONS = new Set(['.png', '.jpg', '.jpeg', '.webp'])
+export const ALL_ALLOWED_EXTENSIONS = new Set([...MODEL_EXTENSIONS, ...TEXTURE_EXTENSIONS])
+
+export const REQUIRED_TEXTURES = ['roughness', 'normal', 'metalness', 'color', 'displace'] as const
+
+export const VALID_DESTINATIONS = new Set([
+  'farm', 'map', 'powergrid', 'workshop', 'general', 'environment',
+] as const)
+
+export const DESTINATIONS = [
+  { value: 'farm', label: 'Farm' },
+  { value: 'map', label: 'Map' },
+  { value: 'powergrid', label: 'Powergrid' },
+  { value: 'workshop', label: 'Workshop' },
+  { value: 'general', label: 'General' },
+  { value: 'environment', label: 'Environment' },
+] as const
+
+export type Destination = typeof DESTINATIONS[number]['value']
+
+export const TMP_DIR = '/tmp/assets'
+
+/** Maximum file size in bytes (100 MB) */
+export const MAX_FILE_SIZE = 100 * 1024 * 1024