fix: enforce asset naming convention

lib/validate-folder.ts

@@ -3,6 +3,7 @@
 // ---------------------------------------------------------------------------
 
 import { ASSET_EXTENSIONS, TEXTURE_EXTENSIONS } from '@/lib/constants'
+import { formatAssetFamilies, getAssetFamily } from '@/lib/asset-naming'
 import type { TextureFile } from '@/lib/client-types'
 
 const SUPPORT_FILE_EXT_ARRAY = [...TEXTURE_EXTENSIONS, ...ASSET_EXTENSIONS]
@@ -33,6 +34,32 @@ function getReferencedBufferNames(gltf: GltfJson) {
     .filter((filename): filename is string => Boolean(filename))
 }
 
+function getFileExtension(filename: string) {
+  return filename.slice(filename.lastIndexOf('.')).toLowerCase()
+}
+
+function getFileStem(filename: string) {
+  return filename.replace(/\.[^.]+$/, '')
+}
+
+function getTextureNamingError(file: File) {
+  const stem = getFileStem(file.name)
+  const [prefix, ...targetParts] = stem.split('_')
+  const family = getAssetFamily(prefix)
+
+  if (family && targetParts.every(Boolean)) return null
+
+  const reversedParts = stem.split('_')
+  const reversedFamily = reversedParts.length > 1 ? getAssetFamily(reversedParts[reversedParts.length - 1]) : undefined
+
+  if (reversedFamily) {
+    const target = reversedParts.slice(0, -1).join('_')
+    return `Convention invalide : ${file.name}. Utilisez ${reversedFamily}_${target}.${file.name.split('.').pop()} pour cibler "${target}", ou ${reversedFamily}.${file.name.split('.').pop()} pour tout le modele.`
+  }
+
+  return `Asset inconnu : ${file.name}. Familles autorisees : ${formatAssetFamilies()}. Utilisez asset.png pour tout le modele ou asset_objet.png pour cibler un objet.`
+}
+
 async function getGltfWarnings(model: File, supportFiles: File[]) {
   const warnings: string[] = []
   let parsed: unknown
@@ -82,10 +109,17 @@ export async function validateFolder(files: File[]): Promise<ValidationResult> {
   }
 
   const supportFiles = files.filter((f) => {
-    const ext = f.name.slice(f.name.lastIndexOf('.')).toLowerCase()
+    const ext = getFileExtension(f.name)
     return SUPPORT_FILE_EXT_ARRAY.includes(ext)
   })
 
+  const textureNamingErrors = supportFiles
+    .filter((file) => TEXTURE_EXTENSIONS.has(getFileExtension(file.name)))
+    .map(getTextureNamingError)
+    .filter((error): error is string => Boolean(error))
+
+  errors.push(...textureNamingErrors)
+
   for (const tf of supportFiles) {
     textures.push({ name: tf.name, file: tf })
   }