refactor: clean upload pipeline and restore draco delivery

lib/blender.ts

@@ -0,0 +1,50 @@
+import { join } from 'path'
+import { existsSync } from 'fs'
+import { execFile } from 'child_process'
+import { promisify } from 'util'
+
+const execFileAsync = promisify(execFile)
+
+/**
+ * Compress a GLTF/GLB model using Blender's Draco compression.
+ * Returns { success: true } on success, or { success: false, error } on failure.
+ * GLB Draco is explicit: callers should fail instead of silently pushing heavy assets.
+ */
+export async function compressWithBlender(
+  inputPath: string,
+  outputPath: string,
+): Promise<{ success: boolean; error?: string }> {
+  const blenderPath = process.env.BLENDER_PATH || 'blender'
+  const timeout = Number(process.env.BLENDER_TIMEOUT_MS || 600_000)
+  const scriptPath = join(process.cwd(), 'scripts', 'compress.py')
+
+  if (!existsSync(scriptPath)) {
+    return { success: false, error: 'scripts/compress.py introuvable' }
+  }
+
+  try {
+    await execFileAsync(
+      blenderPath,
+      [
+        '--background',
+        '--python', scriptPath,
+        '--',
+        '-i', inputPath,
+        '-o', outputPath,
+        '--draco-level', '7',
+        '--texture-size', '512',
+        '-q',
+      ],
+      { timeout },
+    )
+
+    if (!existsSync(outputPath)) {
+      return { success: false, error: "Blender n'a pas produit de fichier compresse" }
+    }
+
+    return { success: true }
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err)
+    return { success: false, error: `Compression Blender echouee: ${message}` }
+  }
+}