canva-core-workflow-b

# Canva Core Workflow B — Assets, Autofill & Folders ## Overview Secondary workflow: upload assets to Canva, autofill brand templates with dynamic data (text, images, charts), and organize content with folders. Autofill requires a Canva Enterprise organization. ## Prerequisites - Completed `canva-install-auth` with valid access token - Scopes: `asset:read`, `asset:write`, `brandtemplate:meta:read`, `brandtemplate:content:read`, `design:content:write`, `folder:read`, `folder:write` ## Asset Management ### Upload an Asset (Binary) ```typescript // POST https://api.canva.com/rest/v1/asset-uploads // Rate limit: 30 req/min per user // Scope: asset:write // Content-Type: application/octet-stream import { readFileSync } from 'fs'; async function uploadAsset( filePath: string, name: string, token: string ): Promise<{ id: string; status: string }> { // Asset name must be Base64-encoded, max 50 chars unencoded const nameBase64 = Buffer.from(name).toString('base64'); const fileData = readFileSync(filePath); const res = await fetch('https://api.canva.com/rest/v1/asset-uploads', { method: 'POST', headers: { 'Authorization': `Bearer ${token}`, 'Content-Type': 'application/octet-stream', 'Asset-Upload-Metadata': JSON.stringify({ name_base64: nameBase64 }), }, body: fileData, }); if (!res.ok) throw new Error(`Upload failed: ${res.status}`); return res.json(); } // Upload returns a job — poll for asset ID const uploadJob = awa...