gamma-core-workflow-b

# Gamma Core Workflow B: Editing and Export ## Overview Implement workflows for editing existing presentations and exporting to various formats. ## Prerequisites - Completed `gamma-core-workflow-a` setup - Existing presentation to work with - Understanding of export formats ## Instructions ### Step 1: Retrieve and Edit Presentation ```typescript import { GammaClient } from '@gamma/sdk'; const gamma = new GammaClient({ apiKey: process.env.GAMMA_API_KEY }); async function editPresentation(presentationId: string) { // Retrieve existing presentation const presentation = await gamma.presentations.get(presentationId); // Update title and style const updated = await gamma.presentations.update(presentationId, { title: 'Updated: ' + presentation.title, style: 'modern', }); return updated; } ``` ### Step 2: Slide-Level Editing ```typescript async function editSlide(presentationId: string, slideIndex: number, content: object) { const presentation = await gamma.presentations.get(presentationId); // Update specific slide const updatedSlide = await gamma.slides.update( presentationId, slideIndex, { title: content.title, content: content.body, layout: content.layout || 'content', } ); return updatedSlide; } async function addSlide(presentationId: string, position: number, content: object) { return gamma.slides.insert(presentationId, position, { title: content.title, content: content.body, generateImage: content.imagePrompt, }); } async function deleteSlide(presentationId: string, slideIndex: number) { return gamma.slides.delete(presentationId, slideIndex); } ``` ### Step 3: Export to Various Formats ```typescript type ExportFormat = 'pdf' | 'pptx' | 'png' | 'html'; async function exportPresentation( presentationId: string, format: ExportFormat, options: object = {} ) { const exportJob = await gamma.exports.create(presentationId, { format, quality: options.quality || 'high', includeNotes: options.includeNotes ?? true, ...options, }); // Wait for export to complete const result = await gamma.exports.wait(exportJob.id, { timeout: 60000, pollInterval: 2000, }); return result.downloadUrl; } // Usage examples const pdfUrl = await exportPresentation('pres-123', 'pdf'); const pptxUrl = await exportPresentation('pres-123', 'pptx', { includeNotes: false }); const pngUrl = await exportPresentation('pres-123', 'png', { slideIndex: 0 }); // First slide only ``` ### Step 4: Asset Management ```typescript async function uploadAsset(presentationId: string, filePath: string) { const fileBuffer = await fs.readFile(filePath); const asset = await gamma.assets.upload(presentationId, { file: fileBuffer, filename: path.basename(filePath), type: 'image', }); return asset.url; } async function listAssets(presentationId: string) { return gamma.assets.list(presentationId); } ``` ## Output - Updated presentation with modifications - Exported files in various formats - Managed presentation assets - Download URLs for exports ## Error Handling | Error | Cause | Solution | |-------|-------|----------| | Export Timeout | Large presentation | Increase timeout or reduce slides | | Format Not Supported | Invalid export format | Check supported formats | | Asset Too Large | File exceeds limit | Compress or resize image | | Slide Not Found | Invalid index | Verify slide exists | ## Resources - [Gamma Export API](https://gamma.app/docs/export) - [Gamma Asset Management](https://gamma.app/docs/assets) ## Next Steps Proceed to `gamma-common-errors` for error handling patterns.