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

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

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

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, # 60000: 1 minute in ms pollInterval: 2000, # 2000: 2 seconds in ms });

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

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

• Gamma Asset Management

Next Steps

Proceed to gamma-common-errors for error handling patterns.

Examples

Basic usage: Apply gamma core workflow b to a standard project setup with default configuration options.

Advanced scenario: Customize gamma core workflow b for production environments with multiple constraints and team-specific requirements.