curl -X POST "https://api.usegately.com/api/v1/campaigns/upload-attachment" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "X-Project-ID: YOUR_PROJECT_ID" \
  -F "file=@/path/to/report.pdf"

import { GatelyCampaigns } from '@gately/sdk'

const campaigns = new GatelyCampaigns({ projectId: 'YOUR_PROJECT_ID' })

const fileInput = document.querySelector<HTMLInputElement>('#file-input')
const file = fileInput!.files![0]

const { attachment } = await campaigns.uploadAttachment(file)

// Pass directly into send()
await campaigns.send({
  name: 'Monthly Report',
  subject: 'Your report is attached',
  content: '<p>Please find your report attached.</p>',
  recipient_emails: ['user@example.com'],
  attachments: [attachment],
})

{
  "success": true,
  "attachment": {
    "content": "JVBERi0xLjQKJcOkw7zDtsO...",
    "filename": "report.pdf",
    "type": "application/pdf",
    "size": 204800,
    "disposition": "attachment"
  },
  "message": "File uploaded successfully"
}

{
  "error": "File size exceeds 10 MB limit"
}

{
  "error": "File type application/zip is not allowed"
}