feat: Google Calendar integration for SIG events

[Spkap]

Google Calendar Integration for SIG Events

Overview

Fixes: #60

Adds Google Calendar integration to display Special Interest Group (SIG) events directly on related blog pages. Calendars render conditionally if the linked SIG has a valid google_calendar_id.

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Backend

• Schema: Added google_calendar_id field to SIG content type (schema.json).
• API:
  • GET /api/sigs – List SIGs with calendar IDs
  • GET /api/sigs/:id – Fetch SIG with calendar data
  • GET /api/sigs?filters[blogs][id][$eq]=:blogId – Fetch SIG by blog

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Frontend

• GoogleCalendar Component (GoogleCalendar.jsx)
  • Takes calendarId as input
  • Builds and sanitizes embed URL (Asia/Kolkata timezone)
  • Responsive iframe with lazy loading
  • Returns null if ID is missing/invalid

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Data Fetching

• Helpers (getSIGs.js)
  • getSIGByBlogId(blogId) → Fetch SIG linked to a blog
  • getAllSIGs() → Fetch all SIGs (sorted)
  • getSIG(sigId) → Fetch individual SIG with calendar data
  • Error handling + Next.js revalidation for caching

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Blog Page Integration (page.js)

1. Load blog data using getBlog(slug) → Extract blog ID
2. Fetch associated SIG via getSIGByBlogId(blog.id)
3. If SIG has google_calendar_id, render GoogleCalendar below blog content
4. Layout preserved with graceful fallback when no calendar exists

Data Flow

Blog Slug →    getBlog(slug) →    Blog Object (ID)
     ↓
Blog ID →    getSIGByBlogId(blog.id) →    SIG Object
     ↓
SIG.google_calendar_id →    Calendar Component →    Embedded Google Calendar

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Usage

• Admins add google_calendar_id in Strapi SIG entry.
• Link SIG to blog posts.
• Calendar auto-renders on those blogs.

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Files Modified

File	Change
schema.json	Add google_calendar_id field
contentTypes.d.ts	Update type definitions
GoogleCalendar.jsx	New component
getSIGs.js	New helper functions
page.js	Blog page integration

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