Sheffield Masjids

Prayer times, iqamah times, and masjid locations for Sheffield, built with Next.js App Router.

Features

• Daily prayer + iqamah schedule per masjid
• Friday Jummah handling
• Compare view across Sheffield masjids (/compare)
• Last 10 nights Ramadan checklist (/last-ten) - with saved progress and night switcher
• Dedicated masjid pages (/mosques/[slug])
• Monthly timetable browser (/mosques/[slug]/timetable and global /timetable)
• Ramadan-only timetable support (/mosques/[slug]/ramadan-timetable)
• UK DST-aware prayer logic (embedded-DST detection and remapping)
• ICS calendar export for monthly prayer times
• Convex live backend (optional) with static JSON fallback
• Location map for each mosque
• Sun path visualization
• Dynamic backgrounds and floating bottom navigation

Tech Stack

• Frontend: Next.js 16 (App Router), React 19, TypeScript
• Styling: Tailwind CSS v4 + shadcn/ui (Radix primitives)
• Backend: Convex (real-time DB) - optional, falls back to static JSON
• Package Manager: Bun
• Analytics: Vercel Analytics
• Time Libraries: adhan (devDep), moment-hijri, custom DST logic

Requirements

• Node.js >=20.9.0
• Bun

Quick Start

1. Install dependencies:

   bun install
   

2. Run development server:

   bun run dev
   

3. Open http://localhost:3000

Environment Variables

Create .env.local and set:

NEXT_PUBLIC_SITE_URL=https://your-domain.com
CONVEX_URL=<your-convex-url>  # Optional, server only - enables live backend
CONVEX_READ_SECRET=<secret>  # Optional, server only - must match CONVEX_READ_SECRET on the Convex deployment
WEBMCP_ORIGIN_TRIAL_TOKEN=<token>  # Optional - Chrome WebMCP origin trial
OPENAI_APPS_CHALLENGE_TOKEN=<token>  # Optional - OpenAI plugin domain verification

• NEXT_PUBLIC_SITE_URL - Used for canonical URLs, robots.txt, and sitemap.xml. Falls back to http://localhost:3000 if unset.
• CONVEX_URL - Server-only Convex deployment URL. When set, the server reads mosques, monthly prayer times and Ramadan timetables from Convex (pages, /api/prayer-times, /api/mcp, and /api/timetable, which client components use). Browsers never get this URL. Falls back to static JSON in public/data/ if unset or if Convex fails. NEXT_PUBLIC_CONVEX_URL is no longer read by the web app (local scripts still accept it).
• CONVEX_READ_SECRET - Server-only secret sent as readSecret to Convex reads and to the shared API rate limiter (rateLimits:consume). Separate from ADMIN_SECRET, which must never be set in the web runtime.
• WEBMCP_ORIGIN_TRIAL_TOKEN - When set, sends an Origin-Trial header so Chrome can enable WebMCP without a local flag. Register at https://developer.chrome.com/origintrials. Local testing also works with chrome://flags/#enable-webmcp-testing.
• OPENAI_APPS_CHALLENGE_TOKEN - Exact plain-text token from the OpenAI Plugins portal, served at /.well-known/openai-apps-challenge.

Remote MCP (ChatGPT / Codex plugin)

Streamable HTTP MCP endpoint:

https://www.sheffieldmasjids.com/mcp

(/mcp rewrites to /api/mcp.) Tools:

Tool	Purpose
search_mosques	Find mosques by name, city, or country
get_prayer_times	Adhan + iqamah for a mosque on YYYY-MM-DD (default: today Europe/London)

Auth: none (public published times). Rate limit: 60 requests/minute/IP (same best-effort pattern as the HTTP API).

Plugin package for OpenAI directory submission lives in openai-plugin/ (plugin.json, mcp.json, skills/). Zip that folder when uploading to platform.openai.com/plugins.

bun run test:mcp

Agent Prayer Times API

HTTP-only agents can resolve a slug from GET /data/mosques.json, then request:

GET /api/prayer-times?mosque=madina-masjid-sheffield&date=2026-04-10

date is optional and defaults to today in Europe/London. A 200 response has adhan and iqamah objects; iqamah is null on days whose published timetable has adhan times but no iqamah entry (adhan-only months), and is never filled in or calculated. A day with no published adhan row returns 404. The endpoint reads published static timetable files, never Convex, caches successful responses, and applies a best-effort per-instance limit of 60 requests per minute per client IP. Production should also enforce the same rule at the hosting firewall for a globally consistent limit.

Reporting API Problems

External agents can report integration friction without a GitHub account. GET /api/feedback returns the machine-readable contract. Submit with POST /api/feedback (application/json or application/x-www-form-urlencoded, 8 KiB maximum). Clients that cannot POST can use the form at /report-api-issue, which shares the same validation and limits.

{
  "schemaVersion": 1,
  "category": "documentation",
  "summary": "Agent could not discover the supported date format",
  "request": { "method": "GET", "path": "/api/prayer-times", "query": { "mosque": "madina-masjid-sheffield", "date": "10/04/2026" } },
  "response": { "status": 400, "contentType": "application/json", "bodyExcerpt": "Date must be a valid YYYY-MM-DD value." },
  "expected": "Discover the YYYY-MM-DD format before making the request",
  "actual": "The request used an unsupported date format",
  "reproduction": ["Request /api/prayer-times with date=10/04/2026"],
  "agent": { "name": "example-client", "version": "1.0" }
}

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