add github readme badge api

pages/api/badge.ts

@@ -0,0 +1,93 @@
+import { NextRequest } from 'next/server'
+
+export const runtime = 'edge'
+
+type DataResponse = {
+  up: number
+  down: number
+  updatedAt: number
+  monitors: Record<
+    string,
+    {
+      up: boolean
+      latency: number
+      location: string
+      message: string
+    }
+  >
+}
+
+type BadgePayload = {
+  schemaVersion: 1
+  label: string
+  message: string
+  color: string
+  isError?: boolean
+}
+
+const jsonHeaders = {
+  'Content-Type': 'application/json',
+  'Cache-Control': 'no-store, max-age=0, must-revalidate',
+}
+
+function errorBadge(label: string, message: string): BadgePayload {
+  return {
+    schemaVersion: 1,
+    label,
+    message,
+    color: 'lightgrey',
+    isError: true,
+  }
+}
+
+export default async function handler(req: NextRequest): Promise<Response> {
+  try {
+    const url = new URL(req.url)
+
+    const monitorId = url.searchParams.get('id')
+    const label = url.searchParams.get('label') ?? 'UptimeFlare'
+
+    const upMsg = url.searchParams.get('up') ?? 'UP'
+    const downMsg = url.searchParams.get('down') ?? 'DOWN'
+    const colorUp = url.searchParams.get('colorUp') ?? 'brightgreen'
+    const colorDown = url.searchParams.get('colorDown') ?? 'red'
+
+    const dataUrl = new URL('/api/data', url.origin)
+    const resp = await fetch(dataUrl, { cache: 'no-store' })
+
+    if (!resp.ok) {
+      return new Response(JSON.stringify(errorBadge(label, 'unavailable')), {
+        headers: jsonHeaders,
+        status: resp.status,
+      })
+    }
+
+    const payload = (await resp.json()) as DataResponse
+    const monitor = payload.monitors?.[monitorId]
+
+    if (!monitor) {
+      return new Response(JSON.stringify(errorBadge(label, 'unknown')), {
+        headers: jsonHeaders,
+        status: 404,
+      })
+    }
+
+    const isUp = Boolean(monitor.up)
+    const badge: BadgePayload = {
+      schemaVersion: 1,
+      label,
+      message: isUp ? upMsg : downMsg,
+      color: isUp ? colorUp : colorDown,
+    }
+
+    return new Response(JSON.stringify(badge), {
+      headers: jsonHeaders,
+    })
+  } catch (err) {
+    console.error('Error rendering badge API:', err)
+    return new Response(JSON.stringify(errorBadge('status', 'error')), {
+      headers: jsonHeaders,
+      status: 500,
+    })
+  }
+}