Add developer API, Prometheus metrics, and community links

lib/prometheus-api.ts

@@ -0,0 +1,38 @@
+import "server-only";
+import { randomBytes, createHash } from "node:crypto";
+import { NextRequest, NextResponse } from "next/server";
+import { admin, required } from "./supabase";
+import { requestOrigin } from "./request-origin";
+import { prometheusAction } from "@/shared/prometheus";
+
+export async function prometheusApi(
+  request: NextRequest,
+  reviewer: string,
+  jsonBody: (request: NextRequest) => Promise<unknown>,
+) {
+  const client = admin();
+  const endpoint = `${requestOrigin(request, process.env.MINEGEO_URL)}/api/metrics`;
+  if (request.method === "GET") {
+    const status = required(
+      await client.rpc("prometheus_status", { p_reviewer: reviewer }),
+    );
+    return NextResponse.json({ ...(status as object), endpoint });
+  }
+  if (request.method === "POST") {
+    const { action } = prometheusAction.parse(await jsonBody(request));
+    const token =
+      action === "rotate"
+        ? `mg_metrics_${randomBytes(32).toString("hex")}`
+        : null;
+    const status = required(
+      await client.rpc("configure_prometheus", {
+        p_reviewer: reviewer,
+        p_token_hash: token
+          ? createHash("sha256").update(token).digest("hex")
+          : null,
+      }),
+    );
+    return NextResponse.json({ ...(status as object), endpoint, token });
+  }
+  return NextResponse.json({ error: "Not found" }, { status: 404 });
+}