feat: multi-region monitor support — region selector in UI, region flag on pings

apps/api/src/routes/internal.ts

@@ -33,9 +33,10 @@ export const internal = new Elysia({ prefix: "/internal", detail: { hide: true }
 
   // Returns monitors that are due for a check.
   // scheduled_at = last_checked_at + interval_s (ideal fire time), so jitter = actual_start - scheduled_at
-  .get("/due", async () => {
+  .get("/due", async ({ query }) => {
+    const region = query.region as string | undefined;
     const monitors = await sql`
-      SELECT m.id, m.url, m.method, m.request_headers, m.request_body, m.timeout_ms, m.interval_s, m.query,
+      SELECT m.id, m.url, m.method, m.request_headers, m.request_body, m.timeout_ms, m.interval_s, m.query, m.regions,
              CASE
                WHEN last.checked_at IS NULL THEN now()
                ELSE last.checked_at + (m.interval_s || ' seconds')::interval
@@ -49,6 +50,11 @@ export const internal = new Elysia({ prefix: "/internal", detail: { hide: true }
       WHERE m.enabled = true
         AND (last.checked_at IS NULL
           OR last.checked_at < now() - (m.interval_s || ' seconds')::interval)
+        AND (
+          array_length(m.regions, 1) IS NULL
+          OR m.regions = '{}'
+          OR ${region ? sql`${region} = ANY(m.regions)` : sql`true`}
+        )
     `;
     return monitors;
   })

apps/api/src/routes/monitors.ts

@@ -12,6 +12,7 @@ const MonitorBody = t.Object({
   timeout_ms:      t.Optional(t.Number({ minimum: 1000, maximum: 60000, default: 30000, description: "Request timeout in ms" })),
   interval_s:      t.Optional(t.Number({ minimum: 1, default: 60, description: "Check interval in seconds" })),
   query:           t.Optional(t.Any({ description: "PingQL query — filter conditions for up/down" })),
+  regions:         t.Optional(t.Array(t.String(), { description: "Regions to run checks from. Empty array = all regions." })),
 });
 
 export const monitors = new Elysia({ prefix: "/monitors" })
@@ -28,8 +29,9 @@ export const monitors = new Elysia({ prefix: "/monitors" })
     const ssrfError = await validateMonitorUrl(body.url);
     if (ssrfError) return error(400, { error: ssrfError });
 
+    const regions = body.regions ?? [];
     const [monitor] = await sql`
-      INSERT INTO monitors (account_id, name, url, method, request_headers, request_body, timeout_ms, interval_s, query)
+      INSERT INTO monitors (account_id, name, url, method, request_headers, request_body, timeout_ms, interval_s, query, regions)
       VALUES (
         ${accountId}, ${body.name}, ${body.url},
         ${(body.method ?? 'GET').toUpperCase()},
@@ -37,7 +39,8 @@ export const monitors = new Elysia({ prefix: "/monitors" })
         ${body.request_body ?? null},
         ${body.timeout_ms ?? 30000},
         ${body.interval_s ?? 60},
-        ${body.query ? sql.json(body.query) : null}
+        ${body.query ? sql.json(body.query) : null},
+        ${sql.array(regions)}
       )
       RETURNING *
     `;
@@ -75,7 +78,8 @@ export const monitors = new Elysia({ prefix: "/monitors" })
         request_body    = COALESCE(${body.request_body ?? null}, request_body),
         timeout_ms      = COALESCE(${body.timeout_ms ?? null}, timeout_ms),
         interval_s      = COALESCE(${body.interval_s ?? null}, interval_s),
-        query           = COALESCE(${body.query ? sql.json(body.query) : null}, query)
+        query           = COALESCE(${body.query ? sql.json(body.query) : null}, query),
+        regions         = COALESCE(${body.regions ? sql.array(body.regions) : null}, regions)
       WHERE id = ${params.id} AND account_id = ${accountId}
       RETURNING *
     `;

apps/api/src/routes/pings.ts

@@ -73,7 +73,7 @@ export const ingest = new Elysia()
     const jitterMs = body.jitter_ms ?? null;
 
     const [ping] = await sql`
-      INSERT INTO pings (monitor_id, scheduled_at, jitter_ms, status_code, latency_ms, up, error, meta)
+      INSERT INTO pings (monitor_id, scheduled_at, jitter_ms, status_code, latency_ms, up, error, meta, region)
       VALUES (
         ${body.monitor_id},
         ${scheduledAt},
@@ -82,7 +82,8 @@ export const ingest = new Elysia()
         ${body.latency_ms ?? null},
         ${body.up},
         ${body.error ?? null},
-        ${Object.keys(meta).length > 0 ? sql.json(meta) : null}
+        ${Object.keys(meta).length > 0 ? sql.json(meta) : null},
+        ${body.region ?? null}
       )
       RETURNING *
     `;
@@ -103,6 +104,7 @@ export const ingest = new Elysia()
       error:            t.Optional(t.Nullable(t.String())),
       cert_expiry_days: t.Optional(t.Nullable(t.Number())),
       meta:             t.Optional(t.Any()),
+      region:           t.Optional(t.Nullable(t.String())),
     }),
     detail: { hide: true },
   })