hydrate alert evidence from clickhouse

services/api/src/alert-context.ts

@@ -0,0 +1,21 @@
+import { z } from "zod";
+
+export const alertContextTraceIdSchema = z
+  .string()
+  .trim()
+  .min(1)
+  .max(256)
+  .regex(/^[A-Za-z0-9][A-Za-z0-9:_./-]*$/);
+
+export const isAlertContextPath = (pathname: string): boolean => {
+  return /^\/flow\/alerts\/[^/]+\/context$/.test(pathname);
+};
+
+export const parseAlertContextTraceIdPath = (pathname: string): string | null => {
+  if (!isAlertContextPath(pathname)) {
+    return null;
+  }
+
+  const encodedTraceId = pathname.slice("/flow/alerts/".length, -"/context".length);
+  return alertContextTraceIdSchema.parse(decodeURIComponent(encodedTraceId));
+};