chore: Adding mainFn helpers

lib/health/checkFns/checkWebUrl.ts

@@ -0,0 +1,31 @@
+import { Effects } from "../../types";
+import { CheckResult } from "./CheckResult";
+import { timeoutPromise } from "./index";
+
+/**
+ * This is a helper function to check if a web url is reachable.
+ * @param url
+ * @param createSuccess
+ * @returns
+ */
+export const checkWebUrl = async (
+  url: string,
+  effects: Effects,
+  {
+    timeout = 1000,
+    successMessage = `Reached ${url}`,
+    errorMessage = `Error while fetching URL: ${url}`,
+  } = {}
+): Promise<CheckResult> => {
+  return Promise.race([effects.fetch(url), timeoutPromise(timeout)])
+    .then((x) => ({
+      status: "passing" as const,
+      message: successMessage,
+    }))
+    .catch((e) => {
+      effects.warn(`Error while fetching URL: ${url}`);
+      effects.error(JSON.stringify(e));
+      effects.error(e.toString());
+      return { status: "failing" as const, message: errorMessage };
+    });
+};