add direct link to Stripe Customer Portal

frontend/src/components/hosted/AvatarDropdown.tsx

@@ -10,6 +10,7 @@ import {
 } from "../ui/dropdown-menu";
 import { useStore } from "../../store/store";
 import { capitalize } from "./utils";
+import StripeCustomerPortalLink from "./StripeCustomerPortalLink";
 
 export default function AvatarDropdown() {
   const { user, isLoaded, isSignedIn } = useUser();
@@ -55,12 +56,7 @@ export default function AvatarDropdown() {
                 </a>
               </DropdownMenuItem>
               <DropdownMenuItem asChild={true}>
-                <a
-                  href="https://billing.stripe.com/p/login/dR65nxfkLgvldyg9AA"
-                  target="_blank"
-                >
-                  Cancel subscription
-                </a>
+                <StripeCustomerPortalLink label="Cancel subscription" />
               </DropdownMenuItem>
             </>
           )}

frontend/src/components/hosted/StripeCustomerPortalLink.tsx

@@ -0,0 +1,48 @@
+import toast from "react-hot-toast";
+import { useAuthenticatedFetch } from "./useAuthenticatedFetch";
+import { addEvent } from "../../lib/analytics";
+import { SAAS_BACKEND_URL } from "../../config";
+import { PortalSessionResponse } from "./types";
+import { forwardRef, useState } from "react";
+import Spinner from "../custom-ui/Spinner";
+
+interface Props {
+  label: string;
+}
+
+const StripeCustomerPortalLink = forwardRef<HTMLAnchorElement, Props>(
+  ({ label, ...props }, ref) => {
+    const [isLoading, setIsLoading] = useState(false);
+    const authenticatedFetch = useAuthenticatedFetch();
+
+    const redirectToBillingPortal = async () => {
+      try {
+        setIsLoading(true);
+        const res: PortalSessionResponse = await authenticatedFetch(
+          SAAS_BACKEND_URL + "/payments/create_portal_session",
+          "POST"
+        );
+        window.location.href = res.url;
+      } catch (e) {
+        toast.error(
+          "Error directing you to the billing portal. Please email support and we'll get it fixed right away."
+        );
+        addEvent("StripeBillingPortalError");
+      } finally {
+        setIsLoading(false);
+      }
+    };
+
+    return (
+      <a {...props} ref={ref} onClick={redirectToBillingPortal}>
+        <div className="flex gap-x-2">
+          {label} {isLoading && <Spinner />}
+        </div>
+      </a>
+    );
+  }
+);
+
+StripeCustomerPortalLink.displayName = "StripeCustomerPortalLink";
+
+export default StripeCustomerPortalLink;

frontend/src/components/hosted/types.ts

@@ -6,3 +6,7 @@ export interface UserResponse {
   subscriber_tier: string;
   stripe_customer_id: string;
 }
+
+export interface PortalSessionResponse {
+  url: string;
+}

frontend/src/components/hosted/useAuthenticatedFetch.ts

@@ -2,6 +2,9 @@ import { useAuth } from "@clerk/clerk-react";
 
 type FetchMethod = "GET" | "POST" | "PUT" | "DELETE";
 
+// Assumes that the backend is using JWTs for authentication
+// and assumes JSON responses
+// *If response code is not 200 OK or if there's any other error, throws an error
 export const useAuthenticatedFetch = () => {
   const { getToken } = useAuth();