feat: add guards and subscription ui

apps/web/components/billing-plans.tsx

@@ -0,0 +1,72 @@
+import { useMemo, useState } from "react";
+import { classNames } from "@documenso/lib";
+import { STRIPE_PLANS, fetchCheckoutSession, useSubscription } from "@documenso/lib/stripe";
+import { Button } from "@documenso/ui";
+import { Switch } from "@headlessui/react";
+
+export const BillingPlans = () => {
+  const { subscription, hasSubscription, isLoading } = useSubscription();
+  const [isAnnual, setIsAnnual] = useState(true);
+
+  return (
+    <div>
+      {!subscription &&
+        STRIPE_PLANS.map((plan) => (
+          <div key={plan.name} className="rounded-lg border py-4 px-6">
+            <h3 className="text-center text-lg font-medium leading-6 text-gray-900">{plan.name}</h3>
+
+            <div className="my-4 flex justify-center">
+              <Switch.Group as="div" className="flex items-center">
+                <Switch
+                  checked={isAnnual}
+                  onChange={setIsAnnual}
+                  className={classNames(
+                    isAnnual ? "bg-neon-600" : "bg-gray-200",
+                    "relative inline-flex h-6 w-11 flex-shrink-0 cursor-pointer rounded-full border-2 border-transparent transition-colors duration-200 ease-in-out focus:outline-none focus:ring-2 focus:ring-neon-600 focus:ring-offset-2"
+                  )}>
+                  <span
+                    aria-hidden="true"
+                    className={classNames(
+                      isAnnual ? "translate-x-5" : "translate-x-0",
+                      "pointer-events-none inline-block h-5 w-5 transform rounded-full bg-white shadow ring-0 transition duration-200 ease-in-out"
+                    )}
+                  />
+                </Switch>
+                <Switch.Label as="span" className="ml-3 text-sm">
+                  <span className="font-medium text-gray-900">Annual billing</span>{" "}
+                  <span className="text-gray-500">(Save $60)</span>
+                </Switch.Label>
+              </Switch.Group>
+            </div>
+
+            <p className="mt-2 text-center text-gray-500">
+              ${(isAnnual ? plan.prices.yearly.price : plan.prices.monthly.price).toFixed(2)}{" "}
+              <span className="text-sm text-gray-400">{isAnnual ? "/yr" : "/mo"}</span>
+            </p>
+
+            <p className="mt-4 text-center text-sm text-gray-500">
+              Lorem ipsum dolor sit amet consectetur, adipisicing elit. Corrupti voluptates delectus
+              doloremque hic vel!
+            </p>
+
+            <div className="mt-4">
+              <Button
+                className="w-full"
+                disabled={isLoading}
+                onClick={() =>
+                  fetchCheckoutSession({
+                    priceId: isAnnual ? plan.prices.yearly.priceId : plan.prices.monthly.priceId,
+                  }).then((res) => {
+                    if (res.success) {
+                      window.location.href = res.url;
+                    }
+                  })
+                }>
+                Subscribe
+              </Button>
+            </div>
+          </div>
+        ))}
+    </div>
+  );
+};