useSWR in admin signups

src/pages/admin/signups/index.tsx

@@ -1,5 +1,6 @@
-import React, { useEffect, useState } from "react";
+import React from "react";
 import { NextPage } from "next";
+import useSWR from "swr";
 import { formatRelative } from "date-fns";
 import { toast } from "react-toastify";
 import styled from "styled-components";
@@ -8,6 +9,7 @@ import { Button, Link } from "@components/index";
 import AddLink from "@components/AddLink";
 import { SignupForm } from "@models/Signup";
 import SignupApi from "@api/signupApi";
+import { fetcher, APIPath, API } from "@api/backend";
 
 const URL = "/admin/signups";
 
@@ -31,57 +33,62 @@ const confirmDelete = async (signup: SignupForm) => {
   }
 };
 
-const renderData = (signupForms: SignupForm[]) => {
-  if (!signupForms || signupForms.length === 0) {
+const Renderer: React.FC = () => {
+  const api: API = { path: APIPath.SIGNUP_FORMS, authenticated: true };
+  const { data: signupForms, error } = useSWR<SignupForm[]>(api, fetcher);
+
+  if (error) {
+    console.error(error);
+    return (
+      <div>
+        Failed loading events.
+      </div>
+    );
+  }
+
+  if (!signupForms?.length) {
     return <div>No signup forms.</div>;
   }
 
   return (
-    <table>
-      <thead>
-        <tr>
-          <th>Title</th>
-          <th>Start time</th>
-          <th>End time</th>
-          <th>Sign-ups</th>
-          <th>Send email</th>
-        </tr>
-      </thead>
-      <tbody>
-        {signupForms.map((signupForm) => (
-          <tr key={signupForm.id}>
-            <td><Link to={`${URL}/${signupForm.id}`}>{signupForm.title_fi}</Link></td>
-            <td>{formatRelative(new Date(signupForm.start_time), new Date())}</td>
-            <td>{formatRelative(new Date(signupForm.end_time), new Date())}</td>
-            <td><Link to={`${URL}/${signupForm.id}/list`}>View</Link></td>
-            <td><Link to={`${URL}/${signupForm.id}/email`}>Send</Link></td>
-            <td>
-              <StyledButton $colorOverride="red" buttonStyle="filled" onClick={() => confirmDelete(signupForm)}>
-                Delete
-              </StyledButton>
-            </td>
+    <div>
+      <table>
+        <thead>
+          <tr>
+            <th>Title</th>
+            <th>Start time</th>
+            <th>End time</th>
+            <th>Sign-ups</th>
+            <th>Send email</th>
           </tr>
-        ))}
-      </tbody>
-    </table>
+        </thead>
+        <tbody>
+          {signupForms.map((signupForm) => (
+            <tr key={signupForm.id}>
+              <td><Link to={`${URL}/${signupForm.id}`}>{signupForm.title_fi}</Link></td>
+              <td>{formatRelative(new Date(signupForm.start_time), new Date())}</td>
+              <td>{formatRelative(new Date(signupForm.end_time), new Date())}</td>
+              <td><Link to={`${URL}/${signupForm.id}/list`}>View</Link></td>
+              <td><Link to={`${URL}/${signupForm.id}/email`}>Send</Link></td>
+              <td>
+                <StyledButton $colorOverride="red" buttonStyle="filled" onClick={() => confirmDelete(signupForm)}>
+                  Delete
+                </StyledButton>
+              </td>
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
   );
 };
 
-const AdminSignupPage: NextPage = () => {
-  const [forms, setForms] = useState<SignupForm[]>(null);
-
-  useEffect(() => {
-    SignupApi.getForms(true)
-      .then((res) => setForms(res));
-  }, []);
-
-  return (
-    <AdminListCommon>
-      <h1>Sign-up forms</h1>
-      <AddLink text="Create signup form" to={`${URL}/create`} data-e2e="create-signup" />
-      {renderData(forms)}
-    </AdminListCommon>
-  );
-};
+const AdminSignupPage: NextPage = () => (
+  <AdminListCommon>
+    <h1>Sign-up forms</h1>
+    <AddLink text="Create signup form" to={`${URL}/create`} data-e2e="create-signup" />
+    <Renderer />
+  </AdminListCommon>
+);
 
 export default AdminSignupPage;