feat: prevent duplicate endpoints from being stored (#45)

* feat: prevent duplicate endpoints from being stored

Bonus: this commit also prevents unusable endpoint from being selected

* fix: catch checkEndpoint errors

* fix: navigation issue

src/pages/Setup.tsx

@@ -16,9 +16,19 @@ const schema = z.object({
 export default () => {
   const navigate = useNavigate()
 
-  const { form } = createForm<z.infer<typeof schema>>({
-    extend: validator({ schema }),
-    async onSubmit({ url, secret }) {
+  const onSetupSuccess = (id: string) => {
+    setSelectedEndpoint(id)
+    navigate('/overview')
+  }
+
+  const checkEndpoint = async ({
+    url,
+    secret,
+  }: {
+    url: string
+    secret: string
+  }) => {
+    try {
       const { ok } = await ky.get(url, {
         headers: secret
           ? {
@@ -27,12 +37,48 @@ export default () => {
           : {},
       })
 
-      if (!ok) return 1
+      return ok
+    } catch {
+      return false
+    }
+  }
+
+  const onEndpointSelect = async (id: string) => {
+    const endpoint = endpointList().find((e) => e.id === id)
+
+    if (!endpoint) {
+      return
+    }
+
+    if (
+      !(await checkEndpoint({ url: endpoint.url, secret: endpoint.secret }))
+    ) {
+      return
+    }
+
+    onSetupSuccess(id)
+  }
+
+  const { form } = createForm<z.infer<typeof schema>>({
+    extend: validator({ schema }),
+    async onSubmit({ url, secret }) {
+      const endpointFromHistory = endpointList().find(
+        (history) => history.url === url && history.secret === secret,
+      )
+
+      if (endpointFromHistory) {
+        onSetupSuccess(endpointFromHistory.id)
+
+        return
+      }
+
+      if (!(await checkEndpoint({ url, secret }))) {
+        return
+      }
 
       const id = uuid()
       setEndpointList([{ id, url, secret }, ...endpointList()])
-      setSelectedEndpoint(id)
-      navigate('/overview')
+      onSetupSuccess(id)
     },
   })
 
@@ -74,10 +120,7 @@ export default () => {
           {({ id, url }) => (
             <div
               class="badge badge-info flex w-full cursor-pointer items-center gap-4 py-4"
-              onClick={() => {
-                setSelectedEndpoint(id)
-                navigate('/overview')
-              }}
+              onClick={() => onEndpointSelect(id)}
             >
               {url}