fix(fe): fix contestdenied message (#2155)

* fix(fe): fix contestdenied message

* fix(fe): fix contestdenied message delete message

* fix(fe): fix contestdenied message ifelse

apps/frontend/app/(main)/contest/[contestId]/@tabs/problem/page.tsx

@@ -1,6 +1,9 @@
 import DataTable from '@/components/DataTable'
 import { fetcherWithAuth } from '@/lib/utils'
+import { getStatusWithStartEnd } from '@/lib/utils'
+import { dateFormatter } from '@/lib/utils'
 import type { ContestProblem } from '@/types/type'
+import type { Contest } from '@/types/type'
 import { columns } from './_components/Columns'
 
 interface ContestProblemProps {
@@ -21,17 +24,42 @@ export default async function ContestProblem({ params }: ContestProblemProps) {
   })
 
   if (!res.ok) {
-    const { statusCode, message }: { statusCode: number; message: string } =
-      await res.json()
+    const { statusCode }: { statusCode: number } = await res.json()
+
+    const contest: Contest = await fetcherWithAuth
+      .get(`contest/${contestId}`)
+      .then((res) => res.json())
+
+    const formattedStartTime = dateFormatter(
+      contest.startTime,
+      'YYYY-MM-DD HH:mm:ss'
+    )
+    const formattedEndTime = dateFormatter(
+      contest.endTime,
+      'YYYY-MM-DD HH:mm:ss'
+    )
+    const contestStatus = getStatusWithStartEnd(
+      formattedStartTime,
+      formattedEndTime
+    )
+
+    let displayMessage = ''
+
+    if (statusCode === 401) {
+      displayMessage = 'Log in first to check the problems.'
+    } else {
+      if (contestStatus === 'ongoing') {
+        displayMessage = 'Please register first to view the problem list'
+      } else {
+        displayMessage = 'You can access after the contest started'
+      }
+    }
+
     return (
       <div className="flex h-44 translate-y-[22px] items-center justify-center gap-4">
         <div className="flex flex-col items-center gap-1 font-mono">
           <p className="text-xl font-semibold">Access Denied</p>
-          <p className="text-gray-500">
-            {statusCode === 401
-              ? 'Log in first to check the problems.'
-              : message}
-          </p>
+          <p className="text-gray-500">{displayMessage}</p>
         </div>
       </div>
     )