Add task-specific and contest-level user statistics pages for teachers

messages/en.json

@@ -681,5 +681,63 @@
   "contest_results_no_results_description": "No participants have submitted solutions yet.",
   "contest_results_solved_partial": "{solved} solved · {partial} partial",
   "contest_results_score_submissions": "Score / Submissions",
-  "contest_results_error_generic": "Failed to load contest results"
+  "contest_results_error_generic": "Failed to load contest results",
+  "admin_contest_tasks_view_user_stats": "View User Stats",
+  "task_user_stats_title": "Task User Statistics",
+  "task_user_stats_subtitle": "User performance statistics for Task #{taskId} in Contest #{contestId}",
+  "task_user_stats_loading": "Loading user statistics...",
+  "task_user_stats_load_error": "Failed to load user statistics",
+  "task_user_stats_total_users": "Total Users",
+  "task_user_stats_average_score": "Average Score",
+  "task_user_stats_perfect_scores": "Perfect Scores",
+  "task_user_stats_total_submissions": "Total Submissions",
+  "task_user_stats_all_users": "All User Statistics",
+  "task_user_stats_participants": "{count} participants",
+  "task_user_stats_rank": "Rank",
+  "task_user_stats_name": "Name",
+  "task_user_stats_username": "Username",
+  "task_user_stats_best_score": "Best Score",
+  "task_user_stats_submissions": "Submissions",
+  "task_user_stats_previous": "Previous",
+  "task_user_stats_next": "Next",
+  "task_user_stats_page_info": "Page {current} of {total}",
+  "task_user_stats_showing": "Showing {start} - {end} of {total}",
+  "task_user_stats_no_data_title": "No statistics available",
+  "task_user_stats_no_data_description": "No users have attempted this task yet.",
+  "contest_user_stats_title": "Contest User Statistics",
+  "contest_user_stats_subtitle": "Overall user performance statistics for Contest #{contestId}",
+  "contest_user_stats_loading": "Loading contest statistics...",
+  "contest_user_stats_load_error": "Failed to load contest statistics",
+  "contest_user_stats_total_users": "Total Users",
+  "contest_user_stats_average_score": "Average Score",
+  "contest_user_stats_total_solved": "Total Tasks Solved",
+  "contest_user_stats_total_attempted": "Total Tasks Attempted",
+  "contest_user_stats_all_users": "All User Statistics",
+  "contest_user_stats_participants": "{count} participants",
+  "contest_user_stats_rank": "Rank",
+  "contest_user_stats_name": "Name",
+  "contest_user_stats_username": "Username",
+  "contest_user_stats_total_score": "Total Score",
+  "contest_user_stats_solved": "Solved",
+  "contest_user_stats_partial": "Partial",
+  "contest_user_stats_attempted": "Attempted",
+  "contest_user_stats_previous": "Previous",
+  "contest_user_stats_next": "Next",
+  "contest_user_stats_page_info": "Page {current} of {total}",
+  "contest_user_stats_showing": "Showing {start} - {end} of {total}",
+  "contest_user_stats_no_data_title": "No statistics available",
+  "contest_user_stats_no_data_description": "No users have participated in this contest yet.",
+  "admin_contest_view_all_user_stats": "View Contest Stats",
+  "admin_contests_card_view_user_stats": "View User Stats",
+  "contest_user_stats_task_breakdown": "Task Breakdown",
+  "contest_user_stats_task_title": "Task",
+  "contest_user_stats_task_score": "Score",
+  "contest_user_stats_task_attempts": "Attempts",
+  "contest_user_stats_task_status": "Status",
+  "contest_user_stats_task_solved": "Solved",
+  "contest_user_stats_task_partial": "Partial",
+  "contest_user_stats_task_failed": "Failed",
+  "contest_user_stats_task_not_attempted": "Not Attempted",
+  "contest_user_stats_expand_details": "Click to expand task breakdown",
+  "contest_user_stats_collapse_details": "Click to collapse task breakdown"
 }

messages/pl.json

@@ -681,5 +681,63 @@
   "contest_results_no_results_description": "Żaden uczestnik nie przesłał jeszcze rozwiązań.",
   "contest_results_solved_partial": "{solved} rozwiązane · {partial} częściowo",
   "contest_results_score_submissions": "Wynik / Zgłoszenia",
-  "contest_results_error_generic": "Nie udało się załadować wyników konkursu"
+  "contest_results_error_generic": "Nie udało się załadować wyników konkursu",
+  "admin_contest_tasks_view_user_stats": "Zobacz statystyki użytkowników",
+  "task_user_stats_title": "Statystyki użytkowników zadania",
+  "task_user_stats_subtitle": "Statystyki wydajności użytkowników dla zadania #{taskId} w konkursie #{contestId}",
+  "task_user_stats_loading": "Ładowanie statystyk użytkowników...",
+  "task_user_stats_load_error": "Nie udało się załadować statystyk użytkowników",
+  "task_user_stats_total_users": "Liczba użytkowników",
+  "task_user_stats_average_score": "Średni wynik",
+  "task_user_stats_perfect_scores": "Idealne wyniki",
+  "task_user_stats_total_submissions": "Wszystkie zgłoszenia",
+  "task_user_stats_all_users": "Wszystkie statystyki użytkowników",
+  "task_user_stats_participants": "{count} uczestników",
+  "task_user_stats_rank": "Miejsce",
+  "task_user_stats_name": "Imię i nazwisko",
+  "task_user_stats_username": "Nazwa użytkownika",
+  "task_user_stats_best_score": "Najlepszy wynik",
+  "task_user_stats_submissions": "Zgłoszenia",
+  "task_user_stats_previous": "Poprzednia",
+  "task_user_stats_next": "Następna",
+  "task_user_stats_page_info": "Strona {current} z {total}",
+  "task_user_stats_showing": "Pokazywanie {start} - {end} z {total}",
+  "task_user_stats_no_data_title": "Brak dostępnych statystyk",
+  "task_user_stats_no_data_description": "Żaden użytkownik nie podjął jeszcze próby rozwiązania tego zadania.",
+  "contest_user_stats_title": "Statystyki użytkowników konkursu",
+  "contest_user_stats_subtitle": "Ogólne statystyki wydajności użytkowników dla konkursu #{contestId}",
+  "contest_user_stats_loading": "Ładowanie statystyk konkursu...",
+  "contest_user_stats_load_error": "Nie udało się załadować statystyk konkursu",
+  "contest_user_stats_total_users": "Liczba użytkowników",
+  "contest_user_stats_average_score": "Średni wynik",
+  "contest_user_stats_total_solved": "Łącznie rozwiązanych zadań",
+  "contest_user_stats_total_attempted": "Łącznie podjętych prób",
+  "contest_user_stats_all_users": "Wszystkie statystyki użytkowników",
+  "contest_user_stats_participants": "{count} uczestników",
+  "contest_user_stats_rank": "Miejsce",
+  "contest_user_stats_name": "Imię i nazwisko",
+  "contest_user_stats_username": "Nazwa użytkownika",
+  "contest_user_stats_total_score": "Całkowity wynik",
+  "contest_user_stats_solved": "Rozwiązane",
+  "contest_user_stats_partial": "Częściowe",
+  "contest_user_stats_attempted": "Podjęte",
+  "contest_user_stats_previous": "Poprzednia",
+  "contest_user_stats_next": "Następna",
+  "contest_user_stats_page_info": "Strona {current} z {total}",
+  "contest_user_stats_showing": "Pokazywanie {start} - {end} z {total}",
+  "contest_user_stats_no_data_title": "Brak dostępnych statystyk",
+  "contest_user_stats_no_data_description": "Żaden użytkownik nie wziął jeszcze udziału w tym konkursie.",
+  "admin_contest_view_all_user_stats": "Zobacz statystyki konkursu",
+  "admin_contests_card_view_user_stats": "Zobacz statystyki użytkowników",
+  "contest_user_stats_task_breakdown": "Rozbicie na zadania",
+  "contest_user_stats_task_title": "Zadanie",
+  "contest_user_stats_task_score": "Wynik",
+  "contest_user_stats_task_attempts": "Próby",
+  "contest_user_stats_task_status": "Status",
+  "contest_user_stats_task_solved": "Rozwiązane",
+  "contest_user_stats_task_partial": "Częściowe",
+  "contest_user_stats_task_failed": "Nieudane",
+  "contest_user_stats_task_not_attempted": "Nie próbowano",
+  "contest_user_stats_expand_details": "Kliknij, aby rozwinąć rozbicie na zadania",
+  "contest_user_stats_collapse_details": "Kliknij, aby zwinąć rozbicie na zadania"
 }

src/lib/components/dashboard/contests/AdminContestCard.svelte

@@ -171,6 +171,14 @@
         <Users class="mr-2 h-4 w-4" />
         {m.admin_contests_card_view_collaborators()}
       </Button>
+      <Button
+        variant="default"
+        class="w-full transition-all duration-300 hover:-translate-y-0.5 hover:shadow-md"
+        href={localizeHref(`${AppRoutes.TeacherContests}/${contest.id}/user-stats`)}
+      >
+        <Trophy class="mr-2 h-4 w-4" />
+        {m.admin_contests_card_view_user_stats()}
+      </Button>
     </div>
   </Card.Content>
 </Card.Root>

src/lib/components/dashboard/utils.ts

@@ -25,6 +25,16 @@ export function getDashboardTitleTranslationFromPathname(pathname: string): stri
     return m.header_task_details();
   }
 
+  // Check for teacher contest task user stats (e.g., /dashboard/teacher/contests/[contestId]/tasks/[taskId]/user-stats)
+  if (path.match(/^\/dashboard\/teacher\/contests\/\d+\/tasks\/\d+\/user-stats/)) {
+    return m.task_user_stats_title();
+  }
+
+  // Check for teacher contest user stats (e.g., /dashboard/teacher/contests/[contestId]/user-stats)
+  if (path.match(/^\/dashboard\/teacher\/contests\/\d+\/user-stats/)) {
+    return m.contest_user_stats_title();
+  }
+
   // Check for admin contest registration requests (e.g., /dashboard/admin/contests/[contestId]/registration-requests)
   if (path.match(/^\/dashboard\/admin\/contests\/\d+\/registration-requests/)) {
     return m.admin_registration_requests_title();

src/lib/dto/contest.ts

@@ -214,6 +214,13 @@ export interface UserContestStats {
   taskBreakdown: UserTaskPerformance[];
 }
 
+export interface TaskUserStats {
+  user: UserInfo;
+  bestScore: number;
+  submissionCount: number;
+  bestSubmissionId: number;
+}
+
 export interface ContestDetailed {
   id: number;
   name: string;

src/lib/services/ContestsManagementService.ts

@@ -7,7 +7,8 @@ import type {
   AddContestTaskDto,
   ContestTask as ContestTaskRelation,
   ManagedContest,
-  UserContestStats
+  UserContestStats,
+  TaskUserStats
 } from '$lib/dto/contest';
 import type { Task, ContestTask } from '$lib/dto/task';
 import type { Cookies } from '@sveltejs/kit';
@@ -260,6 +261,23 @@ export class ContestsManagementService {
       throw error;
     }
   }
+
+  async getTaskUserStats(contestId: number, taskId: number): Promise<TaskUserStats[]> {
+    try {
+      const url = `/contests-management/contests/${contestId}/tasks/${taskId}/user-stats`;
+
+      const response = await this.apiClient.get<ApiResponse<TaskUserStats[]>>({
+        url
+      });
+      return response.data;
+    } catch (error) {
+      if (error instanceof ApiError) {
+        console.error('Failed to get task user stats:', error.toJSON());
+        throw error;
+      }
+      throw error;
+    }
+  }
 }
 
 export function createContestsManagementService(cookies: Cookies): ContestsManagementService {

src/routes/dashboard/teacher/contests/[contestId]/tasks/+page.svelte

@@ -2,13 +2,15 @@
   import { getContestTasks, removeTaskFromContest } from './tasks.remote';
   import { LoadingSpinner, ErrorCard, EmptyState } from '$lib/components/common';
   import { RemoveTaskFromContestButton } from '$lib/components/dashboard/admin/contests';
+  import { Button } from '$lib/components/ui/button';
   import * as m from '$lib/paraglide/messages';
   import ClipboardList from '@lucide/svelte/icons/clipboard-list';
   import User from '@lucide/svelte/icons/user';
   import Calendar from '@lucide/svelte/icons/calendar';
   import Clock from '@lucide/svelte/icons/clock';
   import CheckCircle from '@lucide/svelte/icons/check-circle';
   import XCircle from '@lucide/svelte/icons/x-circle';
+  import ChartBar from '@lucide/svelte/icons/chart-bar';
   import { formatDate } from '$lib/utils';
 
   interface Props {
@@ -23,6 +25,14 @@
     <h1 class="text-3xl font-bold text-foreground">
       {m.admin_contest_tasks_page_title({ contestId: data.contestId })}
     </h1>
+    <Button
+      href="/dashboard/teacher/contests/{data.contestId}/user-stats"
+      variant="default"
+      class="gap-2"
+    >
+      <ChartBar class="h-4 w-4" />
+      {m.admin_contest_view_all_user_stats()}
+    </Button>
   </div>
 
   <!-- Contest Tasks Section -->
@@ -72,6 +82,15 @@
                       {m.admin_contest_tasks_submission_open_no()}
                     </span>
                   {/if}
+                  <Button
+                    href={`/dashboard/teacher/contests/${data.contestId}/tasks/${contestTask.task.id}/user-stats`}
+                    variant="outline"
+                    size="sm"
+                    class="gap-2"
+                  >
+                    <ChartBar class="h-4 w-4" />
+                    {m.admin_contest_tasks_view_user_stats()}
+                  </Button>
                   <RemoveTaskFromContestButton
                     contestId={data.contestId}
                     taskId={contestTask.task.id}

src/routes/dashboard/teacher/contests/[contestId]/tasks/[taskId]/user-stats/+layout.server.ts

@@ -0,0 +1,21 @@
+import { error } from '@sveltejs/kit';
+
+export const load = async ({
+  params,
+  parent
+}: {
+  params: { contestId: string; taskId: string };
+  parent: () => Promise<{ contestId: number }>;
+}) => {
+  const taskId = parseInt(params.taskId, 10);
+  const parentData = await parent();
+
+  if (isNaN(taskId)) {
+    throw error(400, 'Invalid task ID');
+  }
+
+  return {
+    contestId: parentData.contestId,
+    taskId
+  };
+};