Added endpoint for getting contest participants' emails (#1532)

Add old judge endpoint to alpha judge
Closes
SoftUni-Internal/exam-systems-issues#1587

---------

Co-authored-by: evandonova <evelina.andonova@softuni.bg>

Author: evandonova

Servers/UI/OJS.Servers.Ui/Controllers/ContestsController.cs

@@ -9,8 +9,11 @@
 using OJS.Services.Infrastructure.Extensions;
 using OJS.Services.Ui.Business;
 using OJS.Services.Ui.Models.Contests;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
 using System.Threading.Tasks;
 using static Microsoft.AspNetCore.Http.StatusCodes;
+using static OJS.Servers.Infrastructure.ServerConstants.Authorization;
 
 public class ContestsController : BaseApiController
 {
@@ -89,4 +92,17 @@ public async Task<IActionResult> GetParticipatedByUser(
             .GetParticipatedByUserByFiltersAndSorting(username, model?.Map<ContestFiltersServiceModel>())
             .Map<PagedResultResponse<ContestForListingResponseModel>>()
             .ToOkResult();
+
+    /// <summary>
+    /// Gets the emails of all participants in a given contest.
+    /// </summary>
+    /// <param name="contestId">The id of the contest.</param>
+    /// <returns>Results in json format.</returns>
+    [HttpGet]
+    [ProducesResponseType(typeof(IEnumerable<string?>), Status200OK)]
+    [Authorize(ApiKeyPolicyName)]
+    public async Task<IActionResult> GetEmailsOfParticipantsInContest([Required] int contestId)
+        => await this.contestsBusinessService
+            .GetEmailsOfParticipantsInContest(contestId)
+            .ToOkResult();
 }

Services/UI/OJS.Services.Ui.Business/IContestsBusinessService.cs

@@ -39,5 +39,7 @@ Task<PagedResult<ContestForListingServiceModel>> PrepareActivityAndResults(
 
         Task<Dictionary<int, List<ParticipantResultServiceModel>>> GetUserParticipantResultsForContestInPage(
             ICollection<int> contestIds);
+
+        Task<IEnumerable<string?>> GetEmailsOfParticipantsInContest(int contestId);
     }
 }

Services/UI/OJS.Services.Ui.Business/Implementations/ContestsBusinessService.cs

@@ -516,6 +516,12 @@ await pagedContests.Items.ForEachAsync(c =>
             return pagedContests;
         }
 
+        public async Task<IEnumerable<string?>> GetEmailsOfParticipantsInContest(int contestId)
+            => await this.participantsData
+                .GetAllOfficialByContest(contestId)
+                .Select(participant => participant.User.Email!)
+                .ToListAsync();
+
         private static async Task<Dictionary<int, List<ParticipantResultServiceModel>>> MapParticipationResultsToContestsInPage(
             IQueryable<Participant> participants)
             => await participants

Services/UI/OJS.Services.Ui.Data/IParticipantsDataService.cs

@@ -20,6 +20,8 @@ public interface IParticipantsDataService : IDataService<Participant>
 
         IQueryable<Participant> GetAllByContestWithScoresAndProblems(int contestId);
 
+        IQueryable<Participant> GetAllOfficialByContest(int contestId);
+
         Task<bool> ExistsByContestByUserAndIsOfficial(int contestId, string userId, bool isOfficial);
 
         Task<IDictionary<int, int>> GetParticipantsCountInContests(IEnumerable<int> contestIds, bool isOfficial);

Services/UI/OJS.Services.Ui.Data/Implementations/ParticipantsDataService.cs

@@ -47,6 +47,10 @@ public IQueryable<Participant> GetAllByContestWithScoresAndProblems(int contestI
                 .ThenInclude(s => s.Problem)
                 .ThenInclude(p => p.ProblemGroup);
 
+        public IQueryable<Participant> GetAllOfficialByContest(int contestId)
+            => this.GetAllByContest(contestId)
+                .Where(p => p.IsOfficial);
+
         public Task<bool> ExistsByContestByUserAndIsOfficial(int contestId, string userId, bool isOfficial)
             => this.GetAllByContestByUserAndIsOfficial(contestId, userId, isOfficial)
                 .AnyAsync();