Split tables for the stats (#6)

Reviewed-on: #6
Co-authored-by: sandre <perso@sebastienandre.com>
Co-committed-by: sandre <perso@sebastienandre.com>

Back/skydiveLogs-api.DomainBusiness/StatsByYearService.cs

@@ -0,0 +1,68 @@
+using skydiveLogs_api.Domain;
+using skydiveLogs_api.DomainBusiness.Interfaces;
+using skydiveLogs_api.DomainService.Repositories;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace skydiveLogs_api.DomainBusiness
+{
+    public class StatsByYearService : IStatsByYearService
+    {
+        #region Public Constructors
+
+        public StatsByYearService(IJumpService jumpService,
+                                  IIdentityService identityService,
+                                  IStatsByYearRepository statsByYearRepository)
+        {
+            _jumpService = jumpService;
+            _identityService = identityService;
+            _statsByYearRepository = statsByYearRepository;
+        }
+
+        #endregion Public Constructors
+
+        #region Public Methods
+
+        public IEnumerable<StatsByYear> GetStats()
+        {
+            var allStats = _statsByYearRepository.GetAll(_identityService.ConnectedUser);
+            if (!allStats.Any())
+            {
+                var allJumps = _jumpService.GetAllJumps();
+                var results = new List<StatsByYear>();
+
+                if (allJumps.Any())
+                {
+                    results = [.. allJumps.GroupBy(j => j.JumpDate.Year,
+                                                   j => j,
+                                                   (groupby, jumps) => new StatsByYear
+                                                   {
+                                                       Year = groupby.ToString(),
+                                                       Nb = jumps.Count(),
+                                                       User = _identityService.ConnectedUser
+                                                   })];
+                }
+
+                _statsByYearRepository.Add(results);
+                return results;
+            }
+
+            return allStats;
+        }
+
+        public void Reset()
+        {
+            _statsByYearRepository.Delete(_identityService.ConnectedUser);
+        }
+
+        #endregion Public Methods
+
+        #region Private Fields
+
+        private readonly IIdentityService _identityService;
+        private readonly IJumpService _jumpService;
+        private readonly IStatsByYearRepository _statsByYearRepository;
+
+        #endregion Private Fields
+    }
+}