refactor(unitFilterService): логика фильтрации связанных ЭК перенесена в класс, который за это отвечает.

PARR.DAL/Repositories/Unit/UnitInUnitRepository.cs

@@ -27,38 +27,14 @@ namespace PARR.DAL.Repositories.Unit
         }
 
 
-        public Task<List<UnitInUnit>> GetByParentIdAsync(Guid parentId)
+        public async Task<List<Guid>> GetRelatedUnitIdsAsync(Guid unitId, CancellationToken ct = default)
         {
-            return dataContext.UnitInUnits
-                .Where(u => u.ParentUnitId == parentId)
-                .ToListAsync();
-        }
-
-
-        public Task<List<UnitInUnit>> GetByChildIdAsync(Guid childId)
-        {
-            return dataContext.UnitInUnits
-                .Where(u => u.ChildUnitId == childId)
-                .ToListAsync();
-        }
-
-
-        public async Task<List<UnitInUnit>> GetParentLinksByChildIdsAsync(IEnumerable<Guid> childUnitIds)
-        {
-            var set = childUnitIds.ToHashSet();
-            return await dataContext.UnitInUnits
+            return await Get()
                 .AsNoTracking()
-                .Where(uinu => set.Contains(uinu.ChildUnitId))
-                .ToListAsync();
-        }
-
-        public async Task<List<UnitInUnit>> GetChildLinksByParentIdsAsync(IEnumerable<Guid> parentUnitIds)
-        {
-            var set = parentUnitIds.ToHashSet();
-            return await dataContext.UnitInUnits
-                .AsNoTracking()
-                .Where(uinu => set.Contains(uinu.ParentUnitId))
-                .ToListAsync();
+                .Where(link => link.ChildUnitId == unitId || link.ParentUnitId == unitId)
+                .Select(link => link.ChildUnitId == unitId ? link.ParentUnitId : link.ChildUnitId)
+                .Distinct()
+                .ToListAsync(ct);
         }
     }
 }