Add Branching, DTO, Repository and AutoMapper

02_ProjectOrientedSessions/Session04/Session04.md

@@ -2,10 +2,150 @@
 (optional): read this to get a better understanding of the topic:
 https://chatgpt.com/share/67f18460-1c1c-8010-bc57-9f3b683ec87a
 
-# DTO (Ali)
+# Branching
+
+- [ ]  Create the feature/transportation-search branch based on develop
+
+<br>
+
+# DTO
+In order to develop transportation search flow, three DTOs need to be created in the application layer.
+<br>
+- [ ]  Create DTOs related to transportation search flow
+<br>
+
+📂 Suggested Folder: Application/DTOs/City`
+<br>
+
+```cs
+public class CityDto
+{
+    public int Id { get; init; }
+    public required string Title { get; init; }
+}
+```
+<br>
+📂 Suggested Folder: Application/DTOs/Transportation
+
+<br>
+
+```cs
+public class TransportationSearchRequestDto
+{
+    public int? FromCityId { get; init; }
+    public int? ToCityId { get; init; }
+    public DateTime? StartDate { get; init; }
+    public DateTime? EndDate { get; init; }
+}
+```
+<br>
+
+```cs
+public class TransportationSearchResultDto
+{
+    public long Id { get; init; }
+    public required string CompanyTitle { get; init; }   
+    public required string FromLocationTitle { get; init; }
+    public required string ToLocationTitle { get; init; }
+    public required string FromCityTitle { get; init; }
+    public required string ToCityTitle { get; init; }
+    public DateTime StartDateTime { get; init; }
+    public DateTime? EndDateTime { get; init; }
+    public decimal Price { get; init; } 
+}
+```
+<br><br>
+
+# Repository
+There are a few things to be add to some repositories for transportation search flow.
+<br>
+
+- [ ] Create DTOs related to transportation search flow
+
+<br>
+
+📂 Suggested Folder: Domain/Framework/Interfaces/Repositories/
+TransportationRepositories
+
+```cs
+public interface ITransportationRepository : IRepository<Transportation, long>
+{
+    Task<IEnumerable<Transportation>> SearchTransportationsAsync(
+        int? fromCityId,
+        int? toCityId, 
+        DateTime? startDate, 
+        DateTime? endDate);
+}
+```
+<br>
+
+📂 Suggested Folder: Infrastructure/Services/Services/TransportationRepositories
+```cs
+public async Task<IEnumerable<Transportation>> SearchTransportationsAsync(
+            int? fromCityId, int? toCityId,
+            DateTime? startDate, DateTime? endDate)
+{
+    var query = DbContext.Transportations
+                .Include(x => x.FromLocation).ThenInclude(x => x.City)
+                .Include(x => x.ToLocation).ThenInclude(x => x.City)
+                .Include(x => x.Company)
+                .AsQueryable();
+                
+    query = query.Where
+    (x => fromCityId == null || x.FromLocation.CityId == fromCityId.Value);
+    
+    query = query.Where
+    (x => toCityId == null || x.ToLocation.CityId == toCityId.Value);
+    
+    query = query.Where
+    (x => startDate == null || x.StartDateTime.Date == startDate.Value.Date);
+    
+    query = query.Where
+    (x => endDate == null ||
+    (x.EndDateTime.HasValue && x.EndDateTime.Value == endDate.Value.Date));
+            
+    return await query.ToListAsync();
+}
+```
+<br><br>
+
+# Auto Mapper
+Auto Mapper simplifies mapping between aggregates and DTOs in both directions.
+<br>
+
+- [ ] Config AutoMapper
+
+<br>
+
+📂 Suggested Folder: Application/Mappers/Profiles
+
+```cs
+public class MappingProfile : Profile
+{
+    public MappingProfile()
+    {
+        CreateMap<Transportation, TransportationSearchResultDto>()
+            .ForMember(dest => dest.CompanyTitle, 
+            opt => opt.MapFrom(src => src.Company.Title))
+            
+            .ForMember(dest => dest.FromLocationTitle, 
+            opt => opt.MapFrom(src => src.FromLocation.Title))
+            
+            .ForMember(dest => dest.ToLocationTitle, 
+            opt => opt.MapFrom(src => src.ToLocation.Title))
+            
+            .ForMember(dest => dest.FromCityTitle, 
+            opt => opt.MapFrom(src => src.FromLocation.City.Title))
+            
+             .ForMember(dest => dest.ToCityTitle, 
+             opt => opt.MapFrom(src => src.ToLocation.City.Title));
+
+        CreateMap<City, CityDto>();
+        }
+    }
+```
+<br>
 
-# Repository Code (Ali)
-# AutoMapper (Ali)
 # Result & Result Status (Amin)
 
 # IService & Service (Amin)