From 78bc6d9714e80dcdf2e7416bb187f5c0059914a1 Mon Sep 17 00:00:00 2001
From: Eric <36512385+PhucNghi176@users.noreply.github.com>
Date: Thu, 17 Oct 2024 02:34:50 +0700
Subject: [PATCH] Add slot generation for semester command and API endpoint

Created/modified `GenerateSlotForSemesterCommandHandler.cs` to handle slot generation for a semester, interacting with `Slot`, `Semester`, and `User` repositories and using a unit of work for saving changes. Added `GenerateSlotForSemester` command to the static `Command` class in `Command.cs`. Updated `SlotApi.cs` with a new endpoint for generating slots for a semester, including a refactored `CreateSlot` method and a new `GenerateSlotForSemester` method.
---
 .../GenerateSlotForSemesterCommandHandler.cs  | 56 +++++++++++++++++++
 .../Services/Slots/Command.cs                 |  4 +-
 .../APIs/Slots/SlotApi.cs                     | 14 +++--
 3 files changed, 68 insertions(+), 6 deletions(-)
 create mode 100644 MBS_COMMAND.Application/UserCases/Commands/Slots/GenerateSlotForSemesterCommandHandler.cs

diff --git a/MBS_COMMAND.Application/UserCases/Commands/Slots/GenerateSlotForSemesterCommandHandler.cs b/MBS_COMMAND.Application/UserCases/Commands/Slots/GenerateSlotForSemesterCommandHandler.cs
new file mode 100644
index 0000000..62e79fc
--- /dev/null
+++ b/MBS_COMMAND.Application/UserCases/Commands/Slots/GenerateSlotForSemesterCommandHandler.cs
@@ -0,0 +1,56 @@
+using MBS_COMMAND.Contract.Abstractions.Messages;
+using MBS_COMMAND.Contract.Abstractions.Shared;
+using MBS_COMMAND.Contract.Services.Slots;
+using MBS_COMMAND.Domain.Abstractions;
+using MBS_COMMAND.Domain.Abstractions.Repositories;
+using MBS_COMMAND.Domain.Entities;
+using static MBS_COMMAND.Contract.Abstractions.Shared.Result;
+
+namespace MBS_COMMAND.Application.UserCases.Commands.Slots;
+
+public class GenerateSlotForSemesterCommandHandler(
+    IRepositoryBase<Slot, Guid> slotRepository,
+    IRepositoryBase<Semester, Guid> semesterRepository,
+    IRepositoryBase<User, Guid> userRepository,
+    IUnitOfWork unitOfWork)
+    : ICommandHandler<Command.GenerateSlotForSemester>
+{
+    public async Task<Result> Handle(Command.GenerateSlotForSemester request, CancellationToken cancellationToken)
+    {
+        var currentSemester = await semesterRepository.FindSingleAsync(x => x.IsActive, cancellationToken);
+        if (currentSemester == null)
+            return Result.Failure(new Error("404", "No active semester found"));
+
+        var mentors = userRepository.FindAll(x => x.Role == 2);
+        var newSlots = new List<Slot>();
+
+        foreach (var mentor in mentors)
+        {
+            var firstWeekSlots = slotRepository.FindAll(x =>
+                x.MentorId == mentor.Id && x.Date >= currentSemester.From &&
+                x.Date <= currentSemester.From.AddDays(6));
+
+            newSlots.AddRange(GenerateNewSlots(firstWeekSlots, 10));
+        }
+
+        slotRepository.AddRange(newSlots);
+        await unitOfWork.SaveChangesAsync(cancellationToken);
+        return Success();
+    }
+
+    private static IEnumerable<Slot> GenerateNewSlots(IEnumerable<Slot> firstWeekSlots, int weeks)
+    {
+        return Enumerable.Range(1, weeks)
+            .SelectMany(i => firstWeekSlots.Select(x => new Slot
+            {
+                Id = Guid.NewGuid(),
+                MentorId = x.MentorId,
+                StartTime = x.StartTime,
+                EndTime = x.EndTime,
+                Date = x.Date.AddDays(7 * i),
+                Note = x.Note,
+                IsOnline = x.IsOnline,
+                Month = (short)x.Date.AddDays(7 * i).Month
+            }));
+    }
+}
\ No newline at end of file
diff --git a/MBS_COMMAND.Contract/Services/Slots/Command.cs b/MBS_COMMAND.Contract/Services/Slots/Command.cs
index aee33d1..5fe37ac 100644
--- a/MBS_COMMAND.Contract/Services/Slots/Command.cs
+++ b/MBS_COMMAND.Contract/Services/Slots/Command.cs
@@ -1,6 +1,8 @@
 using MBS_COMMAND.Contract.Abstractions.Messages;
 namespace MBS_COMMAND.Contract.Services.Slots;
-public class Command
+public static class Command
 {
     public record CreateSlot(Guid MentorId, List<SlotModel> SlotModels) : ICommand;
+
+    public record GenerateSlotForSemester(): ICommand;
 }
diff --git a/MBS_COMMAND.Presentation/APIs/Slots/SlotApi.cs b/MBS_COMMAND.Presentation/APIs/Slots/SlotApi.cs
index f95185e..1b1626a 100644
--- a/MBS_COMMAND.Presentation/APIs/Slots/SlotApi.cs
+++ b/MBS_COMMAND.Presentation/APIs/Slots/SlotApi.cs
@@ -8,13 +8,17 @@ public void AddRoutes(IEndpointRouteBuilder app)
     {
         var gr1 = app.NewVersionedApi("Slots").MapGroup(BaseUrl).HasApiVersion(1);
         gr1.MapPost(string.Empty, CreateSlot).WithSummary("mm/dd/yyyy");
+        gr1.MapGet("generate", GenerateSlotForSemester);
     }
-    public static async Task<IResult> CreateSlot(ISender sender, Command.CreateSlot command)
+
+    private static async Task<IResult> CreateSlot(ISender sender,[FromBody] Command.CreateSlot command)
     {
         var result = await sender.Send(command);
-        if (result.IsFailure)
-            return HandlerFailure(result);
-
-        return Results.Ok(result);
+        return result.IsFailure ? HandlerFailure(result) : Results.Ok(result);
+    }
+    private static async Task<IResult> GenerateSlotForSemester(ISender sender)
+    {
+        var result = await sender.Send(new Command.GenerateSlotForSemester());
+        return result.IsFailure ? HandlerFailure(result) : Results.Ok(result);
     }
 }