1 files changed, 54 insertions, 0 deletions
diff --git a/src/DevHive.Services/Services/RatingService.cs b/src/DevHive.Services/Services/RatingService.cs
new file mode 100644
index 0000000..2c5a6b6
--- /dev/null
+++ b/src/DevHive.Services/Services/RatingService.cs
@@ -0,0 +1,54 @@
+using System;
+using System.Diagnostics;
+using System.Threading.Tasks;
+using AutoMapper;
+using DevHive.Data.Interfaces.Repositories;
+using DevHive.Data.Models;
+using DevHive.Services.Models.Post.Rating;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+
+namespace DevHive.Services.Services
+{
+	public class RatingService
+	{
+		private readonly IPostRepository _postRepository;
+		private readonly IRatingRepository _ratingRepository;
+		private readonly IMapper _mapper;
+
+		public RatingService(IPostRepository postRepository, IRatingRepository ratingRepository, IMapper mapper)
+		{
+			this._postRepository = postRepository;
+			this._ratingRepository = ratingRepository;
+			this._mapper = mapper;
+		}
+
+		public async Task<ReadRatingServiceModel> RatePost(RatePostServiceModel ratePostServiceModel)
+		{
+			if (!await this._postRepository.DoesPostExist(ratePostServiceModel.PostId))
+				throw new ArgumentNullException("Post does not exist!");
+
+			if (!await this._ratingRepository.HasUserRatedThisPost(ratePostServiceModel.UserId, ratePostServiceModel.PostId))
+				throw new ArgumentException("You can't rate the same post more then one(duh, amigo)");
+
+			Post post = await this._postRepository.GetByIdAsync(ratePostServiceModel.PostId);
+
+			Rating rating = post.Rating;
+			if (ratePostServiceModel.Liked)
+				rating.Likes++;
+			else
+				rating.Dislikes++;
+
+			bool success = await this._ratingRepository.EditAsync(rating.Id, rating);
+			if (!success)
+				throw new InvalidOperationException("Unable to rate the post!");
+
+			Rating newRating = await this._ratingRepository.GetByIdAsync(rating.Id);
+			return this._mapper.Map<ReadRatingServiceModel>(newRating);
+		}
+
+		public async Task<ReadRatingServiceModel> RemoveUserRateFromPost(Guid userId, Guid postId)
+		{
+			throw new NotImplementedException();
+		}
+	}
+}