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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AutoMapper;
using DevHive.Data.Interfaces.Repositories;
using DevHive.Data.Models;
using DevHive.Services.Interfaces;
using DevHive.Services.Models;
using DevHive.Services.Models.Post.Post;
namespace DevHive.Services.Services
{
public class FeedService : IFeedService
{
private readonly IMapper _mapper;
private readonly IFeedRepository _feedRepository;
private readonly IUserRepository _userRepository;
public FeedService(IFeedRepository feedRepository, IUserRepository userRepository, IMapper mapper)
{
this._feedRepository = feedRepository;
this._userRepository = userRepository;
this._mapper = mapper;
}
public async Task<ReadPageServiceModel> GetPage(GetPageServiceModel model)
{
User user = await this._userRepository.GetByIdAsync(model.UserId) ??
throw new ArgumentException("User doesn't exist!");
List<User> friendsList = user.Friends.ToList();
// if(friendsList.Count == 0)
// throw new ArgumentException("This user does not have any friends!");
List<Post> posts = await this._feedRepository
.GetFriendsPosts(friendsList, model.FirstRequestIssued, model.PageNumber, model.PageSize) ??
throw new ArgumentException("No posts to query.");
ReadPageServiceModel readPageServiceModel = new();
foreach (Post post in posts)
readPageServiceModel.Posts.Add(this._mapper.Map<ReadPostServiceModel>(post));
return readPageServiceModel;
}
}
}
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