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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using DevHive.Data.Interfaces;
using DevHive.Data.Models;
using Microsoft.EntityFrameworkCore;
namespace DevHive.Data.Repositories
{
public class RatingRepository : BaseRepository<Rating>, IRatingRepository
{
private readonly DevHiveContext _context;
public RatingRepository(DevHiveContext context)
: base(context)
{
this._context = context;
}
public override async Task<Rating> GetByIdAsync(Guid id)
{
return await this._context.Rating
.Include(x => x.User)
.Include(x => x.Post)
.FirstOrDefaultAsync(x => x.Id == id);
}
/// <summary>
/// Gets all the ratings for a post.
/// </summary>
/// <param name="postId">Id of the post.</param>
/// <returns></returns>
public async Task<List<Rating>> GetRatingsByPostId(Guid postId)
{
return await this._context.Rating
.Include(x => x.User)
.Include(x => x.Post)
.Where(x => x.Post.Id == postId).ToListAsync();
}
/// <summary>
/// Checks if a user rated a given post. In DevHive every user has one or no rating for every post.
/// </summary>
/// <param name="userId">Id of the user.</param>
/// <param name="postId">Id of the post.</param>
/// <returns>True if the user has already rated the post and false if he hasn't.</returns>
public async Task<bool> UserRatedPost(Guid userId, Guid postId)
{
return await this._context.Rating
.Where(x => x.Post.Id == postId)
.AnyAsync(x => x.User.Id == userId);
}
/// <summary>
/// Gets a rating by the post to which the rating corresponds and the user who created it.
/// </summary>
/// <param name="userId">Id of the user.</param>
/// <param name="postId">Id of the post.</param>
/// <returns>Rating for the given post by the given user.</returns>
public async Task<Rating> GetRatingByUserAndPostId(Guid userId, Guid postId)
{
return await this._context.Rating
.Include(x => x.User)
.Include(x => x.Post)
.FirstOrDefaultAsync(x => x.Post.Id == postId && x.User.Id == userId);
}
/// <summary>
/// Checks if a given rating already exist
/// </summary>
/// <param name="id">Id of the rating</param>
/// <returns>True if the rating exists and false if it does not.</returns>
public async Task<bool> DoesRatingExist(Guid id)
{
return await this._context.Rating
.AsNoTracking()
.AnyAsync(r => r.Id == id);
}
}
}
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