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using System.Security.Claims;
using System.Text.Json;
using Elements.Data;
using Elements.Data.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Formats.Png;
using SixLabors.ImageSharp.PixelFormats;
namespace Elements.Backend.Controllers;
[ApiController]
public class SuggestionController : ControllerBase
{
private readonly ApplicationDbContext _dbContext;
public SuggestionController(ApplicationDbContext dbContext)
{
_dbContext = dbContext;
}
[Route("/suggestion/search")]
[HttpGet]
public async Task<IActionResult> GetSuggestions(int firstElementId, int secondElementId)
{
bool firstExists = await _dbContext.Elements.AnyAsync(e => e.Id == firstElementId);
bool secondExists = await _dbContext.Elements.AnyAsync(e => e.Id == secondElementId);
if (!firstExists || !secondExists)
return BadRequest();
IEnumerable<Suggestion> suggestions = await _dbContext.Suggestions
.Where(s =>
(s.FirstElementId == firstElementId && s.SecondElementId == secondElementId) ||
(s.FirstElementId == secondElementId && s.SecondElementId == firstElementId))
.Include(suggestion => suggestion.Votes)
.ToListAsync();
if (!suggestions.Any())
return NotFound();
DateTime votingEnd = suggestions.OrderBy(s => s.VotingEnd).First().VotingEnd;
var suggestionJson = suggestions.Select(s => new
{
s.Id,
s.Name,
Icon = Convert.ToBase64String(s.Icon),
s.FirstElementId,
s.SecondElementId,
Votes = s.Votes.Count,
s.UserId,
s.VotingEnd
}).ToList();
var result = new
{
VotingEnd = votingEnd,
Suggestions = suggestionJson
};
var serializeOptions = new JsonSerializerOptions { PropertyNamingPolicy = JsonNamingPolicy.CamelCase };
return Ok(JsonSerializer.Serialize(result, serializeOptions));
}
public class SuggestionVoteModel
{
public required int Id { get; set; }
}
[Route("/suggestion/vote")]
[Authorize]
[HttpPost]
public async Task<IActionResult> PostVote([FromBody] SuggestionVoteModel vote)
{
Suggestion? suggestion = await _dbContext.Suggestions
.Include(s => s.Votes)
.FirstOrDefaultAsync(s => s.Id == vote.Id);
if (suggestion == null)
return NotFound();
IEnumerable<Claim> claims = User.Claims;
string? currentUserId = claims.FirstOrDefault(claim => claim.Type == "id")?.Value;
if (currentUserId == null)
return StatusCode(StatusCodes.Status500InternalServerError);
//Check if user is voting for own element
if (suggestion.UserId.ToString() == currentUserId)
return BadRequest();
//Check if user already voted for this element
IEnumerable<Vote> suggestionVotes = suggestion.Votes;
if (suggestionVotes.Any(s => s.UserId.ToString() == currentUserId))
return BadRequest();
Vote newVote = new()
{
UserId = int.Parse(currentUserId),
SuggestionId = suggestion.Id
};
await _dbContext.Votes.AddAsync(newVote);
await _dbContext.SaveChangesAsync();
return Ok();
}
public class SuggestionCreateModel
{
public required string Name { get; set; }
public required string IconBitmap { get; set; }
public required int FirstElementId { get; set; }
public required int SecondElementId { get; set; }
}
[Route("/suggestion/create")]
[Authorize]
[HttpPost]
public async Task<IActionResult> PostSuggestion([FromBody] SuggestionCreateModel suggestion)
{
IEnumerable<Claim> claims = User.Claims;
string? currentUserId = claims.FirstOrDefault(claim => claim.Type == "id")?.Value;
if (currentUserId == null)
return StatusCode(StatusCodes.Status500InternalServerError);
//User already suggested something
if (await _dbContext.Suggestions.AnyAsync(s => s.UserId.ToString() == currentUserId))
return BadRequest();
var exists = await _dbContext.Recipes.AnyAsync(r =>
(r.FirstElementId == suggestion.FirstElementId && r.SecondElementId == suggestion.SecondElementId) ||
(r.FirstElementId == suggestion.SecondElementId && r.SecondElementId == suggestion.FirstElementId));
if (exists)
return BadRequest();
Suggestion newSuggestion = new()
{
CreationDate = DateTime.UtcNow,
Name = suggestion.Name,
Icon = ConvertBitmapToPng(Convert.FromBase64String(suggestion.IconBitmap)),
FirstElementId = suggestion.FirstElementId,
SecondElementId = suggestion.SecondElementId,
VotingEnd = DateTime.UtcNow + TimeSpan.FromMinutes(1),
UserId = int.Parse(currentUserId)
};
await _dbContext.Suggestions.AddAsync(newSuggestion);
await _dbContext.SaveChangesAsync();
Vote newVote = new()
{
UserId = int.Parse(currentUserId),
SuggestionId = newSuggestion.Id
};
await _dbContext.Votes.AddAsync(newVote);
await _dbContext.SaveChangesAsync();
return Ok();
}
private static byte[] ConvertBitmapToPng(byte[] bitmapData)
{
Image<Argb32> image = Image.LoadPixelData<Argb32>(bitmapData, 16, 16);
using MemoryStream resultStream = new();
image.Save(resultStream, new PngEncoder());
return resultStream.ToArray();
}
}
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