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using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using Microsoft.Net.Http.Headers;
using System;
using System.Linq;
using System.Threading.Tasks;
using Timeline.Auth;
using Timeline.Filters;
using Timeline.Helpers;
using Timeline.Models.Http;
using Timeline.Models.Validation;
using Timeline.Services;
using static Timeline.Resources.Controllers.UserAvatarController;
namespace Timeline.Controllers
{
[ApiController]
public class UserAvatarController : Controller
{
private readonly ILogger<UserAvatarController> _logger;
private readonly IUserAvatarService _service;
public UserAvatarController(ILogger<UserAvatarController> logger, IUserAvatarService service)
{
_logger = logger;
_service = service;
}
[HttpGet("users/{username}/avatar")]
[ResponseCache(NoStore = false, Location = ResponseCacheLocation.None, Duration = 0)]
public async Task<IActionResult> Get([FromRoute][Username] string username)
{
const string IfNonMatchHeaderKey = "If-None-Match";
try
{
var eTagValue = $"\"{await _service.GetAvatarETag(username)}\"";
var eTag = new EntityTagHeaderValue(eTagValue);
if (Request.Headers.TryGetValue(IfNonMatchHeaderKey, out var value))
{
if (!EntityTagHeaderValue.TryParseStrictList(value, out var eTagList))
{
_logger.LogInformation(Log.Format(LogGetBadIfNoneMatch,
("Username", username), ("If-None-Match", value)));
return BadRequest(ErrorResponse.Common.Header.IfNonMatch_BadFormat());
}
if (eTagList.FirstOrDefault(e => e.Equals(eTag)) != null)
{
Response.Headers.Add("ETag", eTagValue);
_logger.LogInformation(Log.Format(LogGetReturnNotModify, ("Username", username)));
return StatusCode(StatusCodes.Status304NotModified);
}
}
var avatarInfo = await _service.GetAvatar(username);
var avatar = avatarInfo.Avatar;
_logger.LogInformation(Log.Format(LogGetReturnData, ("Username", username)));
return File(avatar.Data, avatar.Type, new DateTimeOffset(avatarInfo.LastModified), eTag);
}
catch (UserNotExistException e)
{
_logger.LogInformation(e, Log.Format(LogGetUserNotExist, ("Username", username)));
return NotFound(ErrorResponse.UserCommon.NotExist());
}
}
[HttpPut("users/{username}/avatar")]
[Authorize]
[RequireContentType, RequireContentLength]
[Consumes("image/png", "image/jpeg", "image/gif", "image/webp")]
public async Task<IActionResult> Put([FromRoute][Username] string username)
{
var contentLength = Request.ContentLength!.Value;
if (contentLength > 1000 * 1000 * 10)
return BadRequest(ErrorResponse.Common.Content.TooBig("10MB"));
if (!User.IsAdministrator() && User.Identity.Name != username)
{
_logger.LogInformation(Log.Format(LogPutForbid,
("Operator Username", User.Identity.Name), ("Username To Put Avatar", username)));
return StatusCode(StatusCodes.Status403Forbidden, ErrorResponse.Common.Forbid());
}
try
{
var data = new byte[contentLength];
var bytesRead = await Request.Body.ReadAsync(data);
if (bytesRead != contentLength)
return BadRequest(ErrorResponse.Common.Content.UnmatchedLength_Smaller());
var extraByte = new byte[1];
if (await Request.Body.ReadAsync(extraByte) != 0)
return BadRequest(ErrorResponse.Common.Content.UnmatchedLength_Bigger());
await _service.SetAvatar(username, new Avatar
{
Data = data,
Type = Request.ContentType
});
_logger.LogInformation(Log.Format(LogPutSuccess,
("Username", username), ("Mime Type", Request.ContentType)));
return Ok();
}
catch (UserNotExistException e)
{
_logger.LogInformation(e, Log.Format(LogPutUserNotExist, ("Username", username)));
return BadRequest(ErrorResponse.UserCommon.NotExist());
}
catch (AvatarFormatException e)
{
_logger.LogInformation(e, Log.Format(LogPutUserBadFormat, ("Username", username)));
return BadRequest(e.Error switch
{
AvatarFormatException.ErrorReason.CantDecode => ErrorResponse.UserAvatar.BadFormat_CantDecode(),
AvatarFormatException.ErrorReason.UnmatchedFormat => ErrorResponse.UserAvatar.BadFormat_UnmatchedFormat(),
AvatarFormatException.ErrorReason.BadSize => ErrorResponse.UserAvatar.BadFormat_BadSize(),
_ =>
throw new Exception(ExceptionUnknownAvatarFormatError)
});
}
}
[HttpDelete("users/{username}/avatar")]
[Authorize]
public async Task<IActionResult> Delete([FromRoute][Username] string username)
{
if (!User.IsAdministrator() && User.Identity.Name != username)
{
_logger.LogInformation(Log.Format(LogDeleteForbid,
("Operator Username", User.Identity.Name), ("Username To Delete Avatar", username)));
return StatusCode(StatusCodes.Status403Forbidden, ErrorResponse.Common.Forbid());
}
try
{
await _service.SetAvatar(username, null);
return Ok();
}
catch (UserNotExistException e)
{
_logger.LogInformation(e, Log.Format(LogDeleteNotExist, ("Username", username)));
return BadRequest(ErrorResponse.UserCommon.NotExist());
}
}
}
}
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