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using HyperBooru.Services;
using ImageMagick;
using Microsoft.AspNetCore.Mvc;
using MimeDetective;
using System.Security.Cryptography;
namespace HyperBooru.Controllers;
[ApiController]
[Route("/media")]
public class MediaController : Controller {
private IConfigService config;
private HBContext db;
private ContentInspector inspector;
public MediaController(IConfigService config, HBContext db) {
this.config = config;
this.db = db;
ContentInspectorBuilder inspectorBuilder = new() {
Definitions =
MimeDetective.Definitions.Default.FileTypes.Images.All()
.Union(MimeDetective.Definitions.Default.FileTypes.Video.All())
.ToList()
};
inspector = inspectorBuilder.Build();
}
[HttpGet("list")]
public IActionResult EnumerateMedia() =>
Ok(db.Media.Select(m => m.ObjectId).ToArray());
[HttpGet("{mediaId}")]
public IActionResult Fetch([FromRoute] Guid mediaId) {
var media = db.Media.First(m => m.Guid == mediaId);
if(media is null)
return NotFound();
var fs = System.IO.File.OpenRead(config.GetPath(media));
return new FileStreamResult(fs, media.MimeType);
}
[HttpGet("thumb/{mediaId}")]
public IActionResult Thumbnail(
[FromRoute] Guid mediaId,
[FromQuery] int? w,
[FromQuery] int? h) {
var media = db.Media.First(m => m.Guid == mediaId);
if(media is null)
return NotFound();
if(media.MimeType.Split("/")[0] != "image")
return BadRequest("Media object not an image");
using var image = new MagickImage(config.GetPath(media));
if(w is null && h is null)
return BadRequest("Both width and height cannot be null!");
if(w > image.Width || h > image.Height)
return BadRequest("Requested thumbnail size is larger than original media");
int width = (int)(w is not null ? w : image.Width * h / image.Height);
int height = (int)(h is not null ? h : image.Height * w / image.Width);
var thumbPath = config.GetPath(media, width, height);
if(!System.IO.File.Exists(thumbPath)) {
image.Resize(new MagickGeometry(width, height));
image.Write(thumbPath);
}
var fs = System.IO.File.OpenRead(thumbPath);
return new FileStreamResult(fs, "image/jpeg");
}
[HttpDelete("{mediaId}")]
public IActionResult Delete([FromRoute] Guid mediaId) {
var media = db.Media.First(m => m.Guid == mediaId);
if(media is null)
return NotFound();
System.IO.File.Delete(config.GetPath(media));
db.Media.Remove(media);
db.SaveChanges();
return Ok();
}
[HttpPost]
public IActionResult Upload(
[FromForm] string? checksum,
[FromForm] DateTime? lastAccessTime,
[FromForm] DateTime? lastWriteTime,
[FromForm] DateTime? createTime) {
using var transaction = db.Database.BeginTransaction();
var formFile = Request.Form.Files[0];
if(formFile.Length < 1)
return BadRequest("Empty file");
var formStream = formFile.OpenReadStream();
// Calculate the checksum using the in-memory file contents
var hash = BitConverter
.ToString(MD5.Create().ComputeHash(formStream))
.Replace("-", "")
.ToLower();
if(checksum is not null && hash != checksum.ToLower())
return BadRequest("Checksum does not match");
var fileRecord = new UploadedFile() {
Filename = formFile.FileName,
OriginalChecksum = hash,
UploadTime = DateTime.UtcNow,
LastAccessTime = lastAccessTime,
LastWriteTime = lastWriteTime,
CreateTime = createTime
};
formStream.Seek(0, SeekOrigin.Begin);
var defs = inspector.Inspect(formStream);
var mime = defs.ByMimeType().FirstOrDefault()?.MimeType;
if(mime is null)
return BadRequest("Unsupported file type");
var media = db.Media
.FirstOrDefault(m => m.Checksum == hash);
if(media is null) {
var ingestTagDef = db.TagDefinitions
.First(td => td.Source == TagSource.Internal && td.Name == "ingest");
media = new() {
Checksum = hash,
MimeType = mime,
UploadedFiles = new() {
fileRecord
},
Tags = new() {
new() { TagDefinition = ingestTagDef }
}
};
using var newFile = System.IO.File.Create(config.GetPath(media));
formStream.Seek(0, SeekOrigin.Begin);
formStream.CopyTo(newFile);
newFile.Flush();
db.Media.Add(media);
} else {
media.UploadedFiles.Add(fileRecord);
db.Update(media);
}
db.SaveChanges();
transaction.Commit();
return Ok(media.Guid);
}
}
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