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using BantFlags.Data;
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using BantFlags.Data.Database;
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using ImageMagick;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.AspNetCore.Mvc.RazorPages;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.Linq;
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using System.Threading.Tasks;
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namespace BantFlags
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{
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[RequestFormLimits(ValueCountLimit = 5000)]
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[IgnoreAntiforgeryToken(Order = 2000)]
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public class UploadModel : PageModel
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{
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private IWebHostEnvironment Env { get; }
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private DatabaseService Database { get; set; }
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private readonly byte[] pngHeader = new byte[] { 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A };
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private string FlagsPath { get; set; }
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public Staging staging { get; set; }
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public UploadModel(IWebHostEnvironment env, DatabaseService db, Staging s)
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{
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Env = env;
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Database = db;
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staging = s;
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FlagsPath = Env.WebRootPath + "/flags/";
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}
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public string Message { get; private set; }
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// TODO: These bound properties should be inlined.
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[BindProperty]
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public IFormFile Upload { get; set; }
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[BindProperty]
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public bool ShouldGloss { get; set; }
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public async void OnGet()
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{
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if (staging.Flags == null)
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{
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staging.Flags = await Database.GetFlags(); // Because we can't populate Flags in the constructor.
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}
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}
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public IActionResult OnPostUnstage(List<FormFlag> addedAndDeletedFlags, List<RenameFlag> renamedFlags, string password)
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{
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if (password != staging.Password) // TODO: Maybe we should hash this?
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{
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Message = "Wrong Password";
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return Page();
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}
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try // Haha I can't program
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{
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var addedAndDeleted = addedAndDeletedFlags.Where(x => x.IsChecked);
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var renamed = renamedFlags.Where(x => x.IsChecked);
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addedAndDeleted.ForEach(x =>
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_ = x.FormMethod switch
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{
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// Using an enum seems kinda redundant here.
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Method.Delete => staging.DeletedFlags.Remove(staging.DeletedFlags.First(y => y.Name == x.Name)),
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Method.Add => staging.AddedFlags.Remove(staging.AddedFlags.First(y => y.Name == x.Name)),
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_ => throw new Exception()
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});
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renamed.ForEach(x => staging.RenamedFlags.Remove(staging.RenamedFlags.First(y => y.Name == x.Name))); // These can be reworked to use asp-for and then we can work off the original objects.
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addedAndDeleted.ForEach(x => staging.Flags.Add(x.Name));
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renamed.ForEach(x => staging.Flags.Add(x.Name));
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staging.Flags = staging.Flags.Distinct().OrderBy(x => x).ToList();
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Message = $"Successfully unstaged flags";
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}
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catch
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{
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Message = "Something went very wrong";
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}
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return Page();
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}
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public async Task<IActionResult> OnPostCommitAsync(string password)
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{
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if (password != staging.Password)
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{
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Message = "Wrong Password";
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return Page();
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}
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try
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{
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// TODO: This needs to be rewritten / burnt / both
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if (staging.DeletedFlags.Any())
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{
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await Database.DeleteFlagsAsync(staging.DeletedFlags);
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staging.DeletedFlags
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.ForEach(flag => System.IO.File.Copy(Path.Combine(FlagsPath, flag.Name + ".png"), Path.Combine(FlagsPath, "dead/", flag.Name + ".png")));
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}
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if (staging.AddedFlags.Any())
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{
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await Database.InsertFlagsAsync(staging.AddedFlags);
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staging.AddedFlags
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.ForEach(flag => System.IO.File.Copy(Path.Combine(FlagsPath, "staging/", flag.Name + ".png"), Path.Combine(FlagsPath, flag.Name + ".png")));
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}
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if (staging.RenamedFlags.Any())
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{
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await Database.RenameFlagsAsync(staging.RenamedFlags);
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staging.RenamedFlags
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.ForEach(flag => System.IO.File.Copy(Path.Combine(FlagsPath, flag.Name + ".png"), Path.Combine(FlagsPath, flag.NewName + ".png")));
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}
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await Database.UpdateKnownFlags();
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staging.Flags = await Database.GetFlags();
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staging.Clear();
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Message = "Changes Commited successfully";
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}
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catch (Exception e)
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{
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Message = "Something went bang\n" + e.Message;
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}
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return Page();
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}
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public IActionResult OnPostDelete(string flag)
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{
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staging.DeletedFlags.Add(new FormFlag
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{
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Name = flag
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});
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staging.Flags.Remove(flag);
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return Page();
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}
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public IActionResult OnPostRename(string flag, string newName)
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{
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if (!(FileNameIsValid(newName)))
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{
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Message = "Invalid Filename.";
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return Page();
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}
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staging.RenamedFlags.Add(new RenameFlag
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{
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Name = flag,
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NewName = newName
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});
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staging.Flags.Remove(flag);
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return Page();
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}
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public async Task<IActionResult> OnPostAddAsync()
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{
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try
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{
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if (!(await ValidateImageAsync()))
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{
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Message = "Invalid Image.";
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return Page();
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}
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// TODO: maybe there's something no releasing memory here.
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using var memoryStream = new MemoryStream();
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await Upload.CopyToAsync(memoryStream);
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memoryStream.Position = 0;
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// Magic.NET is a huge dependency to be used like this
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// Maybe we should switch to a Process and expect to have
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// ImageMagick installed on the target machine.
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using var image = new MagickImage(memoryStream);
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if (ShouldGloss)
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{
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using var gloss = new MagickImage(Env.WebRootPath + "/gloss.png");
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gloss.Composite(image, new PointD(0, 0), CompositeOperator.Over);
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}
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image.Write(FlagsPath + "staging/" + Upload.FileName);
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staging.AddedFlags.Add(new FormFlag
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{
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Name = Path.GetFileNameWithoutExtension(Upload.FileName)
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});
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Message = "Flag uploaded successfully!";
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return Page();
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}
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catch (Exception e)
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{
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Message = $"Something went bang.\n{e.Message}";
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return Page();
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}
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}
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// TODO: hash images and check against for duplicates.
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// or is that going too far?
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/// <summary>
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/// Rigorously validates an image to ensure it's a flag.
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/// </summary>
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public async Task<bool> ValidateImageAsync()
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{
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var fileName = Path.GetFileNameWithoutExtension(Upload.FileName);
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if (!(FileNameIsValid(fileName))
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|| Upload.Length > 15 * 1024 // 15KB
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|| Upload.ContentType.ToLower() != "image/png")
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{
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return false;
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}
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using (var memoryStream = new MemoryStream())
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{
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await Upload.CopyToAsync(memoryStream);
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memoryStream.Position = 0;
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using (var image = new MagickImage(memoryStream))
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{
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if (image.Width != 16 || image.Height != 11)
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{
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return false;
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}
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}
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using (var reader = new BinaryReader(memoryStream))
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{
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reader.BaseStream.Position = 0;
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return reader.ReadBytes(pngHeader.Length).SequenceEqual(pngHeader);
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}
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}
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}
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/// <summary>
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/// Matches bad things we don't want in filenames.
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/// Inverts the result - returns false on a match.
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/// </summary>
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/// <param name="fileName">The name of the file to validate.</param>
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/// <returns></returns>
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private bool FileNameIsValid(string fileName) =>
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!(fileName == null
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|| fileName.Contains("||")
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|| Database.KnownFlags().Contains(fileName)
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|| staging.AddedFlags.Select(x => x.Name).Contains(fileName)
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|| fileName.Length > 100);
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}
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}
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C-xC-c
4 years ago
