sam
7759225428
for *some reason*, coravel locks a persistent job queue behind a paywall. this means that if the server ever crashes, all pending jobs are lost. this is... not good, so we're switching to hangfire for that instead. coravel is still used for emails, though. BREAKING CHANGE: Foxnouns.NET now requires Redis to work. the EFCore storage for hangfire doesn't work well enough, unfortunately.
92 lines
3.5 KiB
C#
92 lines
3.5 KiB
C#
// Copyright (C) 2023-present sam/u1f320 (vulpine.solutions)
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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using System.Security.Cryptography;
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using Foxnouns.Backend.Database;
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using Foxnouns.Backend.Jobs;
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using Foxnouns.Backend.Services;
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using Foxnouns.Backend.Utils;
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using SixLabors.ImageSharp;
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using SixLabors.ImageSharp.Formats.Webp;
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using SixLabors.ImageSharp.Processing;
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using SixLabors.ImageSharp.Processing.Processors.Transforms;
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namespace Foxnouns.Backend.Extensions;
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public static class ImageObjectExtensions
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{
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private static readonly string[] ValidContentTypes = ["image/png", "image/webp", "image/jpeg"];
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public static async Task DeleteMemberAvatarAsync(
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this ObjectStorageService objectStorageService,
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Snowflake id,
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string hash,
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CancellationToken ct = default
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) => await objectStorageService.RemoveObjectAsync(MemberAvatarUpdateJob.Path(id, hash), ct);
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public static async Task DeleteUserAvatarAsync(
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this ObjectStorageService objectStorageService,
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Snowflake id,
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string hash,
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CancellationToken ct = default
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) => await objectStorageService.RemoveObjectAsync(UserAvatarUpdateJob.Path(id, hash), ct);
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public static async Task DeleteFlagAsync(
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this ObjectStorageService objectStorageService,
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string hash,
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CancellationToken ct = default
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) => await objectStorageService.RemoveObjectAsync(CreateFlagJob.Path(hash), ct);
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public static async Task<(string Hash, Stream Image)> ConvertBase64UriToImage(
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string uri,
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int size,
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bool crop
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)
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{
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if (!uri.StartsWith("data:image/"))
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throw new ArgumentException("Not a data URI", nameof(uri));
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string[] split = uri.Remove(0, "data:".Length).Split(";base64,");
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string contentType = split[0];
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string encoded = split[1];
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if (!ValidContentTypes.Contains(contentType))
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throw new ArgumentException("Invalid content type for image", nameof(uri));
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if (!AuthUtils.TryFromBase64String(encoded, out byte[]? rawImage))
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throw new ArgumentException("Invalid base64 string", nameof(uri));
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var image = Image.Load(rawImage);
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var processor = new ResizeProcessor(
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new ResizeOptions
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{
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Size = new Size(size),
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Mode = crop ? ResizeMode.Crop : ResizeMode.Max,
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Position = AnchorPositionMode.Center,
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},
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image.Size
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);
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image.Mutate(x => x.ApplyProcessor(processor));
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var stream = new MemoryStream(64 * 1024);
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await image.SaveAsync(stream, new WebpEncoder { Quality = 95, NearLossless = false });
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stream.Seek(0, SeekOrigin.Begin);
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string hash = Convert.ToHexString(await SHA256.HashDataAsync(stream)).ToLower();
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stream.Seek(0, SeekOrigin.Begin);
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return (hash, stream);
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}
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}
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