67 lines
2.4 KiB
C#
67 lines
2.4 KiB
C#
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using System;
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using System.Net.Http;
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using System.Net.Http.Json;
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using System.Text.Json.Serialization;
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using System.Threading;
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using System.Threading.Tasks;
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namespace PalladiumWallet.Core.Net;
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/// <summary>A GitHub release newer than the running app.</summary>
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public sealed record LatestRelease(string Tag, string HtmlUrl);
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/// <summary>
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/// Checks the latest GitHub release for the project against the running app version.
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/// Best-effort only: any network/parse failure or an up-to-date app both resolve to null,
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/// so callers never need to distinguish "no update" from "couldn't check".
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/// </summary>
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public static class UpdateChecker
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{
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private const string ReleasesApiUrl = "https://api.github.com/repos/davide3011/PalladiumWallet/releases/latest";
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private sealed class GitHubReleaseResponse
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{
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[JsonPropertyName("tag_name")]
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public string? TagName { get; set; }
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[JsonPropertyName("html_url")]
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public string? HtmlUrl { get; set; }
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}
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public static async Task<LatestRelease?> CheckAsync(string currentVersion, CancellationToken ct = default)
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{
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try
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{
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using var http = new HttpClient { Timeout = TimeSpan.FromSeconds(10) };
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http.DefaultRequestHeaders.UserAgent.ParseAdd("PalladiumWallet");
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using var response = await http.GetAsync(ReleasesApiUrl, ct).ConfigureAwait(false);
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if (!response.IsSuccessStatusCode) return null;
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var release = await response.Content
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.ReadFromJsonAsync<GitHubReleaseResponse>(ct)
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.ConfigureAwait(false);
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if (release?.TagName is not { Length: > 0 } tag) return null;
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if (!TryParse(tag, out var remote) || !TryParse(currentVersion, out var local))
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return null;
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if (remote <= local) return null;
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return new LatestRelease(tag, release.HtmlUrl ?? $"https://github.com/davide3011/PalladiumWallet/releases/tag/{tag}");
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}
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catch
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{
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return null;
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}
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}
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/// <summary>Parses "v1.2.3" / "1.2.3-beta" style tags into a comparable <see cref="Version"/>.</summary>
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private static bool TryParse(string raw, out Version version)
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{
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var s = raw.Trim();
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if (s.StartsWith('v') || s.StartsWith('V')) s = s[1..];
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var dash = s.IndexOf('-');
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if (dash >= 0) s = s[..dash];
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return Version.TryParse(s, out version!);
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}
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}
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