Initial commit

VersionInfo.cs

@@ -0,0 +1,83 @@
+using System.Xml.Linq;
+
+namespace ChrisKaczor.ApplicationUpdate;
+
+public class VersionInfo
+{
+    public Version? Version { get; set; }
+    public string? InstallFile { get; set; }
+    public DateTimeOffset? InstallCreated { get; set; }
+
+    public static async Task<VersionInfo?> Load(ServerType updateServerType, string server, string file)
+    {
+        return updateServerType switch
+        {
+            ServerType.Generic => LoadFile(server, file),
+            ServerType.GitHub => await LoadGitHub(server),
+            _ => null
+        };
+    }
+
+    private static VersionInfo? LoadFile(string server, string file)
+    {
+        try
+        {
+            var document = XDocument.Load(server + file);
+
+            var versionInformationElement = document.Element("versionInformation");
+
+            if (versionInformationElement == null)
+                return null;
+
+            var versionElement = versionInformationElement.Element("version");
+            var installFileElement = versionInformationElement.Element("installFile");
+            var installCreatedElement = versionInformationElement.Element("installCreated");
+
+            if (versionElement == null || installFileElement == null || installCreatedElement == null)
+                return null;
+
+            var versionInfo = new VersionInfo
+            {
+                Version = Version.Parse(versionElement.Value),
+                InstallFile = installFileElement.Value,
+                InstallCreated = DateTimeOffset.Parse(installCreatedElement.Value)
+            };
+
+            return versionInfo;
+        }
+        catch (Exception)
+        {
+            return null;
+        }
+    }
+
+    private static async Task<VersionInfo?> LoadGitHub(string server)
+    {
+        try
+        {
+            var httpClient = new HttpClient();
+
+            httpClient.DefaultRequestHeaders.UserAgent.ParseAdd(UpdateCheck.ApplicationName);
+
+            var json = await httpClient.GetStringAsync(server);
+
+            var release = GitHubRelease.FromJson(json);
+
+            if (release?.TagName == null || release.Assets == null || release.Assets.Count == 0)
+                return null;
+
+            var versionInfo = new VersionInfo
+            {
+                Version = Version.Parse(release.TagName),
+                InstallFile = release.Assets[0].BrowserDownloadUrl,
+                InstallCreated = release.Assets[0].CreatedAt?.UtcDateTime
+            };
+
+            return versionInfo;
+        }
+        catch (Exception)
+        {
+            return null;
+        }
+    }
+}