1 files changed, 55 insertions, 0 deletions
diff --git a/src/SMAPI.Web/Framework/Clients/UpdateManifest/UpdateManifestClient.cs b/src/SMAPI.Web/Framework/Clients/UpdateManifest/UpdateManifestClient.cs
new file mode 100644
index 00000000..d7cf4945
--- /dev/null
+++ b/src/SMAPI.Web/Framework/Clients/UpdateManifest/UpdateManifestClient.cs
@@ -0,0 +1,55 @@
+// Copyright 2022 Jamie Taylor
+using System;
+using Pathoschild.Http.Client;
+using StardewModdingAPI.Toolkit.Framework.UpdateData;
+using System.Threading.Tasks;
+using System.Net;
+
+namespace StardewModdingAPI.Web.Framework.Clients.UpdateManifest {
+    /// <summary>An HTTP client for fetching an update manifest from an arbitrary URL.</summary>
+    internal class UpdateManifestClient : IUpdateManifestClient {
+        /*********
+        ** Fields
+        *********/
+        /// <summary>The underlying HTTP client.</summary>
+        private readonly IClient Client;
+
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>The unique key for the mod site.</summary>
+        public ModSiteKey SiteKey => ModSiteKey.UpdateManifest;
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="userAgent">The user agent for the API client.</param>
+        public UpdateManifestClient(string userAgent) {
+            this.Client = new FluentClient()
+                .SetUserAgent(userAgent);
+            this.Client.Formatters.Add(new TextAsJsonMediaTypeFormatter());
+        }
+
+        /// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
+        public void Dispose() {
+            this.Client.Dispose();
+        }
+
+        /// <inheritdoc/>
+        public async Task<IModPage?> GetModData(string id) {
+            UpdateManifestModel? manifest;
+            try {
+                manifest = await this.Client.GetAsync(id).As<UpdateManifestModel?>();
+            } catch (ApiException ex) when (ex.Status == HttpStatusCode.NotFound) {
+                return new GenericModPage(this.SiteKey, id).SetError(RemoteModStatus.DoesNotExist, $"No update manifest found at {id}");
+            }
+            if (manifest is null) {
+                return new GenericModPage(this.SiteKey, id).SetError(RemoteModStatus.DoesNotExist, $"Error parsing manifest at {id}");
+            }
+
+            return new UpdateManifestModPage(id, manifest);
+        }
+    }
+}