rewrite to make update-check logic vendor-agnostic (#336)

2 files changed, 104 insertions, 0 deletions

diff --git a/src/StardewModdingAPI.Web/Framework/ModRepositories/IModRepository.cs b/src/StardewModdingAPI.Web/Framework/ModRepositories/IModRepository.cs
new file mode 100644
index 00000000..43bad4e9
--- /dev/null
+++ b/src/StardewModdingAPI.Web/Framework/ModRepositories/IModRepository.cs
@@ -0,0 +1,24 @@
+using System;
+using System.Threading.Tasks;
+using StardewModdingAPI.Web.Models;
+
+namespace StardewModdingAPI.Web.Framework.ModRepositories
+{
+    /// <summary>A repository which provides mod metadata.</summary>
+    internal interface IModRepository : IDisposable
+    {
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>The unique key for this vendor.</summary>
+        string VendorKey { get; }
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Get metadata about a mod in the repository.</summary>
+        /// <param name="id">The mod ID in this repository.</param>
+        Task<ModGenericModel> GetModInfoAsync(string id);
+    }
+}
diff --git a/src/StardewModdingAPI.Web/Framework/ModRepositories/NexusRepository.cs b/src/StardewModdingAPI.Web/Framework/ModRepositories/NexusRepository.cs
new file mode 100644
index 00000000..37f309da
--- /dev/null
+++ b/src/StardewModdingAPI.Web/Framework/ModRepositories/NexusRepository.cs
@@ -0,0 +1,80 @@
+using System;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+using Pathoschild.Http.Client;
+using StardewModdingAPI.Web.Models;
+
+namespace StardewModdingAPI.Web.Framework.ModRepositories
+{
+    /// <summary>An HTTP client for fetching mod metadata from Nexus Mods.</summary>
+    internal class NexusRepository : IModRepository
+    {
+        /*********
+        ** Properties
+        *********/
+        /// <summary>The underlying HTTP client.</summary>
+        private readonly IClient Client;
+
+
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>The unique key for this vendor.</summary>
+        public string VendorKey { get; } = "Nexus";
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        public NexusRepository()
+        {
+            this.Client = new FluentClient("http://www.nexusmods.com/stardewvalley")
+                .SetUserAgent("Nexus Client v0.63.15");
+        }
+
+        /// <summary>Get metadata about a mod in the repository.</summary>
+        /// <param name="id">The mod ID in this repository.</param>
+        public async Task<ModGenericModel> GetModInfoAsync(string id)
+        {
+            try
+            {
+                NexusResponseModel response = await this.Client
+                    .GetAsync($"mods/{id}")
+                    .As<NexusResponseModel>();
+                return new ModGenericModel($"{this.VendorKey}:{id}", response.Name, response.Version, response.Url);
+            }
+            catch (Exception ex)
+            {
+                return new ModGenericModel($"{this.VendorKey}:{id}", ex.ToString());
+            }
+        }
+
+        /// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
+        public void Dispose()
+        {
+            this.Client.Dispose();
+        }
+
+
+        /*********
+        ** Private models
+        *********/
+        /// <summary>A mod metadata response from Nexus Mods.</summary>
+        private class NexusResponseModel
+        {
+            /*********
+            ** Accessors
+            *********/
+            /// <summary>The mod name.</summary>
+            public string Name { get; set; }
+
+            /// <summary>The mod's semantic version number.</summary>
+            public string Version { get; set; }
+
+            /// <summary>The mod's web URL.</summary>
+            [JsonProperty("mod_page_uri")]
+            public string Url { get; set; }
+        }
+    }
+}