1 files changed, 73 insertions, 0 deletions
diff --git a/src/SMAPI.Toolkit/Framework/Clients/WebApi/WebApiClient.cs b/src/SMAPI.Toolkit/Framework/Clients/WebApi/WebApiClient.cs
new file mode 100644
index 00000000..7c3df384
--- /dev/null
+++ b/src/SMAPI.Toolkit/Framework/Clients/WebApi/WebApiClient.cs
@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using Newtonsoft.Json;
+using StardewModdingAPI.Toolkit.Serialisation;
+
+namespace StardewModdingAPI.Toolkit.Framework.Clients.WebApi
+{
+    /// <summary>Provides methods for interacting with the SMAPI web API.</summary>
+    public class WebApiClient
+    {
+        /*********
+        ** Fields
+        *********/
+        /// <summary>The base URL for the web API.</summary>
+        private readonly Uri BaseUrl;
+
+        /// <summary>The API version number.</summary>
+        private readonly ISemanticVersion Version;
+
+        /// <summary>The JSON serializer settings to use.</summary>
+        private readonly JsonSerializerSettings JsonSettings = new JsonHelper().JsonSettings;
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="baseUrl">The base URL for the web API.</param>
+        /// <param name="version">The web API version.</param>
+        public WebApiClient(string baseUrl, ISemanticVersion version)
+        {
+            this.BaseUrl = new Uri(baseUrl);
+            this.Version = version;
+        }
+
+        /// <summary>Get metadata about a set of mods from the web API.</summary>
+        /// <param name="mods">The mod keys for which to fetch the latest version.</param>
+        /// <param name="includeExtendedMetadata">Whether to include extended metadata for each mod.</param>
+        public IDictionary<string, ModEntryModel> GetModInfo(ModSearchEntryModel[] mods, bool includeExtendedMetadata = false)
+        {
+            return this.Post<ModSearchModel, ModEntryModel[]>(
+                $"v{this.Version}/mods",
+                new ModSearchModel(mods, includeExtendedMetadata)
+            ).ToDictionary(p => p.ID);
+        }
+
+
+        /*********
+        ** Private methods
+        *********/
+        /// <summary>Fetch the response from the backend API.</summary>
+        /// <typeparam name="TBody">The body content type.</typeparam>
+        /// <typeparam name="TResult">The expected response type.</typeparam>
+        /// <param name="url">The request URL, optionally excluding the base URL.</param>
+        /// <param name="content">The body content to post.</param>
+        private TResult Post<TBody, TResult>(string url, TBody content)
+        {
+            // note: avoid HttpClient for Mac compatibility
+            using (WebClient client = new WebClient())
+            {
+                Uri fullUrl = new Uri(this.BaseUrl, url);
+                string data = JsonConvert.SerializeObject(content);
+
+                client.Headers["Content-Type"] = "application/json";
+                client.Headers["User-Agent"] = $"SMAPI/{this.Version}";
+                string response = client.UploadString(fullUrl, data);
+                return JsonConvert.DeserializeObject<TResult>(response, this.JsonSettings);
+            }
+        }
+    }
+}