enable nullable annotations in the web project & related code (#837)

1 files changed, 11 insertions, 7 deletions

diff --git a/src/SMAPI.Web/Framework/IModPage.cs b/src/SMAPI.Web/Framework/IModPage.cs
index 68220b49..4d0a8d61 100644
--- a/src/SMAPI.Web/Framework/IModPage.cs
+++ b/src/SMAPI.Web/Framework/IModPage.cs
@@ -1,6 +1,5 @@
-#nullable disable
-
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using StardewModdingAPI.Toolkit.Framework.UpdateData;
 
 namespace StardewModdingAPI.Web.Framework
@@ -18,13 +17,13 @@ namespace StardewModdingAPI.Web.Framework
         string Id { get; }
 
         /// <summary>The mod name.</summary>
-        string Name { get; }
+        string? Name { get; }
 
         /// <summary>The mod's semantic version number.</summary>
-        string Version { get; }
+        string? Version { get; }
 
         /// <summary>The mod's web URL.</summary>
-        string Url { get; }
+        string? Url { get; }
 
         /// <summary>The mod downloads.</summary>
         IModDownload[] Downloads { get; }
@@ -33,7 +32,12 @@ namespace StardewModdingAPI.Web.Framework
         RemoteModStatus Status { get; }
 
         /// <summary>A user-friendly error which indicates why fetching the mod info failed (if applicable).</summary>
-        string Error { get; }
+        string? Error { get; }
+
+        /// <summary>Whether the mod data is valid.</summary>
+        [MemberNotNullWhen(true, nameof(IModPage.Name), nameof(IModPage.Url))]
+        [MemberNotNullWhen(false, nameof(IModPage.Error))]
+        bool IsValid { get; }
 
 
         /*********
@@ -44,7 +48,7 @@ namespace StardewModdingAPI.Web.Framework
         /// <param name="version">The mod's semantic version number.</param>
         /// <param name="url">The mod's web URL.</param>
         /// <param name="downloads">The mod downloads.</param>
-        IModPage SetInfo(string name, string version, string url, IEnumerable<IModDownload> downloads);
+        IModPage SetInfo(string name, string? version, string url, IEnumerable<IModDownload> downloads);
 
         /// <summary>Set a mod fetch error.</summary>
         /// <param name="status">The mod availability status on the remote site.</param>