(GH-70) Validates that the author does not match the maintainer

docs/input/docs/rules/choco3002.md

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+---
+Title: AuthorDoesNotMatchMaintainer
+Order: 20
+Description:
+Category: Notes
+---
+
+:::{.alert .alert-warning}
+**Preliminary Notice**
+This rule is not yet available in chocolatey-vscode.
+It is a planned rule for 0.8.0.
+:::
+
+**NOTE**: This page is a stub that has not yet been filled out. If you have questions about this issue, please ask in the review or reach out on [Gitter](https://gitter.im/chocolatey/chocolatey.org)
+
+## Issue
+
+In the nuspec,
+
+## Recommended Solution
+
+Please update _ so that _
+
+## Reasoning
+
+## See also
+
+- [Package validator rule](https://github.com/chocolatey/package-validator/wiki/AuthorDoesNotMatchMaintainer){target = _blank}

src/Chocolatey.Language.Server/Validations/AuthorDoesNotMatchMaintainer.cs

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+using System.Collections.Generic;
+using System.Linq;
+using System.Text.RegularExpressions;
+using Chocolatey.Language.Server.Models;
+using OmniSharp.Extensions.LanguageServer.Protocol.Models;
+using DiagnosticSeverity = OmniSharp.Extensions.LanguageServer.Protocol.Models.DiagnosticSeverity;
+
+namespace Chocolatey.Language.Server.Validations
+{
+    /// <summary>
+    /// Runs validation of the current nuspec to verify that the author and owner
+    /// do not match.
+    /// </summary>
+    /// <seealso href="https://github.com/chocolatey/package-validator/blob/master/src/chocolatey.package.validator/infrastructure.app/rules/AuthorDoesNotMatchMaintainerNote.cs">Package validator note for author and owner values.</seealso>
+    public sealed class AuthorDoesNotMatchMaintainer : NuspecRuleBase
+    {
+        /// <inheritdoc />
+        /// <summary>
+        /// Gets the string Id for the rule, similar to CHOCO0001
+        /// </summary>
+        public override string Id => "choco3002";
+
+        /// <inheritdoc />
+        /// <summary>
+        /// Gets the type of of validation
+        /// </summary>
+        public override ValidationType ValidationType => ValidationType.Note;
+
+        public override IEnumerable<Diagnostic> Validate(Package package)
+        {
+            var owners = string.Join(",", package.Maintainers).ToLower();
+            var authors = string.Join(",", package.Authors).ToLower();
+            if (package.Maintainers.Count <= 0)
+            {
+                yield break;
+            }
+
+            if (owners.Equals(authors))
+            {
+                yield return CreateDiagnostic(
+                    package.Maintainers.First().TextStart,
+                    package.Maintainers.Last().TextEnd,
+                    "The package maintainer field (owners) matches the software author field (authors) in the nuspec. The reviewer will ensure that the package maintainer is also the software author."
+                );
+                yield return CreateDiagnostic(
+                    package.Authors.First().TextStart,
+                    package.Authors.Last().TextEnd,
+                    "The package maintainer field (owners) matches the software author field (authors) in the nuspec. The reviewer will ensure that the package maintainer is also the software author."
+                );
+            }
+        }
+    }
+}