feat: Add LintDocsUrl enum for LintDiagnosticDetails

src/context.rs

@@ -2,7 +2,8 @@
 
 use crate::control_flow::ControlFlow;
 use crate::diagnostic::{
-  LintDiagnostic, LintDiagnosticDetails, LintDiagnosticRange, LintFix,
+  LintDiagnostic, LintDiagnosticDetails, LintDiagnosticRange, LintDocsUrl,
+  LintFix,
 };
 use crate::ignore_directives::{
   parse_line_ignore_directives, CodeStatus, FileIgnoreDirective,
@@ -484,7 +485,7 @@ impl<'a> Context<'a> {
       code: code.to_string(),
       hint: maybe_hint,
       fixes,
-      custom_docs_url: None,
+      custom_docs_url: LintDocsUrl::Default,
       info: vec![],
     }
   }

src/diagnostic.rs

@@ -34,6 +34,14 @@ pub struct LintDiagnosticRange {
   pub description: Option<String>,
 }
 
+#[derive(Clone, Default)]
+pub enum LintDocsUrl {
+  #[default]
+  Default,
+  None,
+  Custom(String),
+}
+
 #[derive(Clone)]
 pub struct LintDiagnosticDetails {
   pub message: String,
@@ -48,7 +56,7 @@ pub struct LintDiagnosticDetails {
   pub fixes: Vec<LintFix>,
   /// URL to the lint rule documentation. By default, the url uses the
   /// code to link to lint.deno.land
-  pub custom_docs_url: Option<String>,
+  pub custom_docs_url: LintDocsUrl,
   /// Displays additional information at the end of a diagnostic.
   pub info: Vec<Cow<'static, str>>,
 }
@@ -122,13 +130,13 @@ impl Diagnostic for LintDiagnostic {
   }
 
   fn docs_url(&self) -> Option<Cow<'_, str>> {
-    if let Some(custom_docs_url) = &self.details.custom_docs_url {
-      Some(Cow::Borrowed(custom_docs_url))
-    } else {
-      Some(Cow::Owned(format!(
+    match &self.details.custom_docs_url {
+      LintDocsUrl::Default => Some(Cow::Owned(format!(
         "https://docs.deno.com/lint/rules/{}",
         &self.details.code
-      )))
+      ))),
+      LintDocsUrl::Custom(url) => Some(Cow::Borrowed(url)),
+      LintDocsUrl::None => None,
     }
   }
 }