dedupe identical jsdoc tags

.changeset/fuzzy-apes-move.md

@@ -0,0 +1,5 @@
+---
+"@effect/language-service": minor
+---
+
+Dedupe identical JSDoc tags in hover quickinfo

docs/modules/quickinfo.ts.md

@@ -0,0 +1,30 @@
+---
+title: quickinfo.ts
+nav_order: 3
+parent: Modules
+---
+
+## quickinfo overview
+
+Added in v1.0.0
+
+---
+
+<h2 class="text-delta">Table of contents</h2>
+
+- [utils](#utils)
+  - [dedupeJsDocTags](#dedupejsdoctags)
+
+---
+
+# utils
+
+## dedupeJsDocTags
+
+**Signature**
+
+```ts
+export declare function dedupeJsDocTags(quickInfo: ts.QuickInfo): ts.QuickInfo
+```
+
+Added in v1.0.0

docs/modules/refactors.ts.md

@@ -1,6 +1,6 @@
 ---
 title: refactors.ts
-nav_order: 3
+nav_order: 4
 parent: Modules
 ---
 

docs/modules/transformer.ts.md

@@ -1,6 +1,6 @@
 ---
 title: transformer.ts
-nav_order: 4
+nav_order: 5
 parent: Modules
 ---
 

src/index.ts

@@ -5,6 +5,7 @@ import { pipe } from "effect/Function"
 import * as O from "effect/Option"
 import type ts from "typescript"
 import type { PluginOptions } from "./definition.js"
+import { dedupeJsDocTags } from "./quickinfo.js"
 import { refactors } from "./refactors.js"
 import * as AST from "./utils/AST.js"
 
@@ -132,6 +133,16 @@ const init = (
       )
     }
 
+    proxy.getQuickInfoAtPosition = (fileName, position, ...args) => {
+      const quickInfo = languageService.getQuickInfoAtPosition(fileName, position, ...args)
+
+      if (quickInfo) {
+        return dedupeJsDocTags(quickInfo)
+      }
+
+      return quickInfo
+    }
+
     return proxy
   }
 

src/quickinfo.ts

@@ -0,0 +1,28 @@
+/**
+ * @since 1.0.0
+ */
+import * as Eq from "effect/Equivalence"
+import * as A from "effect/ReadonlyArray"
+import type ts from "typescript"
+
+const SymbolDisplayPartEq = Eq.make<ts.SymbolDisplayPart>((fa, fb) =>
+  fa.kind === fb.kind && fa.text === fb.text
+)
+
+const JSDocTagInfoEq = Eq.make<ts.JSDocTagInfo>((fa, fb) =>
+  fa.name === fb.name && typeof fa.text === typeof fb.text &&
+  (typeof fa.text !== "undefined" ? Eq.array(SymbolDisplayPartEq)(fa.text!, fb.text!) : true)
+)
+
+/**
+ * @since 1.0.0
+ */
+export function dedupeJsDocTags(quickInfo: ts.QuickInfo): ts.QuickInfo {
+  if (quickInfo.tags) {
+    return {
+      ...quickInfo,
+      tags: A.dedupeWith(quickInfo.tags, JSDocTagInfoEq)
+    }
+  }
+  return quickInfo
+}