From 84e116d070264a7b7fc1738226a0e8abb7bf86d5 Mon Sep 17 00:00:00 2001
From: camchenry <1514176+camchenry@users.noreply.github.com>
Date: Tue, 11 Nov 2025 21:40:16 +0000
Subject: [PATCH] feat: add options schema for `no-duplicate-type-constituents`
 (#397)

---
 .../no_duplicate_type_constituents.go         | 13 +------
 .../no_duplicate_type_constituents_test.go    |  4 +--
 .../no_duplicate_type_constituents/options.go | 34 +++++++++++++++++++
 .../schema.json                               | 18 ++++++++++
 4 files changed, 55 insertions(+), 14 deletions(-)
 create mode 100644 internal/rules/no_duplicate_type_constituents/options.go
 create mode 100644 internal/rules/no_duplicate_type_constituents/schema.json

diff --git a/internal/rules/no_duplicate_type_constituents/no_duplicate_type_constituents.go b/internal/rules/no_duplicate_type_constituents/no_duplicate_type_constituents.go
index c2e83fb0..3ff3cf2b 100644
--- a/internal/rules/no_duplicate_type_constituents/no_duplicate_type_constituents.go
+++ b/internal/rules/no_duplicate_type_constituents/no_duplicate_type_constituents.go
@@ -37,21 +37,10 @@ const (
 	unionOrIntersection_Intersection
 )
 
-type NoDuplicateTypeConstituentsOptions struct {
-	IgnoreIntersections bool
-	IgnoreUnions        bool
-}
-
 var NoDuplicateTypeConstituentsRule = rule.Rule{
 	Name: "no-duplicate-type-constituents",
 	Run: func(ctx rule.RuleContext, options any) rule.RuleListeners {
-		opts, ok := options.(NoDuplicateTypeConstituentsOptions)
-		if !ok {
-			opts = NoDuplicateTypeConstituentsOptions{
-				IgnoreIntersections: false,
-				IgnoreUnions:        false,
-			}
-		}
+		opts := utils.UnmarshalOptions[NoDuplicateTypeConstituentsOptions](options, "no-duplicate-type-constituents")
 
 		unwindedParentType := func(node *ast.Node, kind ast.Kind) *ast.Node {
 			for {
diff --git a/internal/rules/no_duplicate_type_constituents/no_duplicate_type_constituents_test.go b/internal/rules/no_duplicate_type_constituents/no_duplicate_type_constituents_test.go
index 43f3f81b..bb0ec131 100644
--- a/internal/rules/no_duplicate_type_constituents/no_duplicate_type_constituents_test.go
+++ b/internal/rules/no_duplicate_type_constituents/no_duplicate_type_constituents_test.go
@@ -133,11 +133,11 @@ type T = Record<string, A | B>;
 		},
 		{
 			Code:    "type T = A | A;",
-			Options: NoDuplicateTypeConstituentsOptions{IgnoreUnions: true},
+			Options: rule_tester.OptionsFromJSON[NoDuplicateTypeConstituentsOptions](`{"ignoreUnions": true}`),
 		},
 		{
 			Code:    "type T = A & A;",
-			Options: NoDuplicateTypeConstituentsOptions{IgnoreIntersections: true},
+			Options: rule_tester.OptionsFromJSON[NoDuplicateTypeConstituentsOptions](`{"ignoreIntersections": true}`),
 		},
 		{
 			Code: "type T = Class<string> | Class<string>;",
diff --git a/internal/rules/no_duplicate_type_constituents/options.go b/internal/rules/no_duplicate_type_constituents/options.go
new file mode 100644
index 00000000..8cc44a58
--- /dev/null
+++ b/internal/rules/no_duplicate_type_constituents/options.go
@@ -0,0 +1,34 @@
+// Code generated by github.com/atombender/go-jsonschema, DO NOT EDIT.
+
+package no_duplicate_type_constituents
+
+import "encoding/json"
+
+type NoDuplicateTypeConstituentsOptions struct {
+	// IgnoreIntersections corresponds to the JSON schema field "ignoreIntersections".
+	IgnoreIntersections bool `json:"ignoreIntersections,omitempty"`
+
+	// IgnoreUnions corresponds to the JSON schema field "ignoreUnions".
+	IgnoreUnions bool `json:"ignoreUnions,omitempty"`
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (j *NoDuplicateTypeConstituentsOptions) UnmarshalJSON(value []byte) error {
+	var raw map[string]interface{}
+	if err := json.Unmarshal(value, &raw); err != nil {
+		return err
+	}
+	type Plain NoDuplicateTypeConstituentsOptions
+	var plain Plain
+	if err := json.Unmarshal(value, &plain); err != nil {
+		return err
+	}
+	if v, ok := raw["ignoreIntersections"]; !ok || v == nil {
+		plain.IgnoreIntersections = false
+	}
+	if v, ok := raw["ignoreUnions"]; !ok || v == nil {
+		plain.IgnoreUnions = false
+	}
+	*j = NoDuplicateTypeConstituentsOptions(plain)
+	return nil
+}
diff --git a/internal/rules/no_duplicate_type_constituents/schema.json b/internal/rules/no_duplicate_type_constituents/schema.json
new file mode 100644
index 00000000..d0f8dfd1
--- /dev/null
+++ b/internal/rules/no_duplicate_type_constituents/schema.json
@@ -0,0 +1,18 @@
+{
+  "$schema": "https://json-schema.org/draft-07/schema#",
+  "definitions": {
+    "no_duplicate_type_constituents_options": {
+      "type": "object",
+      "properties": {
+        "ignoreIntersections": {
+          "type": "boolean",
+          "default": false
+        },
+        "ignoreUnions": {
+          "type": "boolean",
+          "default": false
+        }
+      }
+    }
+  }
+}