fix(backend): enumerate achievement types in some response schema (#15953)

* fix(backend): enumerate achievement types in some response schema

* refactor: use `ref`

3 files changed, 27 insertions, 16 deletions

diff --git a/packages/backend/src/models/json-schema/achievement.ts b/packages/backend/src/models/json-schema/achievement.ts
new file mode 100644
index 0000000000..39a621a570
--- /dev/null
+++ b/packages/backend/src/models/json-schema/achievement.ts
@@ -0,0 +1,25 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { ACHIEVEMENT_TYPES } from '@/models/UserProfile.js';
+
+export const packedAchievementNameSchema = {
+	type: 'string',
+	enum: ACHIEVEMENT_TYPES,
+	optional: false,
+} as const;
+
+export const packedAchievementSchema = {
+	type: 'object',
+	properties: {
+		name: {
+			ref: 'AchievementName',
+		},
+		unlockedAt: {
+			type: 'number',
+			optional: false,
+		},
+	},
+} as const;
diff --git a/packages/backend/src/models/json-schema/notification.ts b/packages/backend/src/models/json-schema/notification.ts
index 7f23d2d6a1..6de120c8d7 100644
--- a/packages/backend/src/models/json-schema/notification.ts
+++ b/packages/backend/src/models/json-schema/notification.ts
@@ -3,7 +3,6 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { ACHIEVEMENT_TYPES } from '@/core/AchievementService.js';
 import { notificationTypes, userExportableEntities } from '@/types.js';
 
 const baseSchema = {
@@ -312,9 +311,7 @@ export const packedNotificationSchema = {
 				enum: ['achievementEarned'],
 			},
 			achievement: {
-				type: 'string',
-				optional: false, nullable: false,
-				enum: ACHIEVEMENT_TYPES,
+				ref: 'AchievementName',
 			},
 		},
 	}, {
diff --git a/packages/backend/src/models/json-schema/user.ts b/packages/backend/src/models/json-schema/user.ts
index e475296702..2b5f706ff9 100644
--- a/packages/backend/src/models/json-schema/user.ts
+++ b/packages/backend/src/models/json-schema/user.ts
@@ -630,18 +630,7 @@ export const packedMeDetailedOnlySchema = {
 			type: 'array',
 			nullable: false, optional: false,
 			items: {
-				type: 'object',
-				nullable: false, optional: false,
-				properties: {
-					name: {
-						type: 'string',
-						nullable: false, optional: false,
-					},
-					unlockedAt: {
-						type: 'number',
-						nullable: false, optional: false,
-					},
-				},
+				ref: 'Achievement',
 			},
 		},
 		loggedInDays: {