6 files changed, 53 insertions, 5 deletions
diff --git a/packages/backend/src/misc/check-word-mute.ts b/packages/backend/src/misc/check-word-mute.ts
index c50f2b723c..0d1c7ee46e 100644
--- a/packages/backend/src/misc/check-word-mute.ts
+++ b/packages/backend/src/misc/check-word-mute.ts
@@ -56,7 +56,7 @@ export async function checkWordMute(note: NoteLike, me: UserLike | null | undefi
 
 				try {
 					return new RE2(regexp[1], regexp[2]).test(text);
-				} catch (err) {
+				} catch (_) {
 					// This should never happen due to input sanitisation.
 					return false;
 				}
diff --git a/packages/backend/src/misc/get-ip-hash.ts b/packages/backend/src/misc/get-ip-hash.ts
index e132fa8f31..571996973b 100644
--- a/packages/backend/src/misc/get-ip-hash.ts
+++ b/packages/backend/src/misc/get-ip-hash.ts
@@ -12,7 +12,7 @@ export function getIpHash(ip: string): string {
 		// (this means for IPv4 the entire address is used)
 		const prefix = IPCIDR.createAddress(ip).mask(64);
 		return 'ip-' + BigInt('0b' + prefix).toString(36);
-	} catch (e) {
+	} catch (_) {
 		const prefix = IPCIDR.createAddress(ip.replace(/:[0-9]+$/, '')).mask(64);
 		return 'ip-' + BigInt('0b' + prefix).toString(36);
 	}
diff --git a/packages/backend/src/misc/i18n.ts b/packages/backend/src/misc/i18n.ts
index 6cbbdef74c..40067cacf5 100644
--- a/packages/backend/src/misc/i18n.ts
+++ b/packages/backend/src/misc/i18n.ts
@@ -26,7 +26,7 @@ export class I18n<T extends Record<string, any>> {
 				}
 			}
 			return str;
-		} catch (e) {
+		} catch (_) {
 			console.warn(`missing localization '${key}'`);
 			return key;
 		}
diff --git a/packages/backend/src/misc/json-schema.ts b/packages/backend/src/misc/json-schema.ts
index ed7d5bfc3a..cf233defd9 100644
--- a/packages/backend/src/misc/json-schema.ts
+++ b/packages/backend/src/misc/json-schema.ts
@@ -64,6 +64,7 @@ import {
 	packedMetaDetailedOnlySchema,
 	packedMetaDetailedSchema,
 	packedMetaLiteSchema,
+	packedMetaClientOptionsSchema,
 } from '@/models/json-schema/meta.js';
 import { packedUserWebhookSchema } from '@/models/json-schema/user-webhook.js';
 import { packedSystemWebhookSchema } from '@/models/json-schema/system-webhook.js';
@@ -135,6 +136,7 @@ export const refs = {
 	MetaLite: packedMetaLiteSchema,
 	MetaDetailedOnly: packedMetaDetailedOnlySchema,
 	MetaDetailed: packedMetaDetailedSchema,
+	MetaClientOptions: packedMetaClientOptionsSchema,
 	UserWebhook: packedUserWebhookSchema,
 	SystemWebhook: packedSystemWebhookSchema,
 	AbuseReportNotificationRecipient: packedAbuseReportNotificationRecipientSchema,
@@ -262,8 +264,6 @@ type ObjectSchemaTypeDef<p extends Schema> =
 				never :
 			any;
 
-type ObjectSchemaType<p extends Schema> = NullOrUndefined<p, ObjectSchemaTypeDef<p>>;
-
 export type SchemaTypeDef<p extends Schema> =
 	p['type'] extends 'null' ? null :
 	p['type'] extends 'integer' ? number :
diff --git a/packages/backend/src/misc/split-id-and-objects.ts b/packages/backend/src/misc/split-id-and-objects.ts
new file mode 100644
index 0000000000..d23bb93695
--- /dev/null
+++ b/packages/backend/src/misc/split-id-and-objects.ts
@@ -0,0 +1,27 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+/**
+ * idとオブジェクトを分離する
+ * @param input idまたはオブジェクトの配列
+ * @returns idの配列とオブジェクトの配列
+ */
+export function splitIdAndObjects<T extends { id: string }>(input: (T | string)[]): { ids: string[]; objects: T[] } {
+	const ids: string[] = [];
+	const objects : T[] = [];
+
+	for (const item of input) {
+		if (typeof item === 'string') {
+			ids.push(item);
+		} else {
+			objects.push(item);
+		}
+	}
+
+	return {
+		ids,
+		objects,
+	};
+}
diff --git a/packages/backend/src/misc/unique-by-key.ts b/packages/backend/src/misc/unique-by-key.ts
new file mode 100644
index 0000000000..4308e29d21
--- /dev/null
+++ b/packages/backend/src/misc/unique-by-key.ts
@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+/**
+ * itemsの中でkey関数が返す値が重複しないようにした配列を返す
+ * @param items 重複を除去したい配列
+ * @param key 重複判定に使うキーを返す関数
+ * @returns 重複を除去した配列
+ */
+export function uniqueByKey<TItem, TKey = string>(items: Iterable<TItem>, key: (item: TItem) => TKey): TItem[] {
+	const map = new Map<TKey, TItem>();
+	for (const item of items) {
+		const k = key(item);
+		if (!map.has(k)) {
+			map.set(k, item);
+		}
+	}
+	return [...map.values()];
+}