Revert "remove follow action"

This reverts commit defbb41648.

locales/ja-JP.yml

@@ -1709,6 +1709,7 @@ _notification:
     app: "連携アプリからの通知"
 
   _actions:
+    followBack: "フォローバック"
     reply: "返信"
     renote: "Renote"
 

src/client/sw/create-notification.ts

@@ -36,10 +36,20 @@ async function composeNotification<K extends keyof pushNotificationDataMap>(data
 		case 'notification':
 			switch (data.body.type) {
 				case 'follow':
+					// users/showの型定義をswos.apiへ当てはめるのが困難なのでapiFetch.requestを直接使用
+					const account = await getAccountFromId(data.userId);
+					if (!account) return null;
+					const userDetail = apiFetch.request('users/show', { userId: data.body.userId }, account.token);
 					return [t('_notification.youWereFollowed'), {
 						body: getUserName(data.body.user),
 						icon: data.body.user.avatarUrl,
 						data,
+						actions: userDetail.isFollowing ? [] : [
+							{
+								action: 'follow',
+								title: t('_notification._actions.followBack')
+							}
+						],
 					}];
 
 				case 'mention':

src/client/sw/sw.ts

@@ -108,6 +108,9 @@ self.addEventListener('notificationclick', <K extends keyof pushNotificationData
 	switch (data.type) {
 		case 'notification':
 			switch (action) {
+				case 'follow':
+					if ('userId' in data.body) await swos.api('following/create', id, { userId: data.body.userId });
+					break;
 				case 'showUser':
 					if ('user' in data.body) client = await swos.openUser(getAcct(data.body.user), id);
 					break;