外部サービス連携情報をPersonのfieldsに乗せて配信する (#3499)

* Update person.ts

* Update person.ts

refs: https://github.com/syuilo/misskey/pull/3499#issuecomment-444484557

* Update person.ts

refs: https://github.com/syuilo/misskey/pull/3499#pullrequestreview-181755475

src/remote/activitypub/renderer/person.ts

@@ -13,6 +13,28 @@ export default async (user: ILocalUser) => {
 		DriveFile.findOne({ _id: user.avatarId }),
 		DriveFile.findOne({ _id: user.bannerId })
 	]);
+	
+	const attachment: {
+		type: string,
+		name: string,
+		value: string,
+		verified_at?: string
+	}[] = [];
+	user.twitter && attachment.push({
+		type: 'PropertyValue',
+		name: 'Twitter',
+		value: `<a href="https://twitter.com/intent/user?user_id=${user.twitter.userId}" rel="me nofollow noopener" target="_blank"><span>@${user.twitter.screenName}</span></a>`
+	});
+	user.github && attachment.push({
+		type: 'PropertyValue',
+		name: 'GitHub',
+		value: `<a href="https://github.com/${user.github.login}" rel="me nofollow noopener" target="_blank"><span>@${user.github.login}</span></a>`
+	});
+	user.discord && attachment.push({
+		type: 'PropertyValue',
+		name: 'Discord',
+		value: `<a href="https://discordapp.com/users/${user.discord.id}" rel="me nofollow noopener" target="_blank"><span>@${user.discord.username}#${user.discord.discriminator}</span></a>`
+	});
 
 	return {
 		type: user.isBot ? 'Service' : 'Person',
@@ -31,6 +53,7 @@ export default async (user: ILocalUser) => {
 		image: user.bannerId && renderImage(banner),
 		manuallyApprovesFollowers: user.isLocked,
 		publicKey: renderKey(user),
-		isCat: user.isCat
+		isCat: user.isCat,
+		attachment: attachment.length ? attachment : undefined
 	};
 };