add: custom like emoji per instance, fix like

This fixes the fact that likes on mastodon didn't get federated properly and let's instance admins choose a custom emoji

packages/backend/migration/1699819257000-defaultLike.js

@@ -0,0 +1,11 @@
+export class instanceDefaultLike1699819257000 {
+    name = 'instanceDefaultLike1699819257000'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "meta" ADD "defaultLike" character varying(500) DEFAULT '❤️'`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "defaultLike"`);
+    }
+}

packages/backend/src/core/activitypub/ApRendererService.ts

@@ -23,7 +23,7 @@ import { MfmService } from '@/core/MfmService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { DriveFileEntityService } from '@/core/entities/DriveFileEntityService.js';
 import type { MiUserKeypair } from '@/models/UserKeypair.js';
-import type { UsersRepository, UserProfilesRepository, NotesRepository, DriveFilesRepository, PollsRepository } from '@/models/_.js';
+import type { UsersRepository, UserProfilesRepository, NotesRepository, DriveFilesRepository, PollsRepository, InstancesRepository } from '@/models/_.js';
 import { bindThis } from '@/decorators.js';
 import { CustomEmojiService } from '@/core/CustomEmojiService.js';
 import { isNotNull } from '@/misc/is-not-null.js';
@@ -31,6 +31,7 @@ import { IdService } from '@/core/IdService.js';
 import { LdSignatureService } from './LdSignatureService.js';
 import { ApMfmService } from './ApMfmService.js';
 import type { IAccept, IActivity, IAdd, IAnnounce, IApDocument, IApEmoji, IApHashtag, IApImage, IApMention, IBlock, ICreate, IDelete, IFlag, IFollow, IKey, ILike, IMove, IObject, IPost, IQuestion, IReject, IRemove, ITombstone, IUndo, IUpdate } from './type.js';
+import { MetaService } from '../MetaService.js';
 
 @Injectable()
 export class ApRendererService {
@@ -53,6 +54,9 @@ export class ApRendererService {
 		@Inject(DI.pollsRepository)
 		private pollsRepository: PollsRepository,
 
+		@Inject(DI.instancesRepository)
+		private instancesRepository: InstancesRepository,
+
 		private customEmojiService: CustomEmojiService,
 		private userEntityService: UserEntityService,
 		private driveFileEntityService: DriveFileEntityService,
@@ -61,6 +65,7 @@ export class ApRendererService {
 		private apMfmService: ApMfmService,
 		private mfmService: MfmService,
 		private idService: IdService,
+		private metaService: MetaService,
 	) {
 	}
 
@@ -265,14 +270,26 @@ export class ApRendererService {
 	@bindThis
 	public async renderLike(noteReaction: MiNoteReaction, note: { uri: string | null }): Promise<ILike> {
 		const reaction = noteReaction.reaction;
+		const meta = await this.metaService.fetch(true);
+		let isMastodon = false;
 
+		if (meta.defaultLike && reaction.replaceAll(':', '') === meta.defaultLike.replaceAll(':', '')) {
+			const note = await this.notesRepository.findOneBy({ id: noteReaction.noteId });
+
+			if (note && note.userHost) {
+				const instance = await this.instancesRepository.findOneBy({ host: note.userHost });
+
+				if (instance && instance.softwareName === 'mastodon') isMastodon = true;
+			}
+		}
+		
 		const object: ILike = {
 			type: 'Like',
 			id: `${this.config.url}/likes/${noteReaction.id}`,
 			actor: `${this.config.url}/users/${noteReaction.userId}`,
 			object: note.uri ? note.uri : `${this.config.url}/notes/${noteReaction.noteId}`,
-			content: reaction,
-			_misskey_reaction: reaction,
+			content: isMastodon ? undefined : reaction,
+			_misskey_reaction: isMastodon ? undefined : reaction,
 		};
 
 		if (reaction.startsWith(':')) {

packages/backend/src/models/Meta.ts

@@ -533,4 +533,10 @@ export class MiMeta {
 		default: 0,
 	})
 	public notesPerOneAd: number;
+
+	@Column('varchar', {
+		length: 500,
+		nullable: true,
+	})
+	public defaultLike: string | null;
 }

packages/backend/src/queue/processors/ImportNotesProcessorService.ts

@@ -364,7 +364,7 @@ export class ImportNotesProcessorService {
 		let title;
 		const files: MiDriveFile[] = [];
 
-		function decodeIGString(str: any) {
+		function decodeIGString(str: string) {
 			const arr = [];
 			for (let i = 0; i < str.length; i++) {
 				arr.push(str.charCodeAt(i));

packages/backend/src/server/api/endpoints/admin/meta.ts

@@ -386,6 +386,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				logoImageUrl: instance.logoImageUrl,
 				defaultLightTheme: instance.defaultLightTheme,
 				defaultDarkTheme: instance.defaultDarkTheme,
+				defaultLike: instance.defaultLike,
 				enableEmail: instance.enableEmail,
 				enableServiceWorker: instance.enableServiceWorker,
 				translatorAvailable: instance.deeplAuthKey != null,

packages/backend/src/server/api/endpoints/admin/update-meta.ts

@@ -56,6 +56,7 @@ export const paramDef = {
 		description: { type: 'string', nullable: true },
 		defaultLightTheme: { type: 'string', nullable: true },
 		defaultDarkTheme: { type: 'string', nullable: true },
+		defaultLike: { type: 'string', nullable: true },
 		cacheRemoteFiles: { type: 'boolean' },
 		cacheRemoteSensitiveFiles: { type: 'boolean' },
 		emailRequiredForSignup: { type: 'boolean' },
@@ -240,6 +241,10 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				set.defaultDarkTheme = ps.defaultDarkTheme;
 			}
 
+			if (ps.defaultLike !== undefined) {
+				set.defaultLike = ps.defaultLike;
+			}
+
 			if (ps.cacheRemoteFiles !== undefined) {
 				set.cacheRemoteFiles = ps.cacheRemoteFiles;
 			}

packages/backend/src/server/api/endpoints/meta.ts

@@ -84,6 +84,10 @@ export const meta = {
 				type: 'string',
 				optional: false, nullable: true,
 			},
+			defaultLike: {
+				type: 'string',
+				optional: false, nullable: true,
+			},
 			disableRegistration: {
 				type: 'boolean',
 				optional: false, nullable: false,
@@ -334,6 +338,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				// クライアントの手間を減らすためあらかじめJSONに変換しておく
 				defaultLightTheme: instance.defaultLightTheme ? JSON.stringify(JSON5.parse(instance.defaultLightTheme)) : null,
 				defaultDarkTheme: instance.defaultDarkTheme ? JSON.stringify(JSON5.parse(instance.defaultDarkTheme)) : null,
+				defaultLike: instance.defaultLike,
 				ads: ads.map(ad => ({
 					id: ad.id,
 					url: ad.url,