implement mandatory CW for notes (resolves #910)

packages/backend/src/core/WebhookTestService.ts

@@ -127,6 +127,7 @@ function generateDummyNote(override?: Partial<MiNote>): MiNote {
 		renoteUserInstance: null,
 		updatedAt: null,
 		processErrors: [],
+		mandatoryCW: null,
 		...override,
 	};
 }

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

@@ -497,6 +497,9 @@ export class ApRendererService {
 		let summary = note.cw === '' ? String.fromCharCode(0x200B) : note.cw;
 
 		// Apply mandatory CW, if applicable
+		if (note.mandatoryCW) {
+			summary = appendContentWarning(summary, note.mandatoryCW);
+		}
 		if (author.mandatoryCW) {
 			summary = appendContentWarning(summary, author.mandatoryCW);
 		}

packages/backend/src/core/entities/NoteEntityService.ts

@@ -651,6 +651,7 @@ export class NoteEntityService implements OnModuleInit {
 			user: packedUsers?.get(note.userId) ?? this.userEntityService.pack(note.user ?? note.userId, me),
 			text: text,
 			cw: note.cw,
+			mandatoryCW: note.mandatoryCW,
 			visibility: note.visibility,
 			localOnly: note.localOnly,
 			reactionAcceptance: note.reactionAcceptance,