get public reactions from scylla

packages/backend/src/db/cql.ts

@@ -151,10 +151,10 @@ export const scyllaQueries = {
 			("id", "noteId", "userId", "reaction", "emoji", "createdAt")
 			VALUES (?, ?, ?, ?, ?, ?)`,
 		select: {
-			byNoteId: `SELECT * FROM reaction_by_id WHERE "noteId" IN ?`,
-			byUserId: `SELECT * FROM reaction_by_user_id WHERE "userId" IN ?`,
+			byNoteId: `SELECT * FROM reaction_by_id WHERE "noteId" = ?`,
+			byUserId: `SELECT * FROM reaction_by_user_id WHERE "userId" = ?`,
 			byNoteAndUser: `SELECT * FROM reaction WHERE "noteId" IN ? AND "userId" IN ?`,
-			byId: `SELECT * FROM reaction WHERE "id" IN ?`,
+			byId: `SELECT * FROM reaction WHERE "id" = ?`,
 		},
 		delete: `DELETE FROM reaction WHERE "noteId" = ? AND "userId" = ?`,
 	},

packages/backend/src/db/scylla.ts

@@ -262,7 +262,8 @@ export type FeedType =
 	| "user"
 	| "channel"
 	| "notification"
-	| "list";
+	| "list"
+	| "reaction";
 
 export function parseScyllaReaction(row: types.Row): ScyllaNoteReaction {
 	return {
@@ -310,6 +311,9 @@ export function preparePaginationQuery(
 		case "notification":
 			queryParts.push(prepared.notification.select.byTargetId);
 			break;
+		case "reaction":
+			queryParts.push(prepared.reaction.select.byUserId);
+			break;
 		default:
 			queryParts.push(prepared.note.select.byDate);
 	}
@@ -359,17 +363,19 @@ export async function execPaginationQuery(
 	},
 	filter?: {
 		note?: (_: ScyllaNote[]) => Promise<ScyllaNote[]>;
+		reaction?: (_: ScyllaNoteReaction[]) => Promise<ScyllaNoteReaction[]>;
 		notification?: (_: ScyllaNotification[]) => ScyllaNotification[];
 	},
 	userId?: User["id"],
 	maxPartitions = config.scylla?.sparseTimelineDays ?? 14,
-): Promise<ScyllaNote[] | ScyllaNotification[]> {
+): Promise<ScyllaNote[] | ScyllaNotification[] | ScyllaNoteReaction[]> {
 	if (!scyllaClient) return [];
 
 	switch (kind) {
 		case "home":
 		case "user":
 		case "notification":
+		case "reaction":
 			if (!userId) throw new Error(`Feed ${kind} needs userId`);
 			break;
 		case "renotes":
@@ -387,7 +393,7 @@ export async function execPaginationQuery(
 	let { query, untilDate, sinceDate } = preparePaginationQuery(kind, ps);
 
 	let scannedPartitions = 0;
-	const found: (ScyllaNote | ScyllaNotification)[] = [];
+	const found: ScyllaNote[] | ScyllaNotification[] | ScyllaNoteReaction[] = [];
 	const queryLimit = config.scylla?.queryLimit ?? 1000;
 	let foundLimit = ps.limit;
 	if (kind === "list" && ps.userIds) {
@@ -399,7 +405,7 @@ export async function execPaginationQuery(
 		const params: (Date | string | string[] | number)[] = [];
 		if (kind === "home" && userId) {
 			params.push(userId, untilDate, untilDate);
-		} else if (kind === "user" && userId) {
+		} else if (["user", "reaction"].includes(kind) && userId) {
 			params.push(userId, untilDate);
 		} else if (kind === "renotes" && ps.noteId) {
 			params.push(ps.noteId, untilDate);
@@ -429,15 +435,19 @@ export async function execPaginationQuery(
 		if (result.rowLength > 0) {
 			if (kind === "notification") {
 				const notifications = result.rows.map(parseScyllaNotification);
-				found.push(
+				(found as ScyllaNotification[]).push(
 					...(filter?.notification
 						? filter.notification(notifications)
 						: notifications),
 				);
 				untilDate = notifications[notifications.length - 1].createdAt;
+			} else if (kind === "reaction") {
+				const reactions = result.rows.map(parseScyllaReaction);
+				(found as ScyllaNoteReaction[]).push(...(filter?.reaction ? await filter.reaction(reactions) : reactions));
+				untilDate = reactions[reactions.length - 1].createdAt;
 			} else {
 				const notes = result.rows.map(parseScyllaNote);
-				found.push(...(filter?.note ? await filter.note(notes) : notes));
+				(found as ScyllaNote[]).push(...(filter?.note ? await filter.note(notes) : notes));
 				untilDate = notes[notes.length - 1].createdAt;
 			}
 		}
@@ -454,6 +464,8 @@ export async function execPaginationQuery(
 
 	if (kind === "notification") {
 		return found as ScyllaNotification[];
+	} else if (kind === "reaction") {
+		return found as ScyllaNoteReaction[];
 	}
 
 	return found as ScyllaNote[];

packages/backend/src/models/repositories/note-reaction.ts

@@ -39,9 +39,9 @@ export const NoteReactionRepository = db.getRepository(NoteReaction).extend({
 
 	async packMany(
 		src: NoteReaction[],
-		me?: { id: User["id"] } | null | undefined,
+		me?: { id: User["id"] } | null,
 		options?: {
-			withNote: booleam;
+			withNote: boolean;
 		},
 	): Promise<Packed<"NoteReaction">[]> {
 		const reactions = await Promise.allSettled(

packages/backend/src/server/api/endpoints/notes/reactions.ts

@@ -73,7 +73,7 @@ export default define(meta, paramDef, async (ps, user) => {
 	let reactions: NoteReaction[] = [];
 	if (scyllaClient) {
 		const scyllaQuery = [prepared.reaction.select.byNoteId]
-		const params: (string | string[] | number)[] = [[ps.noteId]];
+		const params: (string | string[] | number)[] = [ps.noteId];
 		if (ps.type) {
 			scyllaQuery.push(`AND "reaction" = ?`);
 			params.push(query.reaction as string)

packages/backend/src/server/api/endpoints/users/reactions.ts

@@ -3,6 +3,15 @@ import define from "../../define.js";
 import { makePaginationQuery } from "../../common/make-pagination-query.js";
 import { generateVisibilityQuery } from "../../common/generate-visibility-query.js";
 import { ApiError } from "../../error.js";
+import {
+	type ScyllaNoteReaction,
+	execPaginationQuery,
+	filterVisibility,
+	parseScyllaNote,
+	prepared,
+	scyllaClient,
+} from "@/db/scylla.js";
+import { LocalFollowingsCache } from "@/misc/cache.js";
 
 export const meta = {
 	tags: ["users", "reactions"],
@@ -49,10 +58,45 @@ export const paramDef = {
 export default define(meta, paramDef, async (ps, me) => {
 	const profile = await UserProfiles.findOneByOrFail({ userId: ps.userId });
 
-	if (me.id !== ps.userId && !profile.publicReactions) {
+	if (me?.id !== ps.userId && !profile.publicReactions) {
 		throw new ApiError(meta.errors.reactionsNotPublic);
 	}
 
+	if (scyllaClient) {
+		let followingUserIds: string[] = [];
+		if (me) {
+			followingUserIds = await LocalFollowingsCache.init(me.id).then((cache) =>
+				cache.getAll(),
+			);
+		}
+
+		const filter = async (reactions: ScyllaNoteReaction[]) => {
+			if (!scyllaClient) return reactions;
+			let noteIds = reactions.map(({ noteId }) => noteId);
+			if (me) {
+				const notes = await scyllaClient
+					.execute(prepared.note.select.byIds, [noteIds], { prepare: true })
+					.then((result) => result.rows.map(parseScyllaNote));
+				const filteredNoteIds = await filterVisibility(
+					notes,
+					me,
+					followingUserIds,
+				).then((notes) => notes.map(({ id }) => id));
+				noteIds = noteIds.filter((id) => filteredNoteIds.includes(id));
+			}
+
+			return reactions.filter((reaction) => noteIds.includes(reaction.noteId));
+		};
+
+		const foundReactions = (await execPaginationQuery(
+			"reaction",
+			ps,
+			{ reaction: filter },
+			ps.userId,
+		)) as ScyllaNoteReaction[];
+		return await NoteReactions.packMany(foundReactions, me, { withNote: true });
+	}
+
 	const query = makePaginationQuery(
 		NoteReactions.createQueryBuilder("reaction"),
 		ps.sinceId,