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import { createOrpcClient } from '@/libs/orpcClient';
// Services
import { auth } from '@/services/firebase';
// Types
import {
EventType,
SubscribeEvent,
MenuSocketUpdate,
WSReactionData,
WSSentimentData,
OwnCommentChangePayload,
} from '@/types/meal';
// Constants
import { ERROR_MESSAGES } from '@/constants/messages';
// Reaction counts ride on every lunch-menu event.
export const ReactionPayload = Schema.Struct({
id: Schema.String,
likes: Schema.Number,
dislikes: Schema.Number,
});
// Only present on classify-completion events (extra authorId field is ignored here).
export const ClassifiedCommentPayload = Schema.Struct({
id: Schema.String,
sentiment: Schema.String,
});
// Decode reaction counts; an invalid/missing payload yields undefined instead of failing.
const extractReactionUpdate = (
data: unknown,
): Effect.Effect<WSReactionData | undefined> =>
Schema.decodeUnknown(ReactionPayload)(data).pipe(
Effect.map(
(parsed): WSReactionData => ({
[parsed.id]: { likes: parsed.likes, dislikes: parsed.dislikes },
}),
),
Effect.orElseSucceed(() => undefined),
);
// Decode the classified comment (keyed by commentId) when present.
const decodeSentiment = (
data: SubscribeEvent['data'],
): Effect.Effect<WSSentimentData | undefined> =>
data.classifiedComment === undefined
? Effect.succeed(undefined)
: Schema.decodeUnknown(ClassifiedCommentPayload)(
data.classifiedComment,
).pipe(
Effect.map(
(comment): WSSentimentData => ({ [comment.id]: comment.sentiment }),
),
Effect.orElseSucceed(() => undefined),
);
const buildUpdate = (event: SubscribeEvent): Effect.Effect<MenuSocketUpdate> =>
Effect.all({
reaction: extractReactionUpdate(event.data),
sentiment: decodeSentiment(event.data),
}).pipe(
Effect.map(({ reaction, sentiment }) => ({
...(reaction ? { reaction } : {}),
...(sentiment ? { sentiment } : {}),
})),
);
export const subscribeService = (origin?: string) =>
Effect.scoped(
Effect.gen(function* (_) {
const user = auth.currentUser;
const token = user
? yield* _(Effect.promise(() => user.getIdToken(true)))
: undefined;
const client = createOrpcClient(token, origin);
// Wrap AsyncGenerator in Promise.resolve so Effect.promise accepts it
const iterator: AsyncGenerator<SubscribeEvent> = yield* _(
Effect.promise(() =>
Promise.resolve(client.socket.subscribeLunchMenu(undefined, {})),
),
);
// Convert AsyncGenerator → Stream and normalize each event into a MenuSocketUpdate:
// LUNCH_MENU → reaction counts and/or classified comment;
// COMMENT_CHANGE → comment delta + that day's counts (dashboard/admin);
// OWN_COMMENT_CHANGE → user's own comment delta (regular users, flat payload);
// unknown types → {}.
return Stream.fromAsyncIterable<SubscribeEvent, Error>(iterator, (e) =>
e instanceof Error ? e : new Error(ERROR_MESSAGES.DEFAULT),
).pipe(
Stream.mapEffect((event) => {
if (event.type === EventType.LUNCH_MENU) return buildUpdate(event);
if (event.type === EventType.COMMENT_CHANGE) {
return Effect.succeed<MenuSocketUpdate>({
...(event.data.commentChange
? { commentChange: event.data.commentChange }
: {}),
...(event.data.dayCounts
? { dayCounts: event.data.dayCounts }
: {}),
});
}
if (event.type === EventType.OWN_COMMENT_CHANGE) {
// OWN_COMMENT_CHANGE comes as flat payload: menuId, action, comment at data root
const ownCommentChange: OwnCommentChangePayload | undefined =
event.data.menuId && event.data.action && event.data.comment
? {
menuId: event.data.menuId,
action: event.data.action,
comment: event.data.comment,
}
: undefined;
return Effect.succeed<MenuSocketUpdate>({
...(ownCommentChange ? { ownCommentChange } : {}),
});
}
return Effect.succeed<MenuSocketUpdate>({});
}),
);
}),
);
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