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feat(realtime): enhance RealtimeChannel type #459

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feat(realtime): enhance RealtimeChannel type #459

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68 changes: 68 additions & 0 deletions src/RealtimeChannel.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,38 @@ export type RealtimeChannelOptions = {
}
}

type RealtimeBroadcastChangesPayloadBase = {
id: string
schema: string
table: string
}

Comment on lines +34 to +39
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Copilot AI Jun 2, 2025

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[nitpick] RealtimeBroadcastChangesPayloadBase overlaps with RealtimePostgresChangesPayloadBase (schema/table). Consider merging shared fields or extending one from the other to reduce duplication.

Suggested change
type RealtimeBroadcastChangesPayloadBase = {
id: string
schema: string
table: string
}
type RealtimeChangesPayloadBase = {
schema: string
table: string
}
type RealtimeBroadcastChangesPayloadBase = RealtimeChangesPayloadBase & {
id: string
}

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export type RealtimeBroadcastInsertPayload<T extends { [key: string]: any }> =
RealtimeBroadcastChangesPayloadBase & {
operation: `${REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.INSERT}`
record: T
old_record: null
}

export type RealtimeBroadcastUpdatePayload<T extends { [key: string]: any }> =
RealtimeBroadcastChangesPayloadBase & {
operation: `${REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.UPDATE}`
record: T
old_record: T
}

export type RealtimeBroadcastDeletePayload<T extends { [key: string]: any }> =
RealtimeBroadcastChangesPayloadBase & {
operation: `${REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.DELETE}`
record: null
old_record: T
}

export type RealtimeBroadcastPayload<T extends { [key: string]: any }> =
| RealtimeBroadcastInsertPayload<T>
| RealtimeBroadcastUpdatePayload<T>
| RealtimeBroadcastDeletePayload<T>

type RealtimePostgresChangesPayloadBase = {
schema: string
table: string
Expand Down Expand Up @@ -406,6 +438,42 @@ export default class RealtimeChannel {
payload: T
}) => void
): RealtimeChannel
on<T extends { [key: string]: any }>(
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[nitpick] Using T extends { [key: string]: any } is very loose. Consider constraining to Record<string, unknown> or a more specific shape to improve type safety.

Suggested change
on<T extends { [key: string]: any }>(
on<T extends Record<string, unknown>>(

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[nitpick] The multiple overloads for broadcast events are largely repetitive. You could consolidate them using a single overload with conditional types on filter.event to reduce duplication.

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type: `${REALTIME_LISTEN_TYPES.BROADCAST}`,
filter: { event: REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.ALL },
callback: (payload: {
type: `${REALTIME_LISTEN_TYPES.BROADCAST}`
event: REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.ALL
payload: RealtimeBroadcastPayload<T>
}) => void
): RealtimeChannel
on<T extends { [key: string]: any }>(
type: `${REALTIME_LISTEN_TYPES.BROADCAST}`,
filter: { event: REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.INSERT },
callback: (payload: {
type: `${REALTIME_LISTEN_TYPES.BROADCAST}`
event: REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.INSERT
payload: RealtimeBroadcastInsertPayload<T>
}) => void
): RealtimeChannel
on<T extends { [key: string]: any }>(
type: `${REALTIME_LISTEN_TYPES.BROADCAST}`,
filter: { event: REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.UPDATE },
callback: (payload: {
type: `${REALTIME_LISTEN_TYPES.BROADCAST}`
event: REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.UPDATE
payload: RealtimeBroadcastUpdatePayload<T>
}) => void
): RealtimeChannel
on<T extends { [key: string]: any }>(
type: `${REALTIME_LISTEN_TYPES.BROADCAST}`,
filter: { event: REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.DELETE },
callback: (payload: {
type: `${REALTIME_LISTEN_TYPES.BROADCAST}`
event: REALTIME_POSTGRES_CHANGES_LISTEN_EVENT.DELETE
payload: RealtimeBroadcastDeletePayload<T>
}) => void
): RealtimeChannel
on<T extends { [key: string]: any }>(
type: `${REALTIME_LISTEN_TYPES.SYSTEM}`,
filter: {},
Expand Down