@towns-protocol/sdk/dist/views/streams/streamMemberIds.js

For more details, visit the following resources:

import { ObservableRecord } from '../../observable/observableRecord';
// sorted list of user ids in the stream
export class StreamMemberIdsView extends ObservableRecord {
    constructor() {
        super({
            defaultValue: [],
        });
    }
    setMembers(streamId, memberIds) {
        this.setValueFor(streamId, memberIds.sort());
    }
    addMember(streamId, memberId) {
        this.set((prev) => {
            const newMemberIds = [memberId, ...(prev[streamId] ?? [])].sort();
            return {
                ...prev,
                [streamId]: newMemberIds,
            };
        });
    }
    removeMember(streamId, memberId) {
        this.set((prev) => {
            if (!prev[streamId]) {
                return prev;
            }
            const newMemberIds = prev[streamId]?.filter((id) => id !== memberId);
            return {
                ...prev,
                [streamId]: newMemberIds,
            };
        });
    }
}
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