@river-build/sdk/dist/sync-agent/timeline/models/reactions.js

For more details, visit the following resources:

import { Observable } from '../../../observable/observable';
import { RiverTimelineEvent } from './timeline-types';
export class Reactions extends Observable {
    constructor(initialValue = {}) {
        super(initialValue);
    }
    get(parentId) {
        // due to delete, removeEvent can leave empty keys in the map, so we need to check for that
        const reactions = this.value[parentId];
        return reactions && Object.keys(reactions).length > 0 ? reactions : undefined;
    }
    update(fn) {
        this.setValue(fn(this.value));
    }
    reset() {
        this.setValue({});
    }
    removeEvent(event) {
        const parentId = event.reactionParentId;
        const content = event.content?.kind === RiverTimelineEvent.Reaction ? event.content : undefined;
        if (!content || !parentId || !this.value[parentId]) {
            return;
        }
        const reactionName = content.reaction;
        const senderId = event.sender.id;
        const mutation = { ...this.value };
        if (mutation[parentId]?.[reactionName]?.[senderId]) {
            // delete sender entry
            delete mutation[parentId][reactionName][senderId];
            // if reaction is empty, delete it
            if (Object.keys(mutation[parentId][reactionName]).length === 0) {
                delete mutation[parentId][reactionName];
            }
            // if parent has no reactions, delete it
            if (Object.keys(mutation[parentId]).length === 0) {
                delete mutation[parentId];
            }
        }
        this.setValue(mutation);
    }
    addEvent(event) {
        const parentId = event.reactionParentId;
        if (!parentId) {
            return;
        }
        this.update((reactions) => ({
            ...reactions,
            [parentId]: this.addReaction(event, reactions[parentId]),
        }));
    }
    addReaction(event, entry) {
        const content = event.content?.kind === RiverTimelineEvent.Reaction ? event.content : undefined;
        if (!content) {
            return entry ?? {};
        }
        const reactionName = content.reaction;
        const senderId = event.sender.id;
        return {
            ...entry,
            [reactionName]: {
                ...entry?.[reactionName],
                [senderId]: { eventId: event.eventId },
            },
        };
    }
}
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