Ghost/ghost/admin/app/components/posts/post-activity-feed.js

import Component from '@glimmer/component';
import {action} from '@ember/object';
import {inject as service} from '@ember/service';

export default class PostActivityFeed extends Component {
    @service feature;

    _pageSize = 5;
    _eventTypes = {
        sent: ['email_sent_event', 'email_delivered_event', 'email_failed_event'],
        opened: ['email_opened_event'],
        clicked: ['aggregated_click_event'],
        feedback: ['feedback_event'],
        conversion: ['subscription_event', 'signup_event']
    };

    get getEventTypes() {
        return this._eventTypes[this.args.eventType];
    }

    get pageSize() {
        return this._pageSize;
    }

    get eventType() {
        return this.args.eventType;
    }

    // calculate amount of empty rows which require to keep table height the same for each tab/page
    @action
    getAmountOfStubs({data}) {
        const stubs = this._pageSize - data.length;

        return new Array(stubs).fill(1);
    }

    @action
    isPreviousButtonDisabled({hasReachedStart, isLoading}) {
        return hasReachedStart || isLoading;
    }

    @action
    isNextButtonDisabled({hasReachedEnd, isLoading}) {
        return hasReachedEnd || isLoading;
    }

    @action
    isPaginationNotNeeded({totalEvents}) {
        return (totalEvents <= this._pageSize);
    }

    @action
    areStubsNeeded({totalEvents}) {
        return totalEvents > this._pageSize || this.args.eventType === 'feedback';
    }
}