Ghost/ghost/admin/app/components/modal-member-tier.js

import ModalComponent from 'ghost-admin/components/modal-base';
import {action} from '@ember/object';
import {inject as service} from '@ember/service';
import {task} from 'ember-concurrency';
import {tracked} from '@glimmer/tracking';

export default class ModalMemberTier extends ModalComponent {
    @service store;
    @service ghostPaths;
    @service ajax;

    @tracked price;
    @tracked tier;
    @tracked tiers = [];
    @tracked selectedTier = null;
    @tracked loadingTiers = false;

    @task({drop: true})
    *fetchTiers() {
        this.tiers = yield this.store.query('tier', {filter: 'type:paid+active:true', include: 'monthly_price,yearly_price,benefits'});

        this.loadingTiers = false;
        if (this.tiers.length > 0) {
            this.selectedTier = this.tiers.firstObject.id;
        }
    }

    get activeSubscriptions() {
        const subscriptions = this.member.get('subscriptions') || [];
        return subscriptions.filter((sub) => {
            return ['active', 'trialing', 'unpaid', 'past_due'].includes(sub.status);
        });
    }

    get member() {
        return this.model;
    }

    get cannotAddPrice() {
        return !this.price || this.price.amount !== 0;
    }

    @action
    setup() {
        this.loadingTiers = true;
        this.fetchTiers.perform();
    }

    @action
    setTier(tierId) {
        this.selectedTier = tierId;
    }

    @action
    setPrice(price) {
        this.price = price;
    }

    @action
    confirmAction() {
        return this.addTier.perform();
    }

    @action
    close(event) {
        event?.preventDefault?.();
        this.closeModal();
    }

    @task({drop: true})
    *addTier() {
        const url = `${this.ghostPaths.url.api(`members/${this.member.get('id')}`)}?include=tiers`;

        // Cancel existing active subscriptions for member
        for (let i = 0; i < this.activeSubscriptions.length; i++) {
            const subscription = this.activeSubscriptions[i];
            const cancelUrl = this.ghostPaths.url.api(`members/${this.member.get('id')}/subscriptions/${subscription.id}`);
            yield this.ajax.put(cancelUrl, {
                data: {
                    status: 'canceled'
                }
            });
        }

        const response = yield this.ajax.put(url, {
            data: {
                members: [{
                    id: this.member.get('id'),
                    email: this.member.get('email'),
                    tiers: [{
                        id: this.selectedTier
                    }]
                }]
            }
        });

        this.store.pushPayload('member', response);
        this.closeModal();
        return response;
    }

    actions = {
        confirm() {
            this.confirmAction(...arguments);
        },
        // needed because ModalBase uses .send() for keyboard events
        closeModal() {
            this.close();
        }
    };
}