53 lines
1.2 KiB
JavaScript
53 lines
1.2 KiB
JavaScript
class Subscriptions {
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constructor() {
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this.subscriptions = new Map();
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}
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add(subscription) {
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this.subscriptions.set(subscription.id, subscription);
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return this;
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}
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get(subscriptionId) {
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const subscription = this.subscriptions.get(subscriptionId);
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if (subscription === undefined) return null;
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return subscription;
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}
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update(subscription) {
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return this.add(subscription);
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}
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remove(subscriptionId) {
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this.subscriptions.delete(subscriptionId);
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return this;
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}
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forEach(cb) {
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this.subscriptions.forEach((value, key) => cb(key, value));
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}
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map(cb) {
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return Array.from(this.subscriptions.values())
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.map(subscription => cb(subscription.id, subscription));
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}
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ids() {
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return Array.from(this.subscriptions.keys());
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}
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firstOrNull() {
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const first = this.subscriptions.values().next().value;
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if (first === undefined) return null;
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return first;
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}
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clone() {
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const c = new Subscriptions();
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c.subscriptions = new Map(this.subscriptions);
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return c;
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}
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}
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export default Subscriptions;
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