43 lines
1.3 KiB
JavaScript
43 lines
1.3 KiB
JavaScript
/**
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* @private
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* (For internal use in stripe-node.)
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* Wrapper around the Event Web API.
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*/
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class _StripeEvent extends Event {
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constructor(eventName, data) {
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super(eventName);
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this.data = data;
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}
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}
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/** Minimal EventEmitter wrapper around EventTarget. */
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export class StripeEmitter {
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constructor() {
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this.eventTarget = new EventTarget();
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this.listenerMapping = new Map();
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}
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on(eventName, listener) {
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const listenerWrapper = (event) => {
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listener(event.data);
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};
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this.listenerMapping.set(listener, listenerWrapper);
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return this.eventTarget.addEventListener(eventName, listenerWrapper);
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}
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removeListener(eventName, listener) {
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const listenerWrapper = this.listenerMapping.get(listener);
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this.listenerMapping.delete(listener);
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return this.eventTarget.removeEventListener(eventName, listenerWrapper);
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}
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once(eventName, listener) {
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const listenerWrapper = (event) => {
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listener(event.data);
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};
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this.listenerMapping.set(listener, listenerWrapper);
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return this.eventTarget.addEventListener(eventName, listenerWrapper, {
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once: true,
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});
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}
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emit(eventName, data) {
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return this.eventTarget.dispatchEvent(new _StripeEvent(eventName, data));
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}
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}
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