forked from off-topic/apps.apple.com
65 lines
2.6 KiB
JavaScript
65 lines
2.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ActionDispatcher = void 0;
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const optional_1 = require("@jet/environment/types/optional");
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class ActionDispatcher {
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constructor(metricsPipeline) {
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this.implementations = {};
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this.metricsPipeline = metricsPipeline;
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}
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register(type, implementation) {
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if (type in this.implementations) {
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console.error(`An implementation is already registered for ${type}`);
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}
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this.implementations[type] = implementation;
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}
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async perform(action, metricsBehavior) {
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if (!(action.$kind in this.implementations)) {
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// 1. If there is no implementation registered for the type of action
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// we were passed, we check for a chained dispatcher to forward to.
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// If one is found, we forward this call without doing any work.
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// If none is found, we give up.
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if (optional_1.isSome(this.next)) {
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return await this.next.perform(action, metricsBehavior);
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}
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else {
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return "unsupported";
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}
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}
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// 2. We have an implementation for the action we were given.
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// We are responsible for processing metrics for that action.
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this.processMetrics(action, metricsBehavior);
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if (optional_1.isSome(this.next)) {
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// 3a. If we have another dispatcher we are chained to, we forward to it
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// if the implementation we have for the given action decides it cannot
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// support performing it.
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const outcome = await this.implementations[action.$kind](action);
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if (outcome === "unsupported") {
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return await this.next.perform(action, { behavior: "notProcessed" });
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}
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else {
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return outcome;
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}
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}
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else {
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// 3b. We hand off control to the implementation we have for the given action type.
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// If the implementation cannot perform the action, we give up.
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return await this.implementations[action.$kind](action);
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}
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}
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processMetrics(action, metricsBehavior) {
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if (metricsBehavior.behavior === "notProcessed") {
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return;
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}
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const actionMetrics = action.actionMetrics;
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const context = {
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customMetrics: actionMetrics.custom,
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pageFields: metricsBehavior.context.pageFields,
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};
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action.actionMetrics.data.forEach((data) => {
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this.metricsPipeline.process(data, context);
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});
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}
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}
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exports.ActionDispatcher = ActionDispatcher;
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