@aws-cdk/aws-cloudwatch/lib/private/drop-empty-object-at-the-end-of-an-array-token.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.DropEmptyObjectAtTheEndOfAnArray = void 0;
const cdk = require("@aws-cdk/core");
const object_1 = require("./object");
/**
 * A Token object that will drop the last element of an array if it is an empty object
 *
 * Necessary to prevent options objects that only contain "region" and "account" keys
 * that evaluate to "undefined" from showing up in the rendered JSON.
 */
class DropEmptyObjectAtTheEndOfAnArray {
    constructor(value) {
        this.value = value;
        this.creationStack = cdk.captureStackTrace();
    }
    resolve(context) {
        context.registerPostProcessor(this);
        return context.resolve(this.value);
    }
    postProcess(o, _context) {
        if (!Array.isArray(o)) {
            return o;
        }
        const lastEl = o[o.length - 1];
        if (typeof lastEl === 'object' && lastEl !== null && Object.keys(object_1.dropUndefined(lastEl)).length === 0) {
            return o.slice(0, o.length - 1);
        }
        return o;
    }
}
exports.DropEmptyObjectAtTheEndOfAnArray = DropEmptyObjectAtTheEndOfAnArray;
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