adaptive-expressions
Version:
Common Expression Language
70 lines • 2.42 kB
JavaScript
;
/**
* @module adaptive-expressions
*/
/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.Merge = void 0;
const expressionEvaluator_1 = require("../expressionEvaluator");
const expressionType_1 = require("../expressionType");
const functionUtils_1 = require("../functionUtils");
const returnType_1 = require("../returnType");
/**
* Merge multiple object(json) into one object(json).
* If the item is array, the elements of the array are merged as well.
*/
class Merge extends expressionEvaluator_1.ExpressionEvaluator {
/**
* Initializes a new instance of the [Merge](xref:adaptive-expressions.Merge) class.
*/
constructor() {
super(expressionType_1.ExpressionType.Merge, Merge.evaluator(), returnType_1.ReturnType.Object, functionUtils_1.FunctionUtils.validateAtLeastOne);
}
/**
* @private
*/
static evaluator() {
return functionUtils_1.FunctionUtils.applyWithError((args) => {
const result = {};
for (const arg of args) {
const objectResult = this.parseToObjectList(arg);
if (objectResult.error != null) {
return { value: undefined, error: objectResult.error };
}
for (const item of objectResult.result) {
Object.assign(result, item);
}
}
return { value: result, error: undefined };
});
}
static parseToObjectList(arg) {
const result = [];
let error;
if (arg == null) {
error = `The argument ${arg} must be a JSON object or array.`;
}
else if (Array.isArray(arg)) {
for (const item of arg) {
if (typeof item === 'object' && !Array.isArray(item)) {
result.push(item);
}
else {
error = `The argument ${item} in array must be a JSON object.`;
}
}
}
else if (typeof arg === 'object') {
result.push(arg);
}
else {
error = `The argument ${arg} must be a JSON object or array.`;
}
return { result: result, error: error };
}
}
exports.Merge = Merge;
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