adaptive-expressions
Version:
Common Expression Language
61 lines • 2.16 kB
JavaScript
/**
* @module adaptive-expressions
*/
/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.Join = void 0;
const expressionEvaluator_1 = require("../expressionEvaluator");
const expressionType_1 = require("../expressionType");
const functionUtils_1 = require("../functionUtils");
const returnType_1 = require("../returnType");
/**
* Return a string that has all the items from an array, with each character separated by a delimiter.
*/
class Join extends expressionEvaluator_1.ExpressionEvaluator {
/**
* Initializes a new instance of the Join class.
*/
constructor() {
super(expressionType_1.ExpressionType.Join, Join.evaluator, returnType_1.ReturnType.String, Join.validator);
}
/**
* @private
*/
static evaluator(expression, state, options) {
let value;
const { args, error: childrenError } = functionUtils_1.FunctionUtils.evaluateChildren(expression, state, options);
let error = childrenError;
if (!error) {
if (!Array.isArray(args[0])) {
error = `${expression.children[0]} evaluates to ${args[0]} which is not a list.`;
}
else {
if (args.length === 2) {
value = args[0].join(args[1]);
}
else {
if (args[0].length < 3) {
value = args[0].join(args[2]);
}
else {
const firstPart = args[0].slice(0, args[0].length - 1).join(args[1]);
value = firstPart.concat(args[2], args[0][args[0].length - 1]);
}
}
}
}
return { value, error };
}
/**
* @private
*/
static validator(expression) {
functionUtils_1.FunctionUtils.validateOrder(expression, [returnType_1.ReturnType.String], returnType_1.ReturnType.Array, returnType_1.ReturnType.String);
}
}
exports.Join = Join;
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