adaptive-expressions
Version:
Common Expression Language
55 lines • 2.05 kB
JavaScript
;
/**
* @module adaptive-expressions
*/
/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const commonRegex_1 = require("../commonRegex");
const expressionEvaluator_1 = require("../expressionEvaluator");
const expressionType_1 = require("../expressionType");
const functionUtils_1 = require("../functionUtils");
const returnType_1 = require("../returnType");
/**
* Return true if a given string matches a specified regular expression pattern.
*/
class IsMatch extends expressionEvaluator_1.ExpressionEvaluator {
/**
* Initializes a new instance of the [IsMatch](xref:adaptive-expressions.IsMatch) class.
*/
constructor() {
super(expressionType_1.ExpressionType.IsMatch, IsMatch.evaluator(), returnType_1.ReturnType.Boolean, IsMatch.validator);
}
/**
* @private
*/
static evaluator() {
return functionUtils_1.FunctionUtils.applyWithError((args) => {
let value = false;
let error;
if (args[0] === undefined || args[0] === '') {
value = false;
error = 'regular expression is empty.';
}
else {
const regex = commonRegex_1.CommonRegex.CreateRegex(args[1].toString());
value = regex.test(args[0].toString());
}
return { value, error };
}, functionUtils_1.FunctionUtils.verifyStringOrNull);
}
/**
* @private
*/
static validator(expression) {
functionUtils_1.FunctionUtils.validateArityAndAnyType(expression, 2, 2, returnType_1.ReturnType.String);
const second = expression.children[1];
if (second.returnType === returnType_1.ReturnType.String && second.type === expressionType_1.ExpressionType.Constant) {
commonRegex_1.CommonRegex.CreateRegex(second.value.toString());
}
}
}
exports.IsMatch = IsMatch;
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