pip-services3-commons-node
Version:
Portable abstractions and patterns for Pip.Services in Node.js
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/** @module convert */
/** @hidden */
var _ = require('lodash');
/**
* Converts arbitrary values to boolean values using extended conversion rules:
* - Numbers: <>0 are true, =0 are false
* - Strings: "true", "yes", "T", "Y", "1" are true; "false", "no", "F", "N" are false
* - DateTime: <>0 total milliseconds are true, =0 are false
*
* ### Example ###
*
* let value1 = BooleanConverter.toNullableBoolean(true); // true
* let value2 = BooleanConverter.toNullableBoolean("yes"); // true
* let value3 = BooleanConverter.toNullableBoolean(123); // true
* let value4 = BooleanConverter.toNullableBoolean({}); // null
*/
var BooleanConverter = /** @class */ (function () {
function BooleanConverter() {
}
/**
* Converts value into boolean or returns null when conversion is not possible.
*
* @param value the value to convert.
* @returns boolean value or null when convertion is not supported.
*/
BooleanConverter.toNullableBoolean = function (value) {
if (value == null)
return null;
if (_.isBoolean(value))
return value;
if (_.isNumber(value))
return !!value;
value = value.toString().toLowerCase();
if (value == '1' || value == 'true' || value == 't' || value == 'yes' || value == 'y')
return true;
if (value == '0' || value == 'false' || value == 'f' || value == 'no' || value == 'n')
return false;
return null;
};
/**
* Converts value into boolean or returns false when conversion is not possible.
*
* @param value the value to convert.
* @returns boolean value or false when conversion is not supported.
*
* @see [[toBooleanWithDefault]]
*/
BooleanConverter.toBoolean = function (value) {
return BooleanConverter.toBooleanWithDefault(value, false);
};
/**
* Converts value into boolean or returns default value when conversion is not possible
*
* @param value the value to convert.
* @param defaultValue the default value
* @returns boolean value or default when conversion is not supported.
*
* @see [[toNullableBoolean]]
*/
BooleanConverter.toBooleanWithDefault = function (value, defaultValue) {
if (defaultValue === void 0) { defaultValue = false; }
var result = BooleanConverter.toNullableBoolean(value);
return result != null ? result : defaultValue;
};
return BooleanConverter;
}());
exports.BooleanConverter = BooleanConverter;
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