@iota-pico/core/dist/helpers/stringHelper.js

IOTA Pico Framework Core

Object.defineProperty(exports, "__esModule", { value: true });
/**
 * String helper methods.
 */
class StringHelper {
    /**
     * Is the value a string.
     * @param value Object to test for its stringyness.
     * @returns True if the object is a string.
     */
    static isString(value) {
        return value === null || value === undefined
            ? false : Object.prototype.toString.call(value) === "[object String]";
    }
    /**
     * Is the value a string that is empty.
     * @param value Object to test for its no emptyness.
     * @returns True if the object is an empty string.
     */
    static isEmpty(value) {
        return !StringHelper.isString(value) || value.length === 0;
    }
    /**
     * Is the string all ASCII characters.
     * @param value string to test if is is ASCII.
     * @returns True if the object is all ASCII.
     */
    static isASCII(value) {
        return value === null || value === undefined
            ? false : /^[\x00-\x7F]*$/.test(value);
    }
    /**
     * Encode non ASCII characters with control characters.
     * @param value The string value to escape.
     * @returns The escaped version of the string.
     */
    static encodeNonASCII(value) {
        return StringHelper.isString(value) ? value.replace(/[\u0080-\uFFFF]/g, (chr) => `\\u${(`0000${chr.charCodeAt(0).toString(16)}`).substr(-4)}`) : undefined;
    }
    /**
     * Decode control characters to ASCII.
     * @param value The encoded string to convert back to ASCII.
     * @returns The decoded version of the string.
     */
    static decodeNonASCII(value) {
        return StringHelper.isString(value) ? value.replace(/\\u([\d\w]{4})/gi, (match, grp) => String.fromCharCode(parseInt(grp, 16))) : undefined;
    }
}
exports.StringHelper = StringHelper;
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