convertISO8601ToMs.ts

/** 
 * Returns duration in ms from ISO 8601 string.
 * E.g. "PT15M33S" is converted to 933000
 */
export function convertISO8601ToMs(duration: string): number  {
    const time_extractor = /^P([0-9]*D)?T([0-9]*H)?([0-9]*M)?([0-9]*S)?$/i;
    const extracted = time_extractor.exec(duration);
    if (extracted) {
        const days = parseInt(extracted[1], 10) || 0;
        const hours = parseInt(extracted[2], 10) || 0;
        const minutes = parseInt(extracted[3], 10) || 0;
        const seconds = parseInt(extracted[4], 10) || 0;
        return (days * 24 * 3600 * 1000) + (hours * 3600 * 1000) + (minutes * 60 * 1000) + (seconds * 1000);
    }
    return 0;
}