@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
181 lines • 22.4 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const token_1 = require("./token");
/**
* Represents a length of time.
*
* The amount can be specified either as a literal value (e.g: `10`) which
* cannot be negative, or as an unresolved number token.
*
* Whent he amount is passed as an token, unit conversion is not possible.
*/
class Duration {
constructor(amount, unit) {
if (!token_1.Token.isUnresolved(amount) && amount < 0) {
throw new Error(`Duration amounts cannot be negative. Received: ${amount}`);
}
this.amount = amount;
this.unit = unit;
}
/**
* @param amount the amount of Milliseconds the `Duration` will represent.
* @returns a new `Duration` representing `amount` ms.
*/
static millis(amount) {
return new Duration(amount, TimeUnit.Milliseconds);
}
/**
* @param amount the amount of Seconds the `Duration` will represent.
* @returns a new `Duration` representing `amount` Seconds.
*/
static seconds(amount) {
return new Duration(amount, TimeUnit.Seconds);
}
/**
* @param amount the amount of Minutes the `Duration` will represent.
* @returns a new `Duration` representing `amount` Minutes.
*/
static minutes(amount) {
return new Duration(amount, TimeUnit.Minutes);
}
/**
* @param amount the amount of Hours the `Duration` will represent.
* @returns a new `Duration` representing `amount` Hours.
*/
static hours(amount) {
return new Duration(amount, TimeUnit.Hours);
}
/**
* @param amount the amount of Days the `Duration` will represent.
* @returns a new `Duration` representing `amount` Days.
*/
static days(amount) {
return new Duration(amount, TimeUnit.Days);
}
/**
* Parse a period formatted according to the ISO 8601 standard (see https://www.iso.org/fr/standard/70907.html).
*
* @param duration an ISO-formtted duration to be parsed.
* @returns the parsed `Duration`.
*/
static parse(duration) {
const matches = duration.match(/^PT(?:(\d+)D)?(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?$/);
if (!matches) {
throw new Error(`Not a valid ISO duration: ${duration}`);
}
const [, days, hours, minutes, seconds] = matches;
if (!days && !hours && !minutes && !seconds) {
throw new Error(`Not a valid ISO duration: ${duration}`);
}
return Duration.seconds(_toInt(seconds)
+ (_toInt(minutes) * TimeUnit.Minutes.inSeconds)
+ (_toInt(hours) * TimeUnit.Hours.inSeconds)
+ (_toInt(days) * TimeUnit.Days.inSeconds));
function _toInt(str) {
if (!str) {
return 0;
}
return Number(str);
}
}
/**
* @returns the value of this `Duration` expressed in Seconds.
*/
toMilliseconds(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Milliseconds, opts);
}
/**
* @returns the value of this `Duration` expressed in Seconds.
*/
toSeconds(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Seconds, opts);
}
/**
* @returns the value of this `Duration` expressed in Minutes.
*/
toMinutes(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Minutes, opts);
}
/**
* @returns the value of this `Duration` expressed in Hours.
*/
toHours(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Hours, opts);
}
/**
* @returns the value of this `Duration` expressed in Days.
*/
toDays(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Days, opts);
}
/**
* @returns an ISO 8601 representation of this period (see https://www.iso.org/fr/standard/70907.html).
*/
toISOString() {
if (this.amount === 0) {
return 'PT0S';
}
switch (this.unit) {
case TimeUnit.Seconds:
return `PT${this.fractionDuration('S', 60, Duration.minutes)}`;
case TimeUnit.Minutes:
return `PT${this.fractionDuration('M', 60, Duration.hours)}`;
case TimeUnit.Hours:
return `PT${this.fractionDuration('H', 24, Duration.days)}`;
case TimeUnit.Days:
return `PT${this.amount}D`;
default:
throw new Error(`Unexpected time unit: ${this.unit}`);
}
}
/**
* Returns a string representation of this `Duration` that is also a Token that cannot be successfully resolved. This
* protects users against inadvertently stringifying a `Duration` object, when they should have called one of the
* `to*` methods instead.
*/
toString() {
return token_1.Token.asString(() => {
throw new Error(`Duration.toString() was used, but .toSeconds, .toMinutes or .toDays should have been called instead`);
}, { displayHint: `${this.amount} ${this.unit.label}` });
}
fractionDuration(symbol, modulus, next) {
if (this.amount < modulus) {
return `${this.amount}${symbol}`;
}
const remainder = this.amount % modulus;
const quotient = next((this.amount - remainder) / modulus).toISOString().slice(2);
return remainder > 0
? `${quotient}${remainder}${symbol}`
: quotient;
}
}
exports.Duration = Duration;
class TimeUnit {
constructor(label, inSeconds) {
this.label = label;
this.inSeconds = inSeconds;
}
toString() {
return this.label;
}
}
TimeUnit.Milliseconds = new TimeUnit('millis', 0.001);
TimeUnit.Seconds = new TimeUnit('seconds', 1);
TimeUnit.Minutes = new TimeUnit('minutes', 60);
TimeUnit.Hours = new TimeUnit('hours', 3600);
TimeUnit.Days = new TimeUnit('days', 86400);
function convert(amount, fromUnit, toUnit, { integral = true }) {
if (fromUnit.inSeconds === toUnit.inSeconds) {
return amount;
}
const multiplier = fromUnit.inSeconds / toUnit.inSeconds;
if (token_1.Token.isUnresolved(amount)) {
throw new Error(`Unable to perform time unit conversion on un-resolved token ${amount}.`);
}
const value = amount * multiplier;
if (!Number.isInteger(value) && integral) {
throw new Error(`'${amount} ${fromUnit}' cannot be converted into a whole number of ${toUnit}.`);
}
return value;
}
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{ Token } from \"./token\";\n\n/**\n * Represents a length of time.\n *\n * The amount can be specified either as a literal value (e.g: `10`) which\n * cannot be negative, or as an unresolved number token.\n *\n * Whent he amount is passed as an token, unit conversion is not possible.\n */\nexport class Duration {\n  /**\n   * @param amount the amount of Milliseconds the `Duration` will represent.\n   * @returns a new `Duration` representing `amount` ms.\n   */\n  public static millis(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Milliseconds);\n  }\n\n  /**\n   * @param amount the amount of Seconds the `Duration` will represent.\n   * @returns a new `Duration` representing `amount` Seconds.\n   */\n  public static seconds(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Seconds);\n  }\n\n  /**\n   * @param amount the amount of Minutes the `Duration` will represent.\n   * @returns a new `Duration` representing `amount` Minutes.\n   */\n  public static minutes(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Minutes);\n  }\n\n  /**\n   * @param amount the amount of Hours the `Duration` will represent.\n   * @returns a new `Duration` representing `amount` Hours.\n   */\n  public static hours(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Hours);\n  }\n\n  /**\n   * @param amount the amount of Days the `Duration` will represent.\n   * @returns a new `Duration` representing `amount` Days.\n   */\n  public static days(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Days);\n  }\n\n  /**\n   * Parse a period formatted according to the ISO 8601 standard (see https://www.iso.org/fr/standard/70907.html).\n   *\n   * @param duration an ISO-formtted duration to be parsed.\n   * @returns the parsed `Duration`.\n   */\n  public static parse(duration: string): Duration {\n    const matches = duration.match(/^PT(?:(\\d+)D)?(?:(\\d+)H)?(?:(\\d+)M)?(?:(\\d+)S)?$/);\n    if (!matches) {\n      throw new Error(`Not a valid ISO duration: ${duration}`);\n    }\n    const [, days, hours, minutes, seconds] = matches;\n    if (!days && !hours && !minutes && !seconds) {\n      throw new Error(`Not a valid ISO duration: ${duration}`);\n    }\n    return Duration.seconds(\n      _toInt(seconds)\n      + (_toInt(minutes) * TimeUnit.Minutes.inSeconds)\n      + (_toInt(hours) * TimeUnit.Hours.inSeconds)\n      + (_toInt(days) * TimeUnit.Days.inSeconds)\n    );\n\n    function _toInt(str: string): number {\n      if (!str) { return 0; }\n      return Number(str);\n    }\n  }\n\n  private readonly amount: number;\n  private readonly unit: TimeUnit;\n\n  private constructor(amount: number, unit: TimeUnit) {\n    if (!Token.isUnresolved(amount) && amount < 0) {\n      throw new Error(`Duration amounts cannot be negative. Received: ${amount}`);\n    }\n\n    this.amount = amount;\n    this.unit = unit;\n  }\n\n  /**\n   * @returns the value of this `Duration` expressed in Seconds.\n   */\n  public toMilliseconds(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Milliseconds, opts);\n  }\n\n  /**\n   * @returns the value of this `Duration` expressed in Seconds.\n   */\n  public toSeconds(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Seconds, opts);\n  }\n\n  /**\n   * @returns the value of this `Duration` expressed in Minutes.\n   */\n  public toMinutes(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Minutes, opts);\n  }\n\n  /**\n   * @returns the value of this `Duration` expressed in Hours.\n   */\n  public toHours(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Hours, opts);\n  }\n\n  /**\n   * @returns the value of this `Duration` expressed in Days.\n   */\n  public toDays(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Days, opts);\n  }\n\n  /**\n   * @returns an ISO 8601 representation of this period (see https://www.iso.org/fr/standard/70907.html).\n   */\n  public toISOString(): string {\n    if (this.amount === 0) { return 'PT0S'; }\n    switch (this.unit) {\n      case TimeUnit.Seconds:\n        return `PT${this.fractionDuration('S', 60, Duration.minutes)}`;\n      case TimeUnit.Minutes:\n        return `PT${this.fractionDuration('M', 60, Duration.hours)}`;\n      case TimeUnit.Hours:\n        return `PT${this.fractionDuration('H', 24, Duration.days)}`;\n      case TimeUnit.Days:\n        return `PT${this.amount}D`;\n      default:\n        throw new Error(`Unexpected time unit: ${this.unit}`);\n    }\n  }\n\n  /**\n   * Returns a string representation of this `Duration` that is also a Token that cannot be successfully resolved. This\n   * protects users against inadvertently stringifying a `Duration` object, when they should have called one of the\n   * `to*` methods instead.\n   */\n  public toString(): string {\n    return Token.asString(\n      () => {\n        throw new Error(`Duration.toString() was used, but .toSeconds, .toMinutes or .toDays should have been called instead`);\n      },\n      { displayHint: `${this.amount} ${this.unit.label}` }\n    );\n  }\n\n  private fractionDuration(symbol: string, modulus: number, next: (amount: number) => Duration): string {\n    if (this.amount < modulus) {\n      return `${this.amount}${symbol}`;\n    }\n    const remainder = this.amount % modulus;\n    const quotient = next((this.amount - remainder) / modulus).toISOString().slice(2);\n    return remainder > 0\n      ? `${quotient}${remainder}${symbol}`\n      : quotient;\n  }\n}\n\n/**\n * Options for how to convert time to a different unit.\n */\nexport interface TimeConversionOptions {\n  /**\n   * If `true`, conversions into a larger time unit (e.g. `Seconds` to `Mintues`) will fail if the result is not an\n   * integer.\n   *\n   * @default true\n   */\n  readonly integral?: boolean;\n}\n\nclass TimeUnit {\n  public static readonly Milliseconds = new TimeUnit('millis', 0.001);\n  public static readonly Seconds = new TimeUnit('seconds', 1);\n  public static readonly Minutes = new TimeUnit('minutes', 60);\n  public static readonly Hours = new TimeUnit('hours', 3_600);\n  public static readonly Days = new TimeUnit('days', 86_400);\n\n  private constructor(public readonly label: string, public readonly inSeconds: number) {\n  }\n\n  public toString() {\n    return this.label;\n  }\n}\n\nfunction convert(amount: number, fromUnit: TimeUnit, toUnit: TimeUnit, { integral = true }: TimeConversionOptions) {\n  if (fromUnit.inSeconds === toUnit.inSeconds) { return amount; }\n  const multiplier = fromUnit.inSeconds / toUnit.inSeconds;\n\n  if (Token.isUnresolved(amount)) {\n    throw new Error(`Unable to perform time unit conversion on un-resolved token ${amount}.`);\n  }\n  const value = amount * multiplier;\n  if (!Number.isInteger(value) && integral) {\n    throw new Error(`'${amount} ${fromUnit}' cannot be converted into a whole number of ${toUnit}.`);\n  }\n  return value;\n}"]}