@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
273 lines • 32.1 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Duration = void 0;
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.
*
* When the amount is passed as a 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: ${amount}`);
}
this.amount = amount;
this.unit = unit;
}
/**
* Create a Duration representing an amount of milliseconds.
*
* @param amount the amount of Milliseconds the `Duration` will represent.
* @returns a new `Duration` representing `amount` ms.
*/
static millis(amount) {
return new Duration(amount, TimeUnit.Milliseconds);
}
/**
* Create a Duration representing an amount of seconds.
*
* @param amount the amount of Seconds the `Duration` will represent.
* @returns a new `Duration` representing `amount` Seconds.
*/
static seconds(amount) {
return new Duration(amount, TimeUnit.Seconds);
}
/**
* Create a Duration representing an amount of minutes.
*
* @param amount the amount of Minutes the `Duration` will represent.
* @returns a new `Duration` representing `amount` Minutes.
*/
static minutes(amount) {
return new Duration(amount, TimeUnit.Minutes);
}
/**
* Create a Duration representing an amount of hours.
*
* @param amount the amount of Hours the `Duration` will represent.
* @returns a new `Duration` representing `amount` Hours.
*/
static hours(amount) {
return new Duration(amount, TimeUnit.Hours);
}
/**
* Create a Duration representing an amount of days.
*
* @param amount the amount of Days the `Duration` will represent.
* @returns a new `Duration` representing `amount` Days.
*/
static days(amount) {
return new Duration(amount, TimeUnit.Days);
}
/**
* Parse a period formatted according to the ISO 8601 standard.
*
* @param duration an ISO-formtted duration to be parsed.
* @returns the parsed `Duration`.
* @see https://www.iso.org/fr/standard/70907.html
*/
static parse(duration) {
const matches = duration.match(/^P(?:(\d+)D)?(?:T(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?)?$/);
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.millis(_toInt(seconds) * TimeUnit.Seconds.inMillis
+ (_toInt(minutes) * TimeUnit.Minutes.inMillis)
+ (_toInt(hours) * TimeUnit.Hours.inMillis)
+ (_toInt(days) * TimeUnit.Days.inMillis));
function _toInt(str) {
if (!str) {
return 0;
}
return Number(str);
}
}
/**
* Add two Durations together.
*/
plus(rhs) {
const targetUnit = finestUnit(this.unit, rhs.unit);
const total = convert(this.amount, this.unit, targetUnit, {}) + convert(rhs.amount, rhs.unit, targetUnit, {});
return new Duration(total, targetUnit);
}
/**
* Return the total number of milliseconds in this Duration.
*
* @returns the value of this `Duration` expressed in Milliseconds.
*/
toMilliseconds(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Milliseconds, opts);
}
/**
* Return the total number of seconds in this Duration.
*
* @returns the value of this `Duration` expressed in Seconds.
*/
toSeconds(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Seconds, opts);
}
/**
* Return the total number of minutes in this Duration.
*
* @returns the value of this `Duration` expressed in Minutes.
*/
toMinutes(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Minutes, opts);
}
/**
* Return the total number of hours in this Duration.
*
* @returns the value of this `Duration` expressed in Hours.
*/
toHours(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Hours, opts);
}
/**
* Return the total number of days in this Duration.
*
* @returns the value of this `Duration` expressed in Days.
*/
toDays(opts = {}) {
return convert(this.amount, this.unit, TimeUnit.Days, opts);
}
/**
* Return an ISO 8601 representation of this period.
*
* @returns a string starting with 'P' describing the period
* @see https://www.iso.org/fr/standard/70907.html
*/
toIsoString() {
if (this.amount === 0) {
return 'PT0S';
}
const ret = ['P'];
let tee = false;
for (const [amount, unit] of this.components(true)) {
if ([TimeUnit.Seconds, TimeUnit.Minutes, TimeUnit.Hours].includes(unit) && !tee) {
ret.push('T');
tee = true;
}
ret.push(`${amount}${unit.isoLabel}`);
}
return ret.join('');
}
/**
* (deprecated) Return an ISO 8601 representation of this period.
*
* @returns a string starting with 'P' describing the period
* @see https://www.iso.org/fr/standard/70907.html
* @deprecated Use `toIsoString()` instead.
*/
toISOString() {
return this.toIsoString();
}
/**
* Turn this duration into a human-readable string.
*/
toHumanString() {
if (this.amount === 0) {
return fmtUnit(0, this.unit);
}
if (token_1.Token.isUnresolved(this.amount)) {
return `<token> ${this.unit.label}`;
}
return this.components(false)
// 2 significant parts, that's totally enough for humans
.slice(0, 2)
.map(([amount, unit]) => fmtUnit(amount, unit))
.join(' ');
function fmtUnit(amount, unit) {
if (amount === 1) {
// All of the labels end in 's'
return `${amount} ${unit.label.substring(0, unit.label.length - 1)}`;
}
return `${amount} ${unit.label}`;
}
}
/**
* Returns a string representation of this `Duration` that is also a Token that cannot be successfully resolved.
*
* This
* protects users against inadvertently stringifying a `Duration` object, when they should have called one of the
* `to*` methods instead.
*/
toString() {
return token_1.Token.asString(() => {
throw new Error('Duration.toString() was used, but .toSeconds, .toMinutes or .toDays should have been called instead');
}, { displayHint: `${this.amount} ${this.unit.label}` });
}
/**
* Return the duration in a set of whole numbered time components, ordered from largest to smallest
*
* Only components != 0 will be returned.
*
* Can combine millis and seconds together for the benefit of toIsoString,
* makes the logic in there simpler.
*/
components(combineMillisWithSeconds) {
const ret = new Array();
let millis = convert(this.amount, this.unit, TimeUnit.Milliseconds, { integral: false });
for (const unit of [TimeUnit.Days, TimeUnit.Hours, TimeUnit.Minutes, TimeUnit.Seconds]) {
const count = convert(millis, TimeUnit.Milliseconds, unit, { integral: false });
// Round down to a whole number UNLESS we're combining millis and seconds and we got to the seconds
const wholeCount = unit === TimeUnit.Seconds && combineMillisWithSeconds ? count : Math.floor(count);
if (wholeCount > 0) {
ret.push([wholeCount, unit]);
millis -= wholeCount * unit.inMillis;
}
}
// Remainder in millis
if (millis > 0) {
ret.push([millis, TimeUnit.Milliseconds]);
}
return ret;
}
}
exports.Duration = Duration;
class TimeUnit {
constructor(label, isoLabel, inMillis) {
this.label = label;
this.isoLabel = isoLabel;
this.inMillis = inMillis;
// MAX_SAFE_INTEGER is 2^53, so by representing our duration in millis (the lowest
// common unit) the highest duration we can represent is
// 2^53 / 86*10^6 ~= 104 * 10^6 days (about 100 million days).
}
toString() {
return this.label;
}
}
TimeUnit.Milliseconds = new TimeUnit('millis', '', 1);
TimeUnit.Seconds = new TimeUnit('seconds', 'S', 1000);
TimeUnit.Minutes = new TimeUnit('minutes', 'M', 60000);
TimeUnit.Hours = new TimeUnit('hours', 'H', 3600000);
TimeUnit.Days = new TimeUnit('days', 'D', 86400000);
function convert(amount, fromUnit, toUnit, { integral = true }) {
if (fromUnit.inMillis === toUnit.inMillis) {
return amount;
}
const multiplier = fromUnit.inMillis / toUnit.inMillis;
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;
}
/**
* Return the time unit with highest granularity
*/
function finestUnit(a, b) {
return a.inMillis < b.inMillis ? a : b;
}
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{ Token } from './token';\n\n                                                                                                                                                                                                                                                           \nexport class Duration {\n                                                                                                                                                                                                                    \n  public static millis(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Milliseconds);\n  }\n\n                                                                                                                                                                                                               \n  public static seconds(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Seconds);\n  }\n\n                                                                                                                                                                                                               \n  public static minutes(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Minutes);\n  }\n\n                                                                                                                                                                                                         \n  public static hours(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Hours);\n  }\n\n                                                                                                                                                                                                      \n  public static days(amount: number): Duration {\n    return new Duration(amount, TimeUnit.Days);\n  }\n\n                                                                                                                                                                                                                                       \n  public static parse(duration: string): Duration {\n    const matches = duration.match(/^P(?:(\\d+)D)?(?:T(?:(\\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.millis(\n      _toInt(seconds) * TimeUnit.Seconds.inMillis\n      + (_toInt(minutes) * TimeUnit.Minutes.inMillis)\n      + (_toInt(hours) * TimeUnit.Hours.inMillis)\n      + (_toInt(days) * TimeUnit.Days.inMillis),\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  public plus(rhs: Duration): Duration {\n    const targetUnit = finestUnit(this.unit, rhs.unit);\n    const total = convert(this.amount, this.unit, targetUnit, {}) + convert(rhs.amount, rhs.unit, targetUnit, {});\n    return new Duration(total, targetUnit);\n  }\n\n                                                                                                                                                    \n  public toMilliseconds(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Milliseconds, opts);\n  }\n\n                                                                                                                                          \n  public toSeconds(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Seconds, opts);\n  }\n\n                                                                                                                                          \n  public toMinutes(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Minutes, opts);\n  }\n\n                                                                                                                                      \n  public toHours(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Hours, opts);\n  }\n\n                                                                                                                                    \n  public toDays(opts: TimeConversionOptions = {}): number {\n    return convert(this.amount, this.unit, TimeUnit.Days, opts);\n  }\n\n                                                                                                                                                                                          \n  public toIsoString(): string {\n    if (this.amount === 0) { return 'PT0S'; }\n\n    const ret = ['P'];\n    let tee = false;\n\n    for (const [amount, unit] of this.components(true)) {\n      if ([TimeUnit.Seconds, TimeUnit.Minutes, TimeUnit.Hours].includes(unit) && !tee) {\n        ret.push('T');\n        tee = true;\n      }\n      ret.push(`${amount}${unit.isoLabel}`);\n    }\n\n    return ret.join('');\n  }\n\n                                                                                                                                                                                                                                        \n  public toISOString(): string {\n    return this.toIsoString();\n  }\n\n                                                                \n  public toHumanString(): string {\n    if (this.amount === 0) { return fmtUnit(0, this.unit); }\n    if (Token.isUnresolved(this.amount)) { return `<token> ${this.unit.label}`; }\n\n    return this.components(false)\n      // 2 significant parts, that's totally enough for humans\n      .slice(0, 2)\n      .map(([amount, unit]) => fmtUnit(amount, unit))\n      .join(' ');\n\n    function fmtUnit(amount: number, unit: TimeUnit) {\n      if (amount === 1) {\n        // All of the labels end in 's'\n        return `${amount} ${unit.label.substring(0, unit.label.length - 1)}`;\n      }\n      return `${amount} ${unit.label}`;\n    }\n  }\n\n                                                                                                                                                                                                                                                                                   \n  public toString(): string {\n    return Token.asString(\n      () => {\n        throw new Error('Duration.toString() was used, but .toSeconds, .toMinutes or .toDays should have been called instead');\n      },\n      { displayHint: `${this.amount} ${this.unit.label}` },\n    );\n  }\n\n  /**\n   * Return the duration in a set of whole numbered time components, ordered from largest to smallest\n   *\n   * Only components != 0 will be returned.\n   *\n   * Can combine millis and seconds together for the benefit of toIsoString,\n   * makes the logic in there simpler.\n   */\n  private components(combineMillisWithSeconds: boolean): Array<[number, TimeUnit]> {\n    const ret = new Array<[number, TimeUnit]>();\n    let millis = convert(this.amount, this.unit, TimeUnit.Milliseconds, { integral: false });\n\n    for (const unit of [TimeUnit.Days, TimeUnit.Hours, TimeUnit.Minutes, TimeUnit.Seconds]) {\n      const count = convert(millis, TimeUnit.Milliseconds, unit, { integral: false });\n      // Round down to a whole number UNLESS we're combining millis and seconds and we got to the seconds\n      const wholeCount = unit === TimeUnit.Seconds && combineMillisWithSeconds ? count : Math.floor(count);\n      if (wholeCount > 0) {\n        ret.push([wholeCount, unit]);\n        millis -= wholeCount * unit.inMillis;\n      }\n    }\n\n    // Remainder in millis\n    if (millis > 0) {\n      ret.push([millis, TimeUnit.Milliseconds]);\n    }\n    return ret;\n  }\n}\n\n                                                               \nexport interface TimeConversionOptions {\n                                                                                                                                                                     \n  readonly integral?: boolean;\n}\n\nclass TimeUnit {\n  public static readonly Milliseconds = new TimeUnit('millis', '', 1);\n  public static readonly Seconds = new TimeUnit('seconds', 'S', 1_000);\n  public static readonly Minutes = new TimeUnit('minutes', 'M', 60_000);\n  public static readonly Hours = new TimeUnit('hours', 'H', 3_600_000);\n  public static readonly Days = new TimeUnit('days', 'D', 86_400_000);\n\n  private constructor(public readonly label: string, public readonly isoLabel: string, public readonly inMillis: number) {\n    // MAX_SAFE_INTEGER is 2^53, so by representing our duration in millis (the lowest\n    // common unit) the highest duration we can represent is\n    // 2^53 / 86*10^6 ~= 104 * 10^6 days (about 100 million days).\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.inMillis === toUnit.inMillis) { return amount; }\n  const multiplier = fromUnit.inMillis / toUnit.inMillis;\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}\n\n/**\n * Return the time unit with highest granularity\n */\nfunction finestUnit(a: TimeUnit, b: TimeUnit) {\n  return a.inMillis < b.inMillis ? a : b;\n}\n"]}