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import type { JWTPayload } from '../types.d.ts'import epoch from '../lib/epoch.ts'import isObject from '../lib/is_object.ts'import secs from '../lib/secs.ts'
function validateInput(label: string, input: number) {  if (!Number.isFinite(input)) {    throw new TypeError(`Invalid ${label} input`)  }
  return input}
/** Generic class for JWT producing. */export class ProduceJWT {  protected _payload!: JWTPayload
  /** @param payload The JWT Claims Set object. Defaults to an empty object. */  constructor(payload: JWTPayload = {}) {    if (!isObject(payload)) {      throw new TypeError('JWT Claims Set MUST be an object')    }    this._payload = payload  }
  /**   * Set the "iss" (Issuer) Claim.   *   * @param issuer "Issuer" Claim value to set on the JWT Claims Set.   */  setIssuer(issuer: string) {    this._payload = { ...this._payload, iss: issuer }    return this  }
  /**   * Set the "sub" (Subject) Claim.   *   * @param subject "sub" (Subject) Claim value to set on the JWT Claims Set.   */  setSubject(subject: string) {    this._payload = { ...this._payload, sub: subject }    return this  }
  /**   * Set the "aud" (Audience) Claim.   *   * @param audience "aud" (Audience) Claim value to set on the JWT Claims Set.   */  setAudience(audience: string | string[]) {    this._payload = { ...this._payload, aud: audience }    return this  }
  /**   * Set the "jti" (JWT ID) Claim.   *   * @param jwtId "jti" (JWT ID) Claim value to set on the JWT Claims Set.   */  setJti(jwtId: string) {    this._payload = { ...this._payload, jti: jwtId }    return this  }
  /**   * Set the "nbf" (Not Before) Claim.   *   * - If a `number` is passed as an argument it is used as the claim directly.   * - If a `Date` instance is passed as an argument it is converted to unix timestamp and used as the   *   claim.   * - If a `string` is passed as an argument it is resolved to a time span, and then added to the   *   current unix timestamp and used as the claim.   *   * Format used for time span should be a number followed by a unit, such as "5 minutes" or "1   * day".   *   * Valid units are: "sec", "secs", "second", "seconds", "s", "minute", "minutes", "min", "mins",   * "m", "hour", "hours", "hr", "hrs", "h", "day", "days", "d", "week", "weeks", "w", "year",   * "years", "yr", "yrs", and "y". It is not possible to specify months. 365.25 days is used as an   * alias for a year.   *   * If the string is suffixed with "ago", or prefixed with a "-", the resulting time span gets   * subtracted from the current unix timestamp. A "from now" suffix can also be used for   * readability when adding to the current unix timestamp.   *   * @param input "nbf" (Not Before) Claim value to set on the JWT Claims Set.   */  setNotBefore(input: number | string | Date) {    if (typeof input === 'number') {      this._payload = { ...this._payload, nbf: validateInput('setNotBefore', input) }    } else if (input instanceof Date) {      this._payload = { ...this._payload, nbf: validateInput('setNotBefore', epoch(input)) }    } else {      this._payload = { ...this._payload, nbf: epoch(new Date()) + secs(input) }    }    return this  }
  /**   * Set the "exp" (Expiration Time) Claim.   *   * - If a `number` is passed as an argument it is used as the claim directly.   * - If a `Date` instance is passed as an argument it is converted to unix timestamp and used as the   *   claim.   * - If a `string` is passed as an argument it is resolved to a time span, and then added to the   *   current unix timestamp and used as the claim.   *   * Format used for time span should be a number followed by a unit, such as "5 minutes" or "1   * day".   *   * Valid units are: "sec", "secs", "second", "seconds", "s", "minute", "minutes", "min", "mins",   * "m", "hour", "hours", "hr", "hrs", "h", "day", "days", "d", "week", "weeks", "w", "year",   * "years", "yr", "yrs", and "y". It is not possible to specify months. 365.25 days is used as an   * alias for a year.   *   * If the string is suffixed with "ago", or prefixed with a "-", the resulting time span gets   * subtracted from the current unix timestamp. A "from now" suffix can also be used for   * readability when adding to the current unix timestamp.   *   * @param input "exp" (Expiration Time) Claim value to set on the JWT Claims Set.   */  setExpirationTime(input: number | string | Date) {    if (typeof input === 'number') {      this._payload = { ...this._payload, exp: validateInput('setExpirationTime', input) }    } else if (input instanceof Date) {      this._payload = { ...this._payload, exp: validateInput('setExpirationTime', epoch(input)) }    } else {      this._payload = { ...this._payload, exp: epoch(new Date()) + secs(input) }    }    return this  }
  /**   * Set the "iat" (Issued At) Claim.   *   * - If no argument is used the current unix timestamp is used as the claim.   * - If a `number` is passed as an argument it is used as the claim directly.   * - If a `Date` instance is passed as an argument it is converted to unix timestamp and used as the   *   claim.   * - If a `string` is passed as an argument it is resolved to a time span, and then added to the   *   current unix timestamp and used as the claim.   *   * Format used for time span should be a number followed by a unit, such as "5 minutes" or "1   * day".   *   * Valid units are: "sec", "secs", "second", "seconds", "s", "minute", "minutes", "min", "mins",   * "m", "hour", "hours", "hr", "hrs", "h", "day", "days", "d", "week", "weeks", "w", "year",   * "years", "yr", "yrs", and "y". It is not possible to specify months. 365.25 days is used as an   * alias for a year.   *   * If the string is suffixed with "ago", or prefixed with a "-", the resulting time span gets   * subtracted from the current unix timestamp. A "from now" suffix can also be used for   * readability when adding to the current unix timestamp.   *   * @param input "iat" (Expiration Time) Claim value to set on the JWT Claims Set.   */  setIssuedAt(input?: number | string | Date) {    if (typeof input === 'undefined') {      this._payload = { ...this._payload, iat: epoch(new Date()) }    } else if (input instanceof Date) {      this._payload = { ...this._payload, iat: validateInput('setIssuedAt', epoch(input)) }    } else if (typeof input === 'string') {      this._payload = {        ...this._payload,        iat: validateInput('setIssuedAt', epoch(new Date()) + secs(input)),      }    } else {      this._payload = { ...this._payload, iat: validateInput('setIssuedAt', input) }    }    return this  }}