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import type { IncomingMessage } from 'http'
import type { ReadonlyRequestCookies } from '../web/spec-extension/adapters/request-cookies'
import type { ResponseCookies } from '../web/spec-extension/cookies'
import type { BaseNextRequest } from '../base-http'
import type { NextRequest } from '../web/spec-extension/request'

import {
  COOKIE_NAME_PRERENDER_BYPASS,
  checkIsOnDemandRevalidate,
} from '../api-utils'
import type { __ApiPreviewProps } from '../api-utils'

export class DraftModeProvider {
  /**
   * @internal - this declaration is stripped via `tsc --stripInternal`
   */
  private _isEnabled: boolean

  /**
   * @internal - this declaration is stripped via `tsc --stripInternal`
   */
  private readonly _previewModeId: string | undefined

  /**
   * @internal - this declaration is stripped via `tsc --stripInternal`
   */
  private readonly _mutableCookies: ResponseCookies

  constructor(
    previewProps: __ApiPreviewProps | undefined,
    req: IncomingMessage | BaseNextRequest<unknown> | NextRequest,
    cookies: ReadonlyRequestCookies,
    mutableCookies: ResponseCookies
  ) {
    // The logic for draftMode() is very similar to tryGetPreviewData()
    // but Draft Mode does not have any data associated with it.
    const isOnDemandRevalidate =
      previewProps &&
      checkIsOnDemandRevalidate(req, previewProps).isOnDemandRevalidate

    const cookieValue = cookies.get(COOKIE_NAME_PRERENDER_BYPASS)?.value

    this._isEnabled = Boolean(
      !isOnDemandRevalidate &&
        cookieValue &&
        previewProps &&
        (cookieValue === previewProps.previewModeId ||
          // In dev mode, the cookie can be actual hash value preview id but the preview props can still be `development-id`.
          (process.env.NODE_ENV !== 'production' &&
            previewProps.previewModeId === 'development-id'))
    )

    this._previewModeId = previewProps?.previewModeId
    this._mutableCookies = mutableCookies
  }

  get isEnabled() {
    return this._isEnabled
  }

  enable() {
    if (!this._previewModeId) {
      throw new Error(
        'Invariant: previewProps missing previewModeId this should never happen'
      )
    }

    this._mutableCookies.set({
      name: COOKIE_NAME_PRERENDER_BYPASS,
      value: this._previewModeId,
      httpOnly: true,
      sameSite: process.env.NODE_ENV !== 'development' ? 'none' : 'lax',
      secure: process.env.NODE_ENV !== 'development',
      path: '/',
    })

    this._isEnabled = true
  }

  disable() {
    // To delete a cookie, set `expires` to a date in the past:
    // https://tools.ietf.org/html/rfc6265#section-4.1.1
    // `Max-Age: 0` is not valid, thus ignored, and the cookie is persisted.
    this._mutableCookies.set({
      name: COOKIE_NAME_PRERENDER_BYPASS,
      value: '',
      httpOnly: true,
      sameSite: process.env.NODE_ENV !== 'development' ? 'none' : 'lax',
      secure: process.env.NODE_ENV !== 'development',
      path: '/',
      expires: new Date(0),
    })

    this._isEnabled = false
  }
}

	import type { IncomingMessage } from 'http'
	import type { ReadonlyRequestCookies } from '../web/spec-extension/adapters/request-cookies'
	import type { ResponseCookies } from '../web/spec-extension/cookies'
	import type { BaseNextRequest } from '../base-http'
	import type { NextRequest } from '../web/spec-extension/request'

	import {
	COOKIE_NAME_PRERENDER_BYPASS,
	checkIsOnDemandRevalidate,
	} from '../api-utils'
	import type { __ApiPreviewProps } from '../api-utils'

	export class DraftModeProvider {
	/**
	* @internal - this declaration is stripped via `tsc --stripInternal`
	*/
	private _isEnabled: boolean

	/**
	* @internal - this declaration is stripped via `tsc --stripInternal`
	*/
	private readonly _previewModeId: string \| undefined

	/**
	* @internal - this declaration is stripped via `tsc --stripInternal`
	*/
	private readonly _mutableCookies: ResponseCookies

	constructor(
	previewProps: __ApiPreviewProps \| undefined,
	req: IncomingMessage \| BaseNextRequest<unknown> \| NextRequest,
	cookies: ReadonlyRequestCookies,
	mutableCookies: ResponseCookies
	) {
	// The logic for draftMode() is very similar to tryGetPreviewData()
	// but Draft Mode does not have any data associated with it.
	const isOnDemandRevalidate =
	previewProps &&
	checkIsOnDemandRevalidate(req, previewProps).isOnDemandRevalidate

	const cookieValue = cookies.get(COOKIE_NAME_PRERENDER_BYPASS)?.value

	this._isEnabled = Boolean(
	!isOnDemandRevalidate &&
	cookieValue &&
	previewProps &&
	(cookieValue === previewProps.previewModeId \|\|
	// In dev mode, the cookie can be actual hash value preview id but the preview props can still be `development-id`.
	(process.env.NODE_ENV !== 'production' &&
	previewProps.previewModeId === 'development-id'))
	)

	this._previewModeId = previewProps?.previewModeId
	this._mutableCookies = mutableCookies
	}

	get isEnabled() {
	return this._isEnabled
	}

	enable() {
	if (!this._previewModeId) {
	throw new Error(
	'Invariant: previewProps missing previewModeId this should never happen'
	)
	}

	this._mutableCookies.set({
	name: COOKIE_NAME_PRERENDER_BYPASS,
	value: this._previewModeId,
	httpOnly: true,
	sameSite: process.env.NODE_ENV !== 'development' ? 'none' : 'lax',
	secure: process.env.NODE_ENV !== 'development',
	path: '/',
	})

	this._isEnabled = true
	}

	disable() {
	// To delete a cookie, set `expires` to a date in the past:
	// https://tools.ietf.org/html/rfc6265#section-4.1.1
	// `Max-Age: 0` is not valid, thus ignored, and the cookie is persisted.
	this._mutableCookies.set({
	name: COOKIE_NAME_PRERENDER_BYPASS,
	value: '',
	httpOnly: true,
	sameSite: process.env.NODE_ENV !== 'development' ? 'none' : 'lax',
	secure: process.env.NODE_ENV !== 'development',
	path: '/',
	expires: new Date(0),
	})

	this._isEnabled = false
	}
	}