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import type { PageExtensions } from '../../build/page-extensions-type'
import { normalizePathSep } from '../../shared/lib/page-path/normalize-path-sep'
import { normalizeAppPath } from '../../shared/lib/router/utils/app-paths'
import { isAppRouteRoute } from '../is-app-route-route'

export const STATIC_METADATA_IMAGES = {
  icon: {
    filename: 'icon',
    extensions: ['ico', 'jpg', 'jpeg', 'png', 'svg'],
  },
  apple: {
    filename: 'apple-icon',
    extensions: ['jpg', 'jpeg', 'png'],
  },
  favicon: {
    filename: 'favicon',
    extensions: ['ico'],
  },
  openGraph: {
    filename: 'opengraph-image',
    extensions: ['jpg', 'jpeg', 'png', 'gif'],
  },
  twitter: {
    filename: 'twitter-image',
    extensions: ['jpg', 'jpeg', 'png', 'gif'],
  },
} as const

// Match routes that are metadata routes, e.g. /sitemap.xml, /favicon.<ext>, /<icon>.<ext>, etc.
// TODO-METADATA: support more metadata routes with more extensions
export const DEFAULT_METADATA_ROUTE_EXTENSIONS = ['js', 'jsx', 'ts', 'tsx']

// Match the file extension with the dynamic multi-routes extensions
// e.g. ([xml, js], null) -> can match `/sitemap.xml/route`, `sitemap.js/route`
// e.g. ([png], [ts]) -> can match `/opengrapg-image.png`, `/opengraph-image.ts`
export const getExtensionRegexString = (
  staticExtensions: readonly string[],
  dynamicExtensions: readonly string[] | null
) => {
  // If there's no possible multi dynamic routes, will not match any <name>[].<ext> files
  if (!dynamicExtensions || dynamicExtensions.length === 0) {
    return `(\\.(?:${staticExtensions.join('|')}))`
  }
  return `(?:\\.(${staticExtensions.join('|')})|(\\.(${dynamicExtensions.join('|')})))`
}

/**
 * Determine if the file is a metadata route file entry
 * @param appDirRelativePath the relative file path to app/
 * @param pageExtensions the js extensions, such as ['js', 'jsx', 'ts', 'tsx']
 * @param strictlyMatchExtensions if it's true, match the file with page extension, otherwise match the file with default corresponding extension
 * @returns if the file is a metadata route file
 */
export function isMetadataRouteFile(
  appDirRelativePath: string,
  pageExtensions: PageExtensions,
  strictlyMatchExtensions: boolean
) {
  // End with the extension or optional to have the extension
  // When strictlyMatchExtensions is true, it's used for match file path;
  // When strictlyMatchExtensions, the dynamic extension is skipped but
  // static extension is kept, which is usually used for matching route path.
  const trailingMatcher = (strictlyMatchExtensions ? '' : '?') + '$'
  // Match the optional variants like /opengraph-image2, /icon-a102f4.png, etc.
  const variantsMatcher = '\\d?'
  // The -\w{6} is the suffix that normalized from group routes;
  const groupSuffix = strictlyMatchExtensions ? '' : '(-\\w{6})?'

  const suffixMatcher = `${variantsMatcher}${groupSuffix}`

  const metadataRouteFilesRegex = [
    new RegExp(
      `^[\\\\/]robots${getExtensionRegexString(
        pageExtensions.concat('txt'),
        null
      )}${trailingMatcher}`
    ),
    new RegExp(
      `^[\\\\/]manifest${getExtensionRegexString(
        pageExtensions.concat('webmanifest', 'json'),
        null
      )}${trailingMatcher}`
    ),
    new RegExp(`^[\\\\/]favicon\\.ico$`),
    new RegExp(
      `[\\\\/]sitemap${getExtensionRegexString(['xml'], pageExtensions)}${trailingMatcher}`
    ),
    new RegExp(
      `[\\\\/]${STATIC_METADATA_IMAGES.icon.filename}${suffixMatcher}${getExtensionRegexString(
        STATIC_METADATA_IMAGES.icon.extensions,
        pageExtensions
      )}${trailingMatcher}`
    ),
    new RegExp(
      `[\\\\/]${STATIC_METADATA_IMAGES.apple.filename}${suffixMatcher}${getExtensionRegexString(
        STATIC_METADATA_IMAGES.apple.extensions,
        pageExtensions
      )}${trailingMatcher}`
    ),
    new RegExp(
      `[\\\\/]${STATIC_METADATA_IMAGES.openGraph.filename}${suffixMatcher}${getExtensionRegexString(
        STATIC_METADATA_IMAGES.openGraph.extensions,
        pageExtensions
      )}${trailingMatcher}`
    ),
    new RegExp(
      `[\\\\/]${STATIC_METADATA_IMAGES.twitter.filename}${suffixMatcher}${getExtensionRegexString(
        STATIC_METADATA_IMAGES.twitter.extensions,
        pageExtensions
      )}${trailingMatcher}`
    ),
  ]

  const normalizedAppDirRelativePath = normalizePathSep(appDirRelativePath)
  const matched = metadataRouteFilesRegex.some((r) =>
    r.test(normalizedAppDirRelativePath)
  )

  return matched
}

// Check if the route is a static metadata route, with /route suffix
// e.g. /favicon.ico/route, /icon.png/route, etc.
// But skip the text routes like robots.txt since they might also be dynamic.
// Checking route path is not enough to determine if text routes is dynamic.
export function isStaticMetadataRoute(route: string) {
  // extract ext with regex
  const pathname = route.replace(/\/route$/, '')

  const matched =
    isAppRouteRoute(route) &&
    isMetadataRouteFile(pathname, [], true) &&
    // These routes can either be built by static or dynamic entrypoints,
    // so we assume they're dynamic
    pathname !== '/robots.txt' &&
    pathname !== '/manifest.webmanifest' &&
    !pathname.endsWith('/sitemap.xml')

  return matched
}

/**
 * Determine if a page or pathname is a metadata page.
 *
 * The input is a page or pathname, which can be with or without page suffix /foo/page or /foo.
 * But it will not contain the /route suffix.
 *
 * .e.g
 * /robots -> true
 * /sitemap -> true
 * /foo -> false
 */
export function isMetadataPage(page: string) {
  const matched = !isAppRouteRoute(page) && isMetadataRouteFile(page, [], false)

  return matched
}

/*
 * Determine if a Next.js route is a metadata route.
 * `route` will has a route suffix.
 *
 * e.g.
 * /app/robots/route -> true
 * /robots/route -> true
 * /sitemap/[__metadata_id__]/route -> true
 * /app/sitemap/page -> false
 * /icon-a102f4/route -> true
 */
export function isMetadataRoute(route: string): boolean {
  let page = normalizeAppPath(route)
    .replace(/^\/?app\//, '')
    // Remove the dynamic route id
    .replace('/[__metadata_id__]', '')
    // Remove the /route suffix
    .replace(/\/route$/, '')

  if (page[0] !== '/') page = '/' + page

  const matched = isAppRouteRoute(route) && isMetadataRouteFile(page, [], false)

  return matched
}

	import type { PageExtensions } from '../../build/page-extensions-type'
	import { normalizePathSep } from '../../shared/lib/page-path/normalize-path-sep'
	import { normalizeAppPath } from '../../shared/lib/router/utils/app-paths'
	import { isAppRouteRoute } from '../is-app-route-route'

	export const STATIC_METADATA_IMAGES = {
	icon: {
	filename: 'icon',
	extensions: ['ico', 'jpg', 'jpeg', 'png', 'svg'],
	},
	apple: {
	filename: 'apple-icon',
	extensions: ['jpg', 'jpeg', 'png'],
	},
	favicon: {
	filename: 'favicon',
	extensions: ['ico'],
	},
	openGraph: {
	filename: 'opengraph-image',
	extensions: ['jpg', 'jpeg', 'png', 'gif'],
	},
	twitter: {
	filename: 'twitter-image',
	extensions: ['jpg', 'jpeg', 'png', 'gif'],
	},
	} as const

	// Match routes that are metadata routes, e.g. /sitemap.xml, /favicon.<ext>, /<icon>.<ext>, etc.
	// TODO-METADATA: support more metadata routes with more extensions
	export const DEFAULT_METADATA_ROUTE_EXTENSIONS = ['js', 'jsx', 'ts', 'tsx']

	// Match the file extension with the dynamic multi-routes extensions
	// e.g. ([xml, js], null) -> can match `/sitemap.xml/route`, `sitemap.js/route`
	// e.g. ([png], [ts]) -> can match `/opengrapg-image.png`, `/opengraph-image.ts`
	export const getExtensionRegexString = (
	staticExtensions: readonly string[],
	dynamicExtensions: readonly string[] \| null
	) => {
	// If there's no possible multi dynamic routes, will not match any <name>[].<ext> files
	if (!dynamicExtensions \|\| dynamicExtensions.length === 0) {
	return `(\\.(?:${staticExtensions.join('\|')}))`
	}
	return `(?:\\.(${staticExtensions.join('\|')})\|(\\.(${dynamicExtensions.join('\|')})))`
	}

	/**
	* Determine if the file is a metadata route file entry
	* @param appDirRelativePath the relative file path to app/
	* @param pageExtensions the js extensions, such as ['js', 'jsx', 'ts', 'tsx']
	* @param strictlyMatchExtensions if it's true, match the file with page extension, otherwise match the file with default corresponding extension
	* @returns if the file is a metadata route file
	*/
	export function isMetadataRouteFile(
	appDirRelativePath: string,
	pageExtensions: PageExtensions,
	strictlyMatchExtensions: boolean
	) {
	// End with the extension or optional to have the extension
	// When strictlyMatchExtensions is true, it's used for match file path;
	// When strictlyMatchExtensions, the dynamic extension is skipped but
	// static extension is kept, which is usually used for matching route path.
	const trailingMatcher = (strictlyMatchExtensions ? '' : '?') + '$'
	// Match the optional variants like /opengraph-image2, /icon-a102f4.png, etc.
	const variantsMatcher = '\\d?'
	// The -\w{6} is the suffix that normalized from group routes;
	const groupSuffix = strictlyMatchExtensions ? '' : '(-\\w{6})?'

	const suffixMatcher = `${variantsMatcher}${groupSuffix}`

	const metadataRouteFilesRegex = [
	new RegExp(
	`^[\\\\/]robots${getExtensionRegexString(
	pageExtensions.concat('txt'),
	null
	)}${trailingMatcher}`
	),
	new RegExp(
	`^[\\\\/]manifest${getExtensionRegexString(
	pageExtensions.concat('webmanifest', 'json'),
	null
	)}${trailingMatcher}`
	),
	new RegExp(`^[\\\\/]favicon\\.ico$`),
	new RegExp(
	`[\\\\/]sitemap${getExtensionRegexString(['xml'], pageExtensions)}${trailingMatcher}`
	),
	new RegExp(
	`[\\\\/]${STATIC_METADATA_IMAGES.icon.filename}${suffixMatcher}${getExtensionRegexString(
	STATIC_METADATA_IMAGES.icon.extensions,
	pageExtensions
	)}${trailingMatcher}`
	),
	new RegExp(
	`[\\\\/]${STATIC_METADATA_IMAGES.apple.filename}${suffixMatcher}${getExtensionRegexString(
	STATIC_METADATA_IMAGES.apple.extensions,
	pageExtensions
	)}${trailingMatcher}`
	),
	new RegExp(
	`[\\\\/]${STATIC_METADATA_IMAGES.openGraph.filename}${suffixMatcher}${getExtensionRegexString(
	STATIC_METADATA_IMAGES.openGraph.extensions,
	pageExtensions
	)}${trailingMatcher}`
	),
	new RegExp(
	`[\\\\/]${STATIC_METADATA_IMAGES.twitter.filename}${suffixMatcher}${getExtensionRegexString(
	STATIC_METADATA_IMAGES.twitter.extensions,
	pageExtensions
	)}${trailingMatcher}`
	),
	]

	const normalizedAppDirRelativePath = normalizePathSep(appDirRelativePath)
	const matched = metadataRouteFilesRegex.some((r) =>
	r.test(normalizedAppDirRelativePath)
	)

	return matched
	}

	// Check if the route is a static metadata route, with /route suffix
	// e.g. /favicon.ico/route, /icon.png/route, etc.
	// But skip the text routes like robots.txt since they might also be dynamic.
	// Checking route path is not enough to determine if text routes is dynamic.
	export function isStaticMetadataRoute(route: string) {
	// extract ext with regex
	const pathname = route.replace(/\/route$/, '')

	const matched =
	isAppRouteRoute(route) &&
	isMetadataRouteFile(pathname, [], true) &&
	// These routes can either be built by static or dynamic entrypoints,
	// so we assume they're dynamic
	pathname !== '/robots.txt' &&
	pathname !== '/manifest.webmanifest' &&
	!pathname.endsWith('/sitemap.xml')

	return matched
	}

	/**
	* Determine if a page or pathname is a metadata page.
	*
	* The input is a page or pathname, which can be with or without page suffix /foo/page or /foo.
	* But it will not contain the /route suffix.
	*
	* .e.g
	* /robots -> true
	* /sitemap -> true
	* /foo -> false
	*/
	export function isMetadataPage(page: string) {
	const matched = !isAppRouteRoute(page) && isMetadataRouteFile(page, [], false)

	return matched
	}

	/*
	* Determine if a Next.js route is a metadata route.
	* `route` will has a route suffix.
	*
	* e.g.
	* /app/robots/route -> true
	* /robots/route -> true
	* /sitemap/[__metadata_id__]/route -> true
	* /app/sitemap/page -> false
	* /icon-a102f4/route -> true
	*/
	export function isMetadataRoute(route: string): boolean {
	let page = normalizeAppPath(route)
	.replace(/^\/?app\//, '')
	// Remove the dynamic route id
	.replace('/[__metadata_id__]', '')
	// Remove the /route suffix
	.replace(/\/route$/, '')

	if (page[0] !== '/') page = '/' + page

	const matched = isAppRouteRoute(route) && isMetadataRouteFile(page, [], false)

	return matched
	}