62 lines
2 KiB
TypeScript
62 lines
2 KiB
TypeScript
import { fileExists } from '../../lib/file-exists'
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import { getPagePaths } from '../../shared/lib/page-path/get-page-paths'
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import { nonNullable } from '../../lib/non-nullable'
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import { join, sep, normalize } from 'path'
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import { promises } from 'fs'
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import { warn } from '../../build/output/log'
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import chalk from '../../lib/chalk'
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/**
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* Finds a page file with the given parameters. If the page is duplicated with
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* multiple extensions it will throw, otherwise it will return the *relative*
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* path to the page file or null if it is not found.
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*
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* @param pagesDir Absolute path to the pages folder with trailing `/pages`.
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* @param normalizedPagePath The page normalized (it will be denormalized).
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* @param pageExtensions Array of page extensions.
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*/
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export async function findPageFile(
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pagesDir: string,
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normalizedPagePath: string,
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pageExtensions: string[]
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): Promise<string | null> {
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const pagePaths = getPagePaths(normalizedPagePath, pageExtensions)
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const [existingPath, ...others] = (
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await Promise.all(
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pagePaths.map(async (path) =>
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(await fileExists(join(pagesDir, path))) ? path : null
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)
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)
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).filter(nonNullable)
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if (!existingPath) {
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return null
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}
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if (!(await isTrueCasePagePath(existingPath, pagesDir))) {
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return null
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}
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if (others.length > 0) {
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warn(
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`Duplicate page detected. ${chalk.cyan(
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join('pages', existingPath)
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)} and ${chalk.cyan(
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join('pages', others[0])
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)} both resolve to ${chalk.cyan(normalizedPagePath)}.`
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)
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}
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return existingPath
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}
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async function isTrueCasePagePath(pagePath: string, pagesDir: string) {
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const pageSegments = normalize(pagePath).split(sep).filter(Boolean)
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const segmentExistsPromises = pageSegments.map(async (segment, i) => {
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const segmentParentDir = join(pagesDir, ...pageSegments.slice(0, i))
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const parentDirEntries = await promises.readdir(segmentParentDir)
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return parentDirEntries.includes(segment)
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})
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return (await Promise.all(segmentExistsPromises)).every(Boolean)
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}
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