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utils.ts
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utils.ts
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import { extname, normalize, relative, resolve } from 'pathe'
import { encodePath } from 'ufo'
import { NuxtPage } from '@nuxt/schema'
import { resolveFiles, useNuxt } from '@nuxt/kit'
import { genImport, genDynamicImport, genArrayFromRaw, genSafeVariableName } from 'knitwork'
import escapeRE from 'escape-string-regexp'
import { uniqueBy } from '../core/utils'
enum SegmentParserState {
initial,
static,
dynamic,
optional,
catchall,
}
enum SegmentTokenType {
static,
dynamic,
optional,
catchall,
}
interface SegmentToken {
type: SegmentTokenType
value: string
}
export async function resolvePagesRoutes (): Promise<NuxtPage[]> {
const nuxt = useNuxt()
const pagesDirs = nuxt.options._layers.map(
layer => resolve(layer.config.srcDir, layer.config.dir?.pages || 'pages')
)
const allRoutes = (await Promise.all(
pagesDirs.map(async (dir) => {
const files = await resolveFiles(dir, `**/*{${nuxt.options.extensions.join(',')}}`)
// Sort to make sure parent are listed first
files.sort()
return generateRoutesFromFiles(files, dir)
})
)).flat()
return uniqueBy(allRoutes, 'path')
}
export function generateRoutesFromFiles (files: string[], pagesDir: string): NuxtPage[] {
const routes: NuxtPage[] = []
for (const file of files) {
const segments = relative(pagesDir, file)
.replace(new RegExp(`${escapeRE(extname(file))}$`), '')
.split('/')
const route: NuxtPage = {
name: '',
path: '',
file,
children: []
}
// Array where routes should be added, useful when adding child routes
let parent = routes
for (let i = 0; i < segments.length; i++) {
const segment = segments[i]
const tokens = parseSegment(segment)
const segmentName = tokens.map(({ value }) => value).join('')
// ex: parent/[slug].vue -> parent-slug
route.name += (route.name && '-') + segmentName
// ex: parent.vue + parent/child.vue
const child = parent.find(parentRoute => parentRoute.name === route.name && !parentRoute.path.endsWith('(.*)*'))
if (child && child.children) {
parent = child.children
route.path = ''
} else if (segmentName === 'index' && !route.path) {
route.path += '/'
} else if (segmentName !== 'index') {
route.path += getRoutePath(tokens)
}
}
parent.push(route)
}
return prepareRoutes(routes)
}
function getRoutePath (tokens: SegmentToken[]): string {
return tokens.reduce((path, token) => {
return (
path +
(token.type === SegmentTokenType.optional
? `:${token.value}?`
: token.type === SegmentTokenType.dynamic
? `:${token.value}`
: token.type === SegmentTokenType.catchall
? `:${token.value}(.*)*`
: encodePath(token.value))
)
}, '/')
}
const PARAM_CHAR_RE = /[\w\d_.]/
function parseSegment (segment: string) {
let state: SegmentParserState = SegmentParserState.initial
let i = 0
let buffer = ''
const tokens: SegmentToken[] = []
function consumeBuffer () {
if (!buffer) {
return
}
if (state === SegmentParserState.initial) {
throw new Error('wrong state')
}
tokens.push({
type:
state === SegmentParserState.static
? SegmentTokenType.static
: state === SegmentParserState.dynamic
? SegmentTokenType.dynamic
: state === SegmentParserState.optional
? SegmentTokenType.optional
: SegmentTokenType.catchall,
value: buffer
})
buffer = ''
}
while (i < segment.length) {
const c = segment[i]
switch (state) {
case SegmentParserState.initial:
buffer = ''
if (c === '[') {
state = SegmentParserState.dynamic
} else {
i--
state = SegmentParserState.static
}
break
case SegmentParserState.static:
if (c === '[') {
consumeBuffer()
state = SegmentParserState.dynamic
} else {
buffer += c
}
break
case SegmentParserState.catchall:
case SegmentParserState.dynamic:
case SegmentParserState.optional:
if (buffer === '...') {
buffer = ''
state = SegmentParserState.catchall
}
if (c === '[' && state === SegmentParserState.dynamic) {
state = SegmentParserState.optional
}
if (c === ']' && (state !== SegmentParserState.optional || buffer[buffer.length - 1] === ']')) {
if (!buffer) {
throw new Error('Empty param')
} else {
consumeBuffer()
}
state = SegmentParserState.initial
} else if (PARAM_CHAR_RE.test(c)) {
buffer += c
} else {
// eslint-disable-next-line no-console
// console.debug(`[pages]Ignored character "${c}" while building param "${buffer}" from "segment"`)
}
break
}
i++
}
if (state === SegmentParserState.dynamic) {
throw new Error(`Unfinished param "${buffer}"`)
}
consumeBuffer()
return tokens
}
function prepareRoutes (routes: NuxtPage[], parent?: NuxtPage) {
for (const route of routes) {
// Remove -index
if (route.name) {
route.name = route.name.replace(/-index$/, '')
}
// Remove leading / if children route
if (parent && route.path.startsWith('/')) {
route.path = route.path.slice(1)
}
if (route.children?.length) {
route.children = prepareRoutes(route.children, route)
}
if (route.children?.find(childRoute => childRoute.path === '')) {
delete route.name
}
}
return routes
}
export function normalizeRoutes (routes: NuxtPage[], metaImports: Set<string> = new Set()): { imports: Set<string>, routes: string } {
return {
imports: metaImports,
routes: genArrayFromRaw(routes.map((route) => {
const file = normalize(route.file)
const metaImportName = genSafeVariableName(file) + 'Meta'
metaImports.add(genImport(`${file}?macro=true`, [{ name: 'default', as: metaImportName }]))
let aliasCode = `${metaImportName}?.alias || []`
if (Array.isArray(route.alias) && route.alias.length) {
aliasCode = `${JSON.stringify(route.alias)}.concat(${aliasCode})`
}
return {
...Object.fromEntries(Object.entries(route).map(([key, value]) => [key, JSON.stringify(value)])),
name: `${metaImportName}?.name ?? ${route.name ? JSON.stringify(route.name) : 'undefined'}`,
path: `${metaImportName}?.path ?? ${JSON.stringify(route.path)}`,
children: route.children ? normalizeRoutes(route.children, metaImports).routes : [],
meta: route.meta ? `{...(${metaImportName} || {}), ...${JSON.stringify(route.meta)}}` : metaImportName,
alias: aliasCode,
redirect: route.redirect ? JSON.stringify(route.redirect) : `${metaImportName}?.redirect || undefined`,
component: genDynamicImport(file, { interopDefault: true })
}
}))
}
}