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'use client'
import type { ReactNode } from 'react'
import {
useState,
createContext,
useContext,
use,
useMemo,
useCallback,
} from 'react'
import { useLayoutEffect } from 'react'
import { dispatcher } from 'next/dist/compiled/next-devtools'
import { notFound } from '../../../client/components/not-found'
export type SegmentBoundaryType =
| 'not-found'
| 'error'
| 'loading'
| 'global-error'
export const SEGMENT_EXPLORER_SIMULATED_ERROR_MESSAGE =
'NEXT_DEVTOOLS_SIMULATED_ERROR'
export type SegmentNodeState = {
type: string
pagePath: string
boundaryType: string | null
setBoundaryType: (type: SegmentBoundaryType | null) => void
}
function SegmentTrieNode({
type,
pagePath,
}: {
type: string
pagePath: string
}): React.ReactNode {
const { boundaryType, setBoundaryType } = useSegmentState()
const nodeState: SegmentNodeState = useMemo(() => {
return {
type,
pagePath,
boundaryType,
setBoundaryType,
}
}, [type, pagePath, boundaryType, setBoundaryType])
// Use `useLayoutEffect` to ensure the state is updated during suspense.
// `useEffect` won't work as the state is preserved during suspense.
useLayoutEffect(() => {
dispatcher.segmentExplorerNodeAdd(nodeState)
return () => {
dispatcher.segmentExplorerNodeRemove(nodeState)
}
}, [nodeState])
return null
}
function NotFoundSegmentNode(): React.ReactNode {
notFound()
}
function ErrorSegmentNode(): React.ReactNode {
throw new Error(SEGMENT_EXPLORER_SIMULATED_ERROR_MESSAGE)
}
const forever = new Promise(() => {})
function LoadingSegmentNode(): React.ReactNode {
use(forever)
return null
}
export function SegmentViewStateNode({ page }: { page: string }) {
useLayoutEffect(() => {
dispatcher.segmentExplorerUpdateRouteState(page)
return () => {
dispatcher.segmentExplorerUpdateRouteState('')
}
}, [page])
return null
}
export function SegmentBoundaryTriggerNode() {
const { boundaryType } = useSegmentState()
let segmentNode: React.ReactNode = null
if (boundaryType === 'loading') {
segmentNode = <LoadingSegmentNode />
} else if (boundaryType === 'not-found') {
segmentNode = <NotFoundSegmentNode />
} else if (boundaryType === 'error') {
segmentNode = <ErrorSegmentNode />
}
return segmentNode
}
export function SegmentViewNode({
type,
pagePath,
children,
}: {
type: string
pagePath: string
children?: ReactNode
}): React.ReactNode {
const segmentNode = (
<SegmentTrieNode key={type} type={type} pagePath={pagePath} />
)
return (
<>
{segmentNode}
{children}
</>
)
}
const SegmentStateContext = createContext<{
boundaryType: SegmentBoundaryType | null
setBoundaryType: (type: SegmentBoundaryType | null) => void
}>({
boundaryType: null,
setBoundaryType: () => {},
})
export function SegmentStateProvider({ children }: { children: ReactNode }) {
const [boundaryType, setBoundaryType] = useState<SegmentBoundaryType | null>(
null
)
const [errorBoundaryKey, setErrorBoundaryKey] = useState(0)
const reloadBoundary = useCallback(
() => setErrorBoundaryKey((prev) => prev + 1),
[]
)
const setBoundaryTypeAndReload = useCallback(
(type: SegmentBoundaryType | null) => {
if (type === null) {
reloadBoundary()
}
setBoundaryType(type)
},
[reloadBoundary]
)
return (
<SegmentStateContext.Provider
key={errorBoundaryKey}
value={{
boundaryType,
setBoundaryType: setBoundaryTypeAndReload,
}}
>
{children}
</SegmentStateContext.Provider>
)
}
export function useSegmentState() {
return useContext(SegmentStateContext)
}
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