forked from vuejs/router
/
navigationGuards.ts
398 lines (370 loc) · 13.4 KB
/
navigationGuards.ts
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import {
NavigationGuard,
RouteLocationNormalized,
NavigationGuardNext,
RouteLocationRaw,
RouteLocationNormalizedLoaded,
NavigationGuardNextCallback,
isRouteLocation,
Lazy,
RouteComponent,
RawRouteComponent,
} from './types'
import {
createRouterError,
ErrorTypes,
NavigationFailure,
NavigationRedirectError,
} from './errors'
import { ComponentOptions, onUnmounted, onActivated, onDeactivated } from 'vue'
import { inject, getCurrentInstance } from 'vue'
import { matchedRouteKey } from './injectionSymbols'
import { RouteRecordNormalized } from './matcher/types'
import { isESModule } from './utils'
import { warn } from './warning'
function registerGuard(
record: RouteRecordNormalized,
name: 'leaveGuards' | 'updateGuards',
guard: NavigationGuard
) {
const removeFromList = () => {
record[name].delete(guard)
}
onUnmounted(removeFromList)
onDeactivated(removeFromList)
onActivated(() => {
record[name].add(guard)
})
record[name].add(guard)
}
/**
* Add a navigation guard that triggers whenever the component for the current
* location is about to be left. Similar to {@link beforeRouteLeave} but can be
* used in any component. The guard is removed when the component is unmounted.
*
* @param leaveGuard - {@link NavigationGuard}
*/
export function onBeforeRouteLeave(leaveGuard: NavigationGuard) {
if (__DEV__ && !getCurrentInstance()) {
warn(
'getCurrentInstance() returned null. onBeforeRouteLeave() must be called at the top of a setup function'
)
return
}
const activeRecord: RouteRecordNormalized | undefined = inject(
matchedRouteKey,
// to avoid warning
{} as any
).value
if (!activeRecord) {
__DEV__ &&
warn(
'No active route record was found when calling `onBeforeRouteLeave()`. Make sure you call this function inside of a component child of <router-view>. Maybe you called it inside of App.vue?'
)
return
}
registerGuard(activeRecord, 'leaveGuards', leaveGuard)
}
/**
* Add a navigation guard that triggers whenever the current location is about
* to be updated. Similar to {@link beforeRouteUpdate} but can be used in any
* component. The guard is removed when the component is unmounted.
*
* @param updateGuard - {@link NavigationGuard}
*/
export function onBeforeRouteUpdate(updateGuard: NavigationGuard) {
if (__DEV__ && !getCurrentInstance()) {
warn(
'getCurrentInstance() returned null. onBeforeRouteUpdate() must be called at the top of a setup function'
)
return
}
const activeRecord: RouteRecordNormalized | undefined = inject(
matchedRouteKey,
// to avoid warning
{} as any
).value
if (!activeRecord) {
__DEV__ &&
warn(
'No active route record was found when calling `onBeforeRouteUpdate()`. Make sure you call this function inside of a component child of <router-view>. Maybe you called it inside of App.vue?'
)
return
}
registerGuard(activeRecord, 'updateGuards', updateGuard)
}
export function guardToPromiseFn(
guard: NavigationGuard,
to: RouteLocationNormalized,
from: RouteLocationNormalizedLoaded
): () => Promise<void>
export function guardToPromiseFn(
guard: NavigationGuard,
to: RouteLocationNormalized,
from: RouteLocationNormalizedLoaded,
record: RouteRecordNormalized,
name: string
): () => Promise<void>
export function guardToPromiseFn(
guard: NavigationGuard,
to: RouteLocationNormalized,
from: RouteLocationNormalizedLoaded,
record?: RouteRecordNormalized,
name?: string
): () => Promise<void> {
// keep a reference to the enterCallbackArray to prevent pushing callbacks if a new navigation took place
const enterCallbackArray =
record &&
// name is defined if record is because of the function overload
(record.enterCallbacks[name!] = record.enterCallbacks[name!] || [])
return () =>
new Promise((resolve, reject) => {
const next: NavigationGuardNext = (
valid?: boolean | RouteLocationRaw | NavigationGuardNextCallback | Error
) => {
if (valid === false) {
reject(
createRouterError<NavigationFailure>(
ErrorTypes.NAVIGATION_ABORTED,
{
from,
to,
}
)
)
} else if (valid instanceof Error) {
reject(valid)
} else if (isRouteLocation(valid)) {
reject(
createRouterError<NavigationRedirectError>(
ErrorTypes.NAVIGATION_GUARD_REDIRECT,
{
from: to,
to: valid,
}
)
)
} else {
if (
enterCallbackArray &&
// since enterCallbackArray is truthy, both record and name also are
record!.enterCallbacks[name!] === enterCallbackArray &&
typeof valid === 'function'
) {
enterCallbackArray.push(valid)
}
resolve()
}
}
// wrapping with Promise.resolve allows it to work with both async and sync guards
const guardReturn = guard.call(
record && record.instances[name!],
to,
from,
__DEV__ ? canOnlyBeCalledOnce(next, to, from) : next
)
let guardCall = Promise.resolve(guardReturn)
if (guard.length < 3) guardCall = guardCall.then(next)
if (__DEV__ && guard.length > 2) {
const message = `The "next" callback was never called inside of ${
guard.name ? '"' + guard.name + '"' : ''
}:\n${guard.toString()}\n. If you are returning a value instead of calling "next", make sure to remove the "next" parameter from your function.`
if (typeof guardReturn === 'object' && 'then' in guardReturn) {
guardCall = guardCall.then(resolvedValue => {
// @ts-expect-error: _called is added at canOnlyBeCalledOnce
if (!next._called) {
warn(message)
return Promise.reject(new Error('Invalid navigation guard'))
}
return resolvedValue
})
} else if (guardReturn !== undefined) {
// @ts-expect-error: _called is added at canOnlyBeCalledOnce
if (!next._called) {
warn(message)
reject(new Error('Invalid navigation guard'))
return
}
}
}
guardCall.catch(err => reject(err))
})
}
function canOnlyBeCalledOnce(
next: NavigationGuardNext,
to: RouteLocationNormalized,
from: RouteLocationNormalized
): NavigationGuardNext {
let called = 0
return function () {
if (called++ === 1)
warn(
`The "next" callback was called more than once in one navigation guard when going from "${from.fullPath}" to "${to.fullPath}". It should be called exactly one time in each navigation guard. This will fail in production.`
)
// @ts-expect-error: we put it in the original one because it's easier to check
next._called = true
if (called === 1) next.apply(null, arguments as any)
}
}
type GuardType = 'beforeRouteEnter' | 'beforeRouteUpdate' | 'beforeRouteLeave'
export function extractComponentsGuards(
matched: RouteRecordNormalized[],
guardType: GuardType,
to: RouteLocationNormalized,
from: RouteLocationNormalizedLoaded
) {
const guards: Array<() => Promise<void>> = []
for (const record of matched) {
if (__DEV__ && !record.components && !record.children.length) {
warn(
`Record with path "${record.path}" is either missing a "component(s)"` +
` or "children" property.`
)
}
for (const name in record.components) {
let rawComponent = record.components[name]
if (__DEV__) {
if (
!rawComponent ||
(typeof rawComponent !== 'object' &&
typeof rawComponent !== 'function')
) {
warn(
`Component "${name}" in record with path "${record.path}" is not` +
` a valid component. Received "${String(rawComponent)}".`
)
// throw to ensure we stop here but warn to ensure the message isn't
// missed by the user
throw new Error('Invalid route component')
} else if ('then' in rawComponent) {
// warn if user wrote import('/component.vue') instead of () =>
// import('./component.vue')
warn(
`Component "${name}" in record with path "${record.path}" is a ` +
`Promise instead of a function that returns a Promise. Did you ` +
`write "import('./MyPage.vue')" instead of ` +
`"() => import('./MyPage.vue')" ? This will break in ` +
`production if not fixed.`
)
const promise = rawComponent
rawComponent = () => promise
} else if (
(rawComponent as any).__asyncLoader &&
// warn only once per component
!(rawComponent as any).__warnedDefineAsync
) {
;(rawComponent as any).__warnedDefineAsync = true
warn(
`Component "${name}" in record with path "${record.path}" is defined ` +
`using "defineAsyncComponent()". ` +
`Write "() => import('./MyPage.vue')" instead of ` +
`"defineAsyncComponent(() => import('./MyPage.vue'))".`
)
}
}
// skip update and leave guards if the route component is not mounted
if (guardType !== 'beforeRouteEnter' && !record.instances[name]) continue
if (isRouteComponent(rawComponent)) {
// __vccOpts is added by vue-class-component and contain the regular options
const options: ComponentOptions =
(rawComponent as any).__vccOpts || rawComponent
const guard = options[guardType]
guard && guards.push(guardToPromiseFn(guard, to, from, record, name))
} else {
// start requesting the chunk already
let componentPromise: Promise<
RouteComponent | null | undefined | void
> = (rawComponent as Lazy<RouteComponent>)()
if (__DEV__ && !('catch' in componentPromise)) {
warn(
`Component "${name}" in record with path "${record.path}" is a function that does not return a Promise. If you were passing a functional component, make sure to add a "displayName" to the component. This will break in production if not fixed.`
)
componentPromise = Promise.resolve(componentPromise as RouteComponent)
}
guards.push(() =>
componentPromise.then(resolved => {
if (!resolved)
return Promise.reject(
new Error(
`Couldn't resolve component "${name}" at "${record.path}"`
)
)
const resolvedComponent = isESModule(resolved)
? resolved.default
: resolved
// replace the function with the resolved component
// cannot be null or undefined because we went into the for loop
record.components![name] = resolvedComponent
// __vccOpts is added by vue-class-component and contain the regular options
const options: ComponentOptions =
(resolvedComponent as any).__vccOpts || resolvedComponent
const guard = options[guardType]
return guard && guardToPromiseFn(guard, to, from, record, name)()
})
)
}
}
}
return guards
}
/**
* Allows differentiating lazy components from functional components and vue-class-component
* @internal
*
* @param component
*/
export function isRouteComponent(
component: RawRouteComponent
): component is RouteComponent {
return (
typeof component === 'object' ||
'displayName' in component ||
'props' in component ||
'__vccOpts' in component
)
}
/**
* Ensures a route is loaded so it can be passed as o prop to `<RouterView>`.
*
* @param route - resolved route to load
*/
export function loadRouteLocation(
route: RouteLocationNormalized
): Promise<RouteLocationNormalizedLoaded> {
return route.matched.every(record => record.redirect)
? Promise.reject(new Error('Cannot load a route that redirects.'))
: Promise.all(
route.matched.map(
record =>
record.components &&
Promise.all(
Object.keys(record.components).reduce((promises, name) => {
const rawComponent = record.components![name]
if (
typeof rawComponent === 'function' &&
!('displayName' in rawComponent)
) {
promises.push(
(rawComponent as Lazy<RouteComponent>)().then(resolved => {
if (!resolved)
return Promise.reject(
new Error(
`Couldn't resolve component "${name}" at "${record.path}". Ensure you passed a function that returns a promise.`
)
)
const resolvedComponent = isESModule(resolved)
? resolved.default
: resolved
// replace the function with the resolved component
// cannot be null or undefined because we went into the for loop
record.components![name] = resolvedComponent
return
})
)
}
return promises
}, [] as Array<Promise<RouteComponent | null | undefined>>)
)
)
).then(() => route as RouteLocationNormalizedLoaded)
}