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import { getSegmentParam } from '../../../server/app-render/get-segment-param'
import type { LoadComponentsReturnType } from '../../../server/load-components'
import type { AppPageModule } from '../../../server/route-modules/app-page/module'
import type AppPageRouteModule from '../../../server/route-modules/app-page/module'
import type { AppRouteModule } from '../../../server/route-modules/app-route/module'
import {
isAppPageRouteModule,
isAppRouteRouteModule,
} from '../../../server/route-modules/checks'
import { InvariantError } from '../../../shared/lib/invariant-error'
function collectAppPageRootParamKeys(
routeModule: AppPageRouteModule
): readonly string[] {
let rootParams: string[] = []
let current = routeModule.userland.loaderTree
while (current) {
const [name, parallelRoutes, modules] = current
// If this is a dynamic segment, then we collect the param.
const param = getSegmentParam(name)?.param
if (param) {
rootParams.push(param)
}
// If this has a layout module, then we've found the root layout because
// we return once we found the first layout.
if (typeof modules.layout !== 'undefined') {
return rootParams
}
// This didn't include a root layout, so we need to continue. We don't need
// to collect from other parallel routes because we can't have a parallel
// route above a root layout.
current = parallelRoutes.children
}
// If we didn't find a root layout, then we don't have any params.
return []
}
/**
* Collects the segments for a given route module.
*
* @param components the loaded components
* @returns the segments for the route module
*/
export function collectRootParamKeys({
routeModule,
}: LoadComponentsReturnType<
AppPageModule | AppRouteModule
>): readonly string[] {
if (isAppRouteRouteModule(routeModule)) {
return []
}
if (isAppPageRouteModule(routeModule)) {
return collectAppPageRootParamKeys(routeModule)
}
throw new InvariantError(
'Expected a route module to be one of app route or page'
)
}
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