/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { ɵRuntimeError as RuntimeError } from '@angular/core';
import { from, Observable, of } from 'rxjs';
import { catchError, concatMap, defaultIfEmpty, first, last as rxjsLast, map, scan, switchMap, takeWhile } from 'rxjs/operators';
import { ActivatedRouteSnapshot, inheritedParamsDataResolve, RouterStateSnapshot } from './router_state';
import { PRIMARY_OUTLET } from './shared';
import { last } from './utils/collection';
import { getOutlet, sortByMatchingOutlets } from './utils/config';
import { isImmediateMatch, matchWithChecks, noLeftoversInUrl, split } from './utils/config_matching';
import { TreeNode } from './utils/tree';
import { isEmptyError } from './utils/type_guards';
const NG_DEV_MODE = typeof ngDevMode === 'undefined' || !!ngDevMode;
class NoMatch {
}
function newObservableError(e) {
    // TODO(atscott): This pattern is used throughout the router code and can be `throwError` instead.
    return new Observable((obs) => obs.error(e));
}
export function recognize(injector, rootComponentType, config, urlTree, url, urlSerializer, paramsInheritanceStrategy = 'emptyOnly', relativeLinkResolution = 'legacy') {
    return new Recognizer(injector, rootComponentType, config, urlTree, url, paramsInheritanceStrategy, relativeLinkResolution, urlSerializer)
        .recognize()
        .pipe(switchMap(result => {
        if (result === null) {
            return newObservableError(new NoMatch());
        }
        else {
            return of(result);
        }
    }));
}
export class Recognizer {
    constructor(injector, rootComponentType, config, urlTree, url, paramsInheritanceStrategy, relativeLinkResolution, urlSerializer) {
        this.injector = injector;
        this.rootComponentType = rootComponentType;
        this.config = config;
        this.urlTree = urlTree;
        this.url = url;
        this.paramsInheritanceStrategy = paramsInheritanceStrategy;
        this.relativeLinkResolution = relativeLinkResolution;
        this.urlSerializer = urlSerializer;
    }
    recognize() {
        const rootSegmentGroup = split(this.urlTree.root, [], [], this.config.filter(c => c.redirectTo === undefined), this.relativeLinkResolution)
            .segmentGroup;
        return this.processSegmentGroup(this.injector, this.config, rootSegmentGroup, PRIMARY_OUTLET)
            .pipe(map(children => {
            if (children === null) {
                return null;
            }
            // Use Object.freeze to prevent readers of the Router state from modifying it outside of a
            // navigation, resulting in the router being out of sync with the browser.
            const root = new ActivatedRouteSnapshot([], Object.freeze({}), Object.freeze({ ...this.urlTree.queryParams }), this.urlTree.fragment, {}, PRIMARY_OUTLET, this.rootComponentType, null, this.urlTree.root, -1, {});
            const rootNode = new TreeNode(root, children);
            const routeState = new RouterStateSnapshot(this.url, rootNode);
            this.inheritParamsAndData(routeState._root);
            return routeState;
        }));
    }
    inheritParamsAndData(routeNode) {
        const route = routeNode.value;
        const i = inheritedParamsDataResolve(route, this.paramsInheritanceStrategy);
        route.params = Object.freeze(i.params);
        route.data = Object.freeze(i.data);
        routeNode.children.forEach(n => this.inheritParamsAndData(n));
    }
    processSegmentGroup(injector, config, segmentGroup, outlet) {
        if (segmentGroup.segments.length === 0 && segmentGroup.hasChildren()) {
            return this.processChildren(injector, config, segmentGroup);
        }
        return this.processSegment(injector, config, segmentGroup, segmentGroup.segments, outlet);
    }
    /**
     * Matches every child outlet in the `segmentGroup` to a `Route` in the config. Returns `null` if
     * we cannot find a match for _any_ of the children.
     *
     * @param config - The `Routes` to match against
     * @param segmentGroup - The `UrlSegmentGroup` whose children need to be matched against the
     *     config.
     */
    processChildren(injector, config, segmentGroup) {
        return from(Object.keys(segmentGroup.children))
            .pipe(concatMap(childOutlet => {
            const child = segmentGroup.children[childOutlet];
            // Sort the config so that routes with outlets that match the one being activated
            // appear first, followed by routes for other outlets, which might match if they have
            // an empty path.
            const sortedConfig = sortByMatchingOutlets(config, childOutlet);
            return this.processSegmentGroup(injector, sortedConfig, child, childOutlet);
        }), scan((children, outletChildren) => {
            if (!children || !outletChildren)
                return null;
            children.push(...outletChildren);
            return children;
        }), takeWhile(children => children !== null), defaultIfEmpty(null), rxjsLast(), map(children => {
            if (children === null)
                return null;
            // Because we may have matched two outlets to the same empty path segment, we can have
            // multiple activated results for the same outlet. We should merge the children of
            // these results so the final return value is only one `TreeNode` per outlet.
            const mergedChildren = mergeEmptyPathMatches(children);
            if (NG_DEV_MODE) {
                // This should really never happen - we are only taking the first match for each
                // outlet and merge the empty path matches.
                checkOutletNameUniqueness(mergedChildren);
            }
            sortActivatedRouteSnapshots(mergedChildren);
            return mergedChildren;
        }));
    }
    processSegment(injector, routes, segmentGroup, segments, outlet) {
        return from(routes).pipe(concatMap(r => {
            return this.processSegmentAgainstRoute(r._injector ?? injector, r, segmentGroup, segments, outlet);
        }), first((x) => !!x), catchError(e => {
            if (isEmptyError(e)) {
                if (noLeftoversInUrl(segmentGroup, segments, outlet)) {
                    return of([]);
                }
                return of(null);
            }
            throw e;
        }));
    }
    processSegmentAgainstRoute(injector, route, rawSegment, segments, outlet) {
        if (route.redirectTo || !isImmediateMatch(route, rawSegment, segments, outlet))
            return of(null);
        let matchResult;
        if (route.path === '**') {
            const params = segments.length > 0 ? last(segments).parameters : {};
            const pathIndexShift = getPathIndexShift(rawSegment) + segments.length;
            const snapshot = new ActivatedRouteSnapshot(segments, params, Object.freeze({ ...this.urlTree.queryParams }), this.urlTree.fragment, getData(route), getOutlet(route), route.component ?? route._loadedComponent ?? null, route, getSourceSegmentGroup(rawSegment), pathIndexShift, getResolve(route), 
            // NG_DEV_MODE is used to prevent the getCorrectedPathIndexShift function from affecting
            // production bundle size. This value is intended only to surface a warning to users
            // depending on `relativeLinkResolution: 'legacy'` in dev mode.
            (NG_DEV_MODE ? getCorrectedPathIndexShift(rawSegment) + segments.length :
                pathIndexShift));
            matchResult = of({
                snapshot,
                consumedSegments: [],
                remainingSegments: [],
            });
        }
        else {
            matchResult =
                matchWithChecks(rawSegment, route, segments, injector, this.urlSerializer)
                    .pipe(map(({ matched, consumedSegments, remainingSegments, parameters }) => {
                    if (!matched) {
                        return null;
                    }
                    const pathIndexShift = getPathIndexShift(rawSegment) + consumedSegments.length;
                    const snapshot = new ActivatedRouteSnapshot(consumedSegments, parameters, Object.freeze({ ...this.urlTree.queryParams }), this.urlTree.fragment, getData(route), getOutlet(route), route.component ?? route._loadedComponent ?? null, route, getSourceSegmentGroup(rawSegment), pathIndexShift, getResolve(route), (NG_DEV_MODE ?
                        getCorrectedPathIndexShift(rawSegment) + consumedSegments.length :
                        pathIndexShift));
                    return { snapshot, consumedSegments, remainingSegments };
                }));
        }
        return matchResult.pipe(switchMap((result) => {
            if (result === null) {
                return of(null);
            }
            const { snapshot, consumedSegments, remainingSegments } = result;
            // If the route has an injector created from providers, we should start using that.
            injector = route._injector ?? injector;
            const childInjector = route._loadedInjector ?? injector;
            const childConfig = getChildConfig(route);
            const { segmentGroup, slicedSegments } = split(rawSegment, consumedSegments, remainingSegments, 
            // Filter out routes with redirectTo because we are trying to create activated route
            // snapshots and don't handle redirects here. That should have been done in
            // `applyRedirects`.
            childConfig.filter(c => c.redirectTo === undefined), this.relativeLinkResolution);
            if (slicedSegments.length === 0 && segmentGroup.hasChildren()) {
                return this.processChildren(childInjector, childConfig, segmentGroup).pipe(map(children => {
                    if (children === null) {
                        return null;
                    }
                    return [new TreeNode(snapshot, children)];
                }));
            }
            if (childConfig.length === 0 && slicedSegments.length === 0) {
                return of([new TreeNode(snapshot, [])]);
            }
            const matchedOnOutlet = getOutlet(route) === outlet;
            // If we matched a config due to empty path match on a different outlet, we need to
            // continue passing the current outlet for the segment rather than switch to PRIMARY.
            // Note that we switch to primary when we have a match because outlet configs look like
            // this: {path: 'a', outlet: 'a', children: [
            //  {path: 'b', component: B},
            //  {path: 'c', component: C},
            // ]}
            // Notice that the children of the named outlet are configured with the primary outlet
            return this
                .processSegment(childInjector, childConfig, segmentGroup, slicedSegments, matchedOnOutlet ? PRIMARY_OUTLET : outlet)
                .pipe(map(children => {
                if (children === null) {
                    return null;
                }
                return [new TreeNode(snapshot, children)];
            }));
        }));
    }
}
function sortActivatedRouteSnapshots(nodes) {
    nodes.sort((a, b) => {
        if (a.value.outlet === PRIMARY_OUTLET)
            return -1;
        if (b.value.outlet === PRIMARY_OUTLET)
            return 1;
        return a.value.outlet.localeCompare(b.value.outlet);
    });
}
function getChildConfig(route) {
    if (route.children) {
        return route.children;
    }
    if (route.loadChildren) {
        return route._loadedRoutes;
    }
    return [];
}
function hasEmptyPathConfig(node) {
    const config = node.value.routeConfig;
    return config && config.path === '' && config.redirectTo === undefined;
}
/**
 * Finds `TreeNode`s with matching empty path route configs and merges them into `TreeNode` with
 * the children from each duplicate. This is necessary because different outlets can match a
 * single empty path route config and the results need to then be merged.
 */
function mergeEmptyPathMatches(nodes) {
    const result = [];
    // The set of nodes which contain children that were merged from two duplicate empty path nodes.
    const mergedNodes = new Set();
    for (const node of nodes) {
        if (!hasEmptyPathConfig(node)) {
            result.push(node);
            continue;
        }
        const duplicateEmptyPathNode = result.find(resultNode => node.value.routeConfig === resultNode.value.routeConfig);
        if (duplicateEmptyPathNode !== undefined) {
            duplicateEmptyPathNode.children.push(...node.children);
            mergedNodes.add(duplicateEmptyPathNode);
        }
        else {
            result.push(node);
        }
    }
    // For each node which has children from multiple sources, we need to recompute a new `TreeNode`
    // by also merging those children. This is necessary when there are multiple empty path configs
    // in a row. Put another way: whenever we combine children of two nodes, we need to also check
    // if any of those children can be combined into a single node as well.
    for (const mergedNode of mergedNodes) {
        const mergedChildren = mergeEmptyPathMatches(mergedNode.children);
        result.push(new TreeNode(mergedNode.value, mergedChildren));
    }
    return result.filter(n => !mergedNodes.has(n));
}
function checkOutletNameUniqueness(nodes) {
    const names = {};
    nodes.forEach(n => {
        const routeWithSameOutletName = names[n.value.outlet];
        if (routeWithSameOutletName) {
            const p = routeWithSameOutletName.url.map(s => s.toString()).join('/');
            const c = n.value.url.map(s => s.toString()).join('/');
            throw new RuntimeError(4006 /* RuntimeErrorCode.TWO_SEGMENTS_WITH_SAME_OUTLET */, NG_DEV_MODE && `Two segments cannot have the same outlet name: '${p}' and '${c}'.`);
        }
        names[n.value.outlet] = n.value;
    });
}
function getSourceSegmentGroup(segmentGroup) {
    let s = segmentGroup;
    while (s._sourceSegment) {
        s = s._sourceSegment;
    }
    return s;
}
function getPathIndexShift(segmentGroup) {
    let s = segmentGroup;
    let res = s._segmentIndexShift ?? 0;
    while (s._sourceSegment) {
        s = s._sourceSegment;
        res += s._segmentIndexShift ?? 0;
    }
    return res - 1;
}
function getCorrectedPathIndexShift(segmentGroup) {
    let s = segmentGroup;
    let res = s._segmentIndexShiftCorrected ?? s._segmentIndexShift ?? 0;
    while (s._sourceSegment) {
        s = s._sourceSegment;
        res += s._segmentIndexShiftCorrected ?? s._segmentIndexShift ?? 0;
    }
    return res - 1;
}
function getData(route) {
    return route.data || {};
}
function getResolve(route) {
    return route.resolve || {};
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {EnvironmentInjector, Type, ɵRuntimeError as RuntimeError} from '@angular/core';\nimport {EmptyError, from, Observable, Observer, of} from 'rxjs';\nimport {catchError, concatMap, defaultIfEmpty, first, last as rxjsLast, map, scan, switchMap, takeWhile} from 'rxjs/operators';\n\nimport {RuntimeErrorCode} from './errors';\nimport {Data, ResolveData, Route, Routes} from './models';\nimport {ActivatedRouteSnapshot, inheritedParamsDataResolve, ParamsInheritanceStrategy, RouterStateSnapshot} from './router_state';\nimport {PRIMARY_OUTLET} from './shared';\nimport {UrlSegment, UrlSegmentGroup, UrlSerializer, UrlTree} from './url_tree';\nimport {last} from './utils/collection';\nimport {getOutlet, sortByMatchingOutlets} from './utils/config';\nimport {isImmediateMatch, matchWithChecks, noLeftoversInUrl, split} from './utils/config_matching';\nimport {TreeNode} from './utils/tree';\nimport {isEmptyError} from './utils/type_guards';\n\nconst NG_DEV_MODE = typeof ngDevMode === 'undefined' || !!ngDevMode;\n\nclass NoMatch {}\n\nfunction newObservableError(e: unknown): Observable<RouterStateSnapshot> {\n  // TODO(atscott): This pattern is used throughout the router code and can be `throwError` instead.\n  return new Observable<RouterStateSnapshot>((obs: Observer<RouterStateSnapshot>) => obs.error(e));\n}\n\nexport function recognize(\n    injector: EnvironmentInjector, rootComponentType: Type<any>|null, config: Routes,\n    urlTree: UrlTree, url: string, urlSerializer: UrlSerializer,\n    paramsInheritanceStrategy: ParamsInheritanceStrategy = 'emptyOnly',\n    relativeLinkResolution: 'legacy'|'corrected' = 'legacy'): Observable<RouterStateSnapshot> {\n  return new Recognizer(\n             injector, rootComponentType, config, urlTree, url, paramsInheritanceStrategy,\n             relativeLinkResolution, urlSerializer)\n      .recognize()\n      .pipe(switchMap(result => {\n        if (result === null) {\n          return newObservableError(new NoMatch());\n        } else {\n          return of(result);\n        }\n      }));\n}\n\nexport class Recognizer {\n  constructor(\n      private injector: EnvironmentInjector, private rootComponentType: Type<any>|null,\n      private config: Routes, private urlTree: UrlTree, private url: string,\n      private paramsInheritanceStrategy: ParamsInheritanceStrategy,\n      private relativeLinkResolution: 'legacy'|'corrected',\n      private readonly urlSerializer: UrlSerializer) {}\n\n  recognize(): Observable<RouterStateSnapshot|null> {\n    const rootSegmentGroup =\n        split(\n            this.urlTree.root, [], [], this.config.filter(c => c.redirectTo === undefined),\n            this.relativeLinkResolution)\n            .segmentGroup;\n\n    return this.processSegmentGroup(this.injector, this.config, rootSegmentGroup, PRIMARY_OUTLET)\n        .pipe(map(children => {\n          if (children === null) {\n            return null;\n          }\n\n          // Use Object.freeze to prevent readers of the Router state from modifying it outside of a\n          // navigation, resulting in the router being out of sync with the browser.\n          const root = new ActivatedRouteSnapshot(\n              [], Object.freeze({}), Object.freeze({...this.urlTree.queryParams}),\n              this.urlTree.fragment, {}, PRIMARY_OUTLET, this.rootComponentType, null,\n              this.urlTree.root, -1, {});\n\n          const rootNode = new TreeNode<ActivatedRouteSnapshot>(root, children);\n          const routeState = new RouterStateSnapshot(this.url, rootNode);\n          this.inheritParamsAndData(routeState._root);\n          return routeState;\n        }));\n  }\n\n  inheritParamsAndData(routeNode: TreeNode<ActivatedRouteSnapshot>): void {\n    const route = routeNode.value;\n\n    const i = inheritedParamsDataResolve(route, this.paramsInheritanceStrategy);\n    route.params = Object.freeze(i.params);\n    route.data = Object.freeze(i.data);\n\n    routeNode.children.forEach(n => this.inheritParamsAndData(n));\n  }\n\n  processSegmentGroup(\n      injector: EnvironmentInjector, config: Route[], segmentGroup: UrlSegmentGroup,\n      outlet: string): Observable<TreeNode<ActivatedRouteSnapshot>[]|null> {\n    if (segmentGroup.segments.length === 0 && segmentGroup.hasChildren()) {\n      return this.processChildren(injector, config, segmentGroup);\n    }\n\n    return this.processSegment(injector, config, segmentGroup, segmentGroup.segments, outlet);\n  }\n\n  /**\n   * Matches every child outlet in the `segmentGroup` to a `Route` in the config. Returns `null` if\n   * we cannot find a match for _any_ of the children.\n   *\n   * @param config - The `Routes` to match against\n   * @param segmentGroup - The `UrlSegmentGroup` whose children need to be matched against the\n   *     config.\n   */\n  processChildren(injector: EnvironmentInjector, config: Route[], segmentGroup: UrlSegmentGroup):\n      Observable<TreeNode<ActivatedRouteSnapshot>[]|null> {\n    return from(Object.keys(segmentGroup.children))\n        .pipe(\n            concatMap(childOutlet => {\n              const child = segmentGroup.children[childOutlet];\n              // Sort the config so that routes with outlets that match the one being activated\n              // appear first, followed by routes for other outlets, which might match if they have\n              // an empty path.\n              const sortedConfig = sortByMatchingOutlets(config, childOutlet);\n              return this.processSegmentGroup(injector, sortedConfig, child, childOutlet);\n            }),\n            scan((children, outletChildren) => {\n              if (!children || !outletChildren) return null;\n              children.push(...outletChildren);\n              return children;\n            }),\n            takeWhile(children => children !== null),\n            defaultIfEmpty(null as TreeNode<ActivatedRouteSnapshot>[] | null),\n            rxjsLast(),\n            map(children => {\n              if (children === null) return null;\n              // Because we may have matched two outlets to the same empty path segment, we can have\n              // multiple activated results for the same outlet. We should merge the children of\n              // these results so the final return value is only one `TreeNode` per outlet.\n              const mergedChildren = mergeEmptyPathMatches(children);\n              if (NG_DEV_MODE) {\n                // This should really never happen - we are only taking the first match for each\n                // outlet and merge the empty path matches.\n                checkOutletNameUniqueness(mergedChildren);\n              }\n              sortActivatedRouteSnapshots(mergedChildren);\n              return mergedChildren;\n            }),\n        );\n  }\n\n  processSegment(\n      injector: EnvironmentInjector, routes: Route[], segmentGroup: UrlSegmentGroup,\n      segments: UrlSegment[], outlet: string): Observable<TreeNode<ActivatedRouteSnapshot>[]|null> {\n    return from(routes).pipe(\n        concatMap(r => {\n          return this.processSegmentAgainstRoute(\n              r._injector ?? injector, r, segmentGroup, segments, outlet);\n        }),\n        first((x): x is TreeNode<ActivatedRouteSnapshot>[] => !!x), catchError(e => {\n          if (isEmptyError(e)) {\n            if (noLeftoversInUrl(segmentGroup, segments, outlet)) {\n              return of([]);\n            }\n            return of(null);\n          }\n          throw e;\n        }));\n  }\n\n  processSegmentAgainstRoute(\n      injector: EnvironmentInjector, route: Route, rawSegment: UrlSegmentGroup,\n      segments: UrlSegment[], outlet: string): Observable<TreeNode<ActivatedRouteSnapshot>[]|null> {\n    if (route.redirectTo || !isImmediateMatch(route, rawSegment, segments, outlet)) return of(null);\n\n    let matchResult: Observable<{\n      snapshot: ActivatedRouteSnapshot,\n      consumedSegments: UrlSegment[],\n      remainingSegments: UrlSegment[],\n    }|null>;\n\n    if (route.path === '**') {\n      const params = segments.length > 0 ? last(segments)!.parameters : {};\n      const pathIndexShift = getPathIndexShift(rawSegment) + segments.length;\n      const snapshot = new ActivatedRouteSnapshot(\n          segments, params, Object.freeze({...this.urlTree.queryParams}), this.urlTree.fragment,\n          getData(route), getOutlet(route), route.component ?? route._loadedComponent ?? null,\n          route, getSourceSegmentGroup(rawSegment), pathIndexShift, getResolve(route),\n          // NG_DEV_MODE is used to prevent the getCorrectedPathIndexShift function from affecting\n          // production bundle size. This value is intended only to surface a warning to users\n          // depending on `relativeLinkResolution: 'legacy'` in dev mode.\n          (NG_DEV_MODE ? getCorrectedPathIndexShift(rawSegment) + segments.length :\n                         pathIndexShift));\n      matchResult = of({\n        snapshot,\n        consumedSegments: [],\n        remainingSegments: [],\n      });\n    } else {\n      matchResult =\n          matchWithChecks(rawSegment, route, segments, injector, this.urlSerializer)\n              .pipe(map(({matched, consumedSegments, remainingSegments, parameters}) => {\n                if (!matched) {\n                  return null;\n                }\n                const pathIndexShift = getPathIndexShift(rawSegment) + consumedSegments.length;\n\n                const snapshot = new ActivatedRouteSnapshot(\n                    consumedSegments, parameters, Object.freeze({...this.urlTree.queryParams}),\n                    this.urlTree.fragment, getData(route), getOutlet(route),\n                    route.component ?? route._loadedComponent ?? null, route,\n                    getSourceSegmentGroup(rawSegment), pathIndexShift, getResolve(route),\n                    (NG_DEV_MODE ?\n                         getCorrectedPathIndexShift(rawSegment) + consumedSegments.length :\n                         pathIndexShift));\n                return {snapshot, consumedSegments, remainingSegments};\n              }));\n    }\n\n    return matchResult.pipe(switchMap((result) => {\n      if (result === null) {\n        return of(null);\n      }\n      const {snapshot, consumedSegments, remainingSegments} = result;\n      // If the route has an injector created from providers, we should start using that.\n      injector = route._injector ?? injector;\n      const childInjector = route._loadedInjector ?? injector;\n      const childConfig: Route[] = getChildConfig(route);\n\n      const {segmentGroup, slicedSegments} = split(\n          rawSegment, consumedSegments, remainingSegments,\n          // Filter out routes with redirectTo because we are trying to create activated route\n          // snapshots and don't handle redirects here. That should have been done in\n          // `applyRedirects`.\n          childConfig.filter(c => c.redirectTo === undefined), this.relativeLinkResolution);\n\n      if (slicedSegments.length === 0 && segmentGroup.hasChildren()) {\n        return this.processChildren(childInjector, childConfig, segmentGroup).pipe(map(children => {\n          if (children === null) {\n            return null;\n          }\n          return [new TreeNode<ActivatedRouteSnapshot>(snapshot, children)];\n        }));\n      }\n\n      if (childConfig.length === 0 && slicedSegments.length === 0) {\n        return of([new TreeNode<ActivatedRouteSnapshot>(snapshot, [])]);\n      }\n\n      const matchedOnOutlet = getOutlet(route) === outlet;\n      // If we matched a config due to empty path match on a different outlet, we need to\n      // continue passing the current outlet for the segment rather than switch to PRIMARY.\n      // Note that we switch to primary when we have a match because outlet configs look like\n      // this: {path: 'a', outlet: 'a', children: [\n      //  {path: 'b', component: B},\n      //  {path: 'c', component: C},\n      // ]}\n      // Notice that the children of the named outlet are configured with the primary outlet\n      return this\n          .processSegment(\n              childInjector, childConfig, segmentGroup, slicedSegments,\n              matchedOnOutlet ? PRIMARY_OUTLET : outlet)\n          .pipe(map(children => {\n            if (children === null) {\n              return null;\n            }\n            return [new TreeNode<ActivatedRouteSnapshot>(snapshot, children)];\n          }));\n    }));\n  }\n}\n\nfunction sortActivatedRouteSnapshots(nodes: TreeNode<ActivatedRouteSnapshot>[]): void {\n  nodes.sort((a, b) => {\n    if (a.value.outlet === PRIMARY_OUTLET) return -1;\n    if (b.value.outlet === PRIMARY_OUTLET) return 1;\n    return a.value.outlet.localeCompare(b.value.outlet);\n  });\n}\n\nfunction getChildConfig(route: Route): Route[] {\n  if (route.children) {\n    return route.children;\n  }\n\n  if (route.loadChildren) {\n    return route._loadedRoutes!;\n  }\n\n  return [];\n}\n\nfunction hasEmptyPathConfig(node: TreeNode<ActivatedRouteSnapshot>) {\n  const config = node.value.routeConfig;\n  return config && config.path === '' && config.redirectTo === undefined;\n}\n\n/**\n * Finds `TreeNode`s with matching empty path route configs and merges them into `TreeNode` with\n * the children from each duplicate. This is necessary because different outlets can match a\n * single empty path route config and the results need to then be merged.\n */\nfunction mergeEmptyPathMatches(nodes: Array<TreeNode<ActivatedRouteSnapshot>>):\n    Array<TreeNode<ActivatedRouteSnapshot>> {\n  const result: Array<TreeNode<ActivatedRouteSnapshot>> = [];\n  // The set of nodes which contain children that were merged from two duplicate empty path nodes.\n  const mergedNodes: Set<TreeNode<ActivatedRouteSnapshot>> = new Set();\n\n  for (const node of nodes) {\n    if (!hasEmptyPathConfig(node)) {\n      result.push(node);\n      continue;\n    }\n\n    const duplicateEmptyPathNode =\n        result.find(resultNode => node.value.routeConfig === resultNode.value.routeConfig);\n    if (duplicateEmptyPathNode !== undefined) {\n      duplicateEmptyPathNode.children.push(...node.children);\n      mergedNodes.add(duplicateEmptyPathNode);\n    } else {\n      result.push(node);\n    }\n  }\n  // For each node which has children from multiple sources, we need to recompute a new `TreeNode`\n  // by also merging those children. This is necessary when there are multiple empty path configs\n  // in a row. Put another way: whenever we combine children of two nodes, we need to also check\n  // if any of those children can be combined into a single node as well.\n  for (const mergedNode of mergedNodes) {\n    const mergedChildren = mergeEmptyPathMatches(mergedNode.children);\n    result.push(new TreeNode(mergedNode.value, mergedChildren));\n  }\n  return result.filter(n => !mergedNodes.has(n));\n}\n\nfunction checkOutletNameUniqueness(nodes: TreeNode<ActivatedRouteSnapshot>[]): void {\n  const names: {[k: string]: ActivatedRouteSnapshot} = {};\n  nodes.forEach(n => {\n    const routeWithSameOutletName = names[n.value.outlet];\n    if (routeWithSameOutletName) {\n      const p = routeWithSameOutletName.url.map(s => s.toString()).join('/');\n      const c = n.value.url.map(s => s.toString()).join('/');\n      throw new RuntimeError(\n          RuntimeErrorCode.TWO_SEGMENTS_WITH_SAME_OUTLET,\n          NG_DEV_MODE && `Two segments cannot have the same outlet name: '${p}' and '${c}'.`);\n    }\n    names[n.value.outlet] = n.value;\n  });\n}\n\nfunction getSourceSegmentGroup(segmentGroup: UrlSegmentGroup): UrlSegmentGroup {\n  let s = segmentGroup;\n  while (s._sourceSegment) {\n    s = s._sourceSegment;\n  }\n  return s;\n}\n\nfunction getPathIndexShift(segmentGroup: UrlSegmentGroup): number {\n  let s = segmentGroup;\n  let res = s._segmentIndexShift ?? 0;\n  while (s._sourceSegment) {\n    s = s._sourceSegment;\n    res += s._segmentIndexShift ?? 0;\n  }\n  return res - 1;\n}\n\nfunction getCorrectedPathIndexShift(segmentGroup: UrlSegmentGroup): number {\n  let s = segmentGroup;\n  let res = s._segmentIndexShiftCorrected ?? s._segmentIndexShift ?? 0;\n  while (s._sourceSegment) {\n    s = s._sourceSegment;\n    res += s._segmentIndexShiftCorrected ?? s._segmentIndexShift ?? 0;\n  }\n  return res - 1;\n}\n\nfunction getData(route: Route): Data {\n  return route.data || {};\n}\n\nfunction getResolve(route: Route): ResolveData {\n  return route.resolve || {};\n}\n"]}