Method processChildren

packages/router/src/recognize.ts:188–233

* 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 t

(
    injector: EnvironmentInjector,
    config: Route[],
    segmentGroup: UrlSegmentGroup,
    parentRoute: ActivatedRouteSnapshot,
  )

   *     config.
   */
  async processChildren(
    injector: EnvironmentInjector,
    config: Route[],
    segmentGroup: UrlSegmentGroup,
    parentRoute: ActivatedRouteSnapshot,
  ): Promise<TreeNode<ActivatedRouteSnapshot>[]> {
    // Expand outlets one at a time, starting with the primary outlet. We need to do it this way
    // because an absolute redirect from the primary outlet takes precedence.
    const childOutlets: string[] = [];
    for (const child of Object.keys(segmentGroup.children)) {
      if (child === 'primary') {
        childOutlets.unshift(child);
      } else {
        childOutlets.push(child);
      }
    }

    let children: TreeNode<ActivatedRouteSnapshot>[] = [];
    for (const childOutlet of childOutlets) {
      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);
      const outletChildren = await this.processSegmentGroup(
        injector,
        sortedConfig,
        child,
        childOutlet,
        parentRoute,
      );
      children.push(...outletChildren);
    }

    // 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 (typeof ngDevMode === 'undefined' || ngDevMode) {
      // 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;
  }

  async processSegment(
    injector: EnvironmentInjector,