166 lines
26 KiB
JavaScript
166 lines
26 KiB
JavaScript
import { flatten, first, merge } from './utils/collection';
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import { TreeNode, rootNode } from './utils/tree';
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import { RouterState, ActivatedRoute } from './router_state';
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import { PRIMARY_OUTLET } from './shared';
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import { Observable } from 'rxjs/Observable';
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import { BehaviorSubject } from 'rxjs/BehaviorSubject';
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export function recognize(config, url, existingState) {
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try {
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const match = new MatchResult(existingState.root.component, config, [url.root], {}, rootNode(url).children, [], PRIMARY_OUTLET);
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existingState.queryParams.next(url.queryParameters);
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existingState.fragment.next(url.fragment);
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const roots = constructActivatedRoute(match, rootNode(existingState));
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const res = new RouterState(roots[0], existingState.queryParams, existingState.fragment);
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return new Observable(obs => {
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obs.next(res);
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obs.complete();
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});
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}
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catch (e) {
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return new Observable(obs => obs.error(e));
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}
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}
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function constructActivatedRoute(match, existingRoute) {
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const activatedRoute = createOrReuseRoute(match, existingRoute);
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const existingChildren = existingRoute ? existingRoute.children : [];
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if (match.leftOverUrl.length > 0) {
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const children = recognizeMany(match.children, match.leftOverUrl, existingChildren);
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checkOutletNameUniqueness(children);
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return [new TreeNode(activatedRoute, children)];
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}
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else {
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return [new TreeNode(activatedRoute, [])];
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}
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}
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function recognizeMany(config, urls, existingRoutes) {
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return flatten(urls.map(url => recognizeOne(config, url, existingRoutes)));
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}
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function createOrReuseRoute(match, existing) {
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if (existing) {
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const v = existing.value;
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if (v.component === match.component && v.outlet === match.outlet) {
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(v.params).next(match.parameters);
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(v.urlSegments).next(match.consumedUrlSegments);
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return v;
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}
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}
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return new ActivatedRoute(new BehaviorSubject(match.consumedUrlSegments), new BehaviorSubject(match.parameters), match.outlet, match.component);
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}
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function recognizeOne(config, url, existingRoutes) {
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let m = match(config, url);
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const routesWithRightOutlet = existingRoutes.filter(r => r.value.outlet == m.outlet);
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const routeWithRightOutlet = routesWithRightOutlet.length > 0 ? routesWithRightOutlet[0] : null;
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const primary = constructActivatedRoute(m, routeWithRightOutlet);
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const secondary = recognizeMany(config, m.secondary, existingRoutes);
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const res = primary.concat(secondary);
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checkOutletNameUniqueness(res);
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return res;
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}
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function checkOutletNameUniqueness(nodes) {
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let names = {};
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nodes.forEach(n => {
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let routeWithSameOutletName = names[n.value.outlet];
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if (routeWithSameOutletName) {
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const p = routeWithSameOutletName.urlSegments.value.map(s => s.toString()).join("/");
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const c = n.value.urlSegments.value.map(s => s.toString()).join("/");
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throw new Error(`Two segments cannot have the same outlet name: '${p}' and '${c}'.`);
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}
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names[n.value.outlet] = n.value;
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});
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return nodes;
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}
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function match(config, url) {
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const m = matchNonIndex(config, url);
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if (m)
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return m;
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const mIndex = matchIndex(config, url);
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if (mIndex)
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return mIndex;
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const availableRoutes = config.map(r => {
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const outlet = !r.outlet ? '' : `${r.outlet}:`;
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return `'${outlet}${r.path}'`;
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}).join(", ");
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throw new Error(`Cannot match any routes. Current segment: '${url.value}'. Available routes: [${availableRoutes}].`);
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}
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function matchNonIndex(config, url) {
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for (let r of config) {
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let m = matchWithParts(r, url);
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if (m)
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return m;
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}
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return null;
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}
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function matchIndex(config, url) {
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for (let r of config) {
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if (r.index) {
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const outlet = r.outlet ? r.outlet : PRIMARY_OUTLET;
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const children = r.children ? r.children : [];
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return new MatchResult(r.component, children, [], {}, [url], [], outlet);
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}
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}
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return null;
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}
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function matchWithParts(route, url) {
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if (!route.path)
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return null;
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if ((route.outlet ? route.outlet : PRIMARY_OUTLET) !== url.value.outlet)
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return null;
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const path = route.path.startsWith("/") ? route.path.substring(1) : route.path;
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if (path === "**") {
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const consumedUrl = [];
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let u = url;
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while (u) {
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consumedUrl.push(u.value);
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u = first(u.children);
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}
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const last = consumedUrl[consumedUrl.length - 1];
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return new MatchResult(route.component, [], consumedUrl, last.parameters, [], [], PRIMARY_OUTLET);
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}
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const parts = path.split("/");
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const positionalParams = {};
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const consumedUrlSegments = [];
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let lastParent = null;
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let lastSegment = null;
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let current = url;
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for (let i = 0; i < parts.length; ++i) {
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if (!current)
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return null;
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const p = parts[i];
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const isLastSegment = i === parts.length - 1;
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const isLastParent = i === parts.length - 2;
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const isPosParam = p.startsWith(":");
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if (!isPosParam && p != current.value.path)
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return null;
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if (isLastSegment) {
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lastSegment = current;
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}
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if (isLastParent) {
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lastParent = current;
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}
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if (isPosParam) {
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positionalParams[p.substring(1)] = current.value.path;
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}
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consumedUrlSegments.push(current.value);
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current = first(current.children);
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}
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if (!lastSegment)
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throw "Cannot be reached";
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const p = lastSegment.value.parameters;
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const parameters = merge(p, positionalParams);
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const secondarySubtrees = lastParent ? lastParent.children.slice(1) : [];
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const children = route.children ? route.children : [];
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const outlet = route.outlet ? route.outlet : PRIMARY_OUTLET;
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return new MatchResult(route.component, children, consumedUrlSegments, parameters, lastSegment.children, secondarySubtrees, outlet);
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}
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class MatchResult {
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constructor(component, children, consumedUrlSegments, parameters, leftOverUrl, secondary, outlet) {
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this.component = component;
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this.children = children;
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this.consumedUrlSegments = consumedUrlSegments;
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this.parameters = parameters;
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this.leftOverUrl = leftOverUrl;
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this.secondary = secondary;
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this.outlet = outlet;
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}
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}
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existingState.fragment);\n    return new Observable<RouterState>(obs => {\n      obs.next(res);\n      obs.complete();\n    });\n  } catch(e) {\n    return new Observable<RouterState>(obs => obs.error(e));\n  }\n}\n\nfunction constructActivatedRoute(match: MatchResult, existingRoute: TreeNode<ActivatedRoute> | null): TreeNode<ActivatedRoute>[] {\n  const activatedRoute = createOrReuseRoute(match, existingRoute);\n  const existingChildren = existingRoute ? existingRoute.children : [];\n\n  if (match.leftOverUrl.length > 0) {\n    const children = recognizeMany(match.children, match.leftOverUrl, existingChildren);\n    checkOutletNameUniqueness(children);\n    return [new TreeNode<ActivatedRoute>(activatedRoute, children)];\n  } else {\n    return [new TreeNode<ActivatedRoute>(activatedRoute, [])];\n  }\n}\n\nfunction recognizeMany(config: Route[], urls: TreeNode<UrlSegment>[],\n                       existingRoutes: TreeNode<ActivatedRoute>[]): TreeNode<ActivatedRoute>[] {\n  return flatten(urls.map(url => recognizeOne(config, url, existingRoutes)));\n}\n\nfunction createOrReuseRoute(match: MatchResult, existing: TreeNode<ActivatedRoute> | null): ActivatedRoute {\n  if (existing) {\n    const v = existing.value;\n    if (v.component === match.component && v.outlet === match.outlet) {\n      (<any>(v.params)).next(match.parameters);\n      (<any>(v.urlSegments)).next(match.consumedUrlSegments);\n      return v;\n    }\n  }\n  return new ActivatedRoute(new BehaviorSubject(match.consumedUrlSegments), new BehaviorSubject(match.parameters), match.outlet, match.component);\n}\n\nfunction recognizeOne(config: Route[], url: TreeNode<UrlSegment>,\n                      existingRoutes: TreeNode<ActivatedRoute>[]): TreeNode<ActivatedRoute>[] {\n  let m = match(config, url);\n\n  const routesWithRightOutlet = existingRoutes.filter(r => r.value.outlet == m.outlet);\n  const routeWithRightOutlet = routesWithRightOutlet.length > 0 ? routesWithRightOutlet[0] : null;\n\n  const primary = constructActivatedRoute(m, routeWithRightOutlet);\n  const secondary = recognizeMany(config, m.secondary, existingRoutes);\n  const res = primary.concat(secondary);\n  checkOutletNameUniqueness(res);\n  return res;\n}\n\nfunction checkOutletNameUniqueness(nodes: TreeNode<ActivatedRoute>[]): TreeNode<ActivatedRoute>[] {\n  let names = {};\n  nodes.forEach(n => {\n    let routeWithSameOutletName = names[n.value.outlet];\n    if (routeWithSameOutletName) {\n      const p = (<any>routeWithSameOutletName.urlSegments).value.map(s => s.toString()).join(\"/\");\n      const c = (<any>n.value.urlSegments).value.map(s => s.toString()).join(\"/\");\n      throw new Error(`Two segments cannot have the same outlet name: '${p}' and '${c}'.`);\n    }\n    names[n.value.outlet] = n.value;\n  });\n  return nodes;\n}\n\nfunction match(config: Route[], url: TreeNode<UrlSegment>): MatchResult {\n  const m = matchNonIndex(config, url);\n  if (m) return m;\n\n  const mIndex = matchIndex(config, url);\n  if (mIndex) return mIndex;\n\n  const availableRoutes = config.map(r => {\n    const outlet = !r.outlet ? '' : `${r.outlet}:`;\n    return `'${outlet}${r.path}'`;\n  }).join(\", \");\n  throw new Error(\n    `Cannot match any routes. Current segment: '${url.value}'. Available routes: [${availableRoutes}].`);\n}\n\nfunction matchNonIndex(config: Route[], url: TreeNode<UrlSegment>): MatchResult | null {\n  for (let r of config) {\n    let m = matchWithParts(r, url);\n    if (m) return m;\n  }\n  return null;\n}\n\nfunction matchIndex(config: Route[], url: TreeNode<UrlSegment>): MatchResult | null {\n  for (let r of config) {\n    if (r.index) {\n      const outlet = r.outlet ? r.outlet : PRIMARY_OUTLET;\n      const children = r.children ? r.children : [];\n      return new MatchResult(r.component, children, [], {}, [url], [], outlet);\n    }\n  }\n  return null;\n}\n\nfunction matchWithParts(route: Route, url: TreeNode<UrlSegment>): MatchResult | null {\n  if (!route.path) return null;\n  if ((route.outlet ? route.outlet : PRIMARY_OUTLET) !== url.value.outlet) return null;\n\n  const path = route.path.startsWith(\"/\") ? route.path.substring(1) : route.path;\n  if (path === \"**\") {\n    const consumedUrl = [];\n    let u:TreeNode<UrlSegment>|null = url;\n    while (u) {\n      consumedUrl.push(u.value);\n      u = first(u.children);\n    }\n    const last = consumedUrl[consumedUrl.length - 1];\n    return new MatchResult(route.component, [], consumedUrl, last.parameters, [], [], PRIMARY_OUTLET);\n  }\n\n  const parts = path.split(\"/\");\n  const positionalParams = {};\n  const consumedUrlSegments = [];\n\n  let lastParent: TreeNode<UrlSegment>|null = null;\n  let lastSegment: TreeNode<UrlSegment>|null = null;\n\n  let current: TreeNode<UrlSegment>|null = url;\n  for (let i = 0; i < parts.length; ++i) {\n    if (!current) return null;\n\n    const p = parts[i];\n    const isLastSegment = i === parts.length - 1;\n    const isLastParent = i === parts.length - 2;\n    const isPosParam = p.startsWith(\":\");\n\n    if (!isPosParam && p != current.value.path) return null;\n    if (isLastSegment) {\n      lastSegment = current;\n    }\n    if (isLastParent) {\n      lastParent = current;\n    }\n\n    if (isPosParam) {\n      positionalParams[p.substring(1)] = current.value.path;\n    }\n\n    consumedUrlSegments.push(current.value);\n\n    current = first(current.children);\n  }\n\n  if (!lastSegment) throw \"Cannot be reached\";\n\n  const p = lastSegment.value.parameters;\n  const parameters = <{[key: string]: string}>merge(p, positionalParams);\n  const secondarySubtrees = lastParent ? lastParent.children.slice(1) : [];\n  const children = route.children ? route.children : [];\n  const outlet = route.outlet ? route.outlet : PRIMARY_OUTLET;\n\n  return new MatchResult(route.component, children, consumedUrlSegments, parameters, lastSegment.children,\n    secondarySubtrees, outlet);\n}\n\nclass MatchResult {\n  constructor(public component: Type | string,\n              public children: Route[],\n              public consumedUrlSegments: UrlSegment[],\n              public parameters: {[key: string]: string},\n              public leftOverUrl: TreeNode<UrlSegment>[],\n              public secondary: TreeNode<UrlSegment>[],\n              public outlet: string\n  ) {}\n}"]}
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