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router-url-tree.ts
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86 lines (79 loc) · 2.58 KB
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/* tslint:disable:forin */
// Copied unexported functions from @angular/router/src/url_tree
import { UrlTree, UrlSegment, PRIMARY_OUTLET } from "@angular/router";
// UrlSegmentGroup not exported, just use any.
type UrlSegmentGroup = any;
export function containsTree(container: UrlTree, containee: UrlTree, exact: boolean): boolean {
if (exact) {
return equalSegmentGroups(container.root, containee.root);
} else {
return containsSegmentGroup(container.root, containee.root);
}
}
function equalSegmentGroups(container: UrlSegmentGroup, containee: UrlSegmentGroup): boolean {
if (!equalPath(container.segments, containee.segments)) {
return false;
}
if (container.numberOfChildren !== containee.numberOfChildren) {
return false;
}
for (let c in containee.children) {
if (!container.children[c]) {
return false;
}
if (!equalSegmentGroups(container.children[c], containee.children[c])) {
return false;
}
}
return true;
}
function containsSegmentGroup(container: UrlSegmentGroup, containee: UrlSegmentGroup): boolean {
return containsSegmentGroupHelper(container, containee, containee.segments);
}
function containsSegmentGroupHelper(
container: UrlSegmentGroup, containee: UrlSegmentGroup, containeePaths: UrlSegment[]): boolean {
if (container.segments.length > containeePaths.length) {
const current = container.segments.slice(0, containeePaths.length);
if (!equalPath(current, containeePaths)) {
return false;
}
if (containee.hasChildren()) {
return false;
}
return true;
} else if (container.segments.length === containeePaths.length) {
if (!equalPath(container.segments, containeePaths)) {
return false;
}
for (let c in containee.children) {
if (!container.children[c]) {
return false;
}
if (!containsSegmentGroup(container.children[c], containee.children[c])) {
return false;
}
}
return true;
} else {
const current = containeePaths.slice(0, container.segments.length);
const next = containeePaths.slice(container.segments.length);
if (!equalPath(container.segments, current)) {
return false;
}
if (!container.children[PRIMARY_OUTLET]) {
return false;
}
return containsSegmentGroupHelper(container.children[PRIMARY_OUTLET], containee, next);
}
}
export function equalPath(a: UrlSegment[], b: UrlSegment[]): boolean {
if (a.length !== b.length) {
return false;
}
for (let i = 0; i < a.length; ++i) {
if (a[i].path !== b[i].path) {
return false;
}
}
return true;
}