@angular/router
Version:
Angular - the routing library
108 lines (107 loc) • 35 kB
JavaScript
/**
* @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 { EmptyOutletComponent } from './components/empty_outlet';
import { PRIMARY_OUTLET } from './shared';
export class LoadedRouterConfig {
constructor(routes, module) {
this.routes = routes;
this.module = module;
}
}
export function validateConfig(config, parentPath = '') {
// forEach doesn't iterate undefined values
for (let i = 0; i < config.length; i++) {
const route = config[i];
const fullPath = getFullPath(parentPath, route);
validateNode(route, fullPath);
}
}
function validateNode(route, fullPath) {
if (!route) {
throw new Error(`
Invalid configuration of route '${fullPath}': Encountered undefined route.
The reason might be an extra comma.
Example:
const routes: Routes = [
{ path: '', redirectTo: '/dashboard', pathMatch: 'full' },
{ path: 'dashboard', component: DashboardComponent },, << two commas
{ path: 'detail/:id', component: HeroDetailComponent }
];
`);
}
if (Array.isArray(route)) {
throw new Error(`Invalid configuration of route '${fullPath}': Array cannot be specified`);
}
if (!route.component && !route.children && !route.loadChildren &&
(route.outlet && route.outlet !== PRIMARY_OUTLET)) {
throw new Error(`Invalid configuration of route '${fullPath}': a componentless route without children or loadChildren cannot have a named outlet set`);
}
if (route.redirectTo && route.children) {
throw new Error(`Invalid configuration of route '${fullPath}': redirectTo and children cannot be used together`);
}
if (route.redirectTo && route.loadChildren) {
throw new Error(`Invalid configuration of route '${fullPath}': redirectTo and loadChildren cannot be used together`);
}
if (route.children && route.loadChildren) {
throw new Error(`Invalid configuration of route '${fullPath}': children and loadChildren cannot be used together`);
}
if (route.redirectTo && route.component) {
throw new Error(`Invalid configuration of route '${fullPath}': redirectTo and component cannot be used together`);
}
if (route.path && route.matcher) {
throw new Error(`Invalid configuration of route '${fullPath}': path and matcher cannot be used together`);
}
if (route.redirectTo === void 0 && !route.component && !route.children && !route.loadChildren) {
throw new Error(`Invalid configuration of route '${fullPath}'. One of the following must be provided: component, redirectTo, children or loadChildren`);
}
if (route.path === void 0 && route.matcher === void 0) {
throw new Error(`Invalid configuration of route '${fullPath}': routes must have either a path or a matcher specified`);
}
if (typeof route.path === 'string' && route.path.charAt(0) === '/') {
throw new Error(`Invalid configuration of route '${fullPath}': path cannot start with a slash`);
}
if (route.path === '' && route.redirectTo !== void 0 && route.pathMatch === void 0) {
const exp = `The default value of 'pathMatch' is 'prefix', but often the intent is to use 'full'.`;
throw new Error(`Invalid configuration of route '{path: "${fullPath}", redirectTo: "${route.redirectTo}"}': please provide 'pathMatch'. ${exp}`);
}
if (route.pathMatch !== void 0 && route.pathMatch !== 'full' && route.pathMatch !== 'prefix') {
throw new Error(`Invalid configuration of route '${fullPath}': pathMatch can only be set to 'prefix' or 'full'`);
}
if (route.children) {
validateConfig(route.children, fullPath);
}
}
function getFullPath(parentPath, currentRoute) {
if (!currentRoute) {
return parentPath;
}
if (!parentPath && !currentRoute.path) {
return '';
}
else if (parentPath && !currentRoute.path) {
return `${parentPath}/`;
}
else if (!parentPath && currentRoute.path) {
return currentRoute.path;
}
else {
return `${parentPath}/${currentRoute.path}`;
}
}
/**
* Makes a copy of the config and adds any default required properties.
*/
export function standardizeConfig(r) {
const children = r.children && r.children.map(standardizeConfig);
const c = children ? Object.assign(Object.assign({}, r), { children }) : Object.assign({}, r);
if (!c.component && (children || c.loadChildren) && (c.outlet && c.outlet !== PRIMARY_OUTLET)) {
c.component = EmptyOutletComponent;
}
return c;
}
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Implement a custom URL matcher\n * for `Route.matcher` when a combination of `path` and `pathMatch`\n * is not expressive enough. Cannot be used together with `path` and `pathMatch`.\n *\n * @param segments An array of URL segments.\n * @param group A segment group.\n * @param route The route to match against.\n * @returns The match-result.\n *\n * @usageNotes\n *\n * The following matcher matches HTML files.\n *\n * ```\n * export function htmlFiles(url: UrlSegment[]) {\n *   return url.length === 1 && url[0].path.endsWith('.html') ? ({consumed: url}) : null;\n * }\n *\n * export const routes = [{ matcher: htmlFiles, component: AnyComponent }];\n * ```\n *\n * @publicApi\n */\nexport type UrlMatcher = (segments: UrlSegment[], group: UrlSegmentGroup, route: Route) =>\n    UrlMatchResult|null;\n\n/**\n *\n * Represents static data associated with a particular route.\n *\n * @see `Route#data`\n *\n * @publicApi\n */\nexport type Data = {\n  [name: string]: any\n};\n\n/**\n *\n * Represents the resolved data associated with a particular route.\n *\n * @see `Route#resolve`.\n *\n * @publicApi\n */\nexport type ResolveData = {\n  [name: string]: any\n};\n\n/**\n *\n * A function that is called to resolve a collection of lazy-loaded routes.\n *\n * Often this function will be implemented using an ES dynamic `import()` expression. For example:\n *\n * ```\n * [{\n *   path: 'lazy',\n *   loadChildren: () => import('./lazy-route/lazy.module').then(mod => mod.LazyModule),\n * }];\n * ```\n *\n * This function _must_ match the form above: an arrow function of the form\n * `() => import('...').then(mod => mod.MODULE)`.\n *\n * @see `Route#loadChildren`.\n * @publicApi\n */\nexport type LoadChildrenCallback = () => Type<any>|NgModuleFactory<any>|Observable<Type<any>>|\n    Promise<NgModuleFactory<any>|Type<any>|any>;\n\n/**\n *\n * A string of the form `path/to/file#exportName` that acts as a URL for a set of routes to load,\n * or a function that returns such a set.\n *\n * The string form of `LoadChildren` is deprecated (see `DeprecatedLoadChildren`). The function\n * form (`LoadChildrenCallback`) should be used instead.\n *\n * @see `Route#loadChildren`.\n * @publicApi\n */\nexport type LoadChildren = LoadChildrenCallback|DeprecatedLoadChildren;\n\n/**\n * A string of the form `path/to/file#exportName` that acts as a URL for a set of routes to load.\n *\n * @see `Route#loadChildren`\n * @publicApi\n * @deprecated the `string` form of `loadChildren` is deprecated in favor of the proposed ES dynamic\n * `import()` expression, which offers a more natural and standards-based mechanism to dynamically\n * load an ES module at runtime.\n */\nexport type DeprecatedLoadChildren = string;\n\n/**\n *\n * How to handle query parameters in a router link.\n * One of:\n * - `merge` : Merge new with current parameters.\n * - `preserve` : Preserve current parameters.\n *\n * @see `NavigationExtras#queryParamsHandling`\n * @see `RouterLink`\n * @publicApi\n */\nexport type QueryParamsHandling = 'merge'|'preserve'|'';\n\n/**\n *\n * A policy for when to run guards and resolvers on a route.\n *\n * @see `Route#runGuardsAndResolvers`\n * @publicApi\n */\nexport type RunGuardsAndResolvers =\n    'pathParamsChange'|'pathParamsOrQueryParamsChange'|'paramsChange'|'paramsOrQueryParamsChange'|\n    'always'|((from: ActivatedRouteSnapshot, to: ActivatedRouteSnapshot) => boolean);\n\n/**\n * A configuration object that defines a single route.\n * A set of routes are collected in a `Routes` array to define a `Router` configuration.\n * The router attempts to match segments of a given URL against each route,\n * using the configuration options defined in this object.\n *\n * Supports static, parameterized, redirect, and wildcard routes, as well as\n * custom route data and resolve methods.\n *\n * For detailed usage information, see the [Routing Guide](guide/router).\n *\n * @usageNotes\n *\n * ### Simple Configuration\n *\n * The following route specifies that when navigating to, for example,\n * `/team/11/user/bob`, the router creates the 'Team' component\n * with the 'User' child component in it.\n *\n * ```\n * [{\n *   path: 'team/:id',\n  *  component: Team,\n *   children: [{\n *     path: 'user/:name',\n *     component: User\n *   }]\n * }]\n * ```\n *\n * ### Multiple Outlets\n *\n * The following route creates sibling components with multiple outlets.\n * When navigating to `/team/11(aux:chat/jim)`, the router creates the 'Team' component next to\n * the 'Chat' component. The 'Chat' component is placed into the 'aux' outlet.\n *\n * ```\n * [{\n *   path: 'team/:id',\n *   component: Team\n * }, {\n *   path: 'chat/:user',\n *   component: Chat\n *   outlet: 'aux'\n * }]\n * ```\n *\n * ### Wild Cards\n *\n * The following route uses wild-card notation to specify a component\n * that is always instantiated regardless of where you navigate to.\n *\n * ```\n * [{\n *   path: '**',\n *   component: WildcardComponent\n * }]\n * ```\n *\n * ### Redirects\n *\n * The following route uses the `redirectTo` property to ignore a segment of\n * a given URL when looking for a child path.\n *\n * When navigating to '/team/11/legacy/user/jim', the router changes the URL segment\n * '/team/11/legacy/user/jim' to '/team/11/user/jim', and then instantiates\n * the Team component with the User child component in it.\n *\n * ```\n * [{\n *   path: 'team/:id',\n *   component: Team,\n *   children: [{\n *     path: 'legacy/user/:name',\n *     redirectTo: 'user/:name'\n *   }, {\n *     path: 'user/:name',\n *     component: User\n *   }]\n * }]\n * ```\n *\n * The redirect path can be relative, as shown in this example, or absolute.\n * If we change the `redirectTo` value in the example to the absolute URL segment '/user/:name',\n * the result URL is also absolute, '/user/jim'.\n\n * ### Empty Path\n *\n * Empty-path route configurations can be used to instantiate components that do not 'consume'\n * any URL segments.\n *\n * In the following configuration, when navigating to\n * `/team/11`, the router instantiates the 'AllUsers' component.\n *\n * ```\n * [{\n *   path: 'team/:id',\n *   component: Team,\n *   children: [{\n *     path: '',\n *     component: AllUsers\n *   }, {\n *     path: 'user/:name',\n *     component: User\n *   }]\n * }]\n * ```\n *\n * Empty-path routes can have children. In the following example, when navigating\n * to `/team/11/user/jim`, the router instantiates the wrapper component with\n * the user component in it.\n *\n * Note that an empty path route inherits its parent's parameters and data.\n *\n * ```\n * [{\n *   path: 'team/:id',\n *   component: Team,\n *   children: [{\n *     path: '',\n *     component: WrapperCmp,\n *     children: [{\n *       path: 'user/:name',\n *       component: User\n *     }]\n *   }]\n * }]\n * ```\n *\n * ### Matching Strategy\n *\n * The default path-match strategy is 'prefix', which means that the router\n * checks URL elements from the left to see if the URL matches a specified path.\n * For example, '/team/11/user' matches 'team/:id'.\n *\n * ```\n * [{\n *   path: '',\n *   pathMatch: 'prefix', //default\n *   redirectTo: 'main'\n * }, {\n *   path: 'main',\n *   component: Main\n * }]\n * ```\n *\n * You can specify the path-match strategy 'full' to make sure that the path\n * covers the whole unconsumed URL. It is important to do this when redirecting\n * empty-path routes. Otherwise, because an empty path is a prefix of any URL,\n * the router would apply the redirect even when navigating to the redirect destination,\n * creating an endless loop.\n *\n * In the following example, supplying the 'full' `pathMatch` strategy ensures\n * that the router applies the redirect if and only if navigating to '/'.\n *\n * ```\n * [{\n *   path: '',\n *   pathMatch: 'full',\n *   redirectTo: 'main'\n * }, {\n *   path: 'main',\n *   component: Main\n * }]\n * ```\n *\n * ### Componentless Routes\n *\n * You can share parameters between sibling components.\n * For example, suppose that two sibling components should go next to each other,\n * and both of them require an ID parameter. You can accomplish this using a route\n * that does not specify a component at the top level.\n *\n * In the following example, 'MainChild' and 'AuxChild' are siblings.\n * When navigating to 'parent/10/(a//aux:b)', the route instantiates\n * the main child and aux child components next to each other.\n * For this to work, the application component must have the primary and aux outlets defined.\n *\n * ```\n * [{\n *    path: 'parent/:id',\n *    children: [\n *      { path: 'a', component: MainChild },\n *      { path: 'b', component: AuxChild, outlet: 'aux' }\n *    ]\n * }]\n * ```\n *\n * The router merges the parameters, data, and resolve of the componentless\n * parent into the parameters, data, and resolve of the children.\n *\n * This is especially useful when child components are defined\n * with an empty path string, as in the following example.\n * With this configuration, navigating to '/parent/10' creates\n * the main child and aux components.\n *\n * ```\n * [{\n *    path: 'parent/:id',\n *    children: [\n *      { path: '', component: MainChild },\n *      { path: '', component: AuxChild, outlet: 'aux' }\n *    ]\n * }]\n * ```\n *\n * ### Lazy Loading\n *\n * Lazy loading speeds up application load time by splitting the application\n * into multiple bundles and loading them on demand.\n * To use lazy loading, provide the `loadChildren` property  instead of the `children` property.\n *\n * Given the following example route, the router will lazy load\n * the associated module on demand using the browser native import system.\n *\n * ```\n * [{\n *   path: 'lazy',\n *   loadChildren: () => import('./lazy-route/lazy.module').then(mod => mod.LazyModule),\n * }];\n * ```\n *\n * @publicApi\n */\nexport interface Route {\n  /**\n   * The path to match against. Cannot be used together with a custom `matcher` function.\n   * A URL string that uses router matching notation.\n   * Can be a wild card (`**`) that matches any URL (see Usage Notes below).\n   * Default is \"/\" (the root path).\n   *\n   */\n  path?: string;\n  /**\n   * The path-matching strategy, one of 'prefix' or 'full'.\n   * Default is 'prefix'.\n   *\n   * By default, the router checks URL elements from the left to see if the URL\n   * matches a given  path, and stops when there is a match. For example,\n   * '/team/11/user' matches 'team/:id'.\n   *\n   * The path-match strategy 'full' matches against the entire URL.\n   * It is important to do this when redirecting empty-path routes.\n   * Otherwise, because an empty path is a prefix of any URL,\n   * the router would apply the redirect even when navigating\n   * to the redirect destination, creating an endless loop.\n   *\n   */\n  pathMatch?: string;\n  /**\n   * A custom URL-matching function. Cannot be used together with `path`.\n   */\n  matcher?: UrlMatcher;\n  /**\n   * The component to instantiate when the path matches.\n   * Can be empty if child routes specify components.\n   */\n  component?: Type<any>;\n  /**\n   * A URL to redirect to when the path matches.\n   * Absolute if the URL begins with a slash (/), otherwise relative to the path URL.\n   * When not present, router does not redirect.\n   */\n  redirectTo?: string;\n  /**\n   * Name of a `RouterOutlet` object where the component can be placed\n   * when the path matches.\n   */\n  outlet?: string;\n  /**\n   * An array of dependency-injection tokens used to look up `CanActivate()`\n   * handlers, in order to determine if the current user is allowed to\n   * activate the component. By default, any user can activate.\n   */\n  canActivate?: any[];\n  /**\n   * An array of DI tokens used to look up `CanActivateChild()` handlers,\n   * in order to determine if the current user is allowed to activate\n   * a child of the component. By default, any user can activate a child.\n   */\n  canActivateChild?: any[];\n  /**\n   * An array of DI tokens used to look up `CanDeactivate()`\n   * handlers, in order to determine if the current user is allowed to\n   * deactivate the component. By default, any user can deactivate.\n   *\n   */\n  canDeactivate?: any[];\n  /**\n   * An array of DI tokens used to look up `CanLoad()`\n   * handlers, in order to determine if the current user is allowed to\n   * load the component. By default, any user can load.\n   */\n  canLoad?: any[];\n  /**\n   * Additional developer-defined data provided to the component via\n   * `ActivatedRoute`. By default, no additional data is passed.\n   */\n  data?: Data;\n  /**\n   * A map of DI tokens used to look up data resolvers. See `Resolve`.\n   */\n  resolve?: ResolveData;\n  /**\n   * An array of child `Route` objects that specifies a nested route\n   * configuration.\n   */\n  children?: Routes;\n  /**\n   * A `LoadChildren` object specifying lazy-loaded child routes.\n   */\n  loadChildren?: LoadChildren;\n  /**\n   * Defines when guards and resolvers will be run. One of\n   * - `paramsOrQueryParamsChange` : Run when query parameters change.\n   * - `always` : Run on every execution.\n   * By default, guards and resolvers run only when the matrix\n   * parameters of the route change.\n   */\n  runGuardsAndResolvers?: RunGuardsAndResolvers;\n  /**\n   * Filled for routes with `loadChildren` once the module has been loaded\n   * @internal\n   */\n  _loadedConfig?: LoadedRouterConfig;\n}\n\nexport class LoadedRouterConfig {\n  constructor(public routes: Route[], public module: NgModuleRef<any>) {}\n}\n\nexport function validateConfig(config: Routes, parentPath: string = ''): void {\n  // forEach doesn't iterate undefined values\n  for (let i = 0; i < config.length; i++) {\n    const route: Route = config[i];\n    const fullPath: string = getFullPath(parentPath, route);\n    validateNode(route, fullPath);\n  }\n}\n\nfunction validateNode(route: Route, fullPath: string): void {\n  if (!route) {\n    throw new Error(`\n      Invalid configuration of route '${fullPath}': Encountered undefined route.\n      The reason might be an extra comma.\n\n      Example:\n      const routes: Routes = [\n        { path: '', redirectTo: '/dashboard', pathMatch: 'full' },\n        { path: 'dashboard',  component: DashboardComponent },, << two commas\n        { path: 'detail/:id', component: HeroDetailComponent }\n      ];\n    `);\n  }\n  if (Array.isArray(route)) {\n    throw new Error(`Invalid configuration of route '${fullPath}': Array cannot be specified`);\n  }\n  if (!route.component && !route.children && !route.loadChildren &&\n      (route.outlet && route.outlet !== PRIMARY_OUTLET)) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': a componentless route without children or loadChildren cannot have a named outlet set`);\n  }\n  if (route.redirectTo && route.children) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': redirectTo and children cannot be used together`);\n  }\n  if (route.redirectTo && route.loadChildren) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': redirectTo and loadChildren cannot be used together`);\n  }\n  if (route.children && route.loadChildren) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': children and loadChildren cannot be used together`);\n  }\n  if (route.redirectTo && route.component) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': redirectTo and component cannot be used together`);\n  }\n  if (route.path && route.matcher) {\n    throw new Error(\n        `Invalid configuration of route '${fullPath}': path and matcher cannot be used together`);\n  }\n  if (route.redirectTo === void 0 && !route.component && !route.children && !route.loadChildren) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}'. One of the following must be provided: component, redirectTo, children or loadChildren`);\n  }\n  if (route.path === void 0 && route.matcher === void 0) {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': routes must have either a path or a matcher specified`);\n  }\n  if (typeof route.path === 'string' && route.path.charAt(0) === '/') {\n    throw new Error(`Invalid configuration of route '${fullPath}': path cannot start with a slash`);\n  }\n  if (route.path === '' && route.redirectTo !== void 0 && route.pathMatch === void 0) {\n    const exp =\n        `The default value of 'pathMatch' is 'prefix', but often the intent is to use 'full'.`;\n    throw new Error(`Invalid configuration of route '{path: \"${fullPath}\", redirectTo: \"${\n        route.redirectTo}\"}': please provide 'pathMatch'. ${exp}`);\n  }\n  if (route.pathMatch !== void 0 && route.pathMatch !== 'full' && route.pathMatch !== 'prefix') {\n    throw new Error(`Invalid configuration of route '${\n        fullPath}': pathMatch can only be set to 'prefix' or 'full'`);\n  }\n  if (route.children) {\n    validateConfig(route.children, fullPath);\n  }\n}\n\nfunction getFullPath(parentPath: string, currentRoute: Route): string {\n  if (!currentRoute) {\n    return parentPath;\n  }\n  if (!parentPath && !currentRoute.path) {\n    return '';\n  } else if (parentPath && !currentRoute.path) {\n    return `${parentPath}/`;\n  } else if (!parentPath && currentRoute.path) {\n    return currentRoute.path;\n  } else {\n    return `${parentPath}/${currentRoute.path}`;\n  }\n}\n\n/**\n * Makes a copy of the config and adds any default required properties.\n */\nexport function standardizeConfig(r: Route): Route {\n  const children = r.children && r.children.map(standardizeConfig);\n  const c = children ? {...r, children} : {...r};\n  if (!c.component && (children || c.loadChildren) && (c.outlet && c.outlet !== PRIMARY_OUTLET)) {\n    c.component = EmptyOutletComponent;\n  }\n  return c;\n}\n"]}