angular2
Version:
Angular 2 - a web framework for modern web apps
75 lines • 11.3 kB
JavaScript
import { RouteSegment, Tree } from './segments';
import { RoutesMetadata } from './metadata/metadata';
import { isPresent, stringify } from 'angular2/src/facade/lang';
import { PromiseWrapper } from 'angular2/src/facade/promise';
import { BaseException } from 'angular2/src/facade/exceptions';
import { reflector } from 'angular2/src/core/reflection/reflection';
export function recognize(componentResolver, type, url) {
return _recognize(componentResolver, type, url, url.root)
.then(nodes => new Tree(nodes));
}
function _recognize(componentResolver, type, url, current) {
let metadata = _readMetadata(type); // should read from the factory instead
let matched;
try {
matched = _match(metadata, url, current);
}
catch (e) {
return PromiseWrapper.reject(e, null);
}
return componentResolver.resolveComponent(matched.route.component)
.then(factory => {
let segment = new RouteSegment(matched.consumedUrlSegments, matched.parameters, "", matched.route.component, factory);
if (isPresent(matched.leftOver)) {
return _recognize(componentResolver, matched.route.component, url, matched.leftOver)
.then(children => [segment].concat(children));
}
else {
return [segment];
}
});
}
function _match(metadata, url, current) {
for (let r of metadata.routes) {
let matchingResult = _matchWithParts(r, url, current);
if (isPresent(matchingResult)) {
return matchingResult;
}
}
throw new BaseException("Cannot match any routes");
}
function _matchWithParts(route, url, current) {
let parts = route.path.split("/");
let parameters = {};
let consumedUrlSegments = [];
let u = current;
for (let i = 0; i < parts.length; ++i) {
consumedUrlSegments.push(u);
let p = parts[i];
if (p.startsWith(":")) {
let segment = u.segment;
parameters[p.substring(1)] = segment;
}
else if (p != u.segment) {
return null;
}
u = url.firstChild(u);
}
return new _MatchingResult(route, consumedUrlSegments, parameters, u);
}
class _MatchingResult {
constructor(route, consumedUrlSegments, parameters, leftOver) {
this.route = route;
this.consumedUrlSegments = consumedUrlSegments;
this.parameters = parameters;
this.leftOver = leftOver;
}
}
function _readMetadata(componentType) {
let metadata = reflector.annotations(componentType).filter(f => f instanceof RoutesMetadata);
if (metadata.length === 0) {
throw new BaseException(`Component '${stringify(componentType)}' does not have route configuration`);
}
return metadata[0];
}
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 // should read from the factory instead\n\n  let matched;\n  try {\n    matched = _match(metadata, url, current);\n  } catch (e) {\n    return PromiseWrapper.reject(e, null);\n  }\n\n  return componentResolver.resolveComponent(matched.route.component)\n      .then(factory => {\n        let segment = new RouteSegment(matched.consumedUrlSegments, matched.parameters, \"\",\n                                       matched.route.component, factory);\n\n        if (isPresent(matched.leftOver)) {\n          return _recognize(componentResolver, matched.route.component, url, matched.leftOver)\n              .then(children => [segment].concat(children));\n        } else {\n          return [segment];\n        }\n      });\n}\n\nfunction _match(metadata: RoutesMetadata, url: Tree<UrlSegment>,\n                current: UrlSegment): _MatchingResult {\n  for (let r of metadata.routes) {\n    let matchingResult = _matchWithParts(r, url, current);\n    if (isPresent(matchingResult)) {\n      return matchingResult;\n    }\n  }\n  throw new BaseException(\"Cannot match any routes\");\n}\n\nfunction _matchWithParts(route: RouteMetadata, url: Tree<UrlSegment>,\n                         current: UrlSegment): _MatchingResult {\n  let parts = route.path.split(\"/\");\n  let parameters = {};\n  let consumedUrlSegments = [];\n\n  let u = current;\n  for (let i = 0; i < parts.length; ++i) {\n    consumedUrlSegments.push(u);\n    let p = parts[i];\n    if (p.startsWith(\":\")) {\n      let segment = u.segment;\n      parameters[p.substring(1)] = segment;\n    } else if (p != u.segment) {\n      return null;\n    }\n    u = url.firstChild(u);\n  }\n  return new _MatchingResult(route, consumedUrlSegments, parameters, u);\n}\n\nclass _MatchingResult {\n  constructor(public route: RouteMetadata, public consumedUrlSegments: UrlSegment[],\n              public parameters: {[key: string]: string}, public leftOver: UrlSegment) {}\n}\n\nfunction _readMetadata(componentType: Type) {\n  let metadata = reflector.annotations(componentType).filter(f => f instanceof RoutesMetadata);\n  if (metadata.length === 0) {\n    throw new BaseException(\n        `Component '${stringify(componentType)}' does not have route configuration`);\n  }\n  return metadata[0];\n}"]}