angular2
Version:
Angular 2 - a web framework for modern web apps
90 lines • 14.7 kB
JavaScript
import { isPresent, isBlank } from 'angular2/src/facade/lang';
import { BaseException } from 'angular2/src/facade/exceptions';
import { PromiseWrapper } from 'angular2/src/facade/promise';
import { Map } from 'angular2/src/facade/collection';
import { ComponentInstruction } from './instruction';
import { PathRecognizer } from './path_recognizer';
export class RouteMatch {
}
export class PathMatch extends RouteMatch {
constructor(instruction, remaining, remainingAux) {
super();
this.instruction = instruction;
this.remaining = remaining;
this.remainingAux = remainingAux;
}
}
export class RedirectMatch extends RouteMatch {
constructor(redirectTo, specificity) {
super();
this.redirectTo = redirectTo;
this.specificity = specificity;
}
}
export class RedirectRecognizer {
constructor(path, redirectTo) {
this.path = path;
this.redirectTo = redirectTo;
this._pathRecognizer = new PathRecognizer(path);
this.hash = this._pathRecognizer.hash;
}
/**
* Returns `null` or a `ParsedUrl` representing the new path to match
*/
recognize(beginningSegment) {
var match = null;
if (isPresent(this._pathRecognizer.recognize(beginningSegment))) {
match = new RedirectMatch(this.redirectTo, this._pathRecognizer.specificity);
}
return PromiseWrapper.resolve(match);
}
generate(params) {
throw new BaseException(`Tried to generate a redirect.`);
}
}
// represents something like '/foo/:bar'
export class RouteRecognizer {
// TODO: cache component instruction instances by params and by ParsedUrl instance
constructor(path, handler) {
this.path = path;
this.handler = handler;
this.terminal = true;
this._cache = new Map();
this._pathRecognizer = new PathRecognizer(path);
this.specificity = this._pathRecognizer.specificity;
this.hash = this._pathRecognizer.hash;
this.terminal = this._pathRecognizer.terminal;
}
recognize(beginningSegment) {
var res = this._pathRecognizer.recognize(beginningSegment);
if (isBlank(res)) {
return null;
}
return this.handler.resolveComponentType().then((_) => {
var componentInstruction = this._getInstruction(res['urlPath'], res['urlParams'], res['allParams']);
return new PathMatch(componentInstruction, res['nextSegment'], res['auxiliary']);
});
}
generate(params) {
var generated = this._pathRecognizer.generate(params);
var urlPath = generated['urlPath'];
var urlParams = generated['urlParams'];
return this._getInstruction(urlPath, urlParams, params);
}
generateComponentPathValues(params) {
return this._pathRecognizer.generate(params);
}
_getInstruction(urlPath, urlParams, params) {
if (isBlank(this.handler.componentType)) {
throw new BaseException(`Tried to get instruction before the type was loaded.`);
}
var hashKey = urlPath + '?' + urlParams.join('?');
if (this._cache.has(hashKey)) {
return this._cache.get(hashKey);
}
var instruction = new ComponentInstruction(urlPath, urlParams, this.handler.data, this.handler.componentType, this.terminal, this.specificity, params);
this._cache.set(hashKey, instruction);
return instruction;
}
}
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{isPresent, isBlank} from 'angular2/src/facade/lang';\nimport {BaseException} from 'angular2/src/facade/exceptions';\nimport {PromiseWrapper, Promise} from 'angular2/src/facade/promise';\nimport {Map} from 'angular2/src/facade/collection';\n\nimport {RouteHandler} from './route_handler';\nimport {Url} from './url_parser';\nimport {ComponentInstruction} from './instruction';\nimport {PathRecognizer} from './path_recognizer';\n\n\nexport abstract class RouteMatch {}\n\nexport interface AbstractRecognizer {\n  hash: string;\n  path: string;\n  recognize(beginningSegment: Url): Promise<RouteMatch>;\n  generate(params: {[key: string]: any}): ComponentInstruction;\n}\n\n\nexport class PathMatch extends RouteMatch {\n  constructor(public instruction: ComponentInstruction, public remaining: Url,\n              public remainingAux: Url[]) {\n    super();\n  }\n}\n\n\nexport class RedirectMatch extends RouteMatch {\n  constructor(public redirectTo: any[], public specificity) { super(); }\n}\n\nexport class RedirectRecognizer implements AbstractRecognizer {\n  private _pathRecognizer: PathRecognizer;\n  public hash: string;\n\n  constructor(public path: string, public redirectTo: any[]) {\n    this._pathRecognizer = new PathRecognizer(path);\n    this.hash = this._pathRecognizer.hash;\n  }\n\n  /**\n   * Returns `null` or a `ParsedUrl` representing the new path to match\n   */\n  recognize(beginningSegment: Url): Promise<RouteMatch> {\n    var match = null;\n    if (isPresent(this._pathRecognizer.recognize(beginningSegment))) {\n      match = new RedirectMatch(this.redirectTo, this._pathRecognizer.specificity);\n    }\n    return PromiseWrapper.resolve(match);\n  }\n\n  generate(params: {[key: string]: any}): ComponentInstruction {\n    throw new BaseException(`Tried to generate a redirect.`);\n  }\n}\n\n\n// represents something like '/foo/:bar'\nexport class RouteRecognizer implements AbstractRecognizer {\n  specificity: number;\n  terminal: boolean = true;\n  hash: string;\n\n  private _cache: Map<string, ComponentInstruction> = new Map<string, ComponentInstruction>();\n  private _pathRecognizer: PathRecognizer;\n\n  // TODO: cache component instruction instances by params and by ParsedUrl instance\n\n  constructor(public path: string, public handler: RouteHandler) {\n    this._pathRecognizer = new PathRecognizer(path);\n    this.specificity = this._pathRecognizer.specificity;\n    this.hash = this._pathRecognizer.hash;\n    this.terminal = this._pathRecognizer.terminal;\n  }\n\n  recognize(beginningSegment: Url): Promise<RouteMatch> {\n    var res = this._pathRecognizer.recognize(beginningSegment);\n    if (isBlank(res)) {\n      return null;\n    }\n\n    return this.handler.resolveComponentType().then((_) => {\n      var componentInstruction =\n          this._getInstruction(res['urlPath'], res['urlParams'], res['allParams']);\n      return new PathMatch(componentInstruction, res['nextSegment'], res['auxiliary']);\n    });\n  }\n\n  generate(params: {[key: string]: any}): ComponentInstruction {\n    var generated = this._pathRecognizer.generate(params);\n    var urlPath = generated['urlPath'];\n    var urlParams = generated['urlParams'];\n    return this._getInstruction(urlPath, urlParams, params);\n  }\n\n  generateComponentPathValues(params: {[key: string]: any}): {[key: string]: any} {\n    return this._pathRecognizer.generate(params);\n  }\n\n  private _getInstruction(urlPath: string, urlParams: string[],\n                          params: {[key: string]: any}): ComponentInstruction {\n    if (isBlank(this.handler.componentType)) {\n      throw new BaseException(`Tried to get instruction before the type was loaded.`);\n    }\n\n    var hashKey = urlPath + '?' + urlParams.join('?');\n    if (this._cache.has(hashKey)) {\n      return this._cache.get(hashKey);\n    }\n    var instruction =\n        new ComponentInstruction(urlPath, urlParams, this.handler.data, this.handler.componentType,\n                                 this.terminal, this.specificity, params);\n    this._cache.set(hashKey, instruction);\n\n    return instruction;\n  }\n}\n"]}