ima/router/AbstractRouter.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _Events = require('./Events');

var _Events2 = _interopRequireDefault(_Events);

var _Router = require('./Router');

var _Router2 = _interopRequireDefault(_Router);

var _RouteNames = require('./RouteNames');

var _RouteNames2 = _interopRequireDefault(_RouteNames);

var _GenericError = require('../error/GenericError');

var _GenericError2 = _interopRequireDefault(_GenericError);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * The basic implementation of the {@codelink Router} interface, providing the
 * common or default functionality for parts of the API.
 *
 * @abstract
 */
class AbstractRouter extends _Router2.default {
  /**
   * Initializes the router.
   *
   * @param {PageManager} pageManager The page manager handling UI rendering,
   *        and transitions between pages if at the client side.
   * @param {RouteFactory} factory Factory for routes.
   * @param {Dispatcher} dispatcher Dispatcher fires events to app.
   * @example
   *      router.link('article', {articleId: 1});
   * @example
   *      router.redirect('http://www.example.com/web');
   * @example
   *      router.add(
   *        'home',
   *        '/',
   *        ns.app.page.home.Controller,
   *        ns.app.page.home.View,
   *        {
   *          onlyUpdate: false,
   *          autoScroll: true,
   *          allowSPA: true,
   *          documentView: null,
   *          managedRootView: null,
   *          viewAdapter: null
   *        }
   *      );
   */
  constructor(pageManager, factory, dispatcher) {
    super();

    /**
     * The page manager handling UI rendering, and transitions between
     * pages if at the client side.
     *
     * @type {PageManager}
     */
    this._pageManager = pageManager;

    /**
     * Factory for routes.
     *
     * @type {RouteFactory}
     */
    this._factory = factory;

    /**
     * Dispatcher fires events to app.
     *
     * @type {Dispatcher}
     */
    this._dispatcher = dispatcher;

    /**
     * The current protocol used to access the application, terminated by a
     * colon (for example {@code https:}).
     *
     * @type {string}
     */
    this._protocol = '';

    /**
     * The application's host.
     *
     * @type {string}
     */
    this._host = '';

    /**
     * The URL path pointing to the application's root.
     *
     * @type {string}
     */
    this._root = '';

    /**
     * The URL path fragment used as a suffix to the {@code _root} field
     * that specifies the current language.
     *
     * @type {string}
     */
    this._languagePartPath = '';

    /**
     * Storage of all known routes. The key are the route names.
     *
     * @type {Map<string, Route>}
     */
    this._routes = new Map();
  }

  /**
   * @inheritdoc
   */
  init(config) {
    this._protocol = config.$Protocol || '';
    this._root = config.$Root || '';
    this._languagePartPath = config.$LanguagePartPath || '';
    this._host = config.$Host;
  }

  /**
   * @inheritdoc
   */
  add(name, pathExpression, controller, view, options = undefined) {
    if (this._routes.has(name)) {
      throw new _GenericError2.default(`ima.router.AbstractRouter.add: The route with name ${name} ` + `is already defined`);
    }

    let factory = this._factory;
    let route = factory.createRoute(name, pathExpression, controller, view, options);
    this._routes.set(name, route);

    return this;
  }

  /**
   * @inheritdoc
   */
  remove(name) {
    this._routes.delete(name);

    return this;
  }

  /**
   * @inheritdoc
   */
  getPath() {
    throw new _GenericError2.default('The getPath() method is abstract and must be overridden.');
  }

  /**
   * @inheritdoc
   */
  getUrl() {
    return this.getBaseUrl() + this.getPath();
  }

  /**
   * @inheritdoc
   */
  getBaseUrl() {
    return this.getDomain() + this._root + this._languagePartPath;
  }

  /**
   * @inheritdoc
   */
  getDomain() {
    return this._protocol + '//' + this._host;
  }

  /**
   * @inheritdoc
   */
  getHost() {
    return this._host;
  }

  /**
   * @inheritdoc
   */
  getProtocol() {
    return this._protocol;
  }

  /**
   * @inheritdoc
   */
  getCurrentRouteInfo() {
    let path = this.getPath();
    let route = this._getRouteByPath(path);

    if (!route) {
      throw new _GenericError2.default(`ima.router.AbstractRouter.getCurrentRouteInfo: The route ` + `for path ${path} is not defined.`);
    }

    let params = route.extractParameters(path);

    return { route, params, path };
  }

  /**
   * @inheritdoc
   * @abstract
   */
  listen() {
    throw new _GenericError2.default('The listen() method is abstract and must be overridden.');
  }

  /**
   * @inheritdoc
   * @abstract
   */
  redirect() {
    throw new _GenericError2.default('The redirect() method is abstract and must be overridden.');
  }

  /**
   * @inheritdoc
   */
  link(routeName, params) {
    let route = this._routes.get(routeName);

    if (!route) {
      throw new _GenericError2.default(`ima.router.AbstractRouter:link has undefined route with ` + `name ${routeName}. Add new route with that name.`);
    }

    return this.getBaseUrl() + route.toPath(params);
  }

  /**
   * @inheritdoc
   */
  route(path, options = {}) {
    let routeForPath = this._getRouteByPath(path);
    let params = {};

    if (!routeForPath) {
      params.error = new _GenericError2.default(`Route for path '${path}' is not configured.`, { status: 404 });

      return this.handleNotFound(params);
    }

    params = routeForPath.extractParameters(path);

    return this._handle(routeForPath, params, options);
  }

  /**
   * @inheritdoc
   */
  handleError(params, options = {}) {
    let routeError = this._routes.get(_RouteNames2.default.ERROR);

    if (!routeError) {
      let error = new _GenericError2.default(`ima.router.AbstractRouter:handleError cannot process the ` + `error because no error page route has been configured. Add ` + `a new route named '${_RouteNames2.default.ERROR}'.`, params);

      return Promise.reject(error);
    }

    return this._handle(routeError, params, options);
  }

  /**
   * @inheritdoc
   */
  handleNotFound(params, options = {}) {
    let routeNotFound = this._routes.get(_RouteNames2.default.NOT_FOUND);

    if (!routeNotFound) {
      let error = new _GenericError2.default(`ima.router.AbstractRouter:handleNotFound cannot processes ` + `a non-matching route because no not found page route has ` + `been configured. Add new route named ` + `'${_RouteNames2.default.NOT_FOUND}'.`, params);

      return Promise.reject(error);
    }

    return this._handle(routeNotFound, params, options);
  }

  /**
   * @inheritdoc
   */
  isClientError(reason) {
    return reason instanceof _GenericError2.default && reason.getHttpStatus() >= 400 && reason.getHttpStatus() < 500;
  }

  /**
   * @inheritdoc
   */
  isRedirection(reason) {
    return reason instanceof _GenericError2.default && reason.getHttpStatus() >= 300 && reason.getHttpStatus() < 400;
  }

  /**
   * Strips the URL path part that points to the application's root (base
   * URL) from the provided path.
   *
   * @protected
   * @param {string} path Relative or absolute URL path.
   * @return {string} URL path relative to the application's base URL.
   */
  _extractRoutePath(path) {
    return path.replace(this._root + this._languagePartPath, '');
  }

  /**
   * Handles the provided route and parameters by initializing the route's
   * controller and rendering its state via the route's view.
   *
   * The result is then sent to the client if used at the server side, or
   * displayed if used as the client side.
   *
   * @param {Route} route The route that should have its
   *        associated controller rendered via the associated view.
   * @param {Object<string, (Error|string)>} params Parameters extracted from
   *        the URL path and query.
   * @param {{
   *          onlyUpdate: (
   *            boolean|
   *            function(
   *              (string|function(new: Controller, ...*)),
   *              (string|function(
   *                new: React.Component,
   *                Object<string, *>,
   *                ?Object<string, *>
   *              ))
   *            ): boolean
   *          )=,
   *          autoScroll: boolean=,
   *          allowSPA: boolean=,
   *          documentView: ?AbstractDocumentView=,
   *          managedRootView: ?function(new: React.Component)=,
   *          viewAdapter: ?function(new: React.Component)=
   *        }} options The options overrides route options defined in the
   *        {@code routes.js} configuration file.
   * @return {Promise<Object<string, *>>} A promise that resolves when the
   *         page is rendered and the result is sent to the client, or
   *         displayed if used at the client side.
   */
  _handle(route, params, options) {
    let controller = route.getController();
    let view = route.getView();
    options = Object.assign({}, route.getOptions(), options);
    let data = { route, params, path: this.getPath(), options };

    this._dispatcher.fire(_Events2.default.BEFORE_HANDLE_ROUTE, data, true);

    return this._pageManager.manage(controller, view, options, params).then(response => {
      response = response || {};

      if (params.error && params.error instanceof Error) {
        response.error = params.error;
      }

      data.response = response;

      this._dispatcher.fire(_Events2.default.AFTER_HANDLE_ROUTE, data, true);

      return response;
    });
  }

  /**
   * Returns the route matching the provided URL path part. The path may
   * contain a query.
   *
   * @param {string} path The URL path.
   * @return {?Route} The route matching the path, or {@code null} if no such
   *         route exists.
   */
  _getRouteByPath(path) {
    for (let route of this._routes.values()) {
      if (route.matches(path)) {
        return route;
      }
    }

    return null;
  }
}
exports.default = AbstractRouter;

typeof $IMA !== 'undefined' && $IMA !== null && $IMA.Loader && $IMA.Loader.register('ima/router/AbstractRouter', [], function (_export, _context) {
 'use strict';
 return {
   setters: [],
   execute: function () {
     _export('default', exports.default);
   }
 };
});