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import * as utils from './util';
import * as service from './service';
import * as models from 'powerbi-models';
import * as hpm from 'http-post-message';
declare global {
interface Document {
// Mozilla Fullscreen
mozCancelFullScreen: Function;
// Ms Fullscreen
msExitFullscreen: Function;
}
interface HTMLIFrameElement {
// Mozilla Fullscreen
mozRequestFullScreen: Function;
// Ms Fullscreen
msRequestFullscreen: Function;
}
}
// TODO: Re-use ILoadConfiguration interface to prevent duplicating properties.
// Current issue is that they are optional when embedding since they can be specificed as attributes but they are required when loading.
/**
* Configuration settings for Power BI embed components
*
* @export
* @interface IEmbedConfiguration
*/
export interface IEmbedConfiguration {
type?: string;
id?: string;
uniqueId?: string;
embedUrl?: string;
accessToken?: string;
settings?: models.ISettings;
pageName?: string;
filters?: models.IFilter[];
}
export interface IInternalEmbedConfiguration extends models.ILoadConfiguration {
uniqueId: string;
type: string;
embedUrl: string;
}
export interface IInternalEventHandler<T> {
test(event: service.IEvent<T>): boolean;
handle(event: service.ICustomEvent<T>): void;
}
/**
* Base class for all Power BI embed components
*
* @export
* @abstract
* @class Embed
*/
export abstract class Embed {
static allowedEvents = ["loaded"];
static accessTokenAttribute = 'powerbi-access-token';
static embedUrlAttribute = 'powerbi-embed-url';
static nameAttribute = 'powerbi-name';
static typeAttribute = 'powerbi-type';
static type: string;
private static defaultSettings: models.ISettings = {
filterPaneEnabled: true
};
allowedEvents = [];
/**
* Gets or sets the event handler registered for this embed component.
*
* @type {IInternalEventHandler<any>[]}
*/
eventHandlers: IInternalEventHandler<any>[];
/**
* Gets or sets the Power BI embed service.
*
* @type {service.Service}
*/
service: service.Service;
/**
* Gets or sets the HTML element that contains the Power BI embed component.
*
* @type {HTMLElement}
*/
element: HTMLElement;
/**
* Gets or sets the HTML iframe element that renders the Power BI embed component.
*
* @type {HTMLIFrameElement}
*/
iframe: HTMLIFrameElement;
/**
* Gets or sets the configuration settings for the Power BI embed component.
*
* @type {IInternalEmbedConfiguration}
*/
config: IInternalEmbedConfiguration;
/**
* Creates an instance of Embed.
*
* Note: there is circular reference between embeds and the service, because
* the service has a list of all embeds on the host page, and each embed has a reference to the service that created it.
*
* @param {service.Service} service
* @param {HTMLElement} element
* @param {IEmbedConfiguration} config
*/
constructor(service: service.Service, element: HTMLElement, config: IEmbedConfiguration) {
Array.prototype.push.apply(this.allowedEvents, Embed.allowedEvents);
this.eventHandlers = [];
this.service = service;
this.element = element;
// TODO: Change when Object.assign is available.
const settings = utils.assign({}, Embed.defaultSettings, config.settings);
this.config = utils.assign({ settings }, config);
this.config.accessToken = this.getAccessToken(service.accessToken);
this.config.embedUrl = this.getEmbedUrl();
this.config.id = this.getId();
this.config.uniqueId = this.getUniqueId();
const iframeHtml = `<iframe style="width:100%;height:100%;" src="${this.config.embedUrl}" scrolling="no" allowfullscreen="true"></iframe>`;
this.element.innerHTML = iframeHtml;
this.iframe = <HTMLIFrameElement>this.element.childNodes[0];
this.iframe.addEventListener('load', () => this.load(this.config), false);
}
/**
* Sends load configuration data.
*
* ```javascript
* report.load({
* type: 'report',
* id: '5dac7a4a-4452-46b3-99f6-a25915e0fe55',
* accessToken: 'eyJ0eXA ... TaE2rTSbmg',
* settings: {
* navContentPaneEnabled: false
* },
* pageName: "DefaultPage",
* filters: [
* {
* ... DefaultReportFilter ...
* }
* ]
* })
* .catch(error => { ... });
* ```
*
* @param {models.ILoadConfiguration} config
* @returns {Promise<void>}
*/
load(config: models.ILoadConfiguration): Promise<void> {
const errors = models.validateLoad(config);
if (errors) {
throw errors;
}
return this.service.hpm.post<void>('/report/load', config, { uid: this.config.uniqueId }, this.iframe.contentWindow)
.then(response => {
utils.assign(this.config, config);
return response.body;
},
response => {
throw response.body;
});
}
/**
* Removes one or more event handlers from the list of handlers.
* If a reference to the existing handle function is specified, remove the specific handler.
* If the handler is not specified, remove all handlers for the event name specified.
*
* ```javascript
* report.off('pageChanged')
*
* or
*
* const logHandler = function (event) {
* console.log(event);
* };
*
* report.off('pageChanged', logHandler);
* ```
*
* @template T
* @param {string} eventName
* @param {service.IEventHandler<T>} [handler]
*/
off<T>(eventName: string, handler?: service.IEventHandler<T>): void {
const fakeEvent: service.IEvent<any> = { name: eventName, type: null, id: null, value: null };
if (handler) {
utils.remove(eventHandler => eventHandler.test(fakeEvent) && (eventHandler.handle === handler), this.eventHandlers);
this.element.removeEventListener(eventName, <any>handler);
}
else {
const eventHandlersToRemove = this.eventHandlers
.filter(eventHandler => eventHandler.test(fakeEvent));
eventHandlersToRemove
.forEach(eventHandlerToRemove => {
utils.remove(eventHandler => eventHandler === eventHandlerToRemove, this.eventHandlers);
this.element.removeEventListener(eventName, <any>eventHandlerToRemove.handle);
});
}
}
/**
* Adds an event handler for a specific event.
*
* ```javascript
* report.on('pageChanged', (event) => {
* console.log('PageChanged: ', event.page.name);
* });
* ```
*
* @template T
* @param {string} eventName
* @param {service.IEventHandler<T>} handler
*/
on<T>(eventName: string, handler: service.IEventHandler<T>): void {
if (this.allowedEvents.indexOf(eventName) === -1) {
throw new Error(`eventName is must be one of ${this.allowedEvents}. You passed: ${eventName}`);
}
this.eventHandlers.push({
test: (event: service.IEvent<T>) => event.name === eventName,
handle: handler
});
this.element.addEventListener(eventName, <any>handler)
}
/**
* Reloads embed using existing configuration.
* E.g. For reports this effectively clears all filters and makes the first page active which simulates resetting a report back to loaded state.
*
* ```javascript
* report.reload();
* ```
*/
reload(): Promise<void> {
return this.load(this.config);
}
/**
* Gets an access token from the first available location: config, attribute, global.
*
* @private
* @param {string} globalAccessToken
* @returns {string}
*/
private getAccessToken(globalAccessToken: string): string {
const accessToken = this.config.accessToken || this.element.getAttribute(Embed.accessTokenAttribute) || globalAccessToken;
if (!accessToken) {
throw new Error(`No access token was found for element. You must specify an access token directly on the element using attribute '${Embed.accessTokenAttribute}' or specify a global token at: powerbi.accessToken.`);
}
return accessToken;
}
/**
* Gets an embed url from the first available location: options, attribute.
*
* @private
* @returns {string}
*/
private getEmbedUrl(): string {
const embedUrl = this.config.embedUrl || this.element.getAttribute(Embed.embedUrlAttribute);
if (typeof embedUrl !== 'string' || embedUrl.length === 0) {
throw new Error(`Embed Url is required, but it was not found. You must provide an embed url either as part of embed configuration or as attribute '${Embed.embedUrlAttribute}'.`);
}
return embedUrl;
}
/**
* Gets a unique ID from the first available location: options, attribute.
* If neither is provided generate a unique string.
*
* @private
* @returns {string}
*/
private getUniqueId(): string {
return this.config.uniqueId || this.element.getAttribute(Embed.nameAttribute) || utils.createRandomString();
}
/**
* Gets the report ID from the first available location: options, attribute.
*
* @abstract
* @returns {string}
*/
abstract getId(): string;
/**
* Requests the browser to render the component's iframe in fullscreen mode.
*/
fullscreen(): void {
const requestFullScreen = this.iframe.requestFullscreen || this.iframe.msRequestFullscreen || this.iframe.mozRequestFullScreen || this.iframe.webkitRequestFullscreen;
requestFullScreen.call(this.iframe);
}
/**
* Requests the browser to exit fullscreen mode.
*/
exitFullscreen(): void {
if (!this.isFullscreen(this.iframe)) {
return;
}
const exitFullscreen = document.exitFullscreen || document.mozCancelFullScreen || document.webkitExitFullscreen || document.msExitFullscreen;
exitFullscreen.call(document);
}
/**
* Returns true if the iframe is rendered in fullscreen mode,
* otherwise returns false.
*
* @private
* @param {HTMLIFrameElement} iframe
* @returns {boolean}
*/
private isFullscreen(iframe: HTMLIFrameElement): boolean {
const options = ['fullscreenElement', 'webkitFullscreenElement', 'mozFullscreenScreenElement', 'msFullscreenElement'];
return options.some(option => document[option] === iframe);
}
}
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