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import * as service from './service';

import * as models from 'powerbi-models';

import * as embed from './embed';

import * as utils from './util';

/**

* The Power BI tile embed component

*

* @export

* @class Tile

* @extends {Embed}

*/

export class Tile extends embed.Embed {

static type = "Tile";

static allowedEvents = ["tileClicked", "tileLoaded"];

constructor(service: service.Service, element: HTMLElement, config: embed.IEmbedConfiguration) {

config.embedUrl = utils.addParamToUrl(config.embedUrl, 'dashboardId', config.dashboardId);

config.embedUrl = utils.addParamToUrl(config.embedUrl, 'tileId', config.id);

super(service, element, config);

Array.prototype.push.apply(this.allowedEvents, Tile.allowedEvents);

window.addEventListener("message", this.receiveMessage.bind(this), false);

}

/**

* The ID of the tile

*

* @returns {string}

*/

getId(): string {

const tileId = this.config.id || Tile.findIdFromEmbedUrl(this.config.embedUrl);

if (typeof tileId !== 'string' || tileId.length === 0) {

throw new Error(`Tile id is required, but it was not found. You must provide an id either as part of embed configuration.`);

}

return tileId;

}

/**

* Validate load configuration.

*/

validate(config: models.IReportLoadConfiguration): models.IError[] {

// we create load tile configuration from report load configuration

// so we need to validate it

return models.validateReportLoad(config);

}

/**

* Sends load configuration data for tile

*

* @param {models.ILoadConfiguration} config

* @returns {Promise<void>}

*/

load(config: embed.IInternalEmbedConfiguration): Promise<void> {

const errors = this.validate(config);

if (errors) {

throw errors;

}

let height = config.height ? config.height : this.iframe.offsetHeight;

let width = config.width ? config.width : this.iframe.offsetWidth;

let action = config.action ? config.action : 'loadTile';

let tileConfig = {

action: action,

height: height,

width: width,

accessToken: config.accessToken,

tokenType: config.tokenType,

}

this.iframe.contentWindow.postMessage(JSON.stringify(tileConfig), "*")

// In order to use this function the same way we use it in embed

// we need to keep the return type the same as 'load' in embed

return new Promise<void>( () => {

return;

});

}

/**

* Adds the ability to get tileId from url.

* By extracting the ID we can ensure that the ID is always explicitly provided as part of the load configuration.

*

* @static

* @param {string} url

* @returns {string}

*/

static findIdFromEmbedUrl(url: string): string {

const tileIdRegEx = /tileId="?([^&]+)"?/

const tileIdMatch = url.match(tileIdRegEx);

let tileId;

if (tileIdMatch) {

tileId = tileIdMatch[1];

}

return tileId;

}

/**

* Adds the ability to get events from iframe

*

* @param event: MessageEvent

*/

private receiveMessage(event: MessageEvent): void {

if (event.data) {

try {

let messageData = JSON.parse(event.data);

let value = {

navigationUrl: messageData.navigationUrl,

errors: messageData.error,

openReport: messageData.openReport

};

const tileEvent: service.IEvent<any> = {

type: 'tile',

id: this.config.uniqueId,

name: messageData.event,

value: value

};

this.service.handleTileEvents(tileEvent);

}

catch (e) {

console.log("invalid message data");

return;

}

}

}

}