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import { System } from '@serpentity/serpentity';
import { Text } from 'pixi.js';
import Config from '../config';
import WinnerNode from '../nodes/winner';
const internals = {
kNoPixiError: 'No pixi application passed to render system. Make sure you set the `application` key in the config object when initializing.'
};
/**
* Renders a winner if there is one
*
* @extends {external:Serpentity.System}
* @class RenderWinnerSystem
* @param {object} config a configuration object to extend.
*/
export default class RenderWinnerSystem extends System {
constructor(config = {}) {
super();
/**
* The keepers of the winner
*
* @property {external:Serpentity.NodeCollection} pointsKeepers
* @instance
* @memberof RenderWinnerSystem
*/
this.winnerKeepers = null;
/**
* The pixi engine we will use to render
*
* @property {external:PixiJs.Application} application
* @instance
* @memberof RenderWinnerSystem
*/
this.application = config.application;
if (!this.application) {
throw new Error(internals.kNoPixiError);
}
}
/**
* Initializes system when added. Requests winner keepers
*
* @function added
* @memberof RenderWinnerSystem
* @instance
* @param {external:Serpentity.Engine} engine the serpentity engine to
* which we are getting added
*/
added(engine) {
this.winnerKeepers = engine.getNodes(WinnerNode);
}
/**
* Clears system resources when removed.
*
* @function removed
* @instance
* @memberof RenderWinnerSystem
*/
removed() {
this.pointsKeepers = null;
if (internals.winnerText) {
this.application.stage.removeChild(internals.winnerText);
internals.winnerText = null;
}
}
/**
* Runs on every update of the loop. Updates the bars
*
* @function update
* @instance
* @param {Number} currentFrameDuration the duration of the current
* frame
* @memberof RenderWinnerSystem
*/
update(currentFrameDuration) {
// Right now this is final, once a winner is rendered you would need
// to restart the whole system.
if (internals.winnerText) {
return;
}
for (const winnerKeeper of this.winnerKeepers) {
const winner = winnerKeeper.winner.winner;
if (winner) {
const message = `${winner} has won`;
internals.winnerText = new Text(message, {
fontFamily: 'Arial',
fontSize: 96,
fontWeight: 'bold',
fill: 0xffffff,
align: 'center'
});
internals.winnerText.position.x = Config.horizontalResolution / 2;
internals.winnerText.position.y = Config.verticalResolution / 2;
internals.winnerText.anchor.set(0.5);
this.application.stage.addChild(internals.winnerText);
return;
}
}
}
};
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