git.r.bdr.sh - rbdr/sumo/blob - lib/systems/render_winner.js

   1 import { System } from '@serpentity/serpentity';
   2 import { Text } from 'pixi.js';
   3
   4 import Config from '../config';
   5 import WinnerNode from '../nodes/winner';
   6
   7 const internals = {
   8   kNoPixiError: 'No pixi application passed to render system. Make sure you set the `application` key in the config object when initializing.'
   9 };
  10
  11 /**
  12  * Renders a winner if there is one
  13  *
  14  * @extends {external:Serpentity.System}
  15  * @class RenderWinnerSystem
  16  * @param {object} config a configuration object to extend.
  17  */
  18 export default class RenderWinnerSystem extends System {
  19
  20   constructor(config = {}) {
  21
  22     super();
  23
  24     /**
  25      * The keepers of the winner
  26      *
  27      * @property {external:Serpentity.NodeCollection} pointsKeepers
  28      * @instance
  29      * @memberof RenderWinnerSystem
  30      */
  31     this.winnerKeepers = null;
  32
  33     /**
  34      * The pixi engine we will use to render
  35      *
  36      * @property {external:PixiJs.Application} application
  37      * @instance
  38      * @memberof RenderWinnerSystem
  39      */
  40     this.application = config.application;
  41
  42     if (!this.application) {
  43       throw new Error(internals.kNoPixiError);
  44     }
  45   }
  46
  47   /**
  48    * Initializes system when added. Requests winner keepers
  49    *
  50    * @function added
  51    * @memberof RenderWinnerSystem
  52    * @instance
  53    * @param {external:Serpentity.Engine} engine the serpentity engine to
  54    * which we are getting added
  55    */
  56   added(engine) {
  57
  58     this.winnerKeepers = engine.getNodes(WinnerNode);
  59   }
  60
  61   /**
  62    * Clears system resources when removed.
  63    *
  64    * @function removed
  65    * @instance
  66    * @memberof RenderWinnerSystem
  67    */
  68   removed() {
  69
  70     this.pointsKeepers = null;
  71     if (internals.winnerText) {
  72       this.application.stage.removeChild(internals.winnerText);
  73       internals.winnerText = null;
  74     }
  75   }
  76
  77   /**
  78    * Runs on every update of the loop. Updates the bars
  79    *
  80    * @function update
  81    * @instance
  82    * @param {Number} currentFrameDuration the duration of the current
  83    * frame
  84    * @memberof RenderWinnerSystem
  85    */
  86   update(currentFrameDuration) {
  87
  88     // Right now this is final, once a winner is rendered you would need
  89     // to restart the whole system.
  90     if (internals.winnerText) {
  91       return;
  92     }
  93
  94     for (const winnerKeeper of this.winnerKeepers) {
  95       const winner = winnerKeeper.winner.winner;
  96       if (winner) {
  97         const message = `${winner} has won`;
  98         internals.winnerText = new Text(message, {
  99           fontFamily: 'Arial',
 100           fontSize: 96,
 101           fontWeight: 'bold',
 102           fill: 0xffffff,
 103           align: 'center'
 104         });
 105         internals.winnerText.position.x = Config.horizontalResolution / 2;
 106         internals.winnerText.position.y = Config.verticalResolution / 2;
 107         internals.winnerText.anchor.set(0.5);
 108         this.application.stage.addChild(internals.winnerText);
 109         return;
 110       }
 111     }
 112   }
 113 };
 114