All files / games/src/engine/systems system.ts

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import { SystemInterface, WorldInterface } from "@jga/patterns";
 
import { ComponentName } from "../components";
import { Entity } from "../entities";
 
export abstract class System implements SystemInterface {
    protected entities: Map<string, Entity> = new Map<string, Entity>();
 
    public constructor(entities: Map<string, Entity>, filters: ComponentName[]) {
        this.entities = this.filterEntities(entities, filters);
    }
 
    public getEntities(): Map<string, Entity> {
        return this.entities;
    }
 
    public abstract run(world?: WorldInterface): void;
 
    // eslint-disable-next-line class-methods-use-this
    protected filterEntities(entities: Map<string, Entity>, filters: ComponentName[]): Map<string, Entity> {
        const filtered: Map<string, Entity> = new Map<string, Entity>();
 
        entities.forEach((entity, key): void => {
            let found = 0;
            filters.forEach((filter): void => {
                if (entity != null && entity.hasComponent(filter)) {
                    found += 1;
                }
            });
 
            if (found === filters.length) {
                filtered.set(key, entity);
            }
        });
 
        return filtered;
    }
}