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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | 44x 44x 44x 44x 12x 12x 12x 12x 7x 7x 5x 5x 7x 7x 1x 1x 1x 1x 1x 1x 1x 1x 7x 5x 5x 1x 1x 1x 1x 1x 1x 1x 1x 5x 8x 8x 8x 8x 8x 8x 8x 8x 8x | import { Command, type CommandResultInterface } from "@jga/patterns";
import { Directions, type PositionInterface } from "../maps/index";
import { Actor, ComponentName, Entity, isPositionComponent, MovementSystem, World } from "../engine/index";
export class MoveCommand extends Command {
protected actor: Actor;
protected direction: Directions;
protected engine: World;
public constructor(actor: Actor, direction: Directions, engine: World) {
super();
this.actor = actor;
this.direction = direction;
this.engine = engine;
}
public execute(): CommandResultInterface {
const result = this.move();
return {
message: `Move => ${this.direction}`,
result,
};
}
public undo(): CommandResultInterface | null {
const result = this.moveBack();
return {
message: `Move => ${this.direction}`,
result,
};
}
protected move(): PositionInterface | null {
let result: PositionInterface | null = null;
switch (this.direction) {
case Directions.DOWN: {
result = this.moveTo(0, 1);
break;
}
case Directions.LEFT: {
result = this.moveTo(-1, 0);
break;
}
case Directions.RIGHT: {
result = this.moveTo(1, 0);
break;
}
case Directions.UP: {
result = this.moveTo(0, -1);
break;
}
default:
}
return result;
}
protected moveBack(): PositionInterface | null {
let result: PositionInterface | null = null;
switch (this.direction) {
case Directions.DOWN: {
result = this.moveTo(0, -1);
break;
}
case Directions.LEFT: {
result = this.moveTo(1, 0);
break;
}
case Directions.RIGHT: {
result = this.moveTo(-1, 0);
break;
}
case Directions.UP: {
result = this.moveTo(0, 1);
break;
}
default:
}
return result;
}
protected moveTo(dX: number, dY: number): PositionInterface {
const newPosition: PositionInterface = { x: 0, y: 0 };
const actorPosition = this.actor.getComponent(ComponentName.POSITION);
if (isPositionComponent(actorPosition)) {
newPosition.x = Math.max(
0,
Math.min(this.engine.getMap().getWidth() - 1, actorPosition.getPosition().x + dX),
);
newPosition.y = Math.max(
0,
Math.min(this.engine.getMap().getHeight() - 1, actorPosition.getPosition().y + dY),
);
const entities = new Map<string, Entity>();
entities.set(this.actor.getId(), this.actor);
this.engine.run(new MovementSystem(entities, newPosition, this.engine.getEntities()));
}
return newPosition;
}
}
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