web-cad/frontend/src/canvas/LayerManager.ts

type Layer = {
  id: string;
  name: string;
  visible: boolean;
  locked: boolean;
};

export class LayerManager {
  private layers: Layer[] = [];

  public addLayer(layer: Layer): void {
    this.layers.push(layer);
  }

  public removeLayer(id: string): void {
    const index = this.layers.findIndex(layer => layer.id === id);
    if (index !== -1) {
      this.layers.splice(index, 1);
    }
  }

  public updateLayer(layer: Layer): void {
    const index = this.layers.findIndex(l => l.id === layer.id);
    if (index !== -1) {
      this.layers[index] = layer;
    }
  }

  public getLayer(id: string): Layer | undefined {
    return this.layers.find(layer => layer.id === id);
  }

  public getLayers(): Layer[] {
    return this.layers;
  }

  public getVisibleLayers(): Layer[] {
    return this.layers.filter(layer => layer.visible && !layer.locked);
  }

  public setVisible(id: string, visible: boolean): void {
    const layer = this.getLayer(id);
    if (layer) {
      layer.visible = visible;
    }
  }

  public setLocked(id: string, locked: boolean): void {
    const layer = this.getLayer(id);
    if (layer) {
      layer.locked = locked;
    }
  }

  public moveLayer(id: string, newIndex: number): void {
    const index = this.layers.findIndex(layer => layer.id === id);
    if (index !== -1) {
      const [layer] = this.layers.splice(index, 1);
      this.layers.splice(newIndex, 0, layer);
    }
  }
}