Class WrappedData

packages/@stdlib/crypto/src/wrapped-data.ts:46–176

}

export class WrappedData implements Wrappable {
  layers: DataLayer[] = [];
  metadata: any = {};
  content: Uint8Array = new Uint8Array();

  constructor(value: Uint8Array, params?: { raw?: boolean; metadata?: any }) {
    this.metadata = params?.metadata ?? {};

    if (params?.raw) {
      this.layers.push(DataLayer.Raw);

      this.content = value;
    } else {
      if (value[0] >= 3) {
        // New format

        const obj = unpack(value.slice(1)) as {
          layers: DataLayer[];
          metadata: any;
          content: Uint8Array;
        };

        this.layers = obj.layers;
        this.metadata = obj.metadata;
        this.content = obj.content;
      } else {
        // Old format

        let index = 0;

        while (value[index] !== DataLayer.Raw) {
          this.layers.push(value[index++]);
        }

        this.layers.push(value[index++]);

        this.content = value.slice(index);
      }
    }
  }

  get topLayer() {
    return this.layers[0];
  }
  hasLayer(layer: DataLayer) {
    return this.layers.includes(layer);
  }
  countLayerType(layer: DataLayer) {
    return this.layers.filter((l) => l === layer).length;
  }

  get value() {
    return new Uint8Array([
      3,
      ...pack({
        layers: this.layers,
        metadata: this.metadata,
        content: this.content,