@comyata/run/DataNode.js

Simplify data workflows and management with data templates, for browser and server.

/**
 * @todo add fileId as global root identifier
 */

export class DataNode {
  engine = undefined;
  computed = undefined;

  // todo: this is mixing "data type" and "internal node type", not needed anymore?

  constructor(parent, path, valueType, value, extractExpr) {
    this.path = path;
    this.valueType = valueType;
    this.value = value;
    this.extractExpr = extractExpr;
    if (parent) {
      this.parent = () => parent;
    }
  }
  withHydrate(hydrate) {
    if (this.hydrate) {
      throw new Error(`Can not overwrite hydrate in ${JSON.stringify(this.path)}`);
    }
    this.hydrate = hydrate;
    return this;
  }
}
export class DataNodeObject extends DataNode {
  children = new Map();
  constructor(parent, path, valueType, value) {
    super(parent, path, valueType, value);
  }
  append(key, dataNode) {
    this.children.set(key, dataNode);
  }
}
export function isComputedNode(node) {
  return Boolean(node.engine && node.computed);
}