smartobject/ts/tools/smart_add_get.ts

import * as plugins from '../smartobject.plugins';

/**
 * adds an object to the parent object if it doesn't exists
 * @param parentObject
 * @param childParam
 * @param logBool
 * @returns {boolean}
 */
 export const smartAdd = (
  parentObject: object,
  childParam: string,
  valueArg: any = {},
  optionsArg?: {
    interpretDotsAsLevel: boolean;
  }
): typeof parentObject & any => {
  optionsArg = {
    interpretDotsAsLevel: true,
    ...optionsArg
  };

  let paramLevels: string[];
  let referencePointer: any = parentObject;
  if (optionsArg.interpretDotsAsLevel) {
    paramLevels = childParam.split('.');
  } else {
    paramLevels = [childParam];
  }

  for (let i = 0; i !== paramLevels.length; i++) {
    const varName: string = paramLevels[i];

    // is there a next variable ?
    const varNameNext: string = (() => {
      if (paramLevels[i + 1]) {
        return paramLevels[i + 1];
      }
      return null;
    })();

    // build the tree in parentObject
    if (!referencePointer[varName] && !varNameNext) {
      referencePointer[varName] = valueArg;
      referencePointer = null;
    } else if (!referencePointer[varName] && varNameNext) {
      referencePointer[varName] = {};
      referencePointer = referencePointer[varName];
    } else if (referencePointer[varName] && varNameNext) {
      referencePointer = referencePointer[varName];
    } else {
      throw new Error('Something is strange!');
    }
  }
  return parentObject;
};

/**
 * gets an object from the parent object using dots as levels by default
 * @param parentObject
 * @param childParam
 * @param optionsArg
 */
export const smartGet = <T>(
  parentObject: object,
  childParam: string,
  optionsArg?: {
    interpretDotsAsLevel: boolean;
  }
): T => {
  optionsArg = {
    interpretDotsAsLevel: true,
    ...optionsArg
  };

  let paramLevels: string[];
  if (optionsArg.interpretDotsAsLevel) {
    paramLevels = childParam.split('.');
  } else {
    paramLevels = [childParam];
  }

  let referencePointer: any = parentObject;
  for (const level of paramLevels) {
    if (referencePointer[level as any]) {
      referencePointer = referencePointer[level as any];
    } else {
      return null;
    }
  }
  return referencePointer as T;
};