js-data-projector/src/validate-projection-schema.js

import {InvalidArgumentError} from '@e22m4u/js-format';

/**
 * Validate projection schema.
 *
 * @param {object|Function|string} schema
 * @param {boolean} [shallowMode]
 */
export function validateProjectionSchema(schema, shallowMode = false) {
  // schema
  if (
    !schema ||
    (typeof schema !== 'object' &&
      typeof schema !== 'function' &&
      typeof schema !== 'string') ||
    Array.isArray(schema)
  ) {
    throw new InvalidArgumentError(
      'Projection schema must be an Object, a Function ' +
        'or a non-empty String, but %v was given.',
      schema,
    );
  }
  if (typeof schema !== 'object') {
    return;
  }
  // schema[k]
  Object.keys(schema).forEach(propName => {
    const propOptions = schema[propName];
    if (propOptions === undefined) {
      return;
    }
    if (
      propOptions === null ||
      (typeof propOptions !== 'object' && typeof propOptions !== 'boolean') ||
      Array.isArray(propOptions)
    ) {
      throw new InvalidArgumentError(
        'Property options must be an Object or a Boolean, but %v was given.',
        propOptions,
      );
    }
    if (typeof propOptions === 'boolean') {
      return;
    }
    // schema[k].select
    if (
      propOptions.select !== undefined &&
      typeof propOptions.select !== 'boolean'
    ) {
      throw new InvalidArgumentError(
        'Property option "select" must be a Boolean, but %v was given.',
        propOptions.select,
      );
    }
    // schema[k].scopes
    if (propOptions.scopes !== undefined) {
      if (
        !propOptions.scopes ||
        typeof propOptions.scopes !== 'object' ||
        Array.isArray(propOptions.scopes)
      ) {
        throw new InvalidArgumentError(
          'Property option "scopes" must be an Object, but %v was given.',
          propOptions.scopes,
        );
      }
      Object.values(propOptions.scopes).forEach(scopeOptions => {
        if (scopeOptions === undefined) {
          return;
        }
        // schema[k].scopes[k]
        if (
          scopeOptions === null ||
          (typeof scopeOptions !== 'object' &&
            typeof scopeOptions !== 'boolean') ||
          Array.isArray(scopeOptions)
        ) {
          throw new InvalidArgumentError(
            'Scope options must be an Object or a Boolean, but %v was given.',
            scopeOptions,
          );
        }
        // schema[k].scopes[k].select
        if (
          scopeOptions.select !== undefined &&
          typeof scopeOptions.select !== 'boolean'
        ) {
          throw new InvalidArgumentError(
            'Scope option "select" must be a Boolean, but %v was given.',
            scopeOptions.select,
          );
        }
      });
    }
    // schema[k].schema
    if (propOptions.schema !== undefined) {
      if (
        !propOptions.schema ||
        (typeof propOptions.schema !== 'object' &&
          typeof propOptions.schema !== 'function' &&
          typeof propOptions.schema !== 'string') ||
        Array.isArray(propOptions.schema)
      ) {
        throw new InvalidArgumentError(
          'Property option "schema" must be an Object, a Function' +
            ' or a non-empty String, but %v was given.',
          propOptions.schema,
        );
      }
      if (!shallowMode && typeof propOptions.schema === 'object') {
        validateProjectionSchema(propOptions.schema, shallowMode);
      }
    }
  });
}