react-tinymce-mention/src/mention/utils/normalizeDataSource.js

@Mention functionality for TinyMCE, built with React and Redux.

import invariant from 'invariant';
import containsConsistantType from './containsConsistantType';

export default function validateDataSource(dataSource) {
  invariant(dataSource instanceof Array,
    'Error transforming response: `transformedDataSource` must be an array.'
  );

  // Array of ojects with a `displayLabel` and `searchKey`
  if (containsConsistantType(dataSource, 'object')) {

    // Validate that each object has `searchKey`
    const isValid = dataSource.every(s => {
      return (
        s.hasOwnProperty('displayLabel') && typeof s.displayLabel === 'string' &&
        s.hasOwnProperty('searchKey') && typeof s.searchKey === 'string'
      );
    });

    invariant(isValid,
      'Each object in the `transformedDataSource` should contain a `searchKey` ' +
      'property that is a string.'
    );

    return {
      dataSource
    };

  // Array containing simple strings, e.g., ['dimitri', 'shostakovich']
  } else if (containsConsistantType(dataSource, 'string')) {
    const normalizedDataSource = dataSource.map(source => ({
      searchKey: source,
      displayLabel: source
    }));

    return {
      dataSource: normalizedDataSource
    };

  } else {
    throw new Error(
      'Validation Error: `transformedDataSource` must be an array of strings ' +
      'or contain objects with a `displayLabel` and `searchKey` property.'
    );
  }
}