feathers-snake-case-hook/lib/to-snake-case.js

A service hook to convert params.query into snake_case

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = toSnakeCase;

var _lodash = require('lodash');

function toSnakeCase() {
  for (var _len = arguments.length, except = Array(_len), _key = 0; _key < _len; _key++) {
    except[_key] = arguments[_key];
  }

  var filters = ['$eager', '$search', '$select', '$limit', '$skip', '$populate', '$sort'];
  var snakeFields = function snakeFields(data) {
    var _iteratorNormalCompletion = true;
    var _didIteratorError = false;
    var _iteratorError = undefined;

    try {
      for (var _iterator = Object.keys(data)[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
        var key = _step.value;

        if (!except.includes(key) && !filters.includes(key)) {
          var snakedKey = (0, _lodash.snakeCase)(key);
          data[snakedKey] = data[key];
          if (snakedKey !== key) {
            delete data[key];
          }
        }
      }
    } catch (err) {
      _didIteratorError = true;
      _iteratorError = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion && _iterator.return) {
          _iterator.return();
        }
      } finally {
        if (_didIteratorError) {
          throw _iteratorError;
        }
      }
    }
  };

  return function (hook) {
    if (hook.type !== 'before') {
      throw new Error('"snakeCase" must be used in before hook only.');
    }

    // If no `params` or `query` specified
    if (!hook.params || !hook.params.query) {
      return hook;
    }

    if (hook.params.query) {
      snakeFields(hook.params.query);
    }

    if (hook.params.query.$sort) {
      snakeFields(hook.params.query.$sort);
    }

    if (hook.params.query.$select) {
      hook.params.query.$select = hook.params.query.$select.map(function (col) {
        return (0, _lodash.snakeCase)(col);
      });
    }
    return hook;
  };
}
module.exports = exports['default'];