filterParams.js

/**
 * Convert URL query params to flattened db query params
 * e.g.
 * filterParams('capture', {
 *   id        : [ 'codex_capture_id', 'codex_second_day_capture_id' ],
 *   shot_name : [ 'CODEX_SHOT_0000065', 'DJI00056' ]
 * })
 * Results in:
 * {
 *   filter_capture__id_0        : 'codex_capture_id',
 *   filter_capture__id_1        : 'codex_second_day_capture_id',
 *   filter_capture__shot_name_0 : 'CODEX_SHOT_0000065',
 *   filter_capture__shot_name_1 : 'DJI00056'
 * }
 */
var filterParams = (node, filters) =>
  R
    .toPairs(filters)
    .reduce(
      (params, filterPair) =>
        filterPair[1].reduce(
          (acc, val, i) => R.assoc(`filter_${node}__${filterPair[0]}_${i}`, val, acc),
          params
        )
      ,
      {}
    )
;