State shape

// As stored in state variable
facets = {
  operator: 'AND',
  filterGroups: [
    {
      operator: 'AND',
      filters: [
        {
          attribute: 'name',
          comparator: '$iLike',
          value: 'John'
        },
        {
          attribute: 'lastActiveAt',
          comparator: '$between',
          value: ['Thu Dec 12 2019 11:59:27 GMT-0800', 'Thu Dec 19 2019 11:59:27 GMT-0800']
        }
      ]
    },
    {
      operator: 'AND',
      filters: [
        {
          attribute: 'userId',
          comparator: '$gte',
          value: 20
        }
      ]
    }
  ]
}

// Function to convert facets into query
fn(facets)
=>
{
  $and: [
    $and: [
      name: { $iLike: 'John' },
      lastActiveAt: { $between: ['Thu Dec 12 2019 11:59:27 GMT-0800', 'Thu Dec 19 2019 11:59:27 GMT-0800'] }
    ],
    $and: [
      userId: { $gte: 20 }
    ]
  ]
}