Add named search query properties to use in keyword filtering

[andymerskin]

It would be awesome to have the ability to specify and pass parameters/properties to a keyword filter.

Example keyword definition for a rating filter:

keywords: {
  rating: {
    queries: [
      '{{count}} stars',
      'rated {{count}}'
      ],
    filter: (collection, {count}) => {
      return collection.filter(item => item.rating >= parseInt(count, 10))
    }    
  }
}

Questions:

• Should type conversions be handled by the user?
  • We could have it test for a parsed Number, and if true, pass as a number (feels too prescriptive).

    const numCount = parseInt(count)
    return numCount ? numCount : count

  • Users could specify types in the keyword definition. Would be useful for validation before filtering collection.

    {
      queries: ...,
      filter: ...,
      props: {
        count: Number
      }
    }