6.6 Search builder class

[margaretjgu]

Size: M

Description:
Implement fluent Search builder class.

Implementation:

export function Search(index?: string): SearchBuilder

class SearchBuilder {
  index(name: string): SearchBuilder
  query(q: Query): SearchBuilder
  aggs(...aggs: Agg[]): SearchBuilder
  sort(...fields: SortField[]): SearchBuilder
  size(n: number): SearchBuilder
  from(n: number): SearchBuilder
  source(fields: string[] | boolean): SearchBuilder
  
  toJSON(): SearchRequest
}

Acceptance:

• Fluent API works
• Search().query(Q.match(...)).size(10).toJSON() returns valid request
• All search options supported
• Immutable chaining
• Unit tests