import Fuse from "fuse.js" ; export class MemorySearch < T > { readonly store = new Set < T > ( ) ; readonly index = new Fuse < { key : string ; value : T ; } > ( [ ] , { keys : [ "key" ] , threshold : 0.2 , findAllMatches : true , } ) ; add ( text , value ) { this . store . add ( value ) ; if ( Array . isArray ( text ) ) { for ( const key of text ) { this . index . add ( { key , value } ) ; } } else { this . index . add ( { key : text , value } ) ; } } search ( text ) { if ( text . trim ( ) ) { return this . index . search ( { $and : text . split ( " " ) . filter ( ( v ) => v ) . map ( ( key ) => ( { key } ) ) , } ) . map ( ( { item : { value } } ) => value ) ; } else { return [ ... this . store ] ; } } }