function _escapeRegExp( str ) {
  return str.replace( /[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&" );
}

function marketsSearchFilter( collection, query ) {
  if ( !query ) return collection;

  let pattern = new RegExp( _escapeRegExp( query ), 'i' );

  return collection.filter( market => {
    return pattern.test( market.Outcomes[ 0 ]._Selection.fullMarketName );
  });
}

export default () => marketsSearchFilter;