import type { ReqFilter } from "./nostr"

/**
 * Remove empty filters, filters which would result in no results
 */
export function trimFilters(filters: Array<ReqFilter>) {
  const fNew = []
  for (const f of filters) {
    const ent = Object.entries(f).filter(([, v]) => Array.isArray(v))
    if (ent.every(([, v]) => (v as Array<string | number>).length > 0)) {
      fNew.push(f)
    }
  }
  return fNew
}