Werf aan op echte vaardigheden.
Niet op cv's.

import { normalizeEmail } from "./format";

const SOURCES = ["import", "form", "event", "referral"];

export function flagDuplicateLeads(leads) {
  const seen = new Map();
  const flagged = [];

  for (const lead of leads) {
    if (!SOURCES.includes(lead.source)) continue;

    const key = normalizeEmail(lead.email);
    const previous = seen.get(key);

    if (!previous) {
      seen.set(key, lead);
      continue;
    }

    flagged.push({
      keep: previous.id,
      drop: lead.id,
      reason: "same email, later entry",
    });
  }

  return { kept: [...seen.values()], flagged };
}