@natlibfi/melinda-record-match-validator/dist/compareFunctions/compareField984.js

Validates if two records matched by melinda-record-matching can be merged and sets merge priority

export function check984({ record1, record2 }) {
  const score1 = score984(record1);
  const score2 = score984(record2);
  if (score1 > score2) {
    return "A";
  }
  if (score2 > score1) {
    return "B";
  }
  return true;
  function score984(currRecord) {
    const fields984 = currRecord.fields.filter((f) => f.tag === "984");
    if (fields984.some((f) => isPreferred(f))) {
      return 1;
    }
    if (fields984.some((f) => isSnubbed(f))) {
      return -1;
    }
    return 0;
  }
  function isPreferred(field) {
    if (field.tag !== "984") {
      return false;
    }
    return field.subfields.some((sf) => sf.code === "a" && sf.value === "ALWAYS-PREFER-IN-MERGE");
  }
  function isSnubbed(field) {
    if (field.tag !== "984") {
      return false;
    }
    return field.subfields.some((sf) => sf.code === "a" && sf.value === "NEVER-PREFER-IN-MERGE");
  }
}
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