@natlibfi/melinda-record-match-validator/dist/field984.js

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

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.check984 = check984;
// Implements MRA-744
function check984({
  record1,
  record2
}) {
  const score1 = score984(record1);
  const score2 = score984(record2);
  // Should we use more generic score1 > score2? Does not having a 260/264 field imply badness?
  // Currently
  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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