Function parseOshaXml

parseOshaXml(xml: string): OshaChemical[]

Parses the OBIS Chemical_DB.xml document into slimmed records. Records without a name are skipped. Requires DOMParser (available on extension pages, not in the service worker).

Parameters

xml: string
The raw XML text.

Returns OshaChemical[]

The slimmed chemical records.

Throws

When the XML is malformed.

Example

parseOshaXml('<chemical_db><chemical><Analyte>ACETONE</Analyte><CASNumber>67-64-1</CASNumber></chemical></chemical_db>');
// [{ name: "ACETONE", cas: "67-64-1", synonyms: [] }]

Source

export function parseOshaXml(xml: string): OshaChemical[] {
  const doc = new DOMParser().parseFromString(xml, 'text/xml');
  if (doc.getElementsByTagName('parsererror').length > 0) {
    throw new Error('Malformed OSHA OBIS XML');
  }

  const chemicals: OshaChemical[] = [];
  for (const node of Array.from(doc.getElementsByTagName('chemical'))) {
    const analyte = readField(node, 'Analyte');
    if (analyte === undefined) continue;

    const chemical: OshaChemical = {
      name: analyte.replace(/[†‡]/g, '').trim(),
      synonyms: (readField(node, 'Synonyms') ?? '')
        .split(';')
        .map((synonym) => synonym.trim())
        .filter((synonym) => synonym !== ''),
    };
    for (const [field, tag] of FIELD_MAP) {
      const raw = readField(node, tag);
      if (raw === undefined) continue;
      // OBIS publishes links without a scheme.
      const value = tag.endsWith('URL') && !/^https?:\/\//.test(raw) ? `https://${raw}` : raw;
      Object.assign(chemical, { [field]: value });
    }
    chemicals.push(chemical);
  }
  return chemicals;
}