Rehydrate Functions

function rehydrate(
  text: string,
  piiMap: Map<string, string>,
  strict?: boolean,
  tagFormat?: TagFormat
): string

import { rehydrate, decryptPIIMap } from 'rehydra';

// After anonymization and translation
const translated = 'Hallo <PII type="PERSON" id="1"/> von <PII type="ORG" id="1"/>!';

// Decrypt the PII map
const key = await keyProvider.getKey();
const piiMap = await decryptPIIMap(result.piiMap, key);
// Map { 'PERSON:1' => 'John Smith', 'ORG:1' => 'Acme Corp' }

// Rehydrate
const original = rehydrate(translated, piiMap);
// "Hallo John Smith von Acme Corp!"

function decryptPIIMap(
  encryptedMap: EncryptedPIIMap,
  key: Uint8Array
): Promise<Map<string, string>>

import { decryptPIIMap, InMemoryKeyProvider } from 'rehydra';

const keyProvider = new InMemoryKeyProvider();

// During anonymization
const anonymizer = createAnonymizer({ keyProvider });
const result = await anonymizer.anonymize('Email: john@example.com');

// Later, to rehydrate
const key = await keyProvider.getKey();
const piiMap = await decryptPIIMap(result.piiMap, key);

console.log(piiMap.get('EMAIL:1'));  // "john@example.com"

import { 
  createAnonymizer,
  decryptPIIMap,
  rehydrate,
  InMemoryKeyProvider
} from 'rehydra';

// 1. Setup
const keyProvider = new InMemoryKeyProvider();
const anonymizer = createAnonymizer({
  ner: { mode: 'quantized' },
  keyProvider
});
await anonymizer.initialize();

// 2. Anonymize
const result = await anonymizer.anonymize(
  'Contact John Smith at john@acme.com'
);
console.log(result.anonymizedText);
// "Contact <PII type="PERSON" id="1"/> at <PII type="EMAIL" id="1"/>"

// 3. Process (e.g., translate)
const translated = await translate(result.anonymizedText);
// "Kontaktieren Sie <PII type="PERSON" id="1"/> unter <PII type="EMAIL" id="1"/>"

// 4. Decrypt PII map
const key = await keyProvider.getKey();
const piiMap = await decryptPIIMap(result.piiMap, key);

// 5. Rehydrate
const final = rehydrate(translated, piiMap);
console.log(final);
// "Kontaktieren Sie John Smith unter john@acme.com"

// 6. Cleanup
await anonymizer.dispose();

const session = anonymizer.session('chat-123');

// Anonymize (auto-saves PII map)
const result = await session.anonymize('Hello John Smith!');

// Rehydrate (auto-loads and decrypts)
const original = await session.rehydrate(result.anonymizedText);

<PII type="TYPE" id="N"/>
<PII type="TYPE" id="N" gender="..."/>
<PII type="TYPE" id="N" scope="..."/>

const tagFormat = { open: '[[', close: ']]' };
const text = '[[PII type="PERSON" id="1"]] from [[PII type="ORG" id="2"]]';
const result = rehydrate(text, piiMap, false, tagFormat);

const text = 'Hello <PII type="PERSON" id="1"/> and <BROKEN/>';
const result = rehydrate(text, piiMap);
// "Hello John Smith and <BROKEN/>"
// Unmatched tags are preserved

try {
  const piiMap = await decryptPIIMap(result.piiMap, wrongKey);
} catch (error) {
  // "Decryption failed: invalid key or corrupted data"
}

const piiMap = new Map([['EMAIL:1', 'test@example.com']]);
const text = '<PII type="PERSON" id="1"/>';  // Not in map

const result = rehydrate(text, piiMap);
// "<PII type="PERSON" id="1"/>"  // Unchanged (no match)