db anonymization implementation

services/anonymization.js

@@ -0,0 +1,32 @@
+"use strict";
+
+const data_dir = require('./data_dir');
+const utils = require('./utils');
+const fs = require('fs-extra');
+const sqlite = require('sqlite');
+
+async function anonymize() {
+    if (!fs.existsSync(data_dir.ANONYMIZED_DB_DIR)) {
+        fs.mkdirSync(data_dir.ANONYMIZED_DB_DIR, 0o700);
+    }
+
+    const anonymizedFile = data_dir.ANONYMIZED_DB_DIR + "/" + "backup-" + utils.getDateTimeForFile() + ".db";
+
+    fs.copySync(data_dir.DOCUMENT_PATH, anonymizedFile);
+
+    const db = await sqlite.open(anonymizedFile, {Promise});
+
+    await db.run("UPDATE notes SET note_title = 'title', note_text = 'text'");
+    await db.run("UPDATE notes_history SET note_title = 'title', note_text = 'text'");
+    await db.run("UPDATE notes_tree SET prefix = 'prefix' WHERE prefix IS NOT NULL");
+    await db.run(`UPDATE options SET opt_value = 'anonymized' WHERE opt_name IN 
+                    ('document_secret', 'encrypted_data_key', 'password_verification_hash', 
+                     'password_verification_salt', 'password_derived_key_salt')`);
+    await db.run("VACUUM");
+
+    await db.close();
+}
+
+module.exports = {
+    anonymize
+};