Extract `Privacy` module

Centralizes how we redact sensitive information.

js/logging.js

@@ -8,10 +8,9 @@ const _ = require('lodash');
 
 const debuglogs = require('./modules/debuglogs');
 const Errors = require('./modules/types/errors');
+const Privacy = require('./modules/privacy');
 
 const ipc = electron.ipcRenderer;
-const PHONE_REGEX = /\+\d{7,12}(\d{3})/g;
-const GROUP_REGEX = /(group\()([^)]+)(\))/g;
 
 // Default Bunyan levels: https://github.com/trentm/node-bunyan#levels
 // To make it easier to visually scan logs, we make all levels the same length
@@ -25,20 +24,7 @@ const LEVELS = {
   10: 'trace',
 };
 
-
 // Backwards-compatible logging, simple strings and no level (defaulted to INFO)
-
-function redactPhone(text) {
-  return text.replace(PHONE_REGEX, '+[REDACTED]$1');
-}
-
-function redactGroup(text) {
-  return text.replace(
-    GROUP_REGEX,
-    (match, before, id, after) => `${before}[REDACTED]${id.slice(-3)}${after}`
-  );
-}
-
 function now() {
   const date = new Date();
   return date.toJSON();
@@ -61,8 +47,8 @@ function log(...args) {
     return item;
   });
 
-  const toSend = redactAll(str.join(' '));
-  ipc.send('log-info', toSend);
+  const logText = Privacy.redactAll(str.join(' '));
+  ipc.send('log-info', logText);
 }
 
 if (window.console) {
@@ -96,11 +82,7 @@ function formatLine(entry) {
 }
 
 function format(entries) {
-  return redactAll(entries.map(formatLine).join('\n')));
-}
-
-function redactAll(string) {
-  return Errors.redactSensitivePaths(redactGroup(redactPhone(string)));
+  return Privacy.redactAll(entries.map(formatLine).join('\n'));
 }
 
 function fetch() {

js/modules/privacy.js

@@ -0,0 +1,53 @@
+/* eslint-env node */
+
+const Path = require('path');
+
+const isString = require('lodash/isString');
+const compose = require('lodash/fp/compose');
+
+
+const PHONE_NUMBER_PATTERN = /\+\d{7,12}(\d{3})/g;
+const GROUP_ID_PATTERN = /(group\()([^)]+)(\))/g;
+
+const APP_ROOT_PATH = Path.join(__dirname, '..', '..', '..');
+const APP_ROOT_PATH_PATTERN = new RegExp(APP_ROOT_PATH, 'g');
+
+const REDACTION_PLACEHOLDER = '[REDACTED]';
+
+//      redactPhoneNumbers :: String -> String
+exports.redactPhoneNumbers = (text) => {
+  if (!isString(text)) {
+    throw new TypeError('`text` must be a string');
+  }
+
+  return text.replace(PHONE_NUMBER_PATTERN, `+${REDACTION_PLACEHOLDER}$1`);
+};
+
+//      redactGroupIds :: String -> String
+exports.redactGroupIds = (text) => {
+  if (!isString(text)) {
+    throw new TypeError('`text` must be a string');
+  }
+
+  return text.replace(
+    GROUP_ID_PATTERN,
+    (match, before, id, after) =>
+      `${before}${REDACTION_PLACEHOLDER}${id.slice(-3)}${after}`
+  );
+};
+
+//      redactSensitivePaths :: String -> String
+exports.redactSensitivePaths = (text) => {
+  if (!isString(text)) {
+    throw new TypeError('`text` must be a string');
+  }
+
+  return text.replace(APP_ROOT_PATH_PATTERN, REDACTION_PLACEHOLDER);
+};
+
+//      redactAll :: String -> String
+exports.redactAll = compose(
+  exports.redactSensitivePaths,
+  exports.redactGroupIds,
+  exports.redactPhoneNumbers
+);

js/modules/types/errors.js

@@ -1,26 +1,9 @@
-/* eslint-env node */
-
-const Path = require('path');
-
 const ensureError = require('ensure-error');
-const isString = require('lodash/isString');
-
 
-const APP_ROOT_PATH = Path.join(__dirname, '..', '..', '..');
-const APP_ROOT_PATH_PATTERN = new RegExp(APP_ROOT_PATH, 'g');
+const Privacy = require('../privacy');
 
 //      toLogFormat :: Error -> String
 exports.toLogFormat = (error) => {
   const normalizedError = ensureError(error);
-  const stackWithRedactedPaths = exports.redactSensitivePaths(normalizedError.stack);
-  return stackWithRedactedPaths;
-};
-
-//      redactSensitivePaths :: String -> String
-exports.redactSensitivePaths = (logLine) => {
-  if (!isString(logLine)) {
-    return logLine;
-  }
-
-  return logLine.replace(APP_ROOT_PATH_PATTERN, '<REDACTED_PATH>');
+  return Privacy.redactAll(normalizedError.stack);
 };

test/modules/types/errors_test.js

@@ -27,7 +27,7 @@ describe('Errors', () => {
         );
         assert.include(
           formattedStack,
-          '<REDACTED_PATH>',
+          '[REDACTED]',
           'Formatted stack has redactions'
         );
         return;