Add an assertion when updating conversations; update cleanData

ts/logging/log.ts

@@ -0,0 +1,33 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { noop } from 'lodash';
+import { LogLevel } from './shared';
+
+type LogAtLevelFnType = (
+  level: LogLevel,
+  ...args: ReadonlyArray<unknown>
+) => void;
+
+let logAtLevel: LogAtLevelFnType = noop;
+let hasInitialized = false;
+
+type LogFn = (...args: ReadonlyArray<unknown>) => void;
+export const fatal: LogFn = (...args) => logAtLevel(LogLevel.Fatal, ...args);
+export const error: LogFn = (...args) => logAtLevel(LogLevel.Error, ...args);
+export const warn: LogFn = (...args) => logAtLevel(LogLevel.Warn, ...args);
+export const info: LogFn = (...args) => logAtLevel(LogLevel.Info, ...args);
+export const debug: LogFn = (...args) => logAtLevel(LogLevel.Debug, ...args);
+export const trace: LogFn = (...args) => logAtLevel(LogLevel.Trace, ...args);
+
+/**
+ * Sets the low-level logging interface. Should be called early in a process's life, and
+ * can only be called once.
+ */
+export function setLogAtLevel(log: LogAtLevelFnType): void {
+  if (hasInitialized) {
+    throw new Error('Logger has already been initialized');
+  }
+  logAtLevel = log;
+  hasInitialized = true;
+}