src/hero.mjs: Include "timestamp" in the logged data objects

1 files changed, 11 insertions, 6 deletions

diff --git a/src/hero.mjs b/src/hero.mjs
index 34ac45c..e057781 100644
--- a/src/hero.mjs
+++ b/src/hero.mjs
@@ -19,21 +19,26 @@ export let loggerGlobals = {};
 
 export const configLogger = o => loggerGlobals = o;
 
-export const logit = (writerFn, level, o) =>
+export const logit = (writerFn, timestampFn, level, o) =>
 	writerFn(JSON.stringify({
 		...loggerDefaults,
 		...loggerGlobals,
 		level,
+		timestamp: timestampFn(),
 		...o,
 	}));
 
-export const makeLogger = (writerFn = console.error) => ({
+const now = () => (new Date()).toISOString();
+export const makeLogger = ({
+	writerFn = console.error,
+	timestampFn = now,
+} = {}) => ({
 	debug: (...args) => process.env.DEBUG ?
-		logit(writerFn, "DEBUG", ...args) :
+		logit(writerFn, timestampFn, "DEBUG", ...args) :
 		null,
-	info:  u.partial(logit, writerFn, "INFO"),
-	warn:  u.partial(logit, writerFn, "WARN"),
-	error: u.partial(logit, writerFn, "ERROR"),
+	info:  u.partial(logit, writerFn, timestampFn, "INFO"),
+	warn:  u.partial(logit, writerFn, timestampFn, "WARN"),
+	error: u.partial(logit, writerFn, timestampFn, "ERROR"),
 });
 
 export const log = makeLogger();