perf: removes date-fns dependency for bundle size reduction

package.json

@@ -63,6 +63,7 @@
     "@vuepress/theme-default": "^2.0.0-rc.11",
     "commitizen": "^4.3.0",
     "cz-conventional-changelog": "^3.3.0",
+    "date-fns": "^3.6.0",
     "eslint": "^8.57.0",
     "eslint-config-prettier": "^9.1.0",
     "happy-dom": "^15.7.3",
@@ -87,7 +88,6 @@
   },
   "dependencies": {
     "chalk": "^5.3.0",
-    "date-fns": "^3.6.0",
     "vuepress-plugin-search-pro": "^2.0.0-rc.52"
   },
   "size-limit": [

src/formatters/formatter.ts

@@ -1,4 +1,4 @@
-import { formatISO } from 'date-fns/formatISO';
+import { formatISO } from '../functions';
 import { LevelConfiguration, ModifierData } from '../_types';
 import { Configuration } from '../configuration';
 import {

src/formatters/json/json.ts

@@ -1,6 +1,6 @@
 import Formatter from '../formatter';
 import { ModifierData } from '../../_types';
-import { formatISO } from 'date-fns/formatISO';
+import { formatISO } from '../../functions';
 import { JsonLog, JsonLogOptionalFields, JsonLogRequiredFields } from './types';
 import { hasRequiredFields } from './type-guards';
 import { setup } from '../../functions';

src/formatters/standard/standard.ts

@@ -1,6 +1,6 @@
 import Formatter from '../formatter';
 import { ModifierData } from '../../_types';
-import { formatISO } from 'date-fns/formatISO';
+import { formatISO } from '../../functions';
 import { isNumber, isObject, isString } from '../../functions';
 
 /**

src/functions/data.ts

@@ -26,3 +26,36 @@ export function getActiveLevel(cfg: Configuration): number {
   if (isNumber(cfg.activeLevel)) return cfg.activeLevel;
   return cfg.levels[cfg.activeLevel].level;
 }
+
+/**
+ * Adds a leading zero to a number if it is less than 10.
+ */
+export function leadingZero(num: number): string {
+  return (num < 10 ? '0' : '') + `${num}`;
+}
+
+/**
+ * Returns an ISO-8601 formatted string from the provided date.
+ */
+export function formatISO(date: Date) {
+  const tzo = -date.getTimezoneOffset();
+  const dif = tzo >= 0 ? '+' : '-';
+
+  return (
+    `${date.getFullYear()}` +
+    '-' +
+    leadingZero(date.getMonth() + 1) +
+    '-' +
+    leadingZero(date.getDate()) +
+    'T' +
+    leadingZero(date.getHours()) +
+    ':' +
+    leadingZero(date.getMinutes()) +
+    ':' +
+    leadingZero(date.getSeconds()) +
+    dif +
+    leadingZero(Math.floor(Math.abs(tzo) / 60)) +
+    ':' +
+    leadingZero(Math.abs(tzo) % 60)
+  );
+}

test/modifiers.test.ts

@@ -41,4 +41,17 @@ describe('modifiers with pretty format in the browser', () => {
     adze.silent.log('Test log.');
     expect(console.log).not.toHaveBeenCalled();
   });
+
+  test('timestamp is formatted as ISO-8601 by default', () => {
+    const fn = vi.fn();
+    console.log = fn;
+
+    adze.timestamp.log('Log with ISO-8601 timestamp.');
+
+    expect(console.log).toHaveBeenCalledTimes(1);
+
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+    const timestamp = fn.mock.calls[0][2];
+    expect(timestamp).toMatch(/\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d/);
+  });
 });