Uniformize folder structure (#693)

* Uniformize folder structure

* Fix icons

* Fix icons

* Fix tests

* Fix tests

front/src/utils/date-utils.ts

@@ -0,0 +1,75 @@
+import { formatDistanceToNow } from 'date-fns';
+import { DateTime } from 'luxon';
+
+import { logError } from './logError';
+
+export const DEFAULT_DATE_LOCALE = 'en-EN';
+
+export function parseDate(dateToParse: Date | string | number) {
+  let formattedDate: DateTime | null = null;
+
+  if (!dateToParse) {
+    throw new Error(`Invalid date passed to formatPastDate: "${dateToParse}"`);
+  } else if (typeof dateToParse === 'string') {
+    formattedDate = DateTime.fromISO(dateToParse);
+  } else if (dateToParse instanceof Date) {
+    formattedDate = DateTime.fromJSDate(dateToParse);
+  } else if (typeof dateToParse === 'number') {
+    formattedDate = DateTime.fromMillis(dateToParse);
+  }
+
+  if (!formattedDate) {
+    throw new Error(`Invalid date passed to formatPastDate: "${dateToParse}"`);
+  }
+
+  if (!formattedDate.isValid) {
+    throw new Error(`Invalid date passed to formatPastDate: "${dateToParse}"`);
+  }
+
+  return formattedDate.setLocale(DEFAULT_DATE_LOCALE);
+}
+
+export function beautifyExactDate(dateToBeautify: Date | string | number) {
+  try {
+    const parsedDate = parseDate(dateToBeautify);
+
+    return parsedDate.toFormat('DD · TT');
+  } catch (error) {
+    logError(error);
+    return '';
+  }
+}
+
+export function beautifyPastDateRelativeToNow(
+  pastDate: Date | string | number,
+) {
+  try {
+    const parsedDate = parseDate(pastDate);
+
+    return formatDistanceToNow(parsedDate.toJSDate());
+  } catch (error) {
+    logError(error);
+    return '';
+  }
+}
+
+export function beautifyPastDateAbsolute(pastDate: Date | string | number) {
+  try {
+    const parsedPastDate = parseDate(pastDate);
+
+    const hoursDiff = parsedPastDate.diffNow('hours').negate().hours;
+
+    if (hoursDiff <= 24) {
+      return parsedPastDate.toFormat('HH:mm');
+    } else if (hoursDiff <= 7 * 24) {
+      return parsedPastDate.toFormat('cccc - HH:mm');
+    } else if (hoursDiff <= 365 * 24) {
+      return parsedPastDate.toFormat('MMMM d - HH:mm');
+    } else {
+      return parsedPastDate.toFormat('dd/MM/yyyy - HH:mm');
+    }
+  } catch (error) {
+    logError(error);
+    return '';
+  }
+}