1 files changed, 90 insertions, 0 deletions
diff --git a/server/sonar-web/src/main/js/helpers/dates.ts b/server/sonar-web/src/main/js/helpers/dates.ts
new file mode 100644
index 00000000000..5bbb50b3bff
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+++ b/server/sonar-web/src/main/js/helpers/dates.ts
@@ -0,0 +1,90 @@
+/*
+ * SonarQube
+ * Copyright (C) 2009-2017 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+const MILLISECONDS_IN_MINUTE = 60 * 1000;
+const MILLISECONDS_IN_DAY = MILLISECONDS_IN_MINUTE * 60 * 24;
+
+function pad(number: number) {
+  if (number < 10) {
+    return '0' + number;
+  }
+  return number;
+}
+
+function compareDateAsc(dateLeft: Date, dateRight: Date): number {
+  var timeLeft = dateLeft.getTime();
+  var timeRight = dateRight.getTime();
+
+  if (timeLeft < timeRight) {
+    return -1;
+  } else if (timeLeft > timeRight) {
+    return 1;
+  } else {
+    return 0;
+  }
+}
+
+export function toShortNotSoISOString(date: Date): string {
+  return date.getFullYear() + '-' + pad(date.getMonth() + 1) + '-' + pad(date.getDate());
+}
+
+export function toNotSoISOString(date: Date): string {
+  return date.toISOString().replace(/\..+Z$/, '+0000');
+}
+
+export function startOfDay(date: Date): Date {
+  const startDay = new Date(date);
+  startDay.setHours(0, 0, 0, 0);
+  return startDay;
+}
+
+export function isValidDate(date: Date): boolean {
+  return !isNaN(date.getTime());
+}
+
+export function isSameDay(dateLeft: Date, dateRight: Date): boolean {
+  const startDateLeft = startOfDay(dateLeft);
+  const startDateRight = startOfDay(dateRight);
+  return startDateLeft.getTime() === startDateRight.getTime();
+}
+
+export function differenceInYears(dateLeft: Date, dateRight: Date): number {
+  const sign = compareDateAsc(dateLeft, dateRight);
+  const diff = Math.abs(dateLeft.getFullYear() - dateRight.getFullYear());
+  const tmpLeftDate = new Date(dateLeft);
+  tmpLeftDate.setFullYear(dateLeft.getFullYear() - sign * diff);
+  const isLastYearNotFull = compareDateAsc(tmpLeftDate, dateRight) === -sign;
+  return sign * (diff - (isLastYearNotFull ? 1 : 0));
+}
+
+export function differenceInDays(dateLeft: Date, dateRight: Date): number {
+  const startDateLeft = startOfDay(dateLeft);
+  const startDateRight = startOfDay(dateRight);
+  const timestampLeft =
+    startDateLeft.getTime() - startDateLeft.getTimezoneOffset() * MILLISECONDS_IN_MINUTE;
+  const timestampRight =
+    startDateRight.getTime() - startDateRight.getTimezoneOffset() * MILLISECONDS_IN_MINUTE;
+  return Math.round((timestampLeft - timestampRight) / MILLISECONDS_IN_DAY);
+}
+
+export function differenceInSeconds(dateLeft: Date, dateRight: Date): number {
+  const diff = (dateLeft.getTime() - dateRight.getTime()) / 1000;
+  return diff > 0 ? Math.floor(diff) : Math.ceil(diff);
+}