Tracking de l'application VApp (IHM du jeu)

VApp/node_modules/date-fns/esm/differenceInMonths/index.js

@@ -0,0 +1,56 @@
+import toDate from "../toDate/index.js";
+import differenceInCalendarMonths from "../differenceInCalendarMonths/index.js";
+import compareAsc from "../compareAsc/index.js";
+import requiredArgs from "../_lib/requiredArgs/index.js";
+import isLastDayOfMonth from "../isLastDayOfMonth/index.js";
+/**
+ * @name differenceInMonths
+ * @category Month Helpers
+ * @summary Get the number of full months between the given dates.
+ *
+ * @description
+ * Get the number of full months between the given dates using trunc as a default rounding method.
+ *
+ * @param {Date|Number} dateLeft - the later date
+ * @param {Date|Number} dateRight - the earlier date
+ * @returns {Number} the number of full months
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // How many full months are between 31 January 2014 and 1 September 2014?
+ * const result = differenceInMonths(new Date(2014, 8, 1), new Date(2014, 0, 31))
+ * //=> 7
+ */
+export default function differenceInMonths(dirtyDateLeft, dirtyDateRight) {
+  requiredArgs(2, arguments);
+  var dateLeft = toDate(dirtyDateLeft);
+  var dateRight = toDate(dirtyDateRight);
+  var sign = compareAsc(dateLeft, dateRight);
+  var difference = Math.abs(differenceInCalendarMonths(dateLeft, dateRight));
+  var result;
+
+  // Check for the difference of less than month
+  if (difference < 1) {
+    result = 0;
+  } else {
+    if (dateLeft.getMonth() === 1 && dateLeft.getDate() > 27) {
+      // This will check if the date is end of Feb and assign a higher end of month date
+      // to compare it with Jan
+      dateLeft.setDate(30);
+    }
+    dateLeft.setMonth(dateLeft.getMonth() - sign * difference);
+
+    // Math.abs(diff in full months - diff in calendar months) === 1 if last calendar month is not full
+    // If so, result must be decreased by 1 in absolute value
+    var isLastMonthNotFull = compareAsc(dateLeft, dateRight) === -sign;
+
+    // Check for cases of one full calendar month
+    if (isLastDayOfMonth(toDate(dirtyDateLeft)) && difference === 1 && compareAsc(dirtyDateLeft, dateRight) === 1) {
+      isLastMonthNotFull = false;
+    }
+    result = sign * (difference - Number(isLastMonthNotFull));
+  }
+
+  // Prevent negative zero
+  return result === 0 ? 0 : result;
+}