initial commit: scaffolding

1 files changed, 60 insertions, 0 deletions

diff --git a/node_modules/date-fns/differenceInCalendarWeeks/index.js b/node_modules/date-fns/differenceInCalendarWeeks/index.js
new file mode 100644
index 0000000..486e895
--- /dev/null
+++ b/node_modules/date-fns/differenceInCalendarWeeks/index.js
@@ -0,0 +1,60 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = differenceInCalendarWeeks;
+var _index = _interopRequireDefault(require("../startOfWeek/index.js"));
+var _index2 = _interopRequireDefault(require("../_lib/getTimezoneOffsetInMilliseconds/index.js"));
+var _index3 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
+var MILLISECONDS_IN_WEEK = 604800000;
+
+/**
+ * @name differenceInCalendarWeeks
+ * @category Week Helpers
+ * @summary Get the number of calendar weeks between the given dates.
+ *
+ * @description
+ * Get the number of calendar weeks between the given dates.
+ *
+ * @param {Date|Number} dateLeft - the later date
+ * @param {Date|Number} dateRight - the earlier date
+ * @param {Object} [options] - an object with options.
+ * @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
+ * @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
+ * @returns {Number} the number of calendar weeks
+ * @throws {TypeError} 2 arguments required
+ * @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
+ *
+ * @example
+ * // How many calendar weeks are between 5 July 2014 and 20 July 2014?
+ * const result = differenceInCalendarWeeks(
+ *   new Date(2014, 6, 20),
+ *   new Date(2014, 6, 5)
+ * )
+ * //=> 3
+ *
+ * @example
+ * // If the week starts on Monday,
+ * // how many calendar weeks are between 5 July 2014 and 20 July 2014?
+ * const result = differenceInCalendarWeeks(
+ *   new Date(2014, 6, 20),
+ *   new Date(2014, 6, 5),
+ *   { weekStartsOn: 1 }
+ * )
+ * //=> 2
+ */
+function differenceInCalendarWeeks(dirtyDateLeft, dirtyDateRight, options) {
+  (0, _index3.default)(2, arguments);
+  var startOfWeekLeft = (0, _index.default)(dirtyDateLeft, options);
+  var startOfWeekRight = (0, _index.default)(dirtyDateRight, options);
+  var timestampLeft = startOfWeekLeft.getTime() - (0, _index2.default)(startOfWeekLeft);
+  var timestampRight = startOfWeekRight.getTime() - (0, _index2.default)(startOfWeekRight);
+
+  // Round the number of days to the nearest integer
+  // because the number of milliseconds in a week is not constant
+  // (e.g. it's different in the week of the daylight saving time clock shift)
+  return Math.round((timestampLeft - timestampRight) / MILLISECONDS_IN_WEEK);
+}
+module.exports = exports.default;
\ No newline at end of file