From 7704fc1223a1c2a59d8cc6b35dc830d9e5826971 Mon Sep 17 00:00:00 2001
From: Alex Tselegidis <alextselegidis@gmail.com>
Date: Tue, 11 Jan 2022 10:51:29 +0100
Subject: [PATCH] Move general functions methods to the date util.

---
 assets/js/utils/date.js | 125 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 124 insertions(+), 1 deletion(-)

diff --git a/assets/js/utils/date.js b/assets/js/utils/date.js
index 4a252bbe..a276d371 100644
--- a/assets/js/utils/date.js
+++ b/assets/js/utils/date.js
@@ -64,7 +64,130 @@ window.App.Utils.Date = (function () {
         return dateMoment.format(format);
     }
 
+    /**
+     * Get the Id of a Weekday using the US week format and day names (Sunday=0) as used in the JS code of the
+     * application, case insensitive, short and long names supported.
+     *
+     * @param {String} weekDayName The weekday name among Sunday, Monday, Tuesday, Wednesday, Thursday, Friday,
+     * Saturday.
+
+     * @return {Number} Returns the ID of the weekday.
+     */
+    function getWeekDayId(weekDayName) {
+        let result;
+
+        switch (weekDayName.toLowerCase()) {
+            case 'sunday':
+            case 'sun':
+                result = 0;
+                break;
+
+            case 'monday':
+            case 'mon':
+                result = 1;
+                break;
+
+            case 'tuesday':
+            case 'tue':
+                result = 2;
+                break;
+
+            case 'wednesday':
+            case 'wed':
+                result = 3;
+                break;
+
+            case 'thursday':
+            case 'thu':
+                result = 4;
+                break;
+
+            case 'friday':
+            case 'fri':
+                result = 5;
+                break;
+
+            case 'saturday':
+            case 'sat':
+                result = 6;
+                break;
+
+            default:
+                throw new Error(`Invalid weekday name provided: ${weekDayName}`);
+        }
+
+        return result;
+    }
+
+    /**
+     * Sort a dictionary where keys are weekdays
+     *
+     * @param {Object} weekDictionary A dictionary with weekdays as keys.
+     * @param {Number} startDayId Id of the first day to start sorting (From 0 for sunday to 6 for saturday).
+
+     * @return {Object} Returns a sorted dictionary
+     */
+    function sortWeekDictionary(weekDictionary, startDayId) {
+        const sortedWeekDictionary = {};
+
+        for (let i = startDayId; i < startDayId + 7; i++) {
+            const weekdayName = getWeekdayName(i % 7);
+            sortedWeekDictionary[weekdayName] = weekDictionary[weekdayName];
+        }
+
+        return sortedWeekDictionary;
+    }
+
+    /**
+     * Get the name in lowercase of a Weekday using its Id.
+     *
+     * @param {Number} weekDayId The Id (From 0 for sunday to 6 for saturday).
+
+     * @return {String} Returns the name of the weekday.
+     */
+    function getWeekdayName(weekDayId) {
+        let result;
+
+        switch (weekDayId) {
+            case 0:
+                result = 'sunday';
+                break;
+
+            case 1:
+                result = 'monday';
+                break;
+
+            case 2:
+                result = 'tuesday';
+                break;
+
+            case 3:
+                result = 'wednesday';
+                break;
+
+            case 4:
+                result = 'thursday';
+                break;
+
+            case 5:
+                result = 'friday';
+                break;
+
+            case 6:
+                result = 'saturday';
+                break;
+
+            default:
+                throw new Error(`Invalid weekday Id provided: ${weekDayId}`);
+        }
+
+        return result;
+    }
+
     return {
-        format
+        format,
+        getWeekDayId,
+        sortWeekDictionary,
+        getWeekdayName
     };
 })();