From 3061827f467921a856bd4629bf21ac6cb185e4f2 Mon Sep 17 00:00:00 2001
From: Jhonis de Souza <jhonis.souza@gmail.com>
Date: Mon, 8 Feb 2016 19:04:39 -0200
Subject: [PATCH] First day of the Week #10

- The calendar now has an option (firstDayOfWeek) to determine what day is the first, this option comes from 0 to 6, in which 0 is the Sunday and 6 is Saturday.
---
 README.md               |  6 ++++--
 js/jquery.e-calendar.js | 17 +++++++++++++----
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/README.md b/README.md
index af3dbae..2f2a424 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,8 @@ url: '',
 events: [
     {title: 'Event Title 1', description: 'Description 1', datetime: new Date(2016, 0, 12, 17)},
     {title: 'Event Title 2', description: 'Description 2', datetime: new Date(2016, 0, 23, 16)}
-]
+],
+firstDayOfWeek: 0
 ```
 ####Event Object Properties
 ```JavaScript
@@ -38,7 +39,8 @@ $('#calendar').eCalendar({
 });
 
 $('#calendar').eCalendar({url: 'loadCalendar',
-                          weekDays: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']});
+                          weekDays: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
+                          firstDayOfWeek: 1}); // calendar starting on monday | (0 - 6: week days format)
 ```
 
 PS: remember that in date object instantiation, like the code below, the month starts from 0 to 11 and generate a date: 31/01/2016
diff --git a/js/jquery.e-calendar.js b/js/jquery.e-calendar.js
index 4a18ebe..337791b 100644
--- a/js/jquery.e-calendar.js
+++ b/js/jquery.e-calendar.js
@@ -87,7 +87,10 @@
 
         function print() {
             loadEvents();
-            var dWeekDayOfMonthStart = new Date(dYear, dMonth, 1).getDay();
+            var dWeekDayOfMonthStart = new Date(dYear, dMonth, 1).getDay() - settings.firstDayOfWeek;
+            if (dWeekDayOfMonthStart < 0) {
+                dWeekDayOfMonthStart = 6 - ((dWeekDayOfMonthStart + 1) * -1);
+            }
             var dLastDayOfMonth = new Date(dYear, dMonth + 1, 0).getDate();
             var dLastDayOfPreviousMonth = new Date(dYear, dMonth + 1, 0).getDate() - dWeekDayOfMonthStart + 1;
 
@@ -109,10 +112,15 @@
             cBody.append(cPrevious);
             cBody.append(cMonth);
             cBody.append(cNext);
-            for (var i = 0; i < settings.weekDays.length; i++) {
+            var dayOfWeek = settings.firstDayOfWeek;
+            for (var i = 0; i < 7; i++) {
+                if (dayOfWeek > 6) {
+                    dayOfWeek = 0;
+                }
                 var cWeekDay = $('<div/>').addClass('c-week-day c-pad-top');
-                cWeekDay.html(settings.weekDays[i]);
+                cWeekDay.html(settings.weekDays[dayOfWeek]);
                 cBody.append(cWeekDay);
+                dayOfWeek++;
             }
             var day = 1;
             var dayOfNextMonth = 1;
@@ -179,7 +187,8 @@
             {title: 'Evento de Abertura', description: 'Abertura das Olimpíadas Rio 2016', datetime: new Date(2016, new Date().getMonth(), 12, 17)},
             {title: 'Tênis de Mesa', description: 'BRA x ARG - Semifinal', datetime: new Date(2016, new Date().getMonth(), 23, 16)},
             {title: 'Ginástica Olímpica', description: 'Classificatórias de equipes', datetime: new Date(2016, new Date().getMonth(), 31, 16)}
-        ]
+        ],
+        firstDayOfWeek: 0
     };
 
 }(jQuery));
\ No newline at end of file