Fix now indicator in fullcalendar views (AKPlan) for users from other timezones

This is done by generating the "now" timestamp from python instead of JavaScript using a newly created templatetag
The new "now" function is used in all AKPlan calendar views as well as in AKScheduling's scheduler view

AKPlan/templates/AKPlan/plan_akslot.html

 {% load static %}
 {% load tz %}
 {% load i18n %}
+{% load tags_AKPlan %}
 
 {% include "AKPlan/load_fullcalendar.html" %}
 
@@ -27,6 +28,7 @@
             scrollTime: '08:00:00',
             allDaySlot: false,
             nowIndicator: true,
+            now: "{% timestamp_now event.timezone %}",
             eventTextColor: '#fff',
             eventColor: '#127ba3',
             // Create entries for all scheduled slots

AKPlan/templates/AKPlan/plan_detail.html

@@ -4,6 +4,7 @@
 {% load i18n %}
 {% load static %}
 {% load tz %}
+{% load tags_AKPlan %}
 
 
 {% block fullcalendar %}
@@ -36,6 +37,7 @@
                     scrollTime: '08:00:00',
                     allDaySlot: false,
                     nowIndicator: true,
+                    now: "{% timestamp_now event.timezone %}",
                     eventTextColor: '#fff',
                     eventColor: '#127ba3',
                     // Create entries for all scheduled slots

AKPlan/templates/AKPlan/plan_index.html

@@ -4,6 +4,7 @@
 {% load i18n %}
 {% load static %}
 {% load tz %}
+{% load tags_AKPlan %}
 
 
 {% block fullcalendar %}
@@ -47,6 +48,7 @@
                     editable: false,
                     allDaySlot: false,
                     nowIndicator: true,
+                    now: "{% timestamp_now event.timezone %}",
                     eventTextColor: '#fff',
                     eventColor: '#127ba3',
                     resourceAreaWidth: '15%',

AKPlan/templates/AKPlan/plan_wall.html

@@ -3,6 +3,7 @@
 {% load bootstrap4 %}
 {% load fontawesome_5 %}
 {% load tags_AKModel %}
+{% load tags_AKPlan %}
 {% load tz %}
 
 
@@ -43,6 +44,7 @@
                 editable: false,
                 allDaySlot: false,
                 nowIndicator: true,
+                now: "{% timestamp_now event.timezone %}",
                 eventTextColor: '#fff',
                 eventColor: '#127ba3',
                 height: '90%',

AKPlan/templatetags/tags_AKPlan.py

+from datetime import datetime
+
 from django import template
+from django.utils.formats import date_format
 
 from AKPlan.templatetags.color_gradients import darken
 from AKPlanning import settings
@@ -18,3 +21,8 @@ def highlight_change_colors(akslot):
     recentness = seconds_since_update / settings.PLAN_MAX_HIGHLIGHT_UPDATE_SECONDS
     return darken("#b71540", recentness)
     # return linear_blend("#b71540", "#000000", recentness)
+
+
+@register.simple_tag
+def timestamp_now(tz):
+    return date_format(datetime.now().astimezone(tz), "c")

AKScheduling/templates/admin/AKScheduling/scheduling.html

@@ -138,6 +138,7 @@
                 },
                 allDaySlot: false,
                 nowIndicator: true,
+                now: "{% timestamp_now event.timezone %}",
                 eventTextColor: '#fff',
                 eventColor: '#127ba3',
                 eventBackgroundColor: '#28B62C',