Adds timezone field to events

app/controllers/admin/events_controller.rb

@@ -3,7 +3,7 @@ class Admin::EventsController < Admin::ApplicationController
   before_action :find_event, only: %i[edit update]
 
   def new
-    @event = Event.new
+    @event = Event.new(timezone: 'London')
   end
 
   def create
@@ -74,7 +74,7 @@ def set_event
   def event_params
     params.require(:event).permit(
       :virtual, :name, :slug, :date_and_time, :begins_at, :ends_at, :description, :info, :schedule, :venue_id,
-      :external_url, :coach_spaces, :student_spaces, :email, :announce_only, :tito_url, :invitable,
+      :external_url, :coach_spaces, :student_spaces, :email, :announce_only, :tito_url, :invitable, :timezone,
       :student_questionnaire, :confirmation_required, :surveys_required, :audience, :coach_questionnaire,
       :show_faq, :display_coaches, :display_students, bronze_sponsor_ids: [], silver_sponsor_ids: [],
                                                       gold_sponsor_ids: [], sponsor_ids: [], chapter_ids: []

app/models/event.rb

@@ -101,7 +101,7 @@ def sponsors?(level = nil)
   private
 
   def time_zone
-    'London'
+    timezone || 'London'
   end
 
   def duplicated_sponsors

app/views/admin/events/_form.html.haml

@@ -8,10 +8,13 @@
       = f.input :slug, placeholder: 'for URI, e.g. 24-pull-requests'
     .col-12
       = f.input :date_and_time, as: :string, required: true, label: 'Date'
-    .col-12.col-md-6
+    .col-12.col-md-4
       = f.input :begins_at, as: :string, required: true
-    .col-12.col-md-6
+    .col-12.col-md-4
       = f.input :ends_at, as: :string, required: true
+    .col-12.col-md-4
+      %label.form-check-label{ for: "event_timezone" } Time zone
+      = f.time_zone_select :timezone
     .col-12
       = f.input :description, as: :text, input_html: { rows: 3 },
       hint: 'Use this space to write an invitation message and description of the event. This copy will also be used in the email invitation. You can use HTML here!'

app/views/admin/events/edit.html.haml

@@ -15,10 +15,13 @@
             = f.input :slug
           .col-12
             = f.input :date_and_time, as: :string, required: true, label: 'Date', input_html: { data: { value: @event.date_and_time.strftime('%d/%m/%Y') } }
-          .col-12.col-md-6
+          .col-12.col-md-4
             = f.input :begins_at, as: :string, required: true, input_html: { data: { value: @event.date_and_time.time.strftime('%H:%M') }}
-          .col-6.col-md-6
+          .col-12.col-md-4
             = f.input :ends_at, as: :string, required: true, input_html: { data: { value: @event.ends_at.strftime('%H:%M') }}
+          .col-12.col-md-4
+            %label.form-check-label{ for: "event_timezone" } Time zone
+            = f.time_zone_select :timezone
           .col-12
             = f.input :description, as: :text, input_html: { rows: 3 },
             hint: 'Use this space to write an invitation message and description of the event. This copy will also be used in the email invitation. You can use HTML here!'