From 849f83ed03430ba8637a840889e03147f050e517 Mon Sep 17 00:00:00 2001
From: Alex Tselegidis <alextselegidis@gmail.com>
Date: Sun, 29 Mar 2020 15:08:07 +0200
Subject: [PATCH] Backend calendar handling with timezones.

---
 application/controllers/Backend_api.php       | 19 ++++--
 application/models/Timezones_model.php        |  3 +
 application/views/backend/calendar.php        | 61 ++++++++++++++++++-
 .../views/partial/timezone_dropdown.php       |  1 -
 .../js/backend_calendar_appointments_modal.js | 24 ++++++--
 assets/js/backend_calendar_default_view.js    | 10 +++
 6 files changed, 107 insertions(+), 11 deletions(-)

diff --git a/application/controllers/Backend_api.php b/application/controllers/Backend_api.php
index f012f616..c755bbed 100755
--- a/application/controllers/Backend_api.php
+++ b/application/controllers/Backend_api.php
@@ -11,9 +11,9 @@
  * @since       v1.0.0
  * ---------------------------------------------------------------------------- */
 
-use \EA\Engine\Types\Text;
-use \EA\Engine\Types\Email;
-use \EA\Engine\Types\Url;
+use EA\Engine\Types\Email;
+use EA\Engine\Types\Text;
+use EA\Engine\Types\Url;
 
 /**
  * Backend API Controller
@@ -102,7 +102,7 @@ class Backend_api extends CI_Controller {
             $userId = $this->session->userdata('user_id');
             $roleSlug = $this->session->userdata('role_slug');
 
-            // If the current user is a provider he must only see his own appointments. 
+            // If the current user is a provider he must only see his own appointments.
             if ($roleSlug === DB_SLUG_PROVIDER)
             {
                 foreach ($response['appointments'] as $index => $appointment)
@@ -261,6 +261,7 @@ class Backend_api extends CI_Controller {
             $this->load->model('services_model');
             $this->load->model('customers_model');
             $this->load->model('settings_model');
+            $this->load->model('timezones_model');
 
             // :: SAVE CUSTOMER CHANGES TO DATABASE
             if ($this->input->post('customer_data'))
@@ -299,6 +300,16 @@ class Backend_api extends CI_Controller {
                     $appointment['id_users_customer'] = $customer['id'];
                 }
 
+                $provider_timezone = $this->timezones_model->get_user_timezone($appointment['id_users_provider']);
+
+                $session_timezone = $this->timezones_model->get_session_timezone();
+
+                $appointment['start_datetime'] = $this->timezones_model->convert($appointment['start_datetime'],
+                    $session_timezone, $provider_timezone);
+
+                $appointment['end_datetime'] = $this->timezones_model->convert($appointment['end_datetime'],
+                    $session_timezone, $provider_timezone);
+
                 $appointment['id'] = $this->appointments_model->add($appointment);
             }
 
diff --git a/application/models/Timezones_model.php b/application/models/Timezones_model.php
index d19833a9..bb40494b 100644
--- a/application/models/Timezones_model.php
+++ b/application/models/Timezones_model.php
@@ -26,6 +26,9 @@ class Timezones_Model extends CI_Model {
      * @var array
      */
     protected $timezones = [
+        'UTC' => [
+            'UTC' => 'UTC'
+        ],
         'America' => [
             'America/Adak' => 'Adak -10:00',
             'America/Atka' => 'Atka -10:00',
diff --git a/application/views/backend/calendar.php b/application/views/backend/calendar.php
index 04a81b87..7a8bbb0b 100755
--- a/application/views/backend/calendar.php
+++ b/application/views/backend/calendar.php
@@ -187,6 +187,11 @@
                                     <label for="appointment-location" class="control-label"><?= lang('location') ?></label>
                                     <input id="appointment-location" class="form-control">
                                 </div>
+
+                                <div class="form-group">
+                                    <label for="appointment-notes" class="control-label"><?= lang('notes') ?></label>
+                                    <textarea id="appointment-notes" class="form-control" rows="3"></textarea>
+                                </div>
                             </div>
 
                             <div class="col-xs-12 col-sm-6">
@@ -201,8 +206,22 @@
                                 </div>
 
                                 <div class="form-group">
-                                    <label for="appointment-notes" class="control-label"><?= lang('notes') ?></label>
-                                    <textarea id="appointment-notes" class="form-control" rows="1"></textarea>
+                                    <label class="control-label"><?= lang('timezone') ?></label>
+
+                                    <ul>
+                                        <li>
+                                            <?= lang('provider') ?>:
+                                            <span class="provider-timezone">
+                                                -
+                                            </span>
+                                        </li>
+                                        <li>
+                                            <?= lang('current_user') ?>:
+                                            <span>
+                                                <?= $timezones[$timezone] ?>
+                                            </span>
+                                        </li>
+                                    </ul>
                                 </div>
                             </div>
                         </div>
@@ -316,6 +335,25 @@
                             <input id="unavailable-end" class="form-control">
                         </div>
 
+                        <div class="form-group">
+                            <label class="control-label"><?= lang('timezone') ?></label>
+
+                            <ul>
+                                <li>
+                                    <?= lang('provider') ?>:
+                                    <span class="provider-timezone">
+                                        -
+                                    </span>
+                                </li>
+                                <li>
+                                    <?= lang('current_user') ?>:
+                                    <span>
+                                        <?= $timezones[$timezone] ?>
+                                    </span>
+                                </li>
+                            </ul>
+                        </div>
+
                         <div class="form-group">
                             <label for="unavailable-notes" class="control-label"><?= lang('notes') ?></label>
                             <textarea id="unavailable-notes" rows="3" class="form-control"></textarea>
@@ -361,6 +399,25 @@
                             <label for="extra-end" class="control-label"><?= lang('end') ?></label>
                             <input id="extra-end" class="form-control">
                         </div>
+
+                        <div class="form-group">
+                            <label class="control-label"><?= lang('timezone') ?></label>
+
+                            <ul>
+                                <li>
+                                    <?= lang('provider') ?>:
+                                    <span class="provider-timezone">
+                                        -
+                                    </span>
+                                </li>
+                                <li>
+                                    <?= lang('current_user') ?>:
+                                    <span>
+                                        <?= $timezones[$timezone] ?>
+                                    </span>
+                                </li>
+                            </ul>
+                        </div>
                     </fieldset>
                 </form>
             </div>
diff --git a/application/views/partial/timezone_dropdown.php b/application/views/partial/timezone_dropdown.php
index fc53d7f3..77a34ec2 100644
--- a/application/views/partial/timezone_dropdown.php
+++ b/application/views/partial/timezone_dropdown.php
@@ -1,5 +1,4 @@
 <select <?= $attributes ?>>
-    <option value="UTC">UTC</option>
     <?php foreach ($timezones as $continent => $entries): ?>
         <optgroup label="<?= $continent ?>">
             <?php foreach ($entries as $value => $name): ?>
diff --git a/assets/js/backend_calendar_appointments_modal.js b/assets/js/backend_calendar_appointments_modal.js
index 98b7c459..6b88cd7c 100755
--- a/assets/js/backend_calendar_appointments_modal.js
+++ b/assets/js/backend_calendar_appointments_modal.js
@@ -22,6 +22,18 @@ window.BackendCalendarAppointmentsModal = window.BackendCalendarAppointmentsModa
 
     'use strict';
 
+    function _updateTimezone() {
+        var providerId = $('#select-provider').val();
+
+        var provider  = GlobalVariables.availableProviders.filter(function(availableProvider) {
+            return availableProvider.id == providerId;
+        }).shift();
+
+        if (provider && provider.timezone) {
+            $('.provider-timezone').text(GlobalVariables.timezones[provider.timezone]);
+        }
+    }
+
     function _bindEventHandlers() {
         /**
          * Event: Manage Appointments Dialog Cancel Button "Click"
@@ -318,10 +330,14 @@ window.BackendCalendarAppointmentsModal = window.BackendCalendarAppointmentsModa
                 });
             });
         });
-        // If the appointment is opened from a link it triggers the previous function to fill the form
-        if (window.location.href.indexOf("backend/index/") > -1) {
-        $('#select-service').change();
-        }
+
+        /**
+         * Event: Provider "Change"
+         */
+        $('#select-provider').change(function () {
+            _updateTimezone();
+        });
+
         /**
          * Event: Enter New Customer Button "Click"
          */
diff --git a/assets/js/backend_calendar_default_view.js b/assets/js/backend_calendar_default_view.js
index ec67ee76..1db1bcba 100755
--- a/assets/js/backend_calendar_default_view.js
+++ b/assets/js/backend_calendar_default_view.js
@@ -256,6 +256,16 @@ window.BackendCalendarDefaultView = window.BackendCalendarDefaultView || {};
                 $('#calendar').fullCalendar('option', 'selectable', true);
                 $('#calendar').fullCalendar('option', 'editable', true);
 
+                var providerId = $('#select-filter-item').val();
+
+                var provider = GlobalVariables.availableProviders.filter(function(availableProvider) {
+                    return availableProvider.id == providerId;
+                }).shift();
+
+                if (provider && provider.timezone) {
+                    $('.provider-timezone').text(GlobalVariables.timezones[provider.timezone]);
+                }
+
                 // If the user has already the sync enabled then apply the proper style changes.
                 if ($('#select-filter-item option:selected').attr('google-sync') === 'true') {
                     $('#enable-sync').addClass('btn-danger enabled');