easyappointments/application/controllers/Appointments.php

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<?php defined('BASEPATH') or exit('No direct script access allowed');
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/* ----------------------------------------------------------------------------
* Easy!Appointments - Open Source Web Scheduler
*
* @package EasyAppointments
* @author A.Tselegidis <alextselegidis@gmail.com>
* @copyright Copyright (c) 2013 - 2020, Alex Tselegidis
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* @license https://opensource.org/licenses/GPL-3.0 - GPLv3
* @link https://easyappointments.org
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* @since v1.0.0
* ---------------------------------------------------------------------------- */
/**
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* Appointments controller.
*
* Handles the appointment related operations.
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*
* @package Controllers
*/
class Appointments extends EA_Controller {
/**
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* Appointments constructor.
*/
public function __construct()
{
parent::__construct();
$this->load->model('appointments_model');
$this->load->model('providers_model');
$this->load->model('admins_model');
$this->load->model('secretaries_model');
$this->load->model('service_categories_model');
$this->load->model('services_model');
$this->load->model('customers_model');
$this->load->model('settings_model');
$this->load->library('timezones');
$this->load->library('synchronization');
$this->load->library('notifications');
$this->load->library('availability');
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$this->load->driver('cache', ['adapter' => 'file']);
}
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/**
* Default callback method of the application.
*
* This method creates the appointment book wizard. If an appointment hash is provided then it means that the
* customer followed the appointment manage link that was sent with the book success email.
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*
* @param string $appointment_hash The appointment hash identifier.
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*/
public function index(string $appointment_hash = '')
{
if ( ! is_app_installed())
{
redirect('installation');
return;
}
$available_services = $this->services_model->get_available_services();
$available_providers = $this->providers_model->get_available_providers();
$company_name = setting('company_name');
$book_advance_timeout = setting('book_advance_timeout');
$date_format = setting('date_format');
$time_format = setting('time_format');
$first_weekday = setting('first_weekday');
$require_phone_number = setting('require_phone_number');
$show_field['phone-number'] = setting('show_phone_number');
$show_field['address'] = setting('show_address');
$show_field['city'] = setting('show_city');
$show_field['zip-code'] = setting('show_zip_code');
$show_field['notes'] = setting('show_notes');
$display_cookie_notice = setting('display_cookie_notice');
$cookie_notice_content = setting('cookie_notice_content');
$display_terms_and_conditions = setting('display_terms_and_conditions');
$terms_and_conditions_content = setting('terms_and_conditions_content');
$display_privacy_policy = setting('display_privacy_policy');
$privacy_policy_content = setting('privacy_policy_content');
$display_any_provider = setting('display_any_provider');
$timezones = $this->timezones->to_array();
// Remove the data that are not needed inside the $available_providers array.
foreach ($available_providers as &$available_provider)
{
$this->providers_model->only($available_provider, [
'id',
'first_name',
'last_name',
'services',
'timezone'
]);
}
// If an appointment hash is provided then it means that the customer is trying to edit a registered appointment
// record.
if ($appointment_hash !== '')
{
// Load the appointments data and enable the manage mode of the page.
$manage_mode = TRUE;
$results = $this->appointments_model->get(['hash' => $appointment_hash]);
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if (empty($results))
{
// The requested appointment was not found in the database.
$this->load->view('pages/booking/booking_message_page', [
'message_title' => lang('appointment_not_found'),
'message_text' => lang('appointment_does_not_exist_in_db'),
'message_icon' => base_url('assets/img/error.png')
]);
return;
}
// If the requested appointment begin date is lower than book_advance_timeout. Display a message to the
// customer.
$start_datetime = strtotime($results[0]['start_datetime']);
$limit = strtotime('+' . $book_advance_timeout . ' minutes', strtotime('now'));
if ($start_datetime < $limit)
{
$hours = floor($book_advance_timeout / 60);
$minutes = ($book_advance_timeout % 60);
$this->load->view('pages/booking/booking_message_page', [
'message_title' => lang('appointment_locked'),
'message_text' => strtr(lang('appointment_locked_message'), [
'{$limit}' => sprintf('%02d:%02d', $hours, $minutes)
]),
'message_icon' => base_url('assets/img/error.png')
]);
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return;
}
$appointment = $results[0];
$provider = $this->providers_model->find($appointment['id_users_provider']);
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$customer = $this->customers_model->find($appointment['id_users_customer']);
$customer_token = md5(uniqid(mt_rand(), TRUE));
// Cache the token for 10 minutes.
$this->cache->save('customer-token-' . $customer_token, $customer['id'], 600);
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}
else
{
// The customer is going to book a new appointment so there is no need for the manage functionality to
// be initialized.
$manage_mode = FALSE;
$customer_token = FALSE;
$appointment = [];
$provider = [];
$customer = [];
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}
$this->load->view('pages/booking/booking_page', [
'available_services' => $available_services,
'available_providers' => $available_providers,
'company_name' => $company_name,
'manage_mode' => $manage_mode,
'customer_token' => $customer_token,
'date_format' => $date_format,
'time_format' => $time_format,
'first_weekday' => $first_weekday,
'require_phone_number' => $require_phone_number,
'show_field' => $show_field,
'appointment_data' => $appointment,
'provider_data' => $provider,
'customer_data' => $customer,
'display_cookie_notice' => $display_cookie_notice,
'cookie_notice_content' => $cookie_notice_content,
'display_terms_and_conditions' => $display_terms_and_conditions,
'terms_and_conditions_content' => $terms_and_conditions_content,
'display_privacy_policy' => $display_privacy_policy,
'privacy_policy_content' => $privacy_policy_content,
'timezones' => $timezones,
'display_any_provider' => $display_any_provider,
]);
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}
/**
* Cancel an existing appointment.
*
* This method removes an appointment from the company's schedule. In order for the appointment to be deleted, the
* hash string must be provided. The customer can only cancel the appointment if the edit time period is not over
* yet.
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*
* @param string $appointment_hash This appointment hash identifier.
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*/
public function cancel(string $appointment_hash)
{
try
{
$exceptions = [];
$occurrences = $this->appointments_model->get(['hash' => $appointment_hash]);
if (empty($occurrences))
{
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throw new Exception('No record matches the provided hash.');
}
$appointment = $occurrences[0];
$provider = $this->providers_model->find($appointment['id_users_provider']);
$customer = $this->customers_model->find($appointment['id_users_customer']);
$service = $this->services_model->find($appointment['id_services']);
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$settings = [
'company_name' => setting('company_name'),
'company_email' => setting('company_email'),
'company_link' => setting('company_link'),
'date_format' => setting('date_format'),
'time_format' => setting('time_format')
];
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$this->appointments_model->delete($appointment['id']);
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$this->synchronization->sync_appointment_deleted($appointment, $provider);
$this->notifications->notify_appointment_deleted($appointment, $service, $provider, $customer, $settings);
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}
catch (Throwable $e)
{
$exceptions[] = $e;
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}
$this->load->view('pages/booking/booking_message_page', [
'message_title' => lang('appointment_cancelled_title'),
'message_text' => lang('appointment_cancelled'),
'message_icon' => base_url('assets/img/success.png'),
'exceptions' => $exceptions
]);
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}
/**
* Display the appointment registration success page.
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*
* @param string $appointment_hash The appointment hash identifier.
*
* @throws Exception
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*/
public function book_success(string $appointment_hash)
{
$occurrences = $this->appointments_model->get(['hash' => $appointment_hash]);
if (empty($occurrences))
{
redirect('appointments'); // The appointment does not exist.
return;
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}
$appointment = $occurrences[0];
unset($appointment['notes']);
$customer = $this->customers_model->find($appointment['id_users_customer']);
$provider = $this->providers_model->find($appointment['id_users_provider']);
$service = $this->services_model->find($appointment['id_services']);
$company_name = setting('company_name');
$exceptions = $this->session->flashdata('book_success') ?? [];
$this->load->view('pages/booking/booking_success_page', [
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'page_title' => lang('success'),
'appointment_data' => $appointment,
'provider_data' => [
'id' => $provider['id'],
'first_name' => $provider['first_name'],
'last_name' => $provider['last_name'],
'email' => $provider['email'],
'timezone' => $provider['timezone'],
],
'customer_data' => [
'id' => $customer['id'],
'first_name' => $customer['first_name'],
'last_name' => $customer['last_name'],
'email' => $customer['email'],
'timezone' => $customer['timezone'],
],
'service_data' => $service,
'company_name' => $company_name,
'exceptions' => $exceptions,
'scripts' => [
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'https://apis.google.com/js/client.js',
asset_url('assets/vendor/datejs/date.min.js'),
asset_url('assets/vendor/moment/moment.min.js'),
asset_url('assets/vendor/moment-timezone/moment-timezone-with-data.min.js'),
asset_url('assets/js/frontend_book_success.js'),
asset_url('assets/js/general_functions.js')
]
]);
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}
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/**
* Get the available appointment hours for the selected date.
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*
* This method answers to an AJAX request. It calculates the available hours for the given service, provider and
* date.
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*/
public function ajax_get_available_hours()
{
try
{
$provider_id = request('provider_id');
$service_id = request('service_id');
$selected_date = request('selected_date');
// Do not continue if there was no provider selected (more likely there is no provider in the system).
if (empty($provider_id))
{
json_response([]);
return;
}
// If manage mode is TRUE then the following we should not consider the selected appointment when
// calculating the available time periods of the provider.
$exclude_appointment_id = request('manage_mode') === 'true' ? request('appointment_id') : NULL;
// If the user has selected the "any-provider" option then we will need to search for an available provider
// that will provide the requested service.
$service = $this->services_model->find($service_id);
if ($provider_id === ANY_PROVIDER)
{
$providers = $this->providers_model->get();
$available_hours = [];
foreach ($providers as $provider)
{
if ( ! in_array($service_id, $provider['services']))
{
continue;
}
$provider_available_hours = $this->availability->get_available_hours($selected_date, $service, $provider, $exclude_appointment_id);
$available_hours = array_merge($available_hours, $provider_available_hours);
}
$response = array_unique(array_values($available_hours));
}
else
{
$provider = $this->providers_model->find($provider_id);
$response = $this->availability->get_available_hours($selected_date, $service, $provider, $exclude_appointment_id);
}
json_response($response);
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}
catch (Throwable $e)
{
json_exception($e);
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}
}
/**
* Search for any provider that can handle the requested service.
*
* This method will return the database ID of the provider with the most available periods.
*
* @param int $service_id Service ID
* @param string $date Selected date (Y-m-d).
* @param string|null $hour Selected hour (H:i).
*
* @return int|null Returns the ID of the provider that can provide the service at the selected date.
*
* @throws Exception
*/
protected function search_any_provider(int $service_id, string $date, string $hour = NULL): ?int
{
$available_providers = $this->providers_model->get_available_providers();
$service = $this->services_model->find($service_id);
$provider_id = NULL;
$max_hours_count = 0;
foreach ($available_providers as $provider)
{
foreach ($provider['services'] as $provider_service_id)
{
if ($provider_service_id == $service_id)
{
// Check if the provider is available for the requested date.
$available_hours = $this->availability->get_available_hours($date, $service, $provider);
if (count($available_hours) > $max_hours_count && (empty($hour) || in_array($hour, $available_hours, FALSE)))
{
$provider_id = $provider['id'];
$max_hours_count = count($available_hours);
}
}
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}
}
return $provider_id;
}
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/**
* Register the appointment to the database.
*/
public function ajax_register_appointment()
{
try
{
$post_data = request('post_data');
$captcha = request('captcha');
$manage_mode = filter_var($post_data['manage_mode'], FILTER_VALIDATE_BOOLEAN);
$appointment = $post_data['appointment'];
$customer = $post_data['customer'];
if ( ! array_key_exists('address', $customer))
{
$customer['address'] = '';
}
if ( ! array_key_exists('city', $customer))
{
$customer['city'] = '';
}
if ( ! array_key_exists('zip_code', $customer))
{
$customer['zip_code'] = '';
}
if ( ! array_key_exists('notes', $customer))
{
$customer['notes'] = '';
}
if ( ! array_key_exists('phone_number', $customer))
{
$customer['address'] = '';
}
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// Check appointment availability before registering it to the database.
$appointment['id_users_provider'] = $this->check_datetime_availability();
if ( ! $appointment['id_users_provider'])
{
throw new Exception(lang('requested_hour_is_unavailable'));
}
$provider = $this->providers_model->find($appointment['id_users_provider']);
$service = $this->services_model->find($appointment['id_services']);
$require_captcha = (bool)setting('require_captcha');
$captcha_phrase = session('captcha_phrase');
// Validate the CAPTCHA string.
if ($require_captcha && $captcha_phrase !== $captcha)
{
json_response([
'captcha_verification' => FALSE
]);
return;
}
if ($this->customers_model->exists($customer))
{
$customer['id'] = $this->customers_model->find_record_id($customer);
}
if (empty($appointment['location']) && ! empty($service['location']))
{
$appointment['location'] = $service['location'];
}
// Save customer language (the language which is used to render the booking page).
$customer['language'] = session('language') ?? config('language');
$customer_id = $this->customers_model->save($customer);
$appointment['id_users_customer'] = $customer_id;
$appointment['is_unavailable'] = (int)$appointment['is_unavailable'];
$appointment['id'] = $this->appointments_model->save($appointment);
$appointment['hash'] = $this->appointments_model->value($appointment['id'], 'hash');
$settings = [
'company_name' => setting('company_name'),
'company_link' => setting('company_link'),
'company_email' => setting('company_email'),
'date_format' => setting('date_format'),
'time_format' => setting('time_format')
];
$this->synchronization->sync_appointment_saved($appointment, $service, $provider, $customer, $settings, $manage_mode);
$this->notifications->notify_appointment_saved($appointment, $service, $provider, $customer, $settings, $manage_mode);
$response = [
'appointment_id' => $appointment['id'],
'appointment_hash' => $appointment['hash']
];
json_response($response);
}
catch (Throwable $e)
{
json_exception($e);
}
}
/**
* Check whether the provider is still available in the selected appointment date.
*
* It is possible that two or more customers select the same appointment date and time concurrently. The app won't
* allow this to happen, so one of the two will eventually get the selected date and the other one will have
* to choose for another one.
*
* Use this method just before the customer confirms the appointment registration. If the selected date was reserved
* in the meanwhile, the customer must be prompted to select another time.
*
* @return int Returns the ID of the provider that is available for the appointment.
*
* @throws Exception
*/
protected function check_datetime_availability(): ?int
{
$post_data = request('post_data');
$appointment = $post_data['appointment'];
$appointment_start = new DateTime($appointment['start_datetime']);
$date = $appointment_start->format('Y-m-d');
$hour = $appointment_start->format('H:i');
if ($appointment['id_users_provider'] === ANY_PROVIDER)
{
$appointment['id_users_provider'] = $this->search_any_provider($appointment['id_services'], $date, $hour);
return $appointment['id_users_provider'];
}
$service = $this->services_model->find($appointment['id_services']);
$exclude_appointment_id = $appointment['id'] ?? NULL;
$provider = $this->providers_model->find($appointment['id_users_provider']);
$available_hours = $this->availability->get_available_hours($date, $service, $provider, $exclude_appointment_id);
$is_still_available = FALSE;
$appointment_hour = date('H:i', strtotime($appointment['start_datetime']));
foreach ($available_hours as $available_hour)
{
if ($appointment_hour === $available_hour)
{
$is_still_available = TRUE;
break;
}
}
return $is_still_available ? $appointment['id_users_provider'] : NULL;
}
/**
* Get Unavailable Dates
*
* Get an array with the available dates of a specific provider, service and month of the year. Provide the
* "provider_id", "service_id" and "selected_date" as GET parameters to the request. The "selected_date" parameter
* must have the Y-m-d format.
*
* Outputs a JSON string with the unavailable dates. that are unavailable.
*/
public function ajax_get_unavailable_dates()
{
try
{
$provider_id = request('provider_id');
$service_id = request('service_id');
$appointment_id = request('appointment_id');
$manage_mode = filter_var(request('manage_mode'), FILTER_VALIDATE_BOOLEAN);
$selected_date_string = request('selected_date');
$selected_date = new DateTime($selected_date_string);
$number_of_days_in_month = (int)$selected_date->format('t');
$unavailable_dates = [];
$provider_ids = $provider_id === ANY_PROVIDER
? $this->search_providers_by_service($service_id)
: [$provider_id];
$exclude_appointment_id = $manage_mode ? $appointment_id : NULL;
// Get the service record.
$service = $this->services_model->find($service_id);
for ($i = 1; $i <= $number_of_days_in_month; $i++)
{
$current_date = new DateTime($selected_date->format('Y-m') . '-' . $i);
if ($current_date < new DateTime(date('Y-m-d 00:00:00')))
{
// Past dates become immediately unavailable.
$unavailable_dates[] = $current_date->format('Y-m-d');
continue;
}
// Finding at least one slot of availability.
foreach ($provider_ids as $current_provider_id)
{
$provider = $this->providers_model->find($current_provider_id);
$available_hours = $this->availability->get_available_hours(
$current_date->format('Y-m-d'),
$service,
$provider,
$exclude_appointment_id
);
if ( ! empty($available_hours))
{
break;
}
}
// No availability amongst all the provider.
if (empty($available_hours))
{
$unavailable_dates[] = $current_date->format('Y-m-d');
}
}
json_response($unavailable_dates);
}
catch (Throwable $e)
{
json_exception($e);
}
}
/**
* Search for any provider that can handle the requested service.
*
* This method will return the database ID of the providers affected to the requested service.
*
* @param int $service_id The requested service ID.
*
* @return array Returns the ID of the provider that can provide the requested service.
*/
protected function search_providers_by_service(int $service_id): array
{
$available_providers = $this->providers_model->get_available_providers();
$provider_list = [];
foreach ($available_providers as $provider)
{
foreach ($provider['services'] as $provider_service_id)
{
if ($provider_service_id === $service_id)
{
// Check if the provider is affected to the selected service.
$provider_list[] = $provider['id'];
}
}
}
return $provider_list;
}
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}