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easyappointments/src/application/controllers/Appointments.php

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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/* ----------------------------------------------------------------------------
* Easy!Appointments - Open Source Web Scheduler
*
* @package EasyAppointments
* @author A.Tselegidis <alextselegidis@gmail.com>
* @copyright Copyright (c) 2013 - 2016, Alex Tselegidis
* @license http://opensource.org/licenses/GPL-3.0 - GPLv3
* @link http://easyappointments.org
* @since v1.0.0
* ---------------------------------------------------------------------------- */
/**
* Appointments Controller
*
* @package Controllers
*/
class Appointments extends CI_Controller {
/**
* Class Constructor
*/
public function __construct() {
parent::__construct();
$this->load->library('session');
$this->load->helper('installation');
// Set user's selected language.
if ($this->session->userdata('language')) {
$this->config->set_item('language', $this->session->userdata('language'));
$this->lang->load('translations', $this->session->userdata('language'));
} else {
$this->lang->load('translations', $this->config->item('language')); // default
}
// Common helpers
$this->load->helper('google_analytics');
}
/**
* 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 send with the book success email.
*
* @param string $appointment_hash The db appointment hash of an existing record.
*/
public function index($appointment_hash = '') {
if (!is_ea_installed()) {
redirect('installation/index');
return;
}
$this->load->model('appointments_model');
$this->load->model('providers_model');
$this->load->model('services_model');
$this->load->model('customers_model');
$this->load->model('settings_model');
try {
$available_services = $this->services_model->get_available_services();
$available_providers = $this->providers_model->get_available_providers();
$company_name = $this->settings_model->get_setting('company_name');
$date_format = $this->settings_model->get_setting('date_format');
// Remove the data that are not needed inside the $available_providers array.
foreach ($available_providers as $index=>$provider) {
$stripped_data = array(
'id' => $provider['id'],
'first_name' => $provider['first_name'],
'last_name' => $provider['last_name'],
'services' => $provider['services']
);
$available_providers[$index] = $stripped_data;
}
// If an appointment hash is provided then it means that the customer
// is trying to edit a registered appointment record.
if ($appointment_hash !== '') {
// Load the appointments data and enable the manage mode of the page.
$manage_mode = TRUE;
$results = $this->appointments_model->get_batch(array('hash' => $appointment_hash));
if (count($results) === 0) {
// The requested appointment doesn't exist in the database. Display
// a message to the customer.
$view = array(
'message_title' => $this->lang->line('appointment_not_found'),
'message_text' => $this->lang->line('appointment_does_not_exist_in_db'),
'message_icon' => base_url('assets/img/error.png')
);
$this->load->view('appointments/message', $view);
return;
}
$appointment = $results[0];
$provider = $this->providers_model->get_row($appointment['id_users_provider']);
$customer = $this->customers_model->get_row($appointment['id_users_customer']);
} 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;
$appointment = array();
$provider = array();
$customer = array();
}
// Load the book appointment view.
$view = array (
'available_services' => $available_services,
'available_providers' => $available_providers,
'company_name' => $company_name,
'manage_mode' => $manage_mode,
'date_format' => $date_format,
'appointment_data' => $appointment,
'provider_data' => $provider,
'customer_data' => $customer
);
} catch(Exception $exc) {
$view['exceptions'][] = $exc;
}
$this->load->view('appointments/book', $view);
}
/**
* 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.
*
* @param string $appointment_hash This is used to distinguish the
* appointment record.
* @param string $_POST['cancel_reason'] The text that describes why
* the customer cancelled the appointment.
*/
public function cancel($appointment_hash) {
try {
$this->load->model('appointments_model');
$this->load->model('providers_model');
$this->load->model('customers_model');
$this->load->model('services_model');
$this->load->model('settings_model');
// Check whether the appointment hash exists in the database.
$records = $this->appointments_model->get_batch(array('hash' => $appointment_hash));
if (count($records) == 0) {
throw new Exception('No record matches the provided hash.');
}
$appointment = $records[0];
$provider = $this->providers_model->get_row($appointment['id_users_provider']);
$customer = $this->customers_model->get_row($appointment['id_users_customer']);
$service = $this->services_model->get_row($appointment['id_services']);
$company_settings = array(
'company_name' => $this->settings_model->get_setting('company_name'),
'company_email' => $this->settings_model->get_setting('company_email'),
'company_link' => $this->settings_model->get_setting('company_link')
);
// :: DELETE APPOINTMENT RECORD FROM THE DATABASE.
if (!$this->appointments_model->delete($appointment['id'])) {
throw new Exception('Appointment could not be deleted from the database.');
}
// :: SYNC APPOINTMENT REMOVAL WITH GOOGLE CALENDAR
if ($appointment['id_google_calendar'] != NULL) {
try {
$google_sync = filter_var($this->providers_model
->get_setting('google_sync',$appointment['id_users_provider']), FILTER_VALIDATE_BOOLEAN);
if ($google_sync == TRUE) {
$google_token = json_decode($this->providers_model
->get_setting('google_token', $provider['id']));
$this->load->library('Google_Sync');
$this->google_sync->refresh_token($google_token->refresh_token);
$this->google_sync->delete_appointment($provider, $appointment['id_google_calendar']);
}
} catch(Exception $exc) {
$exceptions[] = $exc;
}
}
// :: SEND NOTIFICATION EMAILS TO CUSTOMER AND PROVIDER
try {
$this->load->library('Notifications');
$send_provider = filter_var($this->providers_model
->get_setting('notifications', $provider['id']), FILTER_VALIDATE_BOOLEAN);
if ($send_provider == TRUE) {
$this->notifications->send_delete_appointment($appointment, $provider,
$service, $customer, $company_settings, $provider['email'],
$_POST['cancel_reason']);
}
$send_customer = filter_var($this->settings_model->get_setting('customer_notifications'),
FILTER_VALIDATE_BOOLEAN);
if ($send_customer === TRUE) {
$this->notifications->send_delete_appointment($appointment, $provider,
$service, $customer, $company_settings, $customer['email'],
$_POST['cancel_reason']);
}
} catch(Exception $exc) {
$exceptions[] = $exc;
}
} catch(Exception $exc) {
// Display the error message to the customer.
$exceptions[] = $exc;
}
$view = array(
'message_title' => $this->lang->line('appointment_cancelled_title'),
'message_text' => $this->lang->line('appointment_cancelled'),
'message_icon' => base_url('assets/img/success.png')
);
if (isset($exceptions)) {
$view['exceptions'] = $exceptions;
}
$this->load->view('appointments/message', $view);
}
/**
* GET an specific appointment book and redirect to the success screen.
*
* @param int $appointment_id Contains the id of the appointment to retrieve.
*/
public function book_success($appointment_id) {
//if the appointment id doesn't exist or zero redirect to index
if(!$appointment_id){
redirect('appointments');
}
$this->load->model('appointments_model');
$this->load->model('providers_model');
$this->load->model('services_model');
$this->load->model('settings_model');
//retrieve the data needed in the view
$appointment = $this->appointments_model->get_row($appointment_id);
$provider = $this->providers_model->get_row($appointment['id_users_provider']);
$service = $this->services_model->get_row($appointment['id_services']);
$company_name = $this->settings_model->get_setting('company_name');
//get the exceptions
$exceptions = $this->session->flashdata('book_success');
// :: LOAD THE BOOK SUCCESS VIEW
$view = array(
'appointment_data' => $appointment,
'provider_data' => $provider,
'service_data' => $service,
'company_name' => $company_name,
);
if($exceptions){
$view['exceptions'] = $exceptions;
}
$this->load->view('appointments/book_success', $view);
}
/**
* [AJAX] Get the available appointment hours for the given date.
*
* This method answers to an AJAX request. It calculates the available hours
* for thegiven service, provider and date.
*
* @param numeric $_POST['service_id'] The selected service's record id.
* @param numeric|string $_POST['provider_id'] The selected provider's record id, can also be 'any-provider'.
* @param string $_POST['selected_date'] The selected date of which the available hours we want to see.
* @param numeric $_POST['service_duration'] The selected service duration in minutes.
* @param string $_POST['manage_mode'] Contains either 'true' or 'false' and determines the if current user
* is managing an already booked appointment or not.
*
* @return Returns a json object with the available hours.
*/
public function ajax_get_available_hours() {
$this->load->model('providers_model');
$this->load->model('appointments_model');
$this->load->model('settings_model');
try {
// Do not continue if there was no provider selected (more likely there is no provider in the system).
if (empty($_POST['provider_id'])) {
echo json_encode(array());
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.
$exclude_appointments = ($_POST['manage_mode'] === 'true')
? array($_POST['appointment_id'])
: array();
// If the user has selected the "any-provider" option then we will need to search
// for an available provider that will provide the requested service.
if ($_POST['provider_id'] === ANY_PROVIDER) {
$_POST['provider_id'] = $this->_search_any_provider($_POST['service_id'], $_POST['selected_date']);
if ($_POST['provider_id'] === NULL) {
echo json_encode(array());
return;
}
}
$empty_periods = $this->_get_provider_available_time_periods($_POST['provider_id'],
$_POST['selected_date'], $exclude_appointments);
$available_hours = $this->_calculate_available_hours($empty_periods, $_POST['selected_date'],
$_POST['service_duration'], filter_var($_POST['manage_mode'], FILTER_VALIDATE_BOOLEAN));
echo json_encode($available_hours);
} catch(Exception $exc) {
echo json_encode(array(
'exceptions' => array(exceptionToJavaScript($exc))
));
}
}
/**
* [AJAX] Register the appointment to the database.
*
* @return string Returns a JSON string with the appointment database ID.
*/
public function ajax_register_appointment() {
try {
$post_data = $_POST['post_data']; // alias
$post_data['manage_mode'] = filter_var($post_data['manage_mode'], FILTER_VALIDATE_BOOLEAN);
$this->load->model('appointments_model');
$this->load->model('providers_model');
$this->load->model('services_model');
$this->load->model('customers_model');
$this->load->model('settings_model');
// Validate the CAPTCHA string.
if ($this->settings_model->get_setting('require_captcha') === '1'
&& $this->session->userdata('captcha_phrase') !== $_POST['captcha']) {
echo json_encode(array(
'captcha_verification' => FALSE,
'expected_phrase' => $this->session->userdata('captcha_phrase')
));
return;
}
// Check appointment availability.
if (!$this->_check_datetime_availability()) {
throw new Exception($this->lang->line('requested_hour_is_unavailable'));
}
$appointment = $_POST['post_data']['appointment'];
$customer = $_POST['post_data']['customer'];
if ($this->customers_model->exists($customer)) {
$customer['id'] = $this->customers_model->find_record_id($customer);
}
$customer_id = $this->customers_model->add($customer);
$appointment['id_users_customer'] = $customer_id;
$appointment['is_unavailable'] = (int)$appointment['is_unavailable']; // needs to be type casted
$appointment['id'] = $this->appointments_model->add($appointment);
$appointment['hash'] = $this->appointments_model->get_value('hash', $appointment['id']);
$provider = $this->providers_model->get_row($appointment['id_users_provider']);
$service = $this->services_model->get_row($appointment['id_services']);
$company_settings = array(
'company_name' => $this->settings_model->get_setting('company_name'),
'company_link' => $this->settings_model->get_setting('company_link'),
'company_email' => $this->settings_model->get_setting('company_email')
);
// :: SYNCHRONIZE APPOINTMENT WITH PROVIDER'S GOOGLE CALENDAR
// The provider must have previously granted access to his google calendar account
// in order to sync the appointment.
try {
$google_sync = filter_var($this->providers_model->get_setting('google_sync',
$appointment['id_users_provider']), FILTER_VALIDATE_BOOLEAN);
if ($google_sync == TRUE) {
$google_token = json_decode($this->providers_model
->get_setting('google_token', $appointment['id_users_provider']));
$this->load->library('google_sync');
$this->google_sync->refresh_token($google_token->refresh_token);
if ($post_data['manage_mode'] === FALSE) {
// Add appointment to Google Calendar.
$google_event = $this->google_sync->add_appointment($appointment, $provider,
$service, $customer, $company_settings);
$appointment['id_google_calendar'] = $google_event->id;
$this->appointments_model->add($appointment);
} else {
// Update appointment to Google Calendar.
$appointment['id_google_calendar'] = $this->appointments_model
->get_value('id_google_calendar', $appointment['id']);
$this->google_sync->update_appointment($appointment, $provider,
$service, $customer, $company_settings);
}
}
} catch(Exception $exc) {
log_message('error', $exc->getMessage());
log_message('error', $exc->getTraceAsString());
}
// :: SEND NOTIFICATION EMAILS TO BOTH CUSTOMER AND PROVIDER
try {
$this->load->library('Notifications');
if ($post_data['manage_mode'] == FALSE) {
$customer_title = $this->lang->line('appointment_booked');
$customer_message = $this->lang->line('thank_you_for_appointment');
$provider_title = $this->lang->line('appointment_added_to_your_plan');
$provider_message = $this->lang->line('appointment_link_description');
} else {
$customer_title = $this->lang->line('appointment_changes_saved');
$customer_message = '';
$provider_title = $this->lang->line('appointment_details_changed');
$provider_message = '';
}
$customer_link = site_url('appointments/index/' . $appointment['hash']);
$provider_link = site_url('backend/index/' . $appointment['hash']);
$send_customer = filter_var($this->settings_model->get_setting('customer_notifications'),
FILTER_VALIDATE_BOOLEAN);
if ($send_customer == TRUE) {
$this->notifications->send_appointment_details($appointment, $provider,
$service, $customer,$company_settings, $customer_title,
$customer_message, $customer_link, $customer['email']);
}
$send_provider = filter_var($this->providers_model ->get_setting('notifications', $provider['id']),
FILTER_VALIDATE_BOOLEAN);
if ($send_provider == TRUE) {
$this->notifications->send_appointment_details($appointment, $provider,
$service, $customer, $company_settings, $provider_title,
$provider_message, $provider_link, $provider['email']);
}
} catch(Exception $exc) {
log_message('error', $exc->getMessage());
log_message('error', $exc->getTraceAsString());
}
echo json_encode(array(
'appointment_id' => $appointment['id']
));
} catch(Exception $exc) {
echo json_encode(array(
'exceptions' => array(exceptionToJavaScript($exc))
));
}
}
/**
* [AJAX] 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.
*
* @return string Returns a JSON array with the dates that are unavailable.
*/
public function ajax_get_unavailable_dates() {
try {
$provider_id = $this->input->get('provider_id');
$service_id = $this->input->get('service_id');
$selected_date = new DateTime($this->input->get('selected_date'));
$number_of_days = (int)$selected_date->format('t');
$unavailable_dates = array();
// Handle the "Any Provider" case.
if ($provider_id === ANY_PROVIDER) {
$provider_id = $this->_search_any_provider($service_id, $this->input->get('selected_date'));
if ($provider_id === NULL) { // No provider is available in the selected date.
for ($i=1; $i<=$number_of_days; $i++) {
$current_date = new DateTime($selected_date->format('Y-m') . '-' . $i);
$unavailable_dates[] = $current_date->format('Y-m-d');
}
echo json_encode($unavailable_dates);
return;
}
}
// Get the available time periods for every day of this month.
$this->load->model('services_model');
$service_duration = (int)$this->services_model->get_value('duration', $service_id);
for ($i=1; $i<=$number_of_days; $i++) {
$current_date = new DateTime($selected_date->format('Y-m') . '-' . $i);
if ($current_date < new DateTime()) { // Past dates become immediatelly unavailable.
$unavailable_dates[] = $current_date->format('Y-m-d');
continue;
}
$empty_periods = $this->_get_provider_available_time_periods($provider_id,
$current_date->format('Y-m-d'));
$available_hours = $this->_calculate_available_hours($empty_periods, $current_date->format('Y-m-d'),
$service_duration);
if (empty($available_hours)) {
$unavailable_dates[] = $current_date->format('Y-m-d');
}
}
echo json_encode($unavailable_dates);
} catch(Exception $exc) {
echo json_encode(array(
'exceptions' => array(exceptionToJavaScript($exc))
));
}
}
/**
* Check whether the provider is still available in the selected appointment date.
*
* It might be times where two or more customers select the same appointment date and time.
* This shouldn't be allowed to happen, so one of the two customers will eventually get the
* prefered date and the other one will have to choose for another date. Use this method
* just before the customer confirms the appointment details. If the selected date was taken
* in the mean time, the customer must be prompted to select another time for his appointment.
*
* @return bool Returns whether the selected datetime is still available.
*/
protected function _check_datetime_availability() {
$this->load->model('services_model');
$appointment = $_POST['post_data']['appointment'];
$service_duration = $this->services_model->get_value('duration', $appointment['id_services']);
$exclude_appointments = (isset($appointment['id'])) ? array($appointment['id']) : array();
if ($appointment['id_users_provider'] === ANY_PROVIDER) {
$appointment['id_users_provider'] = $this->_search_any_provider($appointment['id_services'],
date('Y-m-d', strtotime($appointment['start_datetime'])));
$_POST['post_data']['appointment']['id_users_provider'] = $appointment['id_users_provider'];
return TRUE; // The selected provider is always available.
}
$available_periods = $this->_get_provider_available_time_periods(
$appointment['id_users_provider'], date('Y-m-d', strtotime($appointment['start_datetime'])),
$exclude_appointments);
$is_still_available = FALSE;
foreach($available_periods as $period) {
$appt_start = new DateTime($appointment['start_datetime']);
$appt_start = $appt_start->format('H:i');
$appt_end = new DateTime($appointment['start_datetime']);
$appt_end->add(new DateInterval('PT' . $service_duration . 'M'));
$appt_end = $appt_end->format('H:i');
$period_start = date('H:i', strtotime($period['start']));
$period_end = date('H:i', strtotime($period['end']));
if ($period_start <= $appt_start && $period_end >= $appt_end) {
$is_still_available = TRUE;
break;
}
}
return $is_still_available;
}
/**
* Get an array containing the free time periods (start - end) of a selected date.
*
* This method is very important because there are many cases where the system needs to
* know when a provider is avaible for an appointment. This method will return an array
* that belongs to the selected date and contains values that have the start and the end
* time of an available time period.
*
* @param numeric $provider_id The provider's record id.
* @param string $selected_date The date to be checked (MySQL formatted string).
* @param array $exclude_appointments This array contains the ids of the appointments that
* will not be taken into consideration when the available time periods are calculated.
*
* @return array Returns an array with the available time periods of the provider.
*/
protected function _get_provider_available_time_periods($provider_id, $selected_date,
$exclude_appointments = array()) {
$this->load->model('appointments_model');
$this->load->model('providers_model');
// Get the provider's working plan and reserved appointments.
$working_plan = json_decode($this->providers_model->get_setting('working_plan', $provider_id), TRUE);
$where_clause = array(
'id_users_provider' => $provider_id
);
$reserved_appointments = $this->appointments_model->get_batch($where_clause);
// Sometimes it might be necessary to not take into account some appointment records
// in order to display what the providers' available time periods would be without them.
foreach ($exclude_appointments as $excluded_id) {
foreach ($reserved_appointments as $index => $reserved) {
if ($reserved['id'] == $excluded_id) {
unset($reserved_appointments[$index]);
}
}
}
// Find the empty spaces on the plan. The first split between the plan is due to
// a break (if exist). After that every reserved appointment is considered to be
// a taken space in the plan.
$selected_date_working_plan = $working_plan[strtolower(date('l', strtotime($selected_date)))];
$available_periods_with_breaks = array();
if (isset($selected_date_working_plan['breaks'])) {
$start = new DateTime($selected_date_working_plan['start']);
$end = new DateTime($selected_date_working_plan['end']);
$available_periods_with_breaks[] = array(
'start' => $selected_date_working_plan['start'],
'end' => $selected_date_working_plan['end']
);
// Split the working plan to available time periods that do not contain the breaks in them.
foreach ($selected_date_working_plan['breaks'] as $index => $break) {
$break_start = new DateTime($break['start']);
$break_end = new DateTime($break['end']);
if ($break_start < $start) {
$break_start = $start;
}
if ($break_end > $end) {
$break_end = $end;
}
if ($break_start >= $break_end) {
continue;
}
foreach ($available_periods_with_breaks as $key => $open_period) {
$s = new DateTime($open_period['start']);
$e = new DateTime($open_period['end']);
if ($s < $break_end && $break_start < $e) { // check for overlap
$changed = FALSE;
if ($s < $break_start) {
$open_start = $s;
$open_end = $break_start;
$available_periods_with_breaks[] = array(
'start' => $open_start->format("H:i"),
'end' => $open_end->format("H:i")
);
$changed = TRUE;
}
if ($break_end < $e) {
$open_start = $break_end;
$open_end = $e;
$available_periods_with_breaks[] = array(
'start' => $open_start->format("H:i"),
'end' => $open_end->format("H:i")
);
$changed = TRUE;
}
if ($changed) {
unset($available_periods_with_breaks[$key]);
}
}
}
}
}
// Break the empty periods with the reserved appointments.
$available_periods_with_appointments = $available_periods_with_breaks;
foreach($reserved_appointments as $appointment) {
foreach($available_periods_with_appointments as $index => &$period) {
$a_start = strtotime($appointment['start_datetime']);
$a_end = strtotime($appointment['end_datetime']);
$p_start = strtotime($selected_date . ' ' . $period['start']);
$p_end = strtotime($selected_date . ' ' .$period['end']);
if ($a_start <= $p_start && $a_end <= $p_end && $a_end <= $p_start) {
// The appointment does not belong in this time period, so we
// will not change anything.
} else if ($a_start <= $p_start && $a_end <= $p_end && $a_end >= $p_start) {
// The appointment starts before the period and finishes somewhere inside.
// We will need to break this period and leave the available part.
$period['start'] = date('H:i', $a_end);
} else if ($a_start >= $p_start && $a_end <= $p_end) {
// The appointment is inside the time period, so we will split the period
// into two new others.
unset($available_periods_with_appointments[$index]);
$available_periods_with_appointments[] = array(
'start' => date('H:i', $p_start),
'end' => date('H:i', $a_start)
);
$available_periods_with_appointments[] = array(
'start' => date('H:i', $a_end),
'end' => date('H:i', $p_end)
);
} else if ($a_start >= $p_start && $a_end >= $p_start && $a_start <= $p_end) {
// The appointment starts in the period and finishes out of it. We will
// need to remove the time that is taken from the appointment.
$period['end'] = date('H:i', $a_start);
} else if ($a_start >= $p_start && $a_end >= $p_end && $a_start >= $p_end) {
// The appointment does not belong in the period so do not change anything.
} else if ($a_start <= $p_start && $a_end >= $p_end && $a_start <= $p_end) {
// The appointment is bigger than the period, so this period needs to be removed.
unset($available_periods_with_appointments[$index]);
}
}
}
return array_values($available_periods_with_appointments);
}
/**
* 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 numeric $service_id The requested service ID.
* @param string $selected_date The date to be searched.
*
* @return int Returns the ID of the provider that can provide the service at the selected date.
*/
protected function _search_any_provider($service_id, $selected_date) {
$this->load->model('providers_model');
$this->load->model('services_model');
$available_providers = $this->providers_model->get_available_providers();
$service = $this->services_model->get_row($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.
$empty_periods = $this->_get_provider_available_time_periods($provider['id'], $selected_date);
$available_hours = $this->_calculate_available_hours($empty_periods, $selected_date, $service['duration']);
if (count($available_hours) > $max_hours_count) {
$provider_id = $provider['id'];
$max_hours_count = count($available_hours);
}
}
}
}
return $provider_id;
}
/**
* Calculate the avaialble appointment hours.
*
* Calculate the available appointment hours for the given date. The empty spaces
* are broken down to 15 min and if the service fit in each quarter then a new
* available hour is added to the "$available_hours" array.
*
* @param array $empty_periods Contains the empty periods as generated by the
* "_get_provider_available_time_periods" method.
* @param string $selected_date The selected date to be search (format )
* @param numeric $service_duration The service duration is required for the hour calculation.
* @param bool $manage_mode (optional) Whether we are currently on manage mode (editing an existing appointment).
*
* @return array Returns an array with the available hours for the appointment.
*/
protected function _calculate_available_hours(array $empty_periods, $selected_date, $service_duration,
$manage_mode = FALSE) {
$this->load->model('settings_model');
$available_hours = array();
foreach ($empty_periods as $period) {
$start_hour = new DateTime($selected_date . ' ' . $period['start']);
$end_hour = new DateTime($selected_date . ' ' . $period['end']);
$minutes = $start_hour->format('i');
if ($minutes % 15 != 0) {
// Change the start hour of the current space in order to be
// on of the following: 00, 15, 30, 45.
if ($minutes < 15) {
$start_hour->setTime($start_hour->format('H'), 15);
} else if ($minutes < 30) {
$start_hour->setTime($start_hour->format('H'), 30);
} else if ($minutes < 45) {
$start_hour->setTime($start_hour->format('H'), 45);
} else {
$start_hour->setTime($start_hour->format('H') + 1, 00);
}
}
$current_hour = $start_hour;
$diff = $current_hour->diff($end_hour);
while (($diff->h * 60 + $diff->i) >= intval($service_duration)) {
$available_hours[] = $current_hour->format('H:i');
$current_hour->add(new DateInterval("PT15M"));
$diff = $current_hour->diff($end_hour);
}
}
// If the selected date is today, remove past hours. It is important include the timeout before
// booking that is set in the backoffice the system. Normally we might want the customer to book
// an appointment that is at least half or one hour from now. The setting is stored in minutes.
if (date('m/d/Y', strtotime($selected_date)) === date('m/d/Y')) {
$book_advance_timeout = $this->settings_model->get_setting('book_advance_timeout');
foreach($available_hours as $index => $value) {
$available_hour = strtotime($value);
$current_hour = strtotime('+' . $book_advance_timeout . ' minutes', strtotime('now'));
if ($available_hour <= $current_hour) {
unset($available_hours[$index]);
}
}
}
$available_hours = array_values($available_hours);
sort($available_hours, SORT_STRING );
$available_hours = array_values($available_hours);
return $available_hours;
}
}
/* End of file appointments.php */
/* Location: ./application/controllers/appointments.php */
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