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easyappointments/src/application/controllers/appointments.php

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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Appointments extends CI_Controller {
public function __construct() {
parent::__construct();
$this->load->library('session');
// Set user's selected language.
if ($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
}
}
/**
* 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 (!$this->check_installation()) return;
$this->load->model('appointments_model');
$this->load->model('providers_model');
$this->load->model('services_model');
$this->load->model('customers_model');
$this->load->model('settings_model');
if (strtoupper($_SERVER['REQUEST_METHOD']) !== 'POST') {
try {
$available_services = $this->services_model->get_available_services();
$available_providers = $this->providers_model->get_available_providers();
$company_name = $this->settings_model->get_setting('company_name');
// If an appointment hash is provided then it means that the customer
// is trying to edit a registered appointment record.
if ($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' => $this->config->item('base_url')
. 'assets/images/error.png',
'company_name' => $company_name
);
$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,
'appointment_data' => $appointment,
'provider_data' => $provider,
'customer_data' => $customer
);
} catch(Exception $exc) {
$view['exceptions'][] = $exc;
}
$this->load->view('appointments/book', $view);
} else {
// The page is a post-back. Register the appointment and send notification emails
// to the provider and the customer that are related to the appointment. If google
// sync is enabled then add the appointment to the provider's account.
try {
$post_data = json_decode($_POST['post_data'], true);
$appointment = $post_data['appointment'];
$customer = $post_data['customer'];
if ($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['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 = $this->providers_model->get_setting('google_sync',
$appointment['id_users_provider']);
if ($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) {
$view['exceptions'][] = $exc;
}
// :: SEND NOTIFICATION EMAILS TO BOTH CUSTOMER AND PROVIDER
try {
$this->load->library('Notifications');
$send_provider = $this->providers_model
->get_setting('notifications', $provider['id']);
if (!$post_data['manage_mode']) {
$customer_title = $this->lang->line('appointment_booked');
$customer_message = $this->lang->line('thank_your_for_appointment');
$customer_link = $this->config->item('base_url') . 'appointments/index/'
. $appointment['hash'];
$provider_title = $this->lang->line('appointment_added_to_your_plan');
$provider_message = $this->lang->line('appointment_link_description');
$provider_link = $this->config->item('base_url') . 'backend/index/'
. $appointment['hash'];
} else {
$customer_title = $this->lang->line('appointment_changes_saved');
$customer_message = '';
$customer_link = $this->config->item('base_url') . 'appointments/index/'
. $appointment['hash'];
$provider_title = $this->lang->line('appointment_details_changed');
$provider_message = '';
$provider_link = $this->config->item('base_url') . 'backend/index/'
. $appointment['hash'];
}
$this->notifications->send_appointment_details($appointment, $provider,
$service, $customer,$company_settings, $customer_title,
$customer_message, $customer_link, $customer['email']);
if ($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) {
$view['exceptions'][] = $exc;
}
// :: LOAD THE BOOK SUCCESS VIEW
$view = array(
'appointment_data' => $appointment,
'provider_data' => $provider,
'service_data' => $service,
'company_name' => $company_settings['company_name']
);
} catch(Exception $exc) {
$view['exceptions'][] = $exc;
}
$this->load->view('appointments/book_success', $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 = $this->providers_model->get_setting('google_sync',
$appointment['id_users_provider']);
if ($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 = $this->providers_model
->get_setting('notifications', $provider['id']);
if ($send_provider == TRUE) {
$this->notifications->send_delete_appointment($appointment, $provider,
$service, $customer, $company_settings, $provider['email'],
$_POST['cancel_reason']);
}
$this->notifications->send_delete_appointment($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;
}
$view = array();
if (isset($exceptions)) {
$view['exceptions'] = $exceptions;
}
$this->load->view('appointments/cancel', $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 $_POST['provider_id'] The selected provider's record id.
* @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 {
// 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();
$empty_periods = $this->get_provider_available_time_periods($_POST['provider_id'],
$_POST['selected_date'], $exclude_appointments);
// Calculate the available appointment hours for the given date. The empty spaces
// are broken down to 15 min and if the service fit in each quarter then a new
// available hour is added to the "$available_hours" array.
$available_hours = array();
foreach ($empty_periods as $period) {
$start_hour = new DateTime($_POST['selected_date'] . ' ' . $period['start']);
$end_hour = new DateTime($_POST['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 + $diff->i) >= intval($_POST['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($_POST['selected_date'])) == date('m/d/Y')) {
if ($_POST['manage_mode'] === 'true') {
$book_advance_timeout = 0;
} else {
$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);
echo json_encode($available_hours);
} 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.
*
* @param int $_POST['id_users_provider'] The selected provider's record id.
* @param int $_POST['id_services'] The selected service's record id.
* @param string $_POST['start_datetime'] This is a mysql formed string.
* @return bool Returns whether the selected datetime is still available.
*/
public function ajax_check_datetime_availability() {
try {
$this->load->model('services_model');
$service_duration = $this->services_model->get_value('duration', $_POST['id_services']);
$exclude_appointments = (isset($_POST['exclude_appointment_id']))
? array($_POST['exclude_appointment_id']) : array();
$available_periods = $this->get_provider_available_time_periods(
$_POST['id_users_provider'], $_POST['start_datetime'], $exclude_appointments);
$is_still_available = FALSE;
foreach($available_periods as $period) {
$appt_start = new DateTime($_POST['start_datetime']);
$appt_start = $appt_start->format('H:i');
$appt_end = new DateTime($_POST['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) {
$is_still_available = TRUE;
break;
}
}
echo json_encode($is_still_available);
} catch(Exception $exc) {
echo json_encode(array(
'exceptions' => array(exceptionToJavaScript($exc))
));
}
}
/**
* 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 $exclude_appointments This array contains the ids of the appointments that
* will not be taken into consideration when the available time periods are calculated.
* @return array Returns an array with the available time periods of the provider.
*/
private function get_provider_available_time_periods($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);
$where_clause = array(
'DATE(start_datetime)' => date('Y-m-d', strtotime($selected_date)),
'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'])) {
if (count($selected_date_working_plan['breaks'])) {
foreach($selected_date_working_plan['breaks'] as $index=>$break) {
// Split the working plan to available time periods that do not
// contain the breaks in them.
$last_break_index = $index - 1;
if (count($available_periods_with_breaks) === 0) {
$start_hour = $selected_date_working_plan['start'];
$end_hour = $break['start'];
} else {
$start_hour = $selected_date_working_plan['breaks'][$last_break_index]['end'];
$end_hour = $break['start'];
}
$available_periods_with_breaks[] = array(
'start' => $start_hour,
'end' => $end_hour
);
}
// Add the period from the last break to the end of the day.
$available_periods_with_breaks[] = array(
'start' => $selected_date_working_plan['breaks'][$index]['end'],
'end' => $selected_date_working_plan['end']
);
} else {
$available_periods_with_breaks[] = array(
'start' => $selected_date_working_plan['start'],
'end' => $selected_date_working_plan['end']
);
}
}
// 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) {
$a_start = date('H:i', strtotime($appointment['start_datetime']));
$a_end = date('H:i', strtotime($appointment['end_datetime']));
$p_start = date('H:i', strtotime($period['start']));
$p_end = date('H:i', strtotime($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'] = $a_end;
} else if ($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' => $p_start,
'end' => $a_start
);
$available_periods_with_appointments[] = array(
'start' => $a_end,
'end' => $p_end
);
} else if ($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'] = $a_start;
} else if ($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);
}
/**
* This method checks whether the application is installed.
*
* This method resides in this controller because the "index()" function will
* be the first to be launched after the files are on the server. NOTE that the
* "configuration.php" file must be already set because we won't be able to
* connect to the database otherwise.
*/
public function check_installation() {
try {
if (!$this->db->table_exists('ea_users')) {
// This is the first time the website is launched an the user needs to set
// the basic settings. Display the installation view page.
$view['base_url'] = $this->config->item('base_url');
$this->load->view('general/installation', $view);
return FALSE; // Do not display the book appointment view file.
} else {
return TRUE; // Application installed, continue ...
}
} catch(Exception $exc) {
echo $exc->getTrace();
}
}
/**
* Installs Easy!Appointments on server.
*
* @param array $_POST['admin'] Contains the initial admin user data. System needs at least
* one admin user to work.
* @param array $_POST['company'] Contains the basic company data.
*/
public function ajax_install() {
try {
// 2nd method using the ci database class.
$file_contents = file_get_contents($this->config->item('base_url') . 'assets/sql/structure.sql');
$sql_queries = explode(';', $file_contents);
array_pop($sql_queries);
foreach($sql_queries as $query) {
$this->db->query($query);
}
// Insert admin
$this->load->model('admins_model');
$admin = json_decode($_POST['admin'], true);
$admin['settings']['username'] = $admin['username'];
$admin['settings']['password'] = $admin['password'];
unset($admin['username'], $admin['password']);
$this->admins_model->add($admin);
// Save company settings
$this->load->model('settings_model');
$company = json_decode($_POST['company'], true);
$this->settings_model->set_setting('company_name', $company['company_name']);
$this->settings_model->set_setting('company_email', $company['company_email']);
$this->settings_model->set_setting('company_link', $company['company_link']);
// Try to send a notification email for the new installation.
// IMPORTANT: THIS WILL ONLY BE USED TO TRACK THE INSTALLATION NUMBER AND
// NO PERSONAL DATA WILL BE USED FOR OTHER CAUSE.
try {
$this->load->library('notifications');
$this->notifications->send_new_installation($company['company_name'],
$company['company_email'], $company['company_link']);
} catch(Exception $exc) {
// Well, I guess we'll never know ...
}
echo json_encode(AJAX_SUCCESS);
} catch (Exception $exc) {
echo json_encode(array(
'exceptions' => array(exceptionToJavaScript($exc))
));
}
}
}
/* End of file appointments.php */
/* Location: ./application/controllers/appointments.php */
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