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Added availabilities controller to API.

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Alex Tselegidis 2016-07-19 09:52:20 +02:00
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15
doc/rest-api.md
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@ -91,6 +91,21 @@ You can also try the GET requests with your browser by navigating to the respeci
## Resources & URIs
### Availabilities
**Resource JSON**
```
[
"09:30",
"13:00",
"13:15",
"14:00"
]
```
- `GET /api/v1/availabilities?providerId=:id&serviceId=:id[&date=:date]` Get the available appointment hours for a specific provider, service and date. The date must be in the following format `Y-m-d` e.g. `2016-07-19`.
### Appointments
**Resource JSON**

2
src/application/config/routes.php
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@ -76,5 +76,7 @@ $route['api/v1/settings/(:any)']['get'] = 'api/v1/settings/get/$1';
$route['api/v1/settings/(:any)']['put'] = 'api/v1/settings/put/$1';
$route['api/v1/settings/(:any)']['delete'] = 'api/v1/settings/delete/$1';
$route['api/v1/availabilities']['get'] = 'api/v1/availabilities/get';
/* End of file routes.php */
/* Location: ./application/config/routes.php */

384
src/application/controllers/api/v1/Availabilities.php Normal file
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@ -0,0 +1,384 @@
<?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 v1.2.0
* ---------------------------------------------------------------------------- */
require_once __DIR__ . '/API_V1_Controller.php';
require_once __DIR__ . '/../../Appointments.php';
use \EA\Engine\Api\V1\Response;
use \EA\Engine\Api\V1\Request;
use \EA\Engine\Types\UnsignedInt;
/**
* Availabilities Controller
*
* @package Controllers
* @subpackage API
*/
class Availabilities extends API_V1_Controller {
/**
* Class Constructor
*/
public function __construct() {
parent::__construct();
$this->load->model('appointments_model');
$this->load->model('providers_model');
$this->load->model('services_model');
$this->load->model('settings_model');
}
/**
* GET API Method
*
* Provide the "providerId", "serviceId" and "date" GET parameters to get the availabilities for a specific date.
* If no "date" was provided then the current date will be used.
*/
public function get() {
try {
$providerId = new UnsignedInt($this->input->get('providerId'));
$serviceId = new UnsignedInt($this->input->get('serviceId'));
if ($this->input->get('date')) {
$date = new DateTime($this->input->get('date'));
} else {
$date = new DateTime();
}
$service = $this->services_model->get_row($serviceId->get());
$emptyPeriods = $this->_get_provider_available_time_periods($providerId->get(),
$date->format('Y-m-d'), []);
$availableHours = $this->_calculate_available_hours($emptyPeriods,
$date->format('Y-m-d'), $service['duration'], false);
$this->output
->set_content_type('application/json')
->set_output(json_encode($availableHours));
} catch(\Exception $exception) {
exit($this->_handleException($exception));
}
}
/**
* 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/api/v1/Appointments.php */