mirror of
https://github.com/alextselegidis/easyappointments.git
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315 lines
14 KiB
PHP
315 lines
14 KiB
PHP
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/* ----------------------------------------------------------------------------
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* Easy!Appointments - Open Source Web Scheduler
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*
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* @package EasyAppointments
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* @author A.Tselegidis <alextselegidis@gmail.com>
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* @copyright Copyright (c) 2013 - 2017, Alex Tselegidis
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* @license http://opensource.org/licenses/GPL-3.0 - GPLv3
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* @link http://easyappointments.org
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* @since v1.2.0
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* ---------------------------------------------------------------------------- */
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require_once __DIR__ . '/API_V1_Controller.php';
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require_once __DIR__ . '/../../Appointments.php';
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use \EA\Engine\Types\UnsignedInteger;
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/**
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* Availabilities Controller
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*
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* @package Controllers
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* @subpackage API
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*/
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class Availabilities extends API_V1_Controller {
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/**
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* Class Constructor
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*/
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public function __construct() {
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parent::__construct();
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$this->load->model('appointments_model');
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$this->load->model('providers_model');
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$this->load->model('services_model');
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$this->load->model('settings_model');
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}
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/**
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* GET API Method
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*
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* Provide the "providerId", "serviceId" and "date" GET parameters to get the availabilities for a specific date.
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* If no "date" was provided then the current date will be used.
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*/
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public function get() {
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try {
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$providerId = new UnsignedInteger($this->input->get('providerId'));
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$serviceId = new UnsignedInteger($this->input->get('serviceId'));
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if ($this->input->get('date')) {
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$date = new DateTime($this->input->get('date'));
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} else {
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$date = new DateTime();
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}
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$service = $this->services_model->get_row($serviceId->get());
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$emptyPeriods = $this->_getProviderAvailableTimePeriods($providerId->get(),
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$date->format('Y-m-d'), []);
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$availableHours = $this->_calculateAvailableHours($emptyPeriods,
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$date->format('Y-m-d'), $service['duration'], false, $service['availabilities_type']);
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if ($service['attendants_number'] > 1) {
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$this->_getMultipleAttendantsHours($availableHours, $service['attendants_number'], $service['id'],
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$date->format('Y-m-d'));
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}
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$this->output
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->set_content_type('application/json')
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->set_output(json_encode($availableHours));
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} catch(\Exception $exception) {
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exit($this->_handleException($exception));
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}
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}
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/**
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* Get an array containing the free time periods (start - end) of a selected date.
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*
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* This method is very important because there are many cases where the system needs to
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* know when a provider is available for an appointment. This method will return an array
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* that belongs to the selected date and contains values that have the start and the end
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* time of an available time period.
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*
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* @param int $provider_id The provider's record id.
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* @param string $selected_date The date to be checked (MySQL formatted string).
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* @param array $exclude_appointments This array contains the ids of the appointments that
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* will not be taken into consideration when the available time periods are calculated.
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*
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* @return array Returns an array with the available time periods of the provider.
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*/
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protected function _getProviderAvailableTimePeriods($provider_id, $selected_date,
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$exclude_appointments = array()) {
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$this->load->model('appointments_model');
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$this->load->model('providers_model');
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// Get the provider's working plan and reserved appointments.
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$working_plan = json_decode($this->providers_model->get_setting('working_plan', $provider_id), TRUE);
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$where_clause = array(
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'id_users_provider' => $provider_id
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);
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$reserved_appointments = $this->appointments_model->get_batch($where_clause);
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// Sometimes it might be necessary to not take into account some appointment records
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// in order to display what the providers' available time periods would be without them.
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foreach ($exclude_appointments as $excluded_id) {
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foreach ($reserved_appointments as $index => $reserved) {
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if ($reserved['id'] == $excluded_id) {
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unset($reserved_appointments[$index]);
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}
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}
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}
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// Find the empty spaces on the plan. The first split between the plan is due to
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// a break (if exist). After that every reserved appointment is considered to be
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// a taken space in the plan.
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$selected_date_working_plan = $working_plan[strtolower(date('l', strtotime($selected_date)))];
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$available_periods_with_breaks = array();
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if (isset($selected_date_working_plan['breaks'])) {
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$start = new DateTime($selected_date_working_plan['start']);
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$end = new DateTime($selected_date_working_plan['end']);
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$available_periods_with_breaks[] = array(
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'start' => $selected_date_working_plan['start'],
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'end' => $selected_date_working_plan['end']
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);
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// Split the working plan to available time periods that do not contain the breaks in them.
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foreach ($selected_date_working_plan['breaks'] as $index => $break) {
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$break_start = new DateTime($break['start']);
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$break_end = new DateTime($break['end']);
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if ($break_start < $start) {
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$break_start = $start;
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}
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if ($break_end > $end) {
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$break_end = $end;
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}
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if ($break_start >= $break_end) {
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continue;
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}
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foreach ($available_periods_with_breaks as $key => $open_period) {
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$s = new DateTime($open_period['start']);
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$e = new DateTime($open_period['end']);
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if ($s < $break_end && $break_start < $e) { // check for overlap
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$changed = FALSE;
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if ($s < $break_start) {
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$open_start = $s;
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$open_end = $break_start;
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$available_periods_with_breaks[] = array(
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'start' => $open_start->format("H:i"),
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'end' => $open_end->format("H:i")
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);
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$changed = TRUE;
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}
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if ($break_end < $e) {
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$open_start = $break_end;
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$open_end = $e;
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$available_periods_with_breaks[] = array(
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'start' => $open_start->format("H:i"),
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'end' => $open_end->format("H:i")
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);
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$changed = TRUE;
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}
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if ($changed) {
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unset($available_periods_with_breaks[$key]);
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}
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}
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}
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}
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}
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// Break the empty periods with the reserved appointments.
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$available_periods_with_appointments = $available_periods_with_breaks;
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foreach($reserved_appointments as $appointment) {
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foreach($available_periods_with_appointments as $index => &$period) {
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$a_start = strtotime($appointment['start_datetime']);
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$a_end = strtotime($appointment['end_datetime']);
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$p_start = strtotime($selected_date . ' ' . $period['start']);
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$p_end = strtotime($selected_date . ' ' .$period['end']);
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if ($a_start <= $p_start && $a_end <= $p_end && $a_end <= $p_start) {
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// The appointment does not belong in this time period, so we
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// will not change anything.
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} else if ($a_start <= $p_start && $a_end <= $p_end && $a_end >= $p_start) {
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// The appointment starts before the period and finishes somewhere inside.
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// We will need to break this period and leave the available part.
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$period['start'] = date('H:i', $a_end);
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} else if ($a_start >= $p_start && $a_end <= $p_end) {
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// The appointment is inside the time period, so we will split the period
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// into two new others.
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unset($available_periods_with_appointments[$index]);
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$available_periods_with_appointments[] = array(
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'start' => date('H:i', $p_start),
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'end' => date('H:i', $a_start)
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);
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$available_periods_with_appointments[] = array(
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'start' => date('H:i', $a_end),
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'end' => date('H:i', $p_end)
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);
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} else if ($a_start >= $p_start && $a_end >= $p_start && $a_start <= $p_end) {
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// The appointment starts in the period and finishes out of it. We will
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// need to remove the time that is taken from the appointment.
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$period['end'] = date('H:i', $a_start);
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} else if ($a_start >= $p_start && $a_end >= $p_end && $a_start >= $p_end) {
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// The appointment does not belong in the period so do not change anything.
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} else if ($a_start <= $p_start && $a_end >= $p_end && $a_start <= $p_end) {
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// The appointment is bigger than the period, so this period needs to be removed.
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unset($available_periods_with_appointments[$index]);
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}
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}
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}
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return array_values($available_periods_with_appointments);
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}
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/**
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* Calculate the available appointment hours.
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*
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* Calculate the available appointment hours for the given date. The empty spaces
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* are broken down to 15 min and if the service fit in each quarter then a new
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* available hour is added to the "$available_hours" array.
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*
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* @param array $empty_periods Contains the empty periods as generated by the
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* "_getProviderAvailableTimePeriods" method.
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* @param string $selected_date The selected date to be search (format )
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* @param int $service_duration The service duration is required for the hour calculation.
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* @param bool $manage_mode (optional) Whether we are currently on manage mode (editing an existing appointment).
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* @param string $availabilities_type Optional ('flexible'), the service availabilities type.
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*
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* @return array Returns an array with the available hours for the appointment.
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*/
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protected function _calculateAvailableHours(array $empty_periods, $selected_date, $service_duration,
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$manage_mode = FALSE, $availabilities_type = 'flexible') {
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$this->load->model('settings_model');
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$available_hours = array();
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foreach ($empty_periods as $period) {
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$start_hour = new DateTime($selected_date . ' ' . $period['start']);
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$end_hour = new DateTime($selected_date . ' ' . $period['end']);
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$interval = $availabilities_type === AVAILABILITIES_TYPE_FIXED ? (int)$service_duration : 15;
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$current_hour = $start_hour;
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$diff = $current_hour->diff($end_hour);
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while (($diff->h * 60 + $diff->i) >= intval($service_duration)) {
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$available_hours[] = $current_hour->format('H:i');
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$current_hour->add(new DateInterval('PT' . $interval . 'M'));
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$diff = $current_hour->diff($end_hour);
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}
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}
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// If the selected date is today, remove past hours. It is important include the timeout before
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// booking that is set in the back-office the system. Normally we might want the customer to book
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// an appointment that is at least half or one hour from now. The setting is stored in minutes.
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if (date('m/d/Y', strtotime($selected_date)) === date('m/d/Y')) {
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$book_advance_timeout = $this->settings_model->get_setting('book_advance_timeout');
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foreach($available_hours as $index => $value) {
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$available_hour = strtotime($value);
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$current_hour = strtotime('+' . $book_advance_timeout . ' minutes', strtotime('now'));
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if ($available_hour <= $current_hour) {
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unset($available_hours[$index]);
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}
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}
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}
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$available_hours = array_values($available_hours);
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sort($available_hours, SORT_STRING );
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$available_hours = array_values($available_hours);
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return $available_hours;
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}
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/**
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* Get multiple attendants hours.
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*
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* This method will add the extra appointment hours whenever a service accepts multiple attendants.
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*
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* @param array $available_hours The previously calculated appointment hours.
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* @param int $attendants_number Service attendants number.
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* @param int $service_id Selected service ID.
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* @param string $selected_date The selected appointment date.
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*/
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protected function _getMultipleAttendantsHours(&$available_hours, $attendants_number, $service_id,
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$selected_date) {
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$this->load->model('appointments_model');
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$appointments = $this->appointments_model->get_batch(
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'id_services = ' . $this->db->escape($service_id) . ' AND DATE(start_datetime) = DATE('
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. $this->db->escape(date('Y-m-d', strtotime($selected_date))) . ')');
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foreach($appointments as $appointment) {
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$hour = date('H:i', strtotime($appointment['start_datetime']));
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$current_attendants_number = $this->appointments_model->appointment_count_for_hour($service_id,
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$selected_date, $hour);
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if ($current_attendants_number < $attendants_number && !in_array($hour, $available_hours)) {
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$available_hours[] = $hour;
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}
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}
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$available_hours = array_values($available_hours);
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sort($available_hours, SORT_STRING );
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$available_hours = array_values($available_hours);
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}
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}
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