139 lines
5.2 KiB
PHP
139 lines
5.2 KiB
PHP
<?php
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/**
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* Get an array containing the free time periods (start - end) of a
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* selected date.
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*
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* This method is very important because there are many cases where
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* the system needs to know when a provider is avaible for an
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* appointment. This method will return an array that belongs to the
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* 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 numeric $provider_id The provider's record id.
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* @param string $selected_date The date to be checked (MySQL
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* formatted string).
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* @param array $exclude_appointments This array contains the ids of
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* the appointments that will not be taken into consideration when the
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* available time periods are calculated.
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* @return array Returns an array with the available time periods of
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* the provider.
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*/
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private function get_provider_available_time_periods($provider_id,
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$selected_date, $exclude_appointments = array()) {
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$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
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->get_setting('working_plan', $provider_id), true);
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$where_clause = array(
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'DATE(start_datetime)'=>date('Y-m-d', strtotime($selected_date)),
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'id_users_provider'=>$provider_id
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);
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$reserved_appointments = $this->appointments_model
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->get_batch($where_clause);
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// Sometimes it might be necessary to not take into account some
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// appointment records in order to display what the providers'
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// 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[$index]);
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}
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}
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}
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// Find the empty spaces on the plan. The first split between the
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// plan is due to a break (if exist). After that every reserved
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// appointment is considered to be a taken space in the plan.
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$selected_date_working_plan =
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$working_plan[strtolower(date('l', strtotime($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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foreach($selected_date_working_plan['breaks'] as $index=>$break){
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// Split the working plan to available time periods that do not
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// contain the breaks in them.
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$last_break_index = $index - 1;
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if (count($available_periods_with_breaks) === 0) {
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$start_hour = $selected_date_working_plan['start'];
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$end_hour = $break['start'];
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} else {
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$start_hour = $selected_date_working_plan['breaks']
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[$last_break_index]['end'];
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$end_hour = $break['start'];
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}
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$available_periods_with_breaks[] = array(
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'start' => $start_hour,
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'end' => $end_hour
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);
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}
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// Add the period from the last break to the end of the day.
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$available_periods_with_breaks[] = array(
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'start'=>$selected_date_working_plan['breaks'][$index]['end'],
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'end'=>$selected_date_working_plan['end']
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);
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}
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// Break the empty periods with the reserved appointments.
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$available_periods_with_appointments =
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$available_periods_with_breaks;
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foreach($reserved_appointments as $appointment) {
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foreach($available_periods_with_appointments as $index=>&$period){
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$a_start =
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date('H:i',strtotime($appointment['start_datetime']));
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$a_end =
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date('H:i', strtotime($appointment['end_datetime']));
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$p_start =
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date('H:i', strtotime($period['start']));
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$p_end =
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date('H:i', strtotime($period['end']));
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if ($a_start <= $p_start && $a_end <= $p_end
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&& $a_end <= $p_start) {
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// The appointment does not belong in this time period, so
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// we will not change anything.
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} else if ($a_start <= $p_start && $a_end <= $p_end
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&& $a_end >= $p_start) {
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// The appointment starts before the period and finishes
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// somewhere inside.We will need to break this period and
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// leave the available part.
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$period['start'] = $a_end;
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} else if ($a_start >= $p_start && $a_end <= $p_start) {
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// The appointment is inside the time period, so we will
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// split the period into two new others.
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unset($available_periods_with_appointments[$index]);
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$available_periods_with_appointments[] = array(
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'start' => $p_start,
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'end' => $a_start
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);
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$available_periods_with_appointments[] = array(
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'start' => $a_end,
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'end' => $p_end
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);
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} else if ($a_start >= $p_start && $a_end >= $p_start
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&& $a_start <= $p_end) {
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// The appointment starts in the period and finishes out
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// of it. We will need to remove the time that is taken
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// from the appointment.
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$period['end'] = $a_start;
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} else if ($a_start >= $p_start && $a_end >= $p_end
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&& $a_start >= $p_end) {
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// The appointment does not belong in the period so do not
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// change anything.
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} else if ($a_start <= $p_start && $a_end >= $p_end
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&& $a_start <= $p_end) {
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// The appointment is bigger than the period, so this period
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// needs to be removed.
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unset($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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} |