192 lines
No EOL
6.4 KiB
PHP
192 lines
No EOL
6.4 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 $exclude_appointments This array contains the ids of
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* the appointments that will not be taken into consideration when
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* the available time periods are calculated.
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* @return array Returns an array with the available time periods of
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* the provider.
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*/
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private function get_provider_available_time_periods($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)' =>
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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 =
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$this->appointments_model->get_batch($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[$index]);
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}
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}
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}
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// Find the empty spaces on the plan. The first split between
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// the plan is due to a break (if exist). After that every
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// reserved appointment is considered to be a taken space in the
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// plan.
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$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 = $selected_date_working_plan
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['breaks'][$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 = array();
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if (count($reserved_appointments) > 0) {
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foreach($available_periods_with_breaks as $period) {
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foreach($reserved_appointments as $index=>$reserved) {
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$appointment_start =
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date('H:i', strtotime($reserved['start_datetime']));
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$appointment_end =
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date('H:i', strtotime($reserved['end_datetime']));
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$period_start =
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date('H:i', strtotime($period['start']));
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$period_end =
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date('H:i', strtotime($period['end']));
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if ($period_start <= $appointment_start
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&& $period_end >= $appointment_end) {
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// We need to check whether another appointment fits
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// in the current time period. If this happens, then
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// we need to consider the whole appointment time as
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// one, because the provider will not be available.
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foreach ($reserved_appointments as $tmp_appointment) {
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$appt_start = date('H:i',
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strtotime($tmp_appointment['start_datetime']));
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$appt_end = date('H:i',
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strtotime($tmp_appointment['end_datetime']));
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if ($period_start < $appt_start
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&& $period_end > $appt_end) {
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if ($appointment_start > $appt_start) {
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$appointment_start = $appt_start;
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}
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if ($appointment_end < $appt_end) {
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$appointment_end = $appt_end;
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}
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}
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}
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// Current appointment is within the current
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// empty space. So we need to break the empty
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// space into two other spaces that don't include
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// the appointment.
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$new_period = array(
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'start' => $period_start,
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'end' => $appointment_start
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);
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if (!in_array($new_period,
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$available_periods_with_appointments)) {
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$available_periods_with_appointments[] = $new_period;
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}
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$new_period = array(
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'start' => $appointment_end,
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'end' => $period_end
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);
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if (!in_array($new_period,
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$available_periods_with_appointments)) {
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$available_periods_with_appointments[] = $new_period;
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}
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} else {
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// Check if there are any other appointments
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// between this time space. If not, it is going
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// to be added as it is.
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$found = FALSE;
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foreach ($reserved_appointments as $tmp_appointment) {
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$appt_start = date('H:i',
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strtotime($tmp_appointment['start_datetime']));
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$appt_end = date('H:i',
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strtotime($tmp_appointment['end_datetime']));
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if ($period_start < $appt_start
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&& $period_end > $appt_end) {
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$found = TRUE;
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}
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}
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// It is also necessary to check that this time
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// period doesn't already exist in the
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// "$empty_spaces_with_appointments" array.
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$empty_period = array(
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'start' => $period_start,
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'end' => $period_end
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);
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$already_exist = in_array($empty_period,
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$available_periods_with_appointments);
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if ($found === FALSE && $already_exist === FALSE) {
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$available_periods_with_appointments[] = $empty_period;
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}
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}
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}
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}
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} else {
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$available_periods_with_appointments =
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$available_periods_with_breaks;
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}
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return $available_periods_with_appointments;
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} |