<?php

/**
 * Main dashboard file for displaying conference statistics.
 *
 * This page ("dashboard") connects to the database and displays various widgets:
 * 1. Monthly statistics for the past year.
 * 2. Conferences from the last 2 days.
 * 3. The most recent 10 conferences.
 */

require '../app/classes/conference.php';
require '../app/classes/participant.php';

// connect to database
$response = connectDB($config, 'jilo', $platformDetails[0]['jilo_database'], $platform_id);

// if DB connection has error, display it and stop here
if ($response['db'] === null) {
    $error = $response['error'];
    include '../app/templates/block-message.php';

// otherwise if DB connection is OK, go on
} else {
    $db = $response['db'];

    $conferenceObject = new Conference($db);
    $participantObject = new Participant($db);


    /**
     * Monthly usage statistics for the last year.
     *
     * Retrieves conference and participant numbers for each month within the past year.
     */

    // monthly conferences for the last year
    $fromMonth = (new DateTime())->sub(new DateInterval('P1Y'));
    $fromMonth->modify('first day of this month');
    $thisMonth = new DateTime();
    $from_time = $fromMonth->format('Y-m-d');
    $until_time = $thisMonth->format('Y-m-d');

    $widget['records'] = array();

    // loop 1 year in the past
    $i = 0;
    while ($fromMonth < $thisMonth) {

        $untilMonth = clone $fromMonth;
        $untilMonth->modify('last day of this month');

        $from_time = $fromMonth->format('Y-m-d');
        $until_time = $untilMonth->format('Y-m-d');

        $searchConferenceNumber = $conferenceObject->conferenceNumber($from_time, $until_time);
        $searchParticipantNumber = $participantObject->participantNumber($from_time, $until_time);

        // pretty format for displaying the month in the widget
        $month = $fromMonth->format('F Y');

        // populate the records
        $widget['records'][$i] = array(
            'from_time'	=> $from_time,
            'until_time'	=> $until_time,
            'table_headers'	=> $month,
            'conferences'	=> $searchConferenceNumber[0]['conferences'],
            'participants'	=> $searchParticipantNumber[0]['participants'],
        );

        // move everything one month in future
        $untilMonth->add(new DateInterval('P1M'));
        $fromMonth->add(new DateInterval('P1M'));
        $i++;
    }

    $time_range_specified = true;

    // prepare the widget
    $widget['full'] = false;
    $widget['name'] = 'LastYearMonths';
    $widget['title'] = 'Conferences monthly stats for the last year';
    $widget['collapsible'] = true;
    $widget['collapsed'] = false;
    $widget['filter'] = false;
    if (!empty($searchConferenceNumber) && !empty($searchParticipantNumber)) {
        $widget['full'] = true;
    }
    $widget['pagination'] = false;


    // display the widget
    include '../app/templates/widget-monthly.php';


    /**
     * Conferences in the last 2 days.
     *
     * Displays a summary of all conferences held in the past 48 hours.
     */

    // time range limit
    $from_time = date('Y-m-d', time() - 60 * 60 * 24 * 2);
    $until_time = date('Y-m-d', time());
    $time_range_specified = true;

    // prepare the result
    $search = $conferenceObject->conferencesAllFormatted($from_time, $until_time);

    if (!empty($search)) {
        $conferences = array();
        $conferences['records'] = array();

        foreach ($search as $item) {
            extract($item);

            // we don't have duration field, so we calculate it
            if (!empty($start) && !empty($end)) {
                $duration = gmdate("H:i:s", abs(strtotime($end) - strtotime($start)));
            } else {
                $duration = '';
            }
            $conference_record = array(
                // assign title to the field in the array record
                'component'		=> $jitsi_component,
                'start'			=> $start,
                'end'			=> $end,
                'duration'		=> $duration,
                'conference ID'		=> $conference_id,
                'conference name'	=> $conference_name,
                'participants'		=> $participants,
                'name count'		=> $name_count,
                'conference host'	=> $conference_host
            );
            // populate the result array
            array_push($conferences['records'], $conference_record);
        }
    }

    // prepare the widget
    $widget['full'] = false;
    $widget['name'] = 'LastDays';
    $widget['title'] = 'Conferences for the last 2 days';
    $widget['collapsible'] = true;
    $widget['collapsed'] = false;
    $widget['filter'] = false;
    if (!empty($conferences['records'])) {
        $widget['full'] = true;
        $widget['table_headers'] = array_keys($conferences['records'][0]);
        $widget['table_records'] = $conferences['records'];
    }
    $widget['pagination'] = false;

    // display the widget
    include '../app/templates/widget.php';


    /**
     * Last 10 conferences.
     *
     * Displays the 10 most recent conferences in the database.
     */

    // all time
    $from_time = '0000-01-01';
    $until_time = '9999-12-31';
    $time_range_specified = false;
    // number of conferences to show
    $conference_number = 10;

    // prepare the result
    $search = $conferenceObject->conferencesAllFormatted($from_time, $until_time);

    if (!empty($search)) {
        $conferences = array();
        $conferences['records'] = array();

        $i = 0;
        foreach ($search as $item) {
            extract($item);

            // we don't have duration field, so we calculate it
            if (!empty($start) && !empty($end)) {
                $duration = gmdate("H:i:s", abs(strtotime($end) - strtotime($start)));
            } else {
                $duration = '';
            }
            $conference_record = array(
                // assign title to the field in the array record
                'component'		=> $jitsi_component,
                'start'			=> $start,
                'end'			=> $end,
                'duration'		=> $duration,
                'conference ID'		=> $conference_id,
                'conference name'	=> $conference_name,
                'participants'		=> $participants,
                'name count'		=> $name_count,
                'conference host'	=> $conference_host
            );
            // populate the result array
            array_push($conferences['records'], $conference_record);

            // we only take the first 10 results
            $i++;
            if ($i == 10) break;
        }
    }

    // prepare the widget
    $widget['full'] = false;
    $widget['name'] = 'LastConferences';
    $widget['title'] = 'The last ' . $conference_number . ' conferences';
    $widget['collapsible'] = true;
    $widget['collapsed'] = false;
    $widget['filter'] = false;
    $widget['pagination'] = false;

    if (!empty($conferences['records'])) {
        $widget['full'] = true;
        $widget['table_headers'] = array_keys($conferences['records'][0]);
        $widget['table_records'] = $conferences['records'];
    }

    // display the widget
    include '../app/templates/widget.php';

}

?>