Cloudlog/application/models/Timeplotter_model.php

<?php
if (!defined('BASEPATH')) exit('No direct script access allowed');

class Timeplotter_model extends CI_Model
{
    function __construct()
    {
        // Call the Model constructor
        parent::__construct();
    }

    function get_worked_bands() {
        $CI =& get_instance();
        $CI->load->model('Stations');
        $station_id = $CI->Stations->find_active();

        $data = $this->db->query(
            "SELECT distinct LOWER(`COL_BAND`) as `COL_BAND` FROM `" . $this->config->item('table_name') . "` WHERE station_id = " . $station_id . " AND COL_PROP_MODE != \"SAT\""
        );
        $worked_slots = array();
        foreach ($data->result() as $row) {
            array_push($worked_slots, $row->COL_BAND);
        }

        $SAT_data = $this->db->query(
            "SELECT distinct LOWER(`COL_PROP_MODE`) as `COL_PROP_MODE` FROM `" . $this->config->item('table_name') . "` WHERE station_id = " . $station_id . " AND COL_PROP_MODE = \"SAT\""
        );

        foreach ($SAT_data->result() as $row) {
            array_push($worked_slots, strtoupper($row->COL_PROP_MODE));
        }

        // bring worked-slots in order of defined $bandslots
        $results = array();
        foreach (array_keys($this->bandslots) as $slot) {
            if (in_array($slot, $worked_slots)) {
                array_push($results, $slot);
            }
        }
        return $results;
    }

    public $bandslots = array("160m" => 0,
        "80m" => 0,
        "60m" => 0,
        "40m" => 0,
        "30m" => 0,
        "20m" => 0,
        "17m" => 0,
        "15m" => 0,
        "12m" => 0,
        "10m" => 0,
        "6m" => 0,
        "4m" => 0,
        "2m" => 0,
        "70cm" => 0,
        "23cm" => 0,
        "13cm" => 0,
        "9cm" => 0,
        "6cm" => 0,
        "3cm" => 0,
        "1.25cm" => 0,
        "SAT" => 0,
    );

    function getTimes($postdata) {
        $CI =& get_instance();
        $CI->load->model('Stations');
        $station_id = $CI->Stations->find_active();

        $this->db->select('time(col_time_on) time, col_call as callsign');

        if ($postdata['band'] != 'All') {
            if ($postdata['band'] == 'SAT') {
                $this->db->where('col_prop_mode', $postdata['band']);
            }
            else {
                $this->db->where('col_band', $postdata['band']);
            }
        }

        if ($postdata['dxcc'] != 'All') {
            $this->db->where('col_dxcc', $postdata['dxcc']);
        }

        if ($postdata['cqzone'] != 'All') {
            $this->db->where('col_cqz', $postdata['cqzone']);
        }

        $this->db->where('station_id', $station_id);
        $datearray = $this->db->get($this->config->item('table_name'));
        $this->plot($datearray->result_array());
    }

    /*
    * Function generates the array, checks for array entries, and adds them before returning data ready for plot
    */
    function plot($log) {

        $start = "00:00";
        $end = "23:59";

        $tStart = strtotime($start);
        $tEnd = strtotime($end);
        $tNow = $tStart;
        $i = 0;

        while($tNow <= $tEnd){                          // Generates the time array
            $label = date("H:i",$tNow).'z - ';
            $tNow = strtotime('+30 minutes',$tNow);
            $label .= date("H:i",$tNow).'z';
            $dataarray[$i]['time'] =  $label;   // Used in x-axis of graph to show label for the timeslot
            $dataarray[$i]['count'] = '0'; // Used to hold number of contacts found in the timeslot
            $dataarray[$i]['calls'] = ''; // Used for holding callsigns of contacts in that timeslot
            $dataarray[$i]['callcount'] = '0'; // Used for counting how many callsigns stored in that timeslot
            $i++;
        }

        foreach ($log as $line) {       // Looping through all the timestamps found in the log
            $time = $line['time'];									// Resolution is 30, calculates where to put result in array
            $dt = new DateTime("1970-01-01 $time", new DateTimeZone('UTC'));
            $arrayplacement = (int)$dt->getTimestamp();
            $arrayplacement = floor($arrayplacement / 1800);
            $dataarray[$arrayplacement]['count']++;

            $callCount = $dataarray[$arrayplacement]['callcount'];

            if ($callCount < 5) {   // We only save a max of 5 calls to show in the graph
                if ($callCount > 0) {
                    $dataarray[$arrayplacement]['calls'] .= ', ';
                }
                $dataarray[$arrayplacement]['calls'] .= $line['callsign'];
                $dataarray[$arrayplacement]['callcount']++;
            }
        }

        if (count($log) != 0) {  // If we have a result from the log
            header('Content-Type: application/json');
            $data['qsocount'] = count($log);
            $data['ok'] = 'OK';
            $data['qsodata'] = $dataarray;
            echo json_encode($data);
        }
        else {
            header('Content-Type: application/json');
            $data['error'] = 'No QSOs found to plot!';
            echo json_encode($data);
        }

    }
}