10 longest streaks added to days with qsos

application/controllers/Dayswithqso.php

@@ -18,6 +18,7 @@ class Dayswithqso extends CI_Controller {
         $data['page_title'] = "Number of days with QSOs each year";
 
         $data['result'] = $this->dayswithqso_model->getDaysWithQso();
+        $data['streaks'] = $this->dayswithqso_model->getLongestStreak();
 
         $this->load->view('interface_assets/header', $data);
         $this->load->view('dayswithqso/index');

application/models/Dayswithqso_model.php

@@ -15,8 +15,6 @@ class Dayswithqso_model extends CI_Model
         $CI->load->model('Stations');
         $station_id = $CI->Stations->find_active();
 
-
-
         $sql = "select year(COL_TIME_ON) Year, COUNT(DISTINCT TO_DAYS(COL_TIME_ON)) as Days from "
             .$this->config->item('table_name'). " thcv
             where station_id = " . $station_id . " and COL_TIME_ON is not null group by year";
@@ -26,4 +24,69 @@ class Dayswithqso_model extends CI_Model
         return $query->result();
     }
 
+    /*
+     * Function returns the 10 longest streaks of QSOs based on all QSO dates in the log on active station profile
+     */
+    function getLongestStreak() {
+        $dates = $this->getDates();
+        $streak = 1;        // A day with a qso will always be a streak
+        $dateprev = date_create('1900-01-01'); // init variable with an old date
+        $i = 0;
+
+        foreach($dates as $date) {      // Loop through the result set
+            $datecurr = date_create($date->date);
+            if ($dateprev == date_create('1900-01-01')) { // If first run
+                $dateprev = $datecurr;
+            }
+            else {
+                $diff = $dateprev->diff($datecurr)->format("%a"); // Getting date difference between current date and previous date in array
+                if ($diff == 1) {   // If diff = 1, means that we are on a streak
+                    $streak++;
+                    $endstreak = $datecurr; // As long as the streak continues, we update the end date
+                } else {
+                    if ($streak > 1) {
+                        $streaks[$i]['highstreak'] = $streak;
+                        $streaks[$i]['endstreak'] = $endstreak->format('Y-m-d');
+                        $streaks[$i]['beginstreak'] = $endstreak->sub(new DateInterval('P'.($streak-1).'D'))->format('Y-m-d');
+                        $i++;
+                    }
+                    $streak = 1;
+                }
+                $dateprev = date_create($date->date);
+            }
+        }
+
+        if (isset($streaks) && is_array($streaks)) {
+            usort($streaks, array($this,'compareStreak'));      // Sort array, highest streak first
+            $streaks_trimmed = array_slice($streaks, 0,10);  // We only want top 10, so we trim the array
+            return $streaks_trimmed;
+        } else {
+            return null;
+        }
+    }
+
+    /*
+     * Used for sorting the array highest streak first
+     */
+    function compareStreak($a, $b) {
+        return strnatcmp($b['highstreak'], $a['highstreak']);
+    }
+
+    /*
+     * Returns all distinct dates from db on active profile
+     */
+    function getDates() {
+        $CI =& get_instance();
+        $CI->load->model('Stations');
+        $station_id = $CI->Stations->find_active();
+
+        $sql = "select distinct cast(col_time_on as date) as date from "
+            .$this->config->item('table_name'). " thcv
+            where station_id = " . $station_id . " order by date asc";
+
+        $query = $this->db->query($sql);
+
+        return $query->result();
+    }
+
 }

application/views/dayswithqso/index.php

@@ -30,4 +30,30 @@
     }
     ?>
     <canvas id="myChartDiff" width="400" height="150"></canvas>
+    <h2>Longest streak with QSOs in the log</h2>
+    <p>A maximum of the 10 longest streaks are shown!</p>
+    <?php
+    if (is_array($streaks)) {
+        echo '<div id="streaks" class="table-responsive"><table class="qsotable table table-bordered table-hover table-striped table-condensed">';
+
+            echo '<tr>';
+                echo '<th style=\'text-align: center\'>Streak (Continues days with QSOs)</th>';
+                echo '<th style=\'text-align: center\'>Begin date</th>';
+                echo '<th style=\'text-align: center\'>End date</th>';
+                echo '</tr>';
+
+            foreach ($streaks as $streak) {
+                echo '<tr>';
+                echo '<td style=\'text-align: center\'>' . $streak['highstreak'] . '</td>';
+                echo '<td style=\'text-align: center\'>' . $streak['beginstreak'] . '</td>';
+                echo '<td style=\'text-align: center\'>' . $streak['endstreak'] . '</td>';
+                echo '</tr>';
+            }
+
+            echo '</table></div>';
+    }
+    else {
+        echo '<div class="alert alert-danger" role="alert"><a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a>No streak found!</div>';
+    }
+    ?>
 </div>