hide satellites selection if there are not satellite QSOs in

statistics
distances worked
gridsquares

application/controllers/Gridsquares.php

@@ -17,7 +17,15 @@ class Gridsquares extends CI_Controller {
 
 
 	public function index() {
-		$data['page_title'] = "Satellite Gridsquare Map";
+		// if there are no satelite QSOs redirect to band selection directly
+		$this->load->model('logbook_model');
+		$total_sat = $this->logbook_model->total_sat();
+		if ($total_sat->num_rows() == 0) {
+			redirect('gridsquares/band/2m');
+			return;
+		}
+
+		$data['page_title'] = "Gridsquare Map";
 
 		$this->load->view('interface_assets/header', $data);
 		$this->load->view('gridsquares/main.php');

application/models/Logbook_model.php

@@ -1279,7 +1279,8 @@ class Logbook_model extends CI_Model {
 
       $this->db->select('COL_SAT_NAME, COUNT( * ) as count', FALSE);
       $this->db->where_in('station_id', $logbooks_locations_array);
-      $this->db->where('COL_SAT_NAME !=', 'null');
+      $this->db->where('COL_SAT_NAME is not null');
+      $this->db->where('COL_SAT_NAME !=', '');
       $this->db->group_by('COL_SAT_NAME');
       $query = $this->db->get($this->config->item('table_name'));
 

application/views/distances/index.php

@@ -8,11 +8,14 @@
         <form class="form-inline">
             <label class="my-1 mr-2" for="distplot_bands">Band Selection</label>
             <select class="custom-select my-1 mr-sm-2"  id="distplot_bands">
+                <?php if (count($sats_available) != 0) { ?>
                     <option value="sat">SAT</option>
+                <?php } ?>
                 <?php foreach($bands_available as $band) {
                     echo '<option value="' . $band . '"' . '>' . $band . '</option>'."\n";
                 } ?>
             </select>
+            <?php if (count($sats_available) != 0) { ?>
                 <label class="my-1 mr-2" for="distplot_sats">Satellite</label>
                 <select class="custom-select my-1 mr-sm-2"  id="distplot_sats">
                     <option value="All">All</option>
@@ -20,6 +23,9 @@
                         echo '<option value="' . $sat . '"' . '>' . $sat . '</option>'."\n";
                     } ?>
                 </select>
+            <?php } else { ?>
+                <input id="distplot_sats" type="hidden" value="All"></input>
+            <?php } ?>
             <button id="plot" type="button" name="plot" class="btn btn-primary" onclick="distPlot(this.form)">Plot</button>
         </form>
     </div>

application/views/statistics/index.php

@@ -13,7 +13,7 @@
 		google.setOnLoadCallback(drawBandChart);
 	<?php } ?>
 
-	<?php if ($total_sat) { ?>
+	<?php if ($total_sat && $total_sat->num_rows() != 0) { ?>
 		google.setOnLoadCallback(drawSatChart);
 	<?php } ?>
 
@@ -208,6 +208,7 @@
 
 	<br>
 
+	<?php if ($total_sat && $total_sat->num_rows() != 0) { ?>
 		<ul class="nav nav-tabs" id="myTab" role="tablist">
 			<li class="nav-item">
 				<a class="nav-link active" id="home-tab" data-toggle="tab" href="#home" role="tab" aria-controls="home" aria-selected="true">General</a>
@@ -216,6 +217,7 @@
 				<a class="nav-link" id="satellite-tab" data-toggle="tab" href="#satellite" role="tab" aria-controls="satellite" aria-selected="false">Satellites</a>
 			</li>
 		</ul>
+	<?php } ?>
 
 	<div class="tab-content" id="myTabContent">
 		<div class="tab-pane fade show active" id="home" role="tabpanel" aria-labelledby="home-tab">