Don't display analytics if not enough data

app/Model/ProjectAnalytic.php

@@ -34,6 +34,10 @@ class ProjectAnalytic extends Base
             );
         }
 
+        if ($total === 0) {
+            return array();
+        }
+
         foreach ($metrics as &$metric) {
             $metric['percentage'] = round(($metric['nb_tasks'] * 100) / $total, 2);
         }
@@ -71,6 +75,10 @@ class ProjectAnalytic extends Base
             $metrics[$user]['nb_tasks']++;
         }
 
+        if ($total === 0) {
+            return array();
+        }
+
         foreach ($metrics as &$metric) {
             $metric['percentage'] = round(($metric['nb_tasks'] * 100) / $total, 2);
         }

app/Template/analytic/tasks.php

@@ -1,6 +1,10 @@
 <div class="page-header">
     <h2><?= t('Task distribution') ?></h2>
 </div>
+
+<?php if (empty($metrics)): ?>
+    <p class="alert"><?= t('Not enough data.') ?></p>
+<?php else: ?>
     <section id="analytic-task-repartition">
 
     <div id="chart" data-url="<?= Helper\u('analytic', 'tasks', array('project_id' => $project['id'])) ?>"></div>
@@ -27,3 +31,4 @@
     </table>
 
     </section>
+<?php endif ?>

app/Template/analytic/users.php

@@ -1,6 +1,10 @@
 <div class="page-header">
     <h2><?= t('User repartition') ?></h2>
 </div>
+
+<?php if (empty($metrics)): ?>
+    <p class="alert"><?= t('Not enough data.') ?></p>
+<?php else: ?>
     <section id="analytic-user-repartition">
 
     <div id="chart" data-url="<?= Helper\u('analytic', 'users', array('project_id' => $project['id'])) ?>"></div>
@@ -27,3 +31,4 @@
     </table>
 
     </section>
+<?php endif ?>