From 6b861903afa0e2688892707d09752fe2710b8dd7 Mon Sep 17 00:00:00 2001
From: Joachim Lusiardi <joachim@lusiardi.de>
Date: Mon, 2 May 2016 07:59:31 +0200
Subject: [PATCH] add consumption chart

---
 app/rollerverbrauch/templates/statistics.html | 15 +++++++++++++++
 app/rollerverbrauch/tools.py                  |  6 ++++++
 2 files changed, 21 insertions(+)

diff --git a/app/rollerverbrauch/templates/statistics.html b/app/rollerverbrauch/templates/statistics.html
index 24fa010..acbb91e 100644
--- a/app/rollerverbrauch/templates/statistics.html
+++ b/app/rollerverbrauch/templates/statistics.html
@@ -54,6 +54,11 @@
                                 Odometer
                             </a>
                         </li>
+                        <li>
+                            <a href="#v{{vehicle.id}}_c3" id="i{{vehicle.id}}_c3" data-toggle="tab">
+                                Consumption
+                            </a>
+                        </li>
                     </ul>
                     <div id="my-tab-content" class="tab-content">
                         <div class="tab-pane active" id="v{{vehicle.id}}_c1">
@@ -76,6 +81,16 @@
                                 not enough data.
                             {% endif %}
                         </div>
+                       <div class="tab-pane " id="v{{vehicle.id}}_c3">
+                            {% if vehicle.pitstop_count > 0 %}
+    					        <div id="averageUsageDiv{{vehicle.id}}" style="width:100%; height:500px;"></div>
+                                <script type="text/javascript">
+                                    {{ chartScript('averageUsageDiv'+vehicle.id|str, vehicle.average_litres, 'l/100 km') }}
+                                </script>
+                            {% else %}
+                                not enough data.
+                            {% endif %}
+                        </div>
                     </div>
                 </div>
             {% endfor %}
diff --git a/app/rollerverbrauch/tools.py b/app/rollerverbrauch/tools.py
index fca48c8..d33c255 100644
--- a/app/rollerverbrauch/tools.py
+++ b/app/rollerverbrauch/tools.py
@@ -12,6 +12,7 @@ class VehicleStats:
         self.average_litres_fuelled = 0
         self.average_litres_used = 0
         self.litres = []
+        self.average_litres = []
         self.odometers = []
 
         if self.pitstop_count > 0:
@@ -24,6 +25,11 @@ class VehicleStats:
             self.overall_distance = vehicle.pitstops[-1].odometer - vehicle.pitstops[0].odometer
             self.average_distance = self.overall_distance / (self.pitstop_count - 1)
             self.average_litres_used = 100 * (self.overall_litres - vehicle.pitstops[0].litres) / self.overall_distance
+            for index in range(1, self.pitstop_count):
+                last_ps = vehicle.pitstops[index - 1]
+                current_ps = vehicle.pitstops[index]
+                self.average_litres.append(StatsEvent(current_ps.date, round(100 * current_ps.litres/(current_ps.odometer - last_ps.odometer),2)))
+                print(index)
 
 
 class StatsEvent: