From: Pat Thoyts <Patrick.Thoyts@renishaw.com>
Date: Wed, 28 Sep 2016 13:16:09 +0000 (+0100)
Subject: Support days without any data in the history download.
X-Git-Url: http://privyetmir.co.uk/gitweb.cgi?a=commitdiff_plain;h=ced540ac5092f717fd1e7ad900ee5be0a6a0288c;p=spd%2Fsensor-hub.git

Support days without any data in the history download.

If a day has no data then we cannot locate the oldest record so added
the date range in the response and we can use that instead.
This avoids getting stuck in the history download as we fetch 1 day at
a time.
---

diff --git a/sensor-hub.wsgi b/sensor-hub.wsgi
index 2f24f7a..f439c77 100755
--- a/sensor-hub.wsgi
+++ b/sensor-hub.wsgi
@@ -80,7 +80,8 @@ class SensorHubService():
             else:
                 when_until = None
             data = self.get_since(when_from, when_until)
-            res = dict(response="ok", result=[x for x in data], version=self.version)
+            res = dict(response="ok", result=[x for x in data], version=self.version,
+                       range=[when_from, when_until])
         except Exception as e:
             cherrypy.response.headers['content-type'] = 'application/json'
             self.log("error in \"since\": {0}".format(str(e)))
diff --git a/static/sensor-hub.html b/static/sensor-hub.html
index 401f1cc..4ab2e95 100644
--- a/static/sensor-hub.html
+++ b/static/sensor-hub.html
@@ -246,6 +246,9 @@ function add_data(data) {
             plotdata[n].push([t,v]);
         });
     });
+    //if data is empty we need to force 'oldest'
+    if (data.result.length == 0)
+        oldest = data.range[0]*1000;
     $.each(document.custom.plotdata, function(n,plot) {
        document.custom.plotdata[n].data = plotdata[n].concat(plot.data);
     });