Offline CP calculations for OTW

A new table in the database with precalculated CP values. The data
are updated through RQ/Celery asynchronous functions

rowers/tasks.py

@@ -26,7 +26,7 @@ from utils import deserialize_list
 
 from rowers.dataprepnodjango import (
     update_strokedata, new_workout_from_file,
-    getsmallrowdata_db, 
+    getsmallrowdata_db, updatecpdata_sql
 )
 
 from django.core.mail import send_mail, EmailMessage
@@ -402,7 +402,26 @@ def handle_otwsetpower(f1, boattype, weightvalue,
 
 # This function generates all the static (PNG image) plots
 
+@app.task
+def handle_updatecp(rower_id,workoutids,debug=False):
+    columns = ['power','workoutid','time']
+    df = getsmallrowdata_db(columns,ids=workoutids,debug=debug)
+    dfgrouped = df.groupby(['workoutid'])
 
+    if not df.empty:
+        maxt = 1.05*df['time'].max()/1000.
+    else:
+        maxt = 1000.
+
+    logarr = datautils.getlogarr(maxt)
+
+        
+    delta,cpvalue,avgpower = datautils.getcp(dfgrouped,logarr)
+
+    updatecpdata_sql(rower_id,delta,cpvalue,debug=debug)
+
+    return 1
+        
 @app.task
 def handle_makeplot(f1, f2, t, hrdata, plotnr, imagename):