Update historygenerator.py to use historical values from CSV

bin/user/historygenerator.py

@@ -36,6 +36,8 @@ import os.path
 import weewx.units
 import weeutil.weeutil
 
+import csv
+
 try:
     from weeutil.weeutil import accumulateLeaves
 except:
@@ -301,6 +303,9 @@ class MyXSearch(SearchList):
         if NOAA is False and summary_column:
             table_dict["header"]["summary"] = 'Year'
 
+        weewx_startdate = int(table_options["weewx_startdate"]) # TP
+        startdate = int(table_options["startdate"])
+
         for year in table_stats.years():
             year_number = datetime.fromtimestamp(year.timespan[0]).year
             value = {"value": str(year_number)}
@@ -309,6 +314,9 @@ class MyXSearch(SearchList):
                 value["url"] = dt.strftime(table_options['year_filename'])
             line = {"head": value, "values": []}
 
+            csvFile = open("/etc/weewx/historic_data.csv")
+            csvReader = csv.DictReader(csvFile) # TP
+          
             for month in year.months():
                 if NOAA is True:
                     noaa_value = {"value": ""}
@@ -317,6 +325,22 @@ class MyXSearch(SearchList):
                         noaa_value["value"] = dt.strftime("%m-%y")
                         noaa_value["url"] = dt.strftime(table_options['month_filename'])
                     line["values"].append(noaa_value)
+                elif month.timespan[0] < weewx_startdate and month.timespan[0] >= startdate and table in csvReader.fieldnames: # TP - use historical data here
+                    month_number = datetime.fromtimestamp(month.timespan[0]).month
+                    historic_value = 0
+                    for row in csvReader:
+                        if int(row["year"]) == year_number and int(row["month"]) == month_number:
+                            try:
+                                historic_value = float(row[table])
+                            except KeyError:
+                                historic_value = historic_value
+                            except ValueError:
+                                historic_value = "NA"
+                            break
+                    if historic_value == "NA":
+                        line["values"].append(self._colorCell([None,1,"mile_per_hour"], format_string, cell_colors, month))
+                    else:
+                        line["values"].append(self._colorCell([historic_value,1,"mile_per_hour"], format_string, cell_colors, month))
                 else:
                     # update the binding to access the right DB
                     obs_month = getattr(month, obs_type)