refactor: move towards a single function to set session variables fro…

…m request variables

Signed-off-by: F.N. Claessen <felix@seita.nl>

flexmeasures/api/dev/sensors.py

@@ -18,10 +18,7 @@
 from flexmeasures.data.models.generic_assets import GenericAsset
 from flexmeasures.data.models.time_series import Sensor
 from flexmeasures.data.services.annotations import prepare_annotations_for_chart
-from flexmeasures.ui.utils.view_utils import (
-    set_chart_type_for_session,
-    set_time_range_for_session,
-)
+from flexmeasures.ui.utils.view_utils import set_session_variables
 
 
 class SensorAPI(FlaskView):
@@ -71,9 +68,8 @@ def get_chart(self, id: int, sensor: Sensor, **kwargs):
         - "width" (an integer number of pixels; without it, the chart will be scaled to the full width of the container (hint: use ``<div style="width: 100%;">`` to set a div width to 100%)
         - "height" (an integer number of pixels; without it, FlexMeasures sets a default, currently 300)
         """
-        # Store selected chart type and time range as session variables, for a consistent UX across UI page loads
-        set_chart_type_for_session()
-        set_time_range_for_session()
+        # Store selected time range and chart type as session variables, for a consistent UX across UI page loads
+        set_session_variables("event_starts_after", "event_ends_before", "chart_type")
         return json.dumps(sensor.chart(**kwargs))
 
     @route("/<id>/chart_data/")

flexmeasures/api/v3_0/assets.py

@@ -16,7 +16,7 @@
 from flexmeasures.api.common.schemas.generic_assets import AssetIdField
 from flexmeasures.api.common.schemas.users import AccountIdField
 from flexmeasures.utils.coding_utils import flatten_unique
-from flexmeasures.ui.utils.view_utils import set_time_range_for_session
+from flexmeasures.ui.utils.view_utils import set_session_variables
 
 
 asset_schema = AssetSchema()
@@ -284,7 +284,8 @@ def get_chart(self, id: int, asset: GenericAsset, **kwargs):
 
         .. :quickref: Chart; Download a chart with time series
         """
-        set_time_range_for_session()
+        # Store selected time range as session variables, for a consistent UX across UI page loads
+        set_session_variables("event_starts_after", "event_ends_before")
         return json.dumps(asset.chart(**kwargs))
 
     @route("/<id>/chart_data/")

flexmeasures/ui/utils/view_utils.py

@@ -110,8 +110,13 @@ def clear_session():
         del session[skey]
 
 
-def set_chart_type_for_session():
-    session["chart_type"] = request.values.get("chart_type")
+def set_session_variables(*var_names: str):
+    """Store request values as session variables, for a consistent UX across UI page loads.
+
+    >>> set_session_variables("event_starts_after", "event_ends_before", "chart_type")
+    """
+    for var_name in var_names:
+        session[var_name] = request.values.get(var_name)
 
 
 def set_time_range_for_session():