added placeholder secondary method id to state

assets/src/scripts/monitoring-location/components/hydrograph/vue-components/secondary-parameter-controls.vue

@@ -23,7 +23,7 @@
 import {ref, inject} from 'vue';
 
 import {useActions} from 'redux-connect-vue';
-import {setSecondaryIVDataVisibility, setCompareDataVisibility, setMedianDataVisibility} from 'ml/store/hydrograph-state';
+import {setSecondaryIVDataVisibility, setCompareDataVisibility, setMedianDataVisibility, setSelectedSecondaryIVMethodID} from 'ml/store/hydrograph-state';
 import {retrieveSecondParameterIVData} from 'ml/store/hydrograph-data';
 import {getTimeRange} from 'ml/selectors/hydrograph-data-selector';
 import {showDataIndicators} from '../data-indicator';
@@ -55,7 +55,8 @@ export default {
       setSecondaryIVDataVisibility,
       setCompareDataVisibility,
       setMedianDataVisibility,
-      retrieveSecondParameterIVData
+      retrieveSecondParameterIVData,
+      setSelectedSecondaryIVMethodID
     });
 
     const showSecondParameterList = ref(false);
@@ -96,6 +97,8 @@ export default {
            endTime: currentTimeRange.end
          }
       ).then(() => {
+        const sortedMethods = 'new method id';
+        actions.setSelectedSecondaryIVMethodID(sortedMethods);
         showDataIndicators(false, reduxStore);
       });
     };

assets/src/scripts/monitoring-location/store/hydrograph-state.js

@@ -10,6 +10,7 @@ export const INITIAL_STATE = {
     selectedTimeSpan: 'P7D',
     selectedParameterCode: null,
     selectedIVMethodID: null,
+    selectedSecondaryIVMethodID: null,
     graphCursorOffset: null,
     graphBrushOffset: null
 };
@@ -75,6 +76,19 @@ export const setSelectedIVMethodID = function(methodID) {
     };
 };
 
+/*
+ * Synchronous action to set the selected method ID secondary parameter (uniquely identifies the IV time series).
+ * Some parameter codes have more than one IV time series. The method ID distinguishes these
+ * @param {String} methodID
+ * @return {Object} - Redux action
+ */
+export const setSelectedSecondaryIVMethodID = function(methodID) {
+    return {
+        type: 'SET_SELECTED_SECONDARY_IV_METHOD_ID',
+        methodID
+    };
+};
+
 /*
  * Synchronous action sets the time span of the hydrograph.
  * @param {String or Object} timeSpan - Can either be a String representing an ISO8601 Duration or an
@@ -178,6 +192,12 @@ export const hydrographStateReducer = function(hydrographState = INITIAL_STATE,
                 selectedIVMethodID: action.methodID
             };
 
+        case 'SET_SELECTED_SECONDARY_IV_METHOD_ID':
+            return {
+                ...hydrographState,
+                selectedSecondaryIVMethodID: action.methodID
+            };
+
         case 'SET_SELECTED_TIME_SPAN':
             if (typeof action.timeSpan === 'string') {
                 return {