display index updates to most currently modified date within range array

.gitignore

@@ -5,3 +5,4 @@
 /node_modules
 /umd
 npm-debug.log*
+.idea

src/Calendar/withMultipleRanges.js

@@ -68,7 +68,7 @@ export const withMultipleRanges = compose(
     passThrough: {
       ...passThrough,
       Day: {
-        onClick: (date) => handleSelect(date, {selected, ...props}),
+        onClick: (date) => handleSelect(date, {selected, setDisplayIndex, ...props}),
         handlers: {
           onMouseOver: !isTouchDevice && props.selectionStart
             ? (e) => handleMouseOver(e, {selected, ...props})
@@ -101,34 +101,36 @@ function getSortedSelection({start, end}) {
     : {start: end, end: start};
 }
 
-function handleSelect(date, {onSelect, selected, selectionStart, setSelectionStart, selectionStartIdx, setSelectionStartIdx}) {
+function handleSelect(date, {onSelect, selected, selectionStart, setSelectionStart, selectionStartIdx, setSelectionStartIdx, setDisplayIndex}) {
   const positionOfDate = determineIfDateAlreadySelected(date, selected);
-  const funcs = {onSelect, setSelectionStart, setSelectionStartIdx};
+  const funcs = {onSelect, setSelectionStart, setSelectionStartIdx, setDisplayIndex};
 
   if(positionOfDate.value && !selectionStart) { //selecting an already defined range
     const selectedDate = selected[positionOfDate.index];//not clone so modding this is modding selected
     selectedDate.end = date; //not possible to have start/end reversed when clicking on already set range
 
-    updateSelectedState(selectedDate.start, positionOfDate.index, selected, funcs);//grab index of selected and set in state
+    updateSelectedState(positionOfDate.index, selectedDate.start, positionOfDate.index, selected, funcs);//grab index of selected and set in state
   } else if (selectionStart) { //ending date range selection
     if (positionOfDate.value === PositionTypes.START && !(date < selectionStart)) { //if in process and selecting start, assume they want to cancel
-      updateSelectedState(null, null, [...selected.slice(0, positionOfDate.index), ...selected.slice(positionOfDate.index+1)], funcs);
+      const displayIdx = positionOfDate.index > 0 ? positionOfDate.index -1 : 0;
+      updateSelectedState(displayIdx, null, null, [...selected.slice(0, positionOfDate.index), ...selected.slice(positionOfDate.index+1)], funcs);
     } else {
       selected[selectionStartIdx] = { //modifying passed in object without clone due to immediate set state
         ...getSortedSelection({
           start: selectionStart,
           end: date,
         }),
       };
-      updateSelectedState(null, null, selected, funcs);
+      updateSelectedState(positionOfDate.index, null, null, selected, funcs);
     }
   } else { //starting new date range
-    updateSelectedState(date, selected.length, selected.concat({eventType:EVENT_TYPES.START, start: date, end: date}), funcs)//length accounts for increase due to concat
+    updateSelectedState(selected.length, date, selected.length, selected.concat({eventType:EVENT_TYPES.START, start: date, end: date}), funcs)//length accounts for increase due to concat
   }
 }
 
-function updateSelectedState(selectStart, selectStartIdx, selected, {onSelect, setSelectionStart, setSelectionStartIdx}) {
+function updateSelectedState(displayIdx, selectStart, selectStartIdx, selected, {onSelect, setSelectionStart, setSelectionStartIdx, setDisplayIndex}) {
   onSelect(selected);
+  setDisplayIndex(displayIdx);
   setSelectionStart(selectStart);
   setSelectionStartIdx(selectStartIdx);
 }