feat(layer-tabs): add collapsible layer-selector, highlight selected …

src/scripts/actions/set-selected-layer.ts

@@ -1,6 +1,6 @@
 export const SET_SELECTED_LAYER_ID = 'SET_SELECTED_LAYER_ID';
 
-export type LayerId = string;
+export type LayerId = string | null;
 
 export interface SetSelectedLayerIdAction {
   type: typeof SET_SELECTED_LAYER_ID;

src/scripts/components/app/app.styl

@@ -4,3 +4,4 @@
 
 .app
   height: 100%
+  font-family: Arial, Helvetica, sans-serif

src/scripts/components/layer-list/layer-list.styl

@@ -4,16 +4,26 @@
     padding: 0
     margin: 0
     background-color: #fff
+    list-style: none
 
 .layerItem
     padding: 15px
     font-size: 1.1em
 
+.layerItem:hover, 
+.layerItem:focus
+    background-color: #e0f1ff
+
+.layerItemSelected,
+.layerItemSelected:hover
+.layerItemSelected:focus
+    background-color:#a8d7ff
+
 .subLayerItem
     margin: 5px
     padding: 15px
     font-size: 1em
 
-.layerItem:hover, 
-.layerItem:focus
-    background-color: #e0f1ff
+.subLayerItemSelected
+    background-color: #a8d7ff
+

src/scripts/components/layer-list/layer-list.tsx

@@ -1,25 +1,28 @@
 import React, {FunctionComponent, MouseEvent} from 'react';
+import cx from 'classnames';
 import {Layer} from '../../actions/fetch-layers';
 import styles from './layer-list.styl';
 
 interface Props {
   layers: Layer[];
-  selected: string;
+  selected: string | null;
   onSelect: (id: string) => void;
 }
 
-const LayerList: FunctionComponent<Props> = ({layers, onSelect}) => (
+const LayerList: FunctionComponent<Props> = ({layers, selected, onSelect}) => (
   <ul className={styles.layerList}>
     {layers.map(layer => {
       const layerClickHandler = () => {
         if (layer.subLayers.length === 0) {
           onSelect(layer.id);
         }
       };
-
+      const layerItemClass = cx(styles.layerItem, {
+        [styles.layerItemSelected]: selected === layer.id
+      });
       return (
         <li
-          className={styles.layerItem}
+          className={layerItemClass}
           key={layer.id}
           onClick={() => layerClickHandler()}>
           {layer.name}
@@ -31,9 +34,12 @@ const LayerList: FunctionComponent<Props> = ({layers, onSelect}) => (
                   event.stopPropagation();
                   onSelect(subLayer.id);
                 };
+                const subLayerItemClass = cx(styles.subLayerItem, {
+                  [styles.subLayerItemSelected]: selected === subLayer.id
+                });
                 return (
                   <li
-                    className={styles.subLayerItem}
+                    className={subLayerItemClass}
                     key={subLayer.id}
                     onClick={event => subLayerClickHandler(event)}>
                     {subLayer.name}

src/scripts/components/layer-selector/layer-selector.tsx

@@ -1,6 +1,7 @@
 import React, {FunctionComponent, useEffect, useState} from 'react';
 import {useSelector, useDispatch} from 'react-redux';
 import {layersSelector} from '../../reducers/layers';
+import {selectedLayerIdSelector} from '../../reducers/selected-layer-id';
 import fetchLayers from '../../actions/fetch-layers';
 import {setSelectedLayerIdAction} from '../../actions/set-selected-layer';
 import LayerList from '../layer-list/layer-list';
@@ -9,6 +10,7 @@ import styles from './layer-selector.styl';
 
 const LayerSelector: FunctionComponent<{}> = () => {
   const layers = useSelector(layersSelector);
+  const layerIds = useSelector(selectedLayerIdSelector);
   const dispatch = useDispatch();
   const tabs = [
     {
@@ -22,7 +24,27 @@ const LayerSelector: FunctionComponent<{}> = () => {
   ];
 
   const [activeTabId, setActiveTabId] = useState(tabs[0].id);
+  const [isOpen, setIsOpen] = useState(false);
   const isMainTabSelected = activeTabId === tabs[0].id;
+  const selectedLayer = isMainTabSelected ? layerIds.main : layerIds.compare;
+
+  const onTabClick = (id: string) => {
+    setActiveTabId(id);
+
+    if (!isOpen) {
+      setIsOpen(true);
+      return;
+    }
+
+    if (activeTabId === id) {
+      setIsOpen(false);
+    }
+  };
+
+  const onLayerClick = (id: string) => {
+    const newId = selectedLayer === id ? null : id;
+    dispatch(setSelectedLayerIdAction(newId, isMainTabSelected));
+  };
 
   useEffect(() => {
     dispatch(fetchLayers());
@@ -33,15 +55,15 @@ const LayerSelector: FunctionComponent<{}> = () => {
       <Tabs
         tabs={tabs}
         activeTabId={activeTabId}
-        onTabChanged={id => setActiveTabId(id)}
-      />
-      <LayerList
-        layers={layers}
-        selected={'layer1'}
-        onSelect={id =>
-          dispatch(setSelectedLayerIdAction(id, isMainTabSelected))
-        }
+        onTabChanged={id => onTabClick(id)}
       />
+      {isOpen && (
+        <LayerList
+          layers={layers}
+          selected={selectedLayer}
+          onSelect={id => onLayerClick(id)}
+        />
+      )}
     </div>
   );
 };

src/scripts/components/tab/tab.tsx

@@ -1,6 +1,6 @@
 import React, {FunctionComponent} from 'react';
+import cx from 'classnames';
 import styles from './tab.styl';
-import classNames from 'classnames';
 
 interface Props {
   id: string;
@@ -14,7 +14,7 @@ const Tab: FunctionComponent<Props> = ({
   onSelectTabId,
   children
 }) => {
-  const btnClass = classNames(styles.btn, {
+  const btnClass = cx(styles.btn, {
     [styles.btnInactive]: activeTabId !== id
   });
   return (

src/scripts/reducers/index.ts

@@ -12,7 +12,10 @@ export type Action = FetchLayersSuccessAction | SetSelectedLayerIdAction;
 
 const initialState: State = {
   layers: [],
-  selectedLayer: []
+  selectedLayer: {
+    main: null,
+    compare: null
+  }
 };
 
 function reducer(state: State = initialState, action: Action): State {

src/scripts/reducers/selected-layer-id.ts

@@ -1,22 +1,31 @@
 import {SET_SELECTED_LAYER_ID, LayerId} from '../actions/set-selected-layer';
 import {Action, State} from './index';
 
-export type SelectedLayersState = LayerId[];
+export interface SelectedLayersState {
+  main: LayerId | null;
+  compare: LayerId | null;
+}
+
+const initialState = {
+  main: null,
+  compare: null
+};
 
 function selectedLayerReducer(
-  state: SelectedLayersState = [],
+  state: SelectedLayersState = initialState,
   action: Action
 ): SelectedLayersState {
   switch (action.type) {
     case SET_SELECTED_LAYER_ID:
-      const newState = [...state];
-      newState[action.isPrimary ? 0 : 1] = action.layerId;
+      const newState = {...state};
+      const key = action.isPrimary ? 'main' : 'compare';
+      newState[key] = action.layerId;
       return newState;
     default:
       return state;
   }
 }
-export function selectedLayerIdSelector(state: State) {
+export function selectedLayerIdSelector(state: State): SelectedLayersState {
   return state.selectedLayer;
 }
 export default selectedLayerReducer;