Add logic for tracking the currently selected mech

Author: markerikson

src/app/reducers/rootReducer.js

@@ -4,12 +4,14 @@ import entitiesReducer from "./entitiesReducer";
 import tabReducer from "features/tabs/tabReducer";
 import unitInfoReducer from "features/unitInfo/unitInfoReducer";
 import pilotsReducer from "features/pilots/pilotsReducer";
+import mechsReducer from "features/mechs/mechsReducer";
 
 
 const rootReducer = combineReducers({
  entities : entitiesReducer,
  unitInfo : unitInfoReducer,
  pilots : pilotsReducer,
+ mechs : mechsReducer,
  tabs : tabReducer,
 });
 

src/features/mechs/mechSelectors.js

@@ -1,4 +1,4 @@
-
+import {createSelector} from "reselect";
 
 const WEIGHT_CLASSES = [
  {name : "Light", weights : [20, 25, 30, 35]},
@@ -11,3 +11,11 @@ export function getWeightClass(weight) {
  const weightClass = WEIGHT_CLASSES.find(wc => wc.weights.includes(weight)) || {name : "Unknown"};
  return weightClass.name;
 }
+
+
+const selectMechs = state => state.mechs;
+
+export const selectCurrentMech = createSelector(
+ selectMechs,
+ mechs => mechs.currentMech,
+);

src/features/mechs/mechsActions.js

@@ -0,0 +1,8 @@
+import {MECH_SELECT} from "./mechsConstants";
+
+export function selectMech(mechID) {
+ return {
+ type : MECH_SELECT,
+ payload : {currentMech : mechID},
+ };
+}

src/features/mechs/mechsConstants.js

@@ -0,0 +1 @@
+export const MECH_SELECT = "MECH_SELECT";

src/features/mechs/mechsReducer.js

@@ -0,0 +1,25 @@
+import {createReducer} from "common/utils/reducerUtils";
+
+import {MECH_SELECT} from "./mechsConstants";
+
+const initialState = {
+ currentMech : null
+};
+
+export function selectMech(state, payload) {
+ const prevSelectedMech = state.currentMech;
+ const newSelectedMech = payload.currentMech;
+
+ const isSameMech = prevSelectedMech === newSelectedMech;
+ 
+ return {
+ // Deselect entirely if it's a second click on the same mech,
+ // otherwise go ahead and select the one that was clicked
+ currentMech : isSameMech ? null : newSelectedMech,
+ };
+}
+
+
+export default createReducer(initialState, {
+ [MECH_SELECT] : selectMech,
+});