screens

package.json

@@ -43,6 +43,7 @@
     "histoire": "^0.15.9",
     "jsdom": "^21.1.1",
     "lodash": "^4.17.21",
+    "memoize-one": "^6.0.0",
     "redux": "^4.1.2",
     "remeda": "^1.9.1",
     "reselect": "^4.1.5",

src/lib/store/ship.ts

@@ -12,6 +12,7 @@ import { streamliningDux as streamlining } from "./ship/structure/streamlining";
 import { calcStreamliningReqs } from "./ship/structure/rules";
 import { cargoDux } from "./ship/structure/cargo";
 import { hullDux } from "./ship/structure/hull";
+import { screensDux, screensReqsReaction } from "./ship/structure/screens";
 
 const shipDux = new Updux({
   subduxes: {
@@ -22,6 +23,7 @@ const shipDux = new Updux({
         streamlining,
         cargo: cargoDux,
         hull: hullDux,
+        screens: screensDux,
       },
     }),
     propulsion: new Updux({
@@ -89,4 +91,6 @@ shipDux.addReaction((api) =>
   )
 );
 
+shipDux.addReaction(screensReqsReaction);
+
 export default shipDux;

src/lib/store/ship/structure/screens.ts

@@ -0,0 +1,49 @@
+import { reqs } from "$lib/shipDux/reqs";
+import Updux, { createPayloadAction } from "updux";
+import u from "@yanick/updeep-remeda";
+import { createSelector } from "reselect";
+
+const initialState = {
+  standard: 0,
+  advanced: 0,
+  reqs,
+};
+
+const setScreens = createPayloadAction<{ standard: number; advanced: number }>(
+  "setScreens"
+);
+const setScreensReqs = createPayloadAction("setScreensReqs");
+
+export const screensDux = new Updux({
+  initialState,
+  actions: {
+    setScreensReqs,
+    setScreens,
+  },
+  // reducers: {
+  //     setScreensReqs(state, action) {
+  //         state.reqs = action.payload;
+  //     },
+  // },
+});
+
+screensDux.addMutation(setScreens, (payload) => u(payload));
+screensDux.addMutation(setScreensReqs, (reqs) => u({ reqs }));
+
+export const screensReqsReaction = (api) =>
+  createSelector(
+    (ship) => ship.identification.reqs.mass,
+    (ship) => ship.structure.screens.standard,
+    (ship) => ship.structure.screens.advanced,
+    (...args) => api.dispatch.setScreensReqs(calcScreensReqs(...args))
+  );
+
+function calcScreensReqs(mass: number, standard: number, advanced: number) {
+  const standardMass = standard * Math.max(3, Math.ceil(0.05 * mass));
+  const advancedMass = advanced * Math.max(4, Math.ceil(0.075 * mass));
+
+  return {
+    mass: standardMass + advancedMass,
+    cost: 3 * standardMass + 4 * advancedMass,
+  };
+}