feat: randomly generate daily modular weapon sales (#1199)

Re #685

Reviewed-on: #1199

package-lock.json

@@ -17,7 +17,7 @@
         "mongoose": "^8.11.0",
         "morgan": "^1.10.0",
         "typescript": ">=5.5 <5.6.0",
-        "warframe-public-export-plus": "^0.5.44",
+        "warframe-public-export-plus": "^0.5.46",
         "warframe-riven-info": "^0.1.2",
         "winston": "^3.17.0",
         "winston-daily-rotate-file": "^5.0.0"
@@ -4006,9 +4006,9 @@
       }
     },
     "node_modules/warframe-public-export-plus": {
-      "version": "0.5.44",
+      "version": "0.5.46",
-      "resolved": "https://registry.npmjs.org/warframe-public-export-plus/-/warframe-public-export-plus-0.5.44.tgz",
+      "resolved": "https://registry.npmjs.org/warframe-public-export-plus/-/warframe-public-export-plus-0.5.46.tgz",
-      "integrity": "sha512-0EH3CQBCuuELiLBL1brc/o6Qx8CK723TJF5o68VXc60ha93Juo6LQ+dV+QgzFvVQ5RZTjBLtKB4MP8qw3YHCUQ=="
+      "integrity": "sha512-bgxM8A+ccIydpTDRbISKmGt3XJb0rwX5cx04xGtqqhKX1Qs1OJM6NMGa3CKdqy6OiB7xXCPNLbi+KdqvJp9p9A=="
     },
     "node_modules/warframe-riven-info": {
       "version": "0.1.2",

package.json

@@ -22,7 +22,7 @@
     "mongoose": "^8.11.0",
     "morgan": "^1.10.0",
     "typescript": ">=5.5 <5.6.0",
-    "warframe-public-export-plus": "^0.5.44",
+    "warframe-public-export-plus": "^0.5.46",
     "warframe-riven-info": "^0.1.2",
     "winston": "^3.17.0",
     "winston-daily-rotate-file": "^5.0.0"

src/controllers/api/modularWeaponSaleController.ts

@@ -1,8 +1,123 @@
 import { RequestHandler } from "express";
-import modularWeaponSale from "@/static/fixed_responses/modularWeaponSale.json";
+import { ExportWeapons } from "warframe-public-export-plus";
+import { IMongoDate } from "@/src/types/commonTypes";
+import { toMongoDate } from "@/src/helpers/inventoryHelpers";
+import { CRng } from "@/src/services/rngService";
 
-const modularWeaponSaleController: RequestHandler = (_req, res) => {
+// op=SyncAll
-    res.json(modularWeaponSale);
+export const modularWeaponSaleController: RequestHandler = (_req, res) => {
+    const partTypeToParts: Record<string, string[]> = {};
+    for (const [uniqueName, data] of Object.entries(ExportWeapons)) {
+        if (data.partType) {
+            // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+            partTypeToParts[data.partType] ??= [];
+            partTypeToParts[data.partType].push(uniqueName);
+        }
+    }
+
+    const today: number = Math.trunc(Date.now() / 86400000);
+    const kitgunIsPrimary: boolean = (today & 1) != 0;
+    res.json({
+        SaleInfos: [
+            getModularWeaponSale(
+                partTypeToParts,
+                today,
+                "Ostron",
+                ["LWPT_HILT", "LWPT_BLADE", "LWPT_HILT_WEIGHT"],
+                () => "/Lotus/Weapons/Ostron/Melee/LotusModularWeapon"
+            ),
+            getModularWeaponSale(
+                partTypeToParts,
+                today,
+                "SolarisUnitedHoverboard",
+                ["LWPT_HB_DECK", "LWPT_HB_ENGINE", "LWPT_HB_FRONT", "LWPT_HB_JET"],
+                () => "/Lotus/Types/Vehicles/Hoverboard/HoverboardSuit"
+            ),
+            getModularWeaponSale(
+                partTypeToParts,
+                today,
+                "SolarisUnitedMoaPet",
+                ["LWPT_MOA_LEG", "LWPT_MOA_HEAD", "LWPT_MOA_ENGINE", "LWPT_MOA_PAYLOAD"],
+                () => "/Lotus/Types/Friendly/Pets/MoaPets/MoaPetPowerSuit"
+            ),
+            getModularWeaponSale(
+                partTypeToParts,
+                today,
+                "SolarisUnitedKitGun",
+                [
+                    kitgunIsPrimary ? "LWPT_GUN_PRIMARY_HANDLE" : "LWPT_GUN_SECONDARY_HANDLE",
+                    "LWPT_GUN_BARREL",
+                    "LWPT_GUN_CLIP"
+                ],
+                (parts: string[]) => {
+                    const barrel = parts[1];
+                    const gunType = ExportWeapons[barrel].gunType!;
+                    if (kitgunIsPrimary) {
+                        return {
+                            GT_RIFLE: "/Lotus/Weapons/SolarisUnited/Primary/LotusModularPrimary",
+                            GT_SHOTGUN: "/Lotus/Weapons/SolarisUnited/Primary/LotusModularPrimaryShotgun",
+                            GT_BEAM: "/Lotus/Weapons/SolarisUnited/Primary/LotusModularPrimaryBeam"
+                        }[gunType];
+                    } else {
+                        return {
+                            GT_RIFLE: "/Lotus/Weapons/SolarisUnited/Secondary/LotusModularSecondary",
+                            GT_SHOTGUN: "/Lotus/Weapons/SolarisUnited/Secondary/LotusModularSecondaryShotgun",
+                            GT_BEAM: "/Lotus/Weapons/SolarisUnited/Secondary/LotusModularSecondaryBeam"
+                        }[gunType];
+                    }
+                }
+            )
+        ]
+    });
 };
 
-export { modularWeaponSaleController };
+const priceFactor: Record<string, number> = {
+    Ostron: 0.9,
+    SolarisUnitedHoverboard: 0.85,
+    SolarisUnitedMoaPet: 0.95,
+    SolarisUnitedKitGun: 0.9
+};
+
+const getModularWeaponSale = (
+    partTypeToParts: Record<string, string[]>,
+    day: number,
+    name: string,
+    partTypes: string[],
+    getItemType: (parts: string[]) => string
+): IModularWeaponSaleInfo => {
+    const rng = new CRng(day);
+    const parts = partTypes.map(partType => rng.randomElement(partTypeToParts[partType]));
+    let partsCost = 0;
+    for (const part of parts) {
+        const meta = ExportWeapons[part];
+        if (!meta.premiumPrice) {
+            throw new Error(`no premium price for ${part}`);
+        }
+        partsCost += meta.premiumPrice;
+    }
+    return {
+        Name: name,
+        Expiry: toMongoDate(new Date((day + 1) * 86400000)),
+        Revision: day,
+        Weapons: [
+            {
+                ItemType: getItemType(parts),
+                PremiumPrice: Math.trunc(partsCost * priceFactor[name]),
+                ModularParts: parts
+            }
+        ]
+    };
+};
+
+interface IModularWeaponSaleInfo {
+    Name: string;
+    Expiry: IMongoDate;
+    Revision: number;
+    Weapons: IModularWeaponSaleItem[];
+}
+
+interface IModularWeaponSaleItem {
+    ItemType: string;
+    PremiumPrice: number;
+    ModularParts: string[];
+}

src/services/rngService.ts

@@ -69,3 +69,26 @@ export const getRandomWeightedRewardUc = <T extends { Rarity: TRarity }>(
     }
     return getRandomReward(resultPool);
 };
+
+export class CRng {
+    state: number;
+
+    constructor(seed: number = 1) {
+        this.state = seed;
+    }
+
+    random(): number {
+        this.state = (this.state * 1103515245 + 12345) & 0x7fffffff;
+        return (this.state & 0x3fffffff) / 0x3fffffff;
+    }
+
+    randomInt(min: number, max: number): number {
+        min = Math.ceil(min);
+        max = Math.floor(max);
+        return Math.floor(this.random() * (max - min + 1)) + min;
+    }
+
+    randomElement<T>(arr: T[]): T {
+        return arr[Math.floor(this.random() * arr.length)];
+    }
+}

static/fixed_responses/modularWeaponSale.json

@@ -1,86 +0,0 @@
-{
-  "SaleInfos": [
-    {
-      "Name": "Ostron",
-      "Expiry": {
-        "$date": {
-          "$numberLong": "9999999900000"
-        }
-      },
-      "Revision": 3453,
-      "Weapons": [
-        {
-          "ItemType": "/Lotus/Weapons/Ostron/Melee/LotusModularWeapon",
-          "PremiumPrice": 162,
-          "ModularParts": [
-            "/Lotus/Weapons/Ostron/Melee/ModularMelee01/Handle/HandleFive",
-            "/Lotus/Weapons/Ostron/Melee/ModularMelee01/Tip/TipFour",
-            "/Lotus/Weapons/Ostron/Melee/ModularMelee01/Balance/BalanceSpeedICritII"
-          ]
-        }
-      ]
-    },
-    {
-      "Name": "SolarisUnitedHoverboard",
-      "Expiry": {
-        "$date": {
-          "$numberLong": "9999999900000"
-        }
-      },
-      "Revision": 2058,
-      "Weapons": [
-        {
-          "ItemType": "/Lotus/Types/Vehicles/Hoverboard/HoverboardSuit",
-          "PremiumPrice": 51,
-          "ModularParts": [
-            "/Lotus/Types/Vehicles/Hoverboard/HoverboardParts/PartComponents/HoverboardSolarisA/HoverboardSolarisADeck",
-            "/Lotus/Types/Vehicles/Hoverboard/HoverboardParts/PartComponents/HoverboardCorpusA/HoverboardCorpusAEngine",
-            "/Lotus/Types/Vehicles/Hoverboard/HoverboardParts/PartComponents/HoverboardSolarisA/HoverboardSolarisAFront",
-            "/Lotus/Types/Vehicles/Hoverboard/HoverboardParts/PartComponents/HoverboardCorpusB/HoverboardCorpusBJet"
-          ]
-        }
-      ]
-    },
-    {
-      "Name": "SolarisUnitedMoaPet",
-      "Expiry": {
-        "$date": {
-          "$numberLong": "9999999900000"
-        }
-      },
-      "Revision": 2058,
-      "Weapons": [
-        {
-          "ItemType": "/Lotus/Types/Friendly/Pets/MoaPets/MoaPetPowerSuit",
-          "PremiumPrice": 180,
-          "ModularParts": [
-            "/Lotus/Types/Friendly/Pets/MoaPets/MoaPetParts/MoaPetLegB",
-            "/Lotus/Types/Friendly/Pets/MoaPets/MoaPetParts/MoaPetHeadPara",
-            "/Lotus/Types/Friendly/Pets/MoaPets/MoaPetParts/MoaPetEngineArcotek",
-            "/Lotus/Types/Friendly/Pets/MoaPets/MoaPetParts/MoaPetPayloadMunitron"
-          ]
-        }
-      ]
-    },
-    {
-      "Name": "SolarisUnitedKitGun",
-      "Expiry": {
-        "$date": {
-          "$numberLong": "9999999900000"
-        }
-      },
-      "Revision": 2058,
-      "Weapons": [
-        {
-          "ItemType": "/Lotus/Weapons/SolarisUnited/Secondary/LotusModularSecondary",
-          "PremiumPrice": 184,
-          "ModularParts": [
-            "/Lotus/Weapons/SolarisUnited/Secondary/SUModularSecondarySet1/Handle/SUModularSecondaryHandleCPart",
-            "/Lotus/Weapons/SolarisUnited/Secondary/SUModularSecondarySet1/Barrel/SUModularSecondaryBarrelBPart",
-            "/Lotus/Weapons/SolarisUnited/Secondary/SUModularSecondarySet1/Clip/SUModularStatIReloadIIClipPart"
-          ]
-        }
-      ]
-    }
-  ]
-}