feat: handle acquisition of booster packs

package-lock.json

@@ -12,7 +12,7 @@
         "copyfiles": "^2.4.1",
         "express": "^5.0.0-beta.3",
         "mongoose": "^8.1.1",
-        "warframe-public-export-plus": "^0.4.0",
+        "warframe-public-export-plus": "^0.4.1",
         "warframe-riven-info": "^0.1.0",
         "winston": "^3.11.0",
         "winston-daily-rotate-file": "^4.7.1"
@@ -3669,9 +3669,9 @@
       }
     },
     "node_modules/warframe-public-export-plus": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/warframe-public-export-plus/-/warframe-public-export-plus-0.4.0.tgz",
-      "integrity": "sha512-8wOkh9dET4IHmHDSZ8g8RW0GlfEevHnBwEETAqy3jRhwssyF0TgQsOOpJVuhcPKedCYeudR92HJ3JoXoiTCr6A=="
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/warframe-public-export-plus/-/warframe-public-export-plus-0.4.1.tgz",
+      "integrity": "sha512-5SwnT/K/rMI0zJpdodzeEPlO/UnMlHiKv8NZGH647/5u52LZf8xfOpJHP4/yr/anjVVzDQJwY5K3CmbX0uMQdw=="
     },
     "node_modules/warframe-riven-info": {
       "version": "0.1.0",

package.json

@@ -16,7 +16,7 @@
     "copyfiles": "^2.4.1",
     "express": "^5.0.0-beta.3",
     "mongoose": "^8.1.1",
-    "warframe-public-export-plus": "^0.4.0",
+    "warframe-public-export-plus": "^0.4.1",
     "warframe-riven-info": "^0.1.0",
     "winston": "^3.11.0",
     "winston-daily-rotate-file": "^4.7.1"

src/services/inventoryService.ts

@@ -27,9 +27,16 @@ import {
 } from "../types/requestTypes";
 import { logger } from "@/src/utils/logger";
 import { getWeaponType, getExalted } from "@/src/services/itemDataService";
+import { getRandomWeightedReward } from "@/src/services/rngService";
 import { ISyndicateSacrifice, ISyndicateSacrificeResponse } from "../types/syndicateTypes";
 import { IEquipmentClient } from "../types/inventoryTypes/commonInventoryTypes";
-import { ExportCustoms, ExportFlavour, ExportRecipes, ExportResources } from "warframe-public-export-plus";
+import {
+    ExportBoosterPacks,
+    ExportCustoms,
+    ExportFlavour,
+    ExportRecipes,
+    ExportResources
+} from "warframe-public-export-plus";
 
 export const createInventory = async (
     accountOwnerId: Types.ObjectId,
@@ -146,6 +153,21 @@ export const addItem = async (
             }
         };
     }
+    if (typeName in ExportBoosterPacks) {
+        const pack = ExportBoosterPacks[typeName];
+        const InventoryChanges = {};
+        for (const weights of pack.rarityWeightsPerRoll) {
+            const result = getRandomWeightedReward(pack.components, weights);
+            if (result) {
+                logger.debug(`booster pack rolled`, result);
+                combineInventoryChanges(
+                    InventoryChanges,
+                    (await addItem(accountId, result.type, result.itemCount)).InventoryChanges
+                );
+            }
+        }
+        return { InventoryChanges };
+    }
 
     // Path-based duck typing
     switch (typeName.substr(1).split("/")[1]) {

src/services/rngService.ts

@@ -1,6 +1,8 @@
+import { TRarity } from "warframe-public-export-plus";
+
 export interface IRngResult {
-    type:        string;
-    itemCount:   number;
+    type: string;
+    itemCount: number;
     probability: number;
 }
 
@@ -19,3 +21,22 @@ export const getRandomReward = (pool: IRngResult[]): IRngResult | undefined => {
     }
     throw new Error("What the fuck?");
 };
+
+export const getRandomWeightedReward = (
+    pool: { Item: string; Rarity: TRarity }[],
+    weights: Record<TRarity, number>
+): IRngResult | undefined => {
+    const resultPool: IRngResult[] = [];
+    const rarityCounts: Record<TRarity, number> = { COMMON: 0, UNCOMMON: 0, RARE: 0, LEGENDARY: 0 };
+    for (const entry of pool) {
+        ++rarityCounts[entry.Rarity];
+    }
+    for (const entry of pool) {
+        resultPool.push({
+            type: entry.Item,
+            itemCount: 1,
+            probability: weights[entry.Rarity] / rarityCounts[entry.Rarity]
+        });
+    }
+    return getRandomReward(resultPool);
+};