Clean up Calculator/Standards servicees

apps/api/src/services/calculator.ts

@@ -4,28 +4,29 @@ import { db } from "../database/db";
 import { Value } from "@sinclair/typebox/value";
 import { log } from "../util";
 
-let calculator = new LevelCalculator(new Standards(DEFAULT_STANDARDS_DATASET));
-
 export class CalculatorService {
-    standards: StandardsSubService = new StandardsSubService();
+    private calculator: LevelCalculator = new LevelCalculator(new Standards(DEFAULT_STANDARDS_DATASET));
+    standards: StandardsService = new StandardsService(this.calculator);
 
     calculate(player: Player, activityPerformances: ActivityPerformance[]) {
         this.standards.refreshConfig({ onlyIfStale: true }).catch((err) => log.error({ err }, "failed to refresh standards config"));
-        return calculator.calculate(player, activityPerformances);
+        return this.calculator.calculate(player, activityPerformances);
     }
 }
 
-class StandardsSubService {
+class StandardsService {
     private static readonly CONFIG_REFRESH_INTERVAL_MS = 30_000;
     private cachedParametersStringified: string | null = null;
     private cachedDatasetId: string | null = null;
     private lastRefreshedAt = 0;
 
+    constructor(private calculator: LevelCalculator) { }
+
     async getSelectedConfig(opt: { skipCache?: boolean } = {}): Promise<StandardsParameters> {
-        if (!opt.skipCache) return calculator.standards.params;
+        if (!opt.skipCache) return this.calculator.standards.params;
 
         await this.refreshConfig();
-        return calculator.standards.params;
+        return this.calculator.standards.params;
     }
 
     async selectConfig(id: string) {
@@ -58,7 +59,7 @@ class StandardsSubService {
 
     async refreshConfig(opt: { onlyIfStale?: boolean } = {}) {
         if (opt.onlyIfStale)
-            if (Date.now() - this.lastRefreshedAt < StandardsSubService.CONFIG_REFRESH_INTERVAL_MS) return;
+            if (Date.now() - this.lastRefreshedAt < StandardsService.CONFIG_REFRESH_INTERVAL_MS) return;
 
         this.lastRefreshedAt = Date.now();
 
@@ -78,7 +79,7 @@ class StandardsSubService {
         const parametersStringified = JSON.stringify(config.parameters);
         if (parametersStringified === this.cachedParametersStringified && config.datasetId === this.cachedDatasetId) return;
 
-        calculator = new LevelCalculator(new Standards(config.dataset, config.parameters));
+        this.calculator.standards = new Standards(config.dataset, config.parameters);
         this.cachedParametersStringified = parametersStringified;
         this.cachedDatasetId = config.datasetId;
     }