Add time-based loot drop weight multipliers (#568)

Resolves #485

Author: PatchRequest

src/service/lootData.ts

@@ -137,6 +137,9 @@ export const lootTemplateMap: Record<LootKindId, LootTemplate> = {
     [LootKind.DOENER]: {
         id: LootKind.DOENER,
         weight: 5,
+        timeBasedWeight: {
+            evening: 10,
+        },
         displayName: "Döner",
         titleText: "Einen Döner",
         dropDescription: "Bewahre ihn gut als Geldanlage auf!",
@@ -156,6 +159,9 @@ export const lootTemplateMap: Record<LootKindId, LootTemplate> = {
     [LootKind.KRANKSCHREIBUNG]: {
         id: LootKind.KRANKSCHREIBUNG,
         weight: 0.5,
+        timeBasedWeight: {
+            morning: 1,
+        },
         displayName: "Arbeitsunfähigkeitsbescheinigung",
         titleText: "Einen gelben Urlaubsschein",
         dropDescription: "Benutze ihn weise!",
@@ -222,6 +228,9 @@ export const lootTemplateMap: Record<LootKindId, LootTemplate> = {
     [LootKind.AYRAN]: {
         id: LootKind.AYRAN,
         weight: 1,
+        timeBasedWeight: {
+            evening: 2,
+        },
         displayName: "Ayran",
         titleText: "Einen Ayran",
         dropDescription: "Der gute von Müller",
@@ -242,6 +251,9 @@ export const lootTemplateMap: Record<LootKindId, LootTemplate> = {
     [LootKind.TRICHTER]: {
         id: LootKind.TRICHTER,
         weight: 1,
+        timeBasedWeight: {
+            evening: 2,
+        },
         displayName: "Trichter",
         titleText: "Einen Trichter",
         dropDescription: "Für die ganz großen Schlücke",
@@ -313,6 +325,9 @@ export const lootTemplateMap: Record<LootKindId, LootTemplate> = {
     [LootKind.OETTINGER]: {
         id: LootKind.OETTINGER,
         weight: 1,
+        timeBasedWeight: {
+            morning: 2,
+        },
         displayName: "Oettinger",
         titleText: "Ein warmes Oettinger",
         dropDescription: "Ja dann Prost ne!",
@@ -370,6 +385,9 @@ export const lootTemplateMap: Record<LootKindId, LootTemplate> = {
     [LootKind.SAHNE]: {
         id: LootKind.SAHNE,
         weight: 1,
+        timeBasedWeight: {
+            evening: 2,
+        },
         displayName: "Sprühsahne",
         titleText: "Sprühsahne",
         dropDescription: "Fürs Frühstück oder so",
@@ -414,6 +432,9 @@ export const lootTemplateMap: Record<LootKindId, LootTemplate> = {
     [LootKind.GAULOISES_BLAU]: {
         id: LootKind.GAULOISES_BLAU,
         weight: 1,
+        timeBasedWeight: {
+            evening: 2,
+        },
         displayName: "Gauloises Blau",
         titleText: "Eine Schachtel Gauloises Blau",
         dropDescription:
@@ -496,6 +517,9 @@ export const lootTemplateMap: Record<LootKindId, LootTemplate> = {
     [LootKind.KAFFEEMUEHLE]: {
         id: LootKind.KAFFEEMUEHLE,
         weight: 1,
+        timeBasedWeight: {
+            morning: 2,
+        },
         displayName: "Kaffeemühle",
         titleText: "Eine Kaffeemühle für 400€",
         dropDescription: "Kann Kaffee mühlen. Und das gut. Mit Gold.",

src/service/lootDrop.ts

@@ -22,9 +22,10 @@ import * as sentry from "@sentry/node";
 
 import type { BotContext } from "#context.ts";
 import type { Loot, LootId } from "#storage/db/model.ts";
-import type { LootTemplate } from "#storage/loot.ts";
+import type { LootTemplate, TimeBasedWeightConfig } from "#storage/loot.ts";
 import { randomBoolean, randomEntry, randomEntryWeighted } from "#service/random.ts";
 import * as timeUtils from "#utils/time.ts";
+import { zonedNow } from "#utils/dateUtils.ts";
 
 import * as lootService from "#service/loot.ts";
 import {
@@ -154,7 +155,12 @@ export async function postLootDrop(
         return;
     }
 
-    const defaultWeights = lootTemplates.map(t => t.weight);
+    const timeBasedWeightKey = getCurrentTimeBasedKey();
+
+    const defaultWeights = timeBasedWeightKey
+        ? lootTemplates.map(t => t.timeBasedWeight?.[timeBasedWeightKey] ?? t.weight)
+        : lootTemplates.map(t => t.weight);
+
     const { messages, weights } = await getDropWeightAdjustments(interaction.user, defaultWeights);
 
     const template = randomEntryWeighted(lootTemplates, weights);
@@ -358,6 +364,22 @@ export async function createDropTakenContent(
     };
 }
 
+function getCurrentTimeBasedKey(): keyof TimeBasedWeightConfig | undefined {
+    // Caution: using a ZonedDateTime and comparing the hour to the raw values breaks when daylight-saving-time happens (an hour can happen multiple times)
+    // We disregard these edge-cases, but keep it in mind
+    const hour = zonedNow().hour;
+
+    // :shibakek:
+    switch (true) {
+        case 6 <= hour && hour <= 12:
+            return "morning";
+        case 18 <= hour && hour <= 24:
+            return "evening";
+        default:
+            return undefined;
+    }
+}
+
 type AdjustmentResult = {
     messages: string[];
     weights: number[];

src/storage/loot.ts

@@ -32,9 +32,15 @@ export type LootUseCommandInteraction = ChatInputCommandInteraction & {
     channel: GuildTextBasedChannel;
 };
 
+export interface TimeBasedWeightConfig {
+    morning?: number;
+    evening?: number;
+}
+
 export interface LootTemplate {
     id: LootKindId;
     weight: number;
+    timeBasedWeight?: TimeBasedWeightConfig;
     displayName: string;
     titleText: string;
     dropDescription: string;