Resolve #470

Author: holzmaster

src/service/cron.ts

@@ -16,7 +16,7 @@ import { checkBirthdays } from "@/service/birthday.js";
 import { handleFadingMessages } from "@/service/fadingMessage.js";
 import { checkExpiredShifts } from "@/service/lootRoles.js";
 import { getTrichterUnserEmbed } from "@/service/trichterUnser.js";
-import { degradeItems, exposeWithRadiation } from "@/service/lootDegradation.js";
+import { degradeItems, exposeWithRadiation, runHalfLife } from "@/service/lootDegradation.js";
 
 import * as poll from "@/commands/poll.js";
 import * as ehre from "@/storage/ehre.js";
@@ -47,6 +47,7 @@ export async function schedule(context: BotContext) {
     cron("0 20 * * FRI", () => getTrichterUnserEmbed(context));
     cron("0 * * * *", () => degradeItems(context));
     cron("26 18,19 * * *", () => exposeWithRadiation(context));
+    cron("15 18,19 * * *", () => runHalfLife(context));
 
     const loot = context.commandConfig.loot;
     if (loot.enabled) {

src/service/lootDegradation.ts

@@ -2,9 +2,10 @@ import type { BotContext } from "@/context.js";
 
 import * as time from "@/utils/time.js";
 import * as lootService from "@/service/loot.js";
-import { LootAttributeKindId, LootKindId } from "@/service/lootData.js";
+import { LootAttributeKindId, LootKindId, resolveLootTemplate } from "@/service/lootData.js";
 import log from "@log";
 import { randomEntry } from "@/service/random.js";
+import { Snowflake, userMention } from "discord.js";
 
 export async function degradeItems(_context: BotContext) {
     log.info("Degrading loot items");
@@ -81,3 +82,70 @@ export async function exposeWithRadiation(context: BotContext) {
         ],
     });
 }
+
+export async function runHalfLife(context: BotContext) {
+    log.info("Running half life");
+
+    const allWaste = await lootService.getLootsByKindId(LootKindId.RADIOACTIVE_WASTE);
+
+    // See: https://github.com/NullDev/CSZ-Bot/issues/470
+    // We don't do /2 straigt away, so we can roll this out more slowly initially. We can increase this to 2 once we got this number down in general
+    // Also, consider aligning this with the drop rate of radioactive waste, so we have that balanced
+    const targetWasteCount = Math.ceil(allWaste.length / 1.1);
+
+    if (targetWasteCount >= allWaste.length) {
+        return;
+    }
+
+    const wasteToRemove = allWaste.sort((a, b) => Math.random()).slice(targetWasteCount);
+    if (wasteToRemove.length === 0) {
+        return;
+    }
+
+    const leadTemplate = resolveLootTemplate(LootKindId.BLEI);
+    if (!leadTemplate) {
+        log.error("Could not resolve loot template for lead.");
+        return;
+    }
+
+    const replacedStats = new Map<Snowflake, number>();
+
+    for (const l of wasteToRemove) {
+        const replaced = await lootService.replaceLoot(
+            l.id,
+            {
+                displayName: leadTemplate.displayName,
+                description: leadTemplate.infoDescription ?? leadTemplate.dropDescription,
+                lootKindId: leadTemplate.id,
+                usedImage: leadTemplate.asset,
+                winnerId: l.winnerId,
+                claimedAt: l.claimedAt,
+                guildId: l.guildId,
+                channelId: l.channelId,
+                messageId: l.messageId,
+                origin: "replacement",
+            },
+            true,
+        );
+
+        replacedStats.set(replaced.winnerId, replacedStats.getOrInsert(replaced.winnerId, 0) + 1);
+    }
+
+    const listFormatter = new Intl.ListFormat("de", {
+        style: "short",
+        type: "conjunction",
+    });
+
+    const decayStats = replacedStats
+        .entries()
+        .toArray()
+        .map(([user, count]) => `${count}x von <@${user}>`);
+
+    await context.textChannels.hauptchat.send({
+        embeds: [
+            {
+                description: `:radioactive: Der Müll ${decayStats.length === 1 ? "eines Users" : "einiger User"} ist zu einem Stück Blei zerfallen: ${listFormatter.format(decayStats)}. :radioactive:`,
+            },
+        ],
+    });
+}