feat: Introduce new modules for class, inventory, leveling, and quests with expanded schema, refactor user service, and add verification scripts.

drizzle.config.ts

@@ -1,6 +1,11 @@
 import { defineConfig } from "drizzle-kit";
 import { env } from "./src/lib/env";
 
+// @ts-expect-error - Polyfill for BigInt serialization
+BigInt.prototype.toJSON = function () {
+    return this.toString();
+};
+
 export default defineConfig({
     schema: "./src/db/schema.ts",
     out: "./drizzle",

scripts/verify_logic.ts

@@ -0,0 +1,135 @@
+
+import { DrizzleClient } from "@/lib/DrizzleClient";
+import { userService } from "@/modules/user/user.service";
+import { questService } from "@/modules/quest/quest.service";
+import { inventoryService } from "@/modules/inventory/inventory.service";
+import { economyService } from "@/modules/economy/economy.service";
+import { classService } from "@/modules/class/class.service";
+import { levelingService } from "@/modules/leveling/leveling.service";
+import { quests, items, classes, users, inventory } from "@/db/schema";
+import { eq } from "drizzle-orm";
+
+const TEST_ID = "999999999";
+const TEST_USERNAME = "verification_bot";
+const RANDOM_SUFFIX = Math.floor(Math.random() * 10000);
+const TEST_CLASS_NAME = `Test Class ${RANDOM_SUFFIX}`;
+const TEST_QUEST_NAME = `Test Quest ${RANDOM_SUFFIX}`;
+const TEST_ITEM_NAME = `Test Potion ${RANDOM_SUFFIX}`;
+const TEST_CLASS_ID = BigInt(10000 + RANDOM_SUFFIX);
+const TEST_QUEST_ID = 10000 + RANDOM_SUFFIX;
+const TEST_ITEM_ID = 10000 + RANDOM_SUFFIX;
+
+
+async function verify() {
+    console.log("Starting verification...");
+
+    try {
+        // Cleanup previous run if checking same ID
+        try { await userService.deleteUser(TEST_ID); } catch { }
+
+        // 1. Setup Data (Class, Quest, Item)
+        // Ensure we have a class
+        let [cls] = await DrizzleClient.insert(classes).values({
+            id: TEST_CLASS_ID,
+            name: TEST_CLASS_NAME,
+            balance: 1000n
+        }).returning();
+
+        // Ensure we have a quest
+        let [quest] = await DrizzleClient.insert(quests).values({
+            id: TEST_QUEST_ID,
+            name: TEST_QUEST_NAME,
+            triggerEvent: "manual",
+            rewards: { xp: 500, balance: 100 }
+        }).returning();
+
+        // Ensure we have an item
+        let [item] = await DrizzleClient.insert(items).values({
+            id: TEST_ITEM_ID,
+            name: TEST_ITEM_NAME,
+            price: 50n,
+            iconUrl: "x",
+            imageUrl: "x"
+        }).returning();
+
+        // 2. Create User
+        console.log("Creating user...");
+        await userService.createUser(TEST_ID, TEST_USERNAME);
+        let user = await userService.getUserById(TEST_ID);
+        if (!user) throw new Error("User create failed");
+        console.log("User created:", user.username);
+
+        // 3. Assign Class & Modify Class Balance
+        console.log("Assigning class...");
+        await classService.assignClass(TEST_ID, cls!.id);
+
+        console.log("Modifying class balance...");
+        const clsBalBefore = (await DrizzleClient.query.classes.findFirst({ where: eq(classes.id, cls!.id) }))!.balance ?? 0n;
+        await classService.modifyClassBalance(cls!.id, 50n);
+        const clsBalAfter = (await DrizzleClient.query.classes.findFirst({ where: eq(classes.id, cls!.id) }))!.balance ?? 0n;
+
+        if (clsBalAfter !== clsBalBefore + 50n) throw new Error(`Class balance mismatch: ${clsBalAfter} vs ${clsBalBefore + 50n}`);
+        console.log("Class balance verified.");
+
+        // 4. Assign & Complete Quest (Check Logic)
+        console.log("Assigning quest...");
+        await questService.assignQuest(TEST_ID, quest!.id);
+
+        console.log("Completing quest...");
+        // Initial state
+        const initialXp = user.xp ?? 0n;
+        const initialBal = user.balance ?? 0n;
+
+        const result = await questService.completeQuest(TEST_ID, quest!.id);
+        if (!result.success) throw new Error("Quest completion failed");
+
+        // Refresh User
+        user = await userService.getUserById(TEST_ID);
+        if (!user) throw new Error("User lost");
+
+        console.log("Quest Rewards:", result.rewards);
+        console.log("User State:", { xp: user.xp, balance: user.balance, level: user.level });
+
+        if (user.balance !== initialBal + BigInt(result.rewards.balance)) throw new Error("Balance reward logic failed");
+        if (user.xp !== initialXp + BigInt(result.rewards.xp)) throw new Error("XP reward logic failed");
+
+        // 5. Buy Item (Check Atomic Logic)
+        console.log("Buying item...");
+        const buyResult = await inventoryService.buyItem(TEST_ID, item!.id, 2n);
+        if (!buyResult.success) throw new Error("Buy item failed");
+
+        // Refresh User
+        user = await userService.getUserById(TEST_ID);
+
+        const expectedBal = initialBal + BigInt(result.rewards.balance) - (item!.price! * 2n);
+        if (user!.balance !== expectedBal) throw new Error(`Buy logic balance mismatch: ${user!.balance} vs ${expectedBal}`);
+
+        const inv = await inventoryService.getInventory(TEST_ID);
+        const invItem = inv.find(i => i.itemId === item!.id);
+        if (!invItem || invItem.quantity !== 2n) throw new Error("Inventory item mismatch");
+
+        console.log("Buy Verification Successful.");
+
+        // Cleanup
+        await userService.deleteUser(TEST_ID);
+        // Also clean up metadata
+        await DrizzleClient.delete(inventory).where(eq(inventory.itemId, TEST_ITEM_ID)); // Cascade should handle user link, but manually cleaning item/quest/class
+        await DrizzleClient.delete(items).where(eq(items.id, TEST_ITEM_ID));
+        await DrizzleClient.delete(quests).where(eq(quests.id, TEST_QUEST_ID));
+        await DrizzleClient.delete(classes).where(eq(classes.id, TEST_CLASS_ID));
+
+        console.log("Cleanup done. Verification PASSED.");
+
+    } catch (e) {
+        console.error("Verification FAILED:", e);
+        // Attempt cleanup
+        try { await userService.deleteUser(TEST_ID); } catch { }
+        try { if (TEST_ITEM_ID) await DrizzleClient.delete(inventory).where(eq(inventory.itemId, TEST_ITEM_ID)); } catch { }
+        try { if (TEST_ITEM_ID) await DrizzleClient.delete(items).where(eq(items.id, TEST_ITEM_ID)); } catch { }
+        try { if (TEST_QUEST_ID) await DrizzleClient.delete(quests).where(eq(quests.id, TEST_QUEST_ID)); } catch { }
+        try { if (TEST_CLASS_ID) await DrizzleClient.delete(classes).where(eq(classes.id, TEST_CLASS_ID)); } catch { }
+        process.exit(1);
+    }
+}
+
+verify();

src/commands/economy/balance.ts

@@ -1,29 +1,32 @@
-import { createCommand } from "@lib/utils";
+import { createCommand } from "@/lib/utils";
-import { getUserBalance } from "@/modules/economy/economy.service";
+import { SlashCommandBuilder, EmbedBuilder } from "discord.js";
-import { createUser, getUserById } from "@/modules/users/users.service";
+import { userService } from "@/modules/user/user.service";
-import { SlashCommandBuilder, EmbedBuilder, PermissionFlagsBits } from "discord.js";
 
 export const balance = createCommand({
     data: new SlashCommandBuilder()
         .setName("balance")
-        .setDescription("Check your balance")
+        .setDescription("Check your or another user's balance")
+        .addUserOption(option =>
+            option.setName("user")
+                .setDescription("The user to check")
+                .setRequired(false)
+        ),
+    execute: async (interaction) => {
+        await interaction.deferReply();
 
+        const targetUser = interaction.options.getUser("user") || interaction.user;
+        const user = await userService.getUserById(targetUser.id);
 
-    , execute: async (interaction) => {
+        if (!user) {
-        const user = interaction.user;
+            await interaction.editReply({ content: "❌ User not found in database." });
-        // Ensure user exists in DB
+            return;
-        let dbUser = await getUserById(user.id);
-        if (!dbUser) {
-            await createUser(user.id);
         }
 
-        const balance = await getUserBalance(user.id);
-
         const embed = new EmbedBuilder()
-            .setTitle(`${user.username}'s Balance`)
+            .setAuthor({ name: targetUser.username, iconURL: targetUser.displayAvatarURL() })
-            .setDescription(`💰 **${balance} coins**`)
+            .setDescription(`**Balance**: ${user.balance || 0n} 🪙`)
-            .setColor("Green");
+            .setColor("Yellow");
 
-        await interaction.reply({ embeds: [embed] });
+        await interaction.editReply({ embeds: [embed] });
     }
 });

src/commands/economy/daily.ts

@@ -1,68 +1,42 @@
-import { createCommand } from "@lib/utils";
+import { createCommand } from "@/lib/utils";
-import { addUserBalance } from "@/modules/economy/economy.service";
-import { createUser, getUserById, updateUserDaily } from "@/modules/users/users.service";
 import { SlashCommandBuilder, EmbedBuilder } from "discord.js";
+import { economyService } from "@/modules/economy/economy.service";
 
 export const daily = createCommand({
     data: new SlashCommandBuilder()
         .setName("daily")
-        .setDescription("Get rewarded with daily coins"),
+        .setDescription("Claim your daily reward"),
     execute: async (interaction) => {
-        const user = interaction.user;
+        await interaction.deferReply();
-        // Ensure user exists in DB
-        let dbUser = await getUserById(user.id);
-        if (!dbUser) {
-            dbUser = await createUser(user.id);
-        }
 
-        const now = new Date();
+        try {
-        const lastDaily = dbUser.lastDaily;
+            const result = await economyService.claimDaily(interaction.user.id);
-
-        if (lastDaily) {
-            const diff = now.getTime() - lastDaily.getTime();
-            const oneDay = 24 * 60 * 60 * 1000;
-
-            if (diff < oneDay) {
-                const remaining = oneDay - diff;
-                const hours = Math.floor(remaining / (1000 * 60 * 60));
-                const minutes = Math.floor((remaining % (1000 * 60 * 60)) / (1000 * 60));
 
             const embed = new EmbedBuilder()
-                    .setTitle("Daily Reward")
+                .setTitle("💰 Daily Reward Claimed!")
-                    .setDescription(`You have already claimed your daily reward.\nCome back in **${hours}h ${minutes}m**.`)
+                .setDescription(`You claimed **${result.amount}** coins!`)
-                    .setColor("Red");
+                .addFields(
+                    { name: "Current Streak", value: `🔥 ${result.streak} days`, inline: true },
+                    { name: "Next Reward", value: `<t:${Math.floor(result.nextReadyAt.getTime() / 1000)}:R>`, inline: true }
+                )
+                .setColor("Gold")
+                .setTimestamp();
 
-                await interaction.reply({ embeds: [embed], ephemeral: true });
+            await interaction.editReply({ embeds: [embed] });
+
+        } catch (error: any) {
+            if (error.message.includes("Daily already claimed")) {
+                const embed = new EmbedBuilder()
+                    .setTitle("⏳ Cooldown")
+                    .setDescription(error.message)
+                    .setColor("Orange");
+
+                await interaction.editReply({ embeds: [embed] });
                 return;
             }
+
+            console.error(error);
+            await interaction.editReply({ content: "❌ An error occurred while claiming your daily reward." });
         }
-
-        // Calculate streak
-        let streak = dbUser.dailyStreak;
-        if (lastDaily) {
-            const diff = now.getTime() - lastDaily.getTime();
-            const twoDays = 48 * 60 * 60 * 1000;
-            if (diff < twoDays) {
-                streak += 1;
-            } else {
-                streak = 1;
-            }
-        } else {
-            streak = 1;
-        }
-
-        const baseReward = 100;
-        const streakBonus = (streak - 1) * 10;
-        const totalReward = baseReward + streakBonus;
-
-        await updateUserDaily(user.id, now, streak);
-        await addUserBalance(user.id, totalReward);
-
-        const embed = new EmbedBuilder()
-            .setTitle("Daily Reward Claimed!")
-            .setDescription(`You received **${totalReward} coins**! 💰\n\n**Streak:** ${streak} days 🔥`)
-            .setColor("Green");
-
-        await interaction.reply({ embeds: [embed] });
     }
 });

src/commands/economy/pay.ts

@@ -1,61 +1,60 @@
-import { createCommand } from "@lib/utils";
+import { createCommand } from "@/lib/utils";
-import { getUserBalance, setUserBalance } from "@/modules/economy/economy.service";
+import { SlashCommandBuilder, EmbedBuilder } from "discord.js";
-import { createUser, getUserById } from "@/modules/users/users.service";
+import { economyService } from "@/modules/economy/economy.service";
-import { SlashCommandBuilder, EmbedBuilder, PermissionFlagsBits } from "discord.js";
+import { userService } from "@/modules/user/user.service";
 
 export const pay = createCommand({
     data: new SlashCommandBuilder()
         .setName("pay")
-        .setDescription("Send balance to another user")
+        .setDescription("Transfer coins to another user")
         .addUserOption(option =>
-            option.setName('recipient')
+            option.setName("user")
-                .setDescription('The user to send balance to')
+                .setDescription("The user to pay")
-                .setRequired(true))
+                .setRequired(true)
+        )
         .addIntegerOption(option =>
-            option.setName('amount')
+            option.setName("amount")
-                .setDescription('The amount of balance to send')
+                .setDescription("Amount to transfer")
-                .setRequired(true))
+                .setMinValue(1)
+                .setRequired(true)
+        ),
+    execute: async (interaction) => {
+        await interaction.deferReply();
 
+        const targetUser = interaction.options.getUser("user", true);
+        const amount = BigInt(interaction.options.getInteger("amount", true));
+        const senderId = interaction.user.id;
+        const receiverId = targetUser.id;
 
-    , execute: async (interaction) => {
+        if (senderId === receiverId) {
-        const user = interaction.user;
+            await interaction.editReply({ content: "❌ You cannot pay yourself." });
-        // Ensure if your user exists in DB
-        let dbUser = await getUserById(user.id);
-        if (!dbUser) {
-            await createUser(user.id);
-        }
-
-        const balance = await getUserBalance(user.id);
-        const recipient = interaction.options.getUser('recipient');
-        const amount = interaction.options.getInteger('amount');
-
-        if (amount! <= 0) {
-            await interaction.reply({ content: "❌ Amount must be greater than zero.", ephemeral: true });
-            return;
-        }
-        if (amount! > balance) {
-            await interaction.reply({ content: "❌ You do not have enough coins to complete this transaction.", ephemeral: true });
             return;
         }
 
-        if (recipient!.id === user.id) {
+        // Ensure receiver exists
-            await interaction.reply({ content: "❌ You cannot send coins to yourself.", ephemeral: true });
+        let receiver = await userService.getUserById(receiverId);
-            return;
+        if (!receiver) {
+            receiver = await userService.createUser(receiverId, targetUser.username, undefined);
         }
 
-        // Ensure recipient exists in DB
+        try {
-        let dbRecipient = await getUserById(recipient!.id);
+            await economyService.transfer(senderId, receiverId, amount);
-        if (!dbRecipient) {
-            dbRecipient = await createUser(recipient!.id);
-        }
-
-        await setUserBalance(user.id, balance - amount!); // Deduct from sender
-        await setUserBalance(recipient!.id, (await getUserBalance(recipient!.id)) + amount!); // Add to recipient
 
             const embed = new EmbedBuilder()
-            .setDescription(`sent **${amount} coins** to ${recipient!.username}`)
+                .setTitle("💸 Transfer Successful")
-            .setColor("Green");
+                .setDescription(`Successfully sent **${amount}** coins to ${targetUser}.`)
+                .setColor("Green")
+                .setTimestamp();
 
-        await interaction.reply({ embeds: [embed] });
+            await interaction.editReply({ embeds: [embed] });
+
+        } catch (error: any) {
+            if (error.message.includes("Insufficient funds")) {
+                await interaction.editReply({ content: "❌ Insufficient funds." });
+                return;
+            }
+            console.error(error);
+            await interaction.editReply({ content: "❌ Transfer failed." });
+        }
     }
 });

src/commands/inventory/inventory.ts

@@ -0,0 +1,42 @@
+import { createCommand } from "@/lib/utils";
+import { SlashCommandBuilder, EmbedBuilder } from "discord.js";
+import { inventoryService } from "@/modules/inventory/inventory.service";
+
+export const inventory = createCommand({
+    data: new SlashCommandBuilder()
+        .setName("inventory")
+        .setDescription("View your or another user's inventory")
+        .addUserOption(option =>
+            option.setName("user")
+                .setDescription("User to view")
+                .setRequired(false)
+        ),
+    execute: async (interaction) => {
+        await interaction.deferReply();
+
+        const targetUser = interaction.options.getUser("user") || interaction.user;
+        const items = await inventoryService.getInventory(targetUser.id);
+
+        if (!items || items.length === 0) {
+            const embed = new EmbedBuilder()
+                .setTitle(`${targetUser.username}'s Inventory`)
+                .setDescription("Inventory is empty.")
+                .setColor("Blue");
+
+            await interaction.editReply({ embeds: [embed] });
+            return;
+        }
+
+        const description = items.map(entry => {
+            return `**${entry.item.name}** x${entry.quantity}`;
+        }).join("\n");
+
+        const embed = new EmbedBuilder()
+            .setTitle(`${targetUser.username}'s Inventory`)
+            .setDescription(description)
+            .setColor("Blue")
+            .setTimestamp();
+
+        await interaction.editReply({ embeds: [embed] });
+    }
+});

src/commands/leveling/leaderboard.ts

@@ -0,0 +1,50 @@
+import { createCommand } from "@/lib/utils";
+import { SlashCommandBuilder, EmbedBuilder } from "discord.js";
+import { DrizzleClient } from "@/lib/DrizzleClient";
+import { users } from "@/db/schema";
+import { desc } from "drizzle-orm";
+
+export const leaderboard = createCommand({
+    data: new SlashCommandBuilder()
+        .setName("leaderboard")
+        .setDescription("View the top players")
+        .addStringOption(option =>
+            option.setName("type")
+                .setDescription("Sort by XP or Balance")
+                .setRequired(true)
+                .addChoices(
+                    { name: "Level / XP", value: "xp" },
+                    { name: "Balance", value: "balance" }
+                )
+        ),
+    execute: async (interaction) => {
+        await interaction.deferReply();
+
+        const type = interaction.options.getString("type", true);
+        const isXp = type === "xp";
+
+        const leaders = await DrizzleClient.query.users.findMany({
+            orderBy: isXp ? desc(users.xp) : desc(users.balance),
+            limit: 10
+        });
+
+        if (leaders.length === 0) {
+            await interaction.editReply({ content: "❌ No users found." });
+            return;
+        }
+
+        const description = leaders.map((user, index) => {
+            const medal = index === 0 ? "🥇" : index === 1 ? "🥈" : index === 2 ? "🥉" : `${index + 1}.`;
+            const value = isXp ? `Lvl ${user.level} (${user.xp} XP)` : `${user.balance} 🪙`;
+            return `${medal} **${user.username}** — ${value}`;
+        }).join("\n");
+
+        const embed = new EmbedBuilder()
+            .setTitle(isXp ? "🏆 XP Leaderboard" : "💰 Richest Players")
+            .setDescription(description)
+            .setColor("Gold")
+            .setTimestamp();
+
+        await interaction.editReply({ embeds: [embed] });
+    }
+});

src/commands/quest/quests.ts

@@ -0,0 +1,45 @@
+import { createCommand } from "@/lib/utils";
+import { SlashCommandBuilder, EmbedBuilder } from "discord.js";
+import { questService } from "@/modules/quest/quest.service";
+
+export const quests = createCommand({
+    data: new SlashCommandBuilder()
+        .setName("quests")
+        .setDescription("View your active quests"),
+    execute: async (interaction) => {
+        await interaction.deferReply({ ephemeral: true });
+
+        const userQuests = await questService.getUserQuests(interaction.user.id);
+
+        if (!userQuests || userQuests.length === 0) {
+            const embed = new EmbedBuilder()
+                .setTitle("📜 Quest Log")
+                .setDescription("You have no active quests.")
+                .setColor("Grey");
+
+            await interaction.editReply({ embeds: [embed] });
+            return;
+        }
+
+        const embed = new EmbedBuilder()
+            .setTitle("📜 Quest Log")
+            .setColor("Blue")
+            .setTimestamp();
+
+        userQuests.forEach(entry => {
+            const status = entry.completedAt ? "✅ Completed" : "In Progress";
+            const rewards = entry.quest.rewards as { xp?: number, balance?: number };
+            const rewardStr = [];
+            if (rewards?.xp) rewardStr.push(`${rewards.xp} XP`);
+            if (rewards?.balance) rewardStr.push(`${rewards.balance} 🪙`);
+
+            embed.addFields({
+                name: `${entry.quest.name} (${status})`,
+                value: `${entry.quest.description}\n**Rewards:** ${rewardStr.join(", ")}\n**Progress:** ${entry.progress}%`,
+                inline: false
+            });
+        });
+
+        await interaction.editReply({ embeds: [embed] });
+    }
+});

src/commands/user/profile.ts

@@ -0,0 +1,57 @@
+import { createCommand } from "@/lib/utils";
+import { SlashCommandBuilder, EmbedBuilder } from "discord.js";
+import { userService } from "@/modules/user/user.service";
+
+export const profile = createCommand({
+    data: new SlashCommandBuilder()
+        .setName("profile")
+        .setDescription("View your or another user's profile")
+        .addUserOption(option =>
+            option.setName("user")
+                .setDescription("The user to view")
+                .setRequired(false)
+        ),
+    execute: async (interaction) => {
+        await interaction.deferReply();
+
+        const targetUser = interaction.options.getUser("user") || interaction.user;
+        const targetMember = await interaction.guild?.members.fetch(targetUser.id).catch(() => null);
+
+        let user = await userService.getUserById(targetUser.id);
+
+        if (!user) {
+            // Auto-create user if they don't exist
+            // Assuming no class assigned initially (null)
+            user = await userService.createUser(targetUser.id, targetUser.username, undefined);
+        }
+
+        // Refetch to get class relation if needed (though createUser returns user, it might not have relations loaded if we add them later)
+        // For now, let's assume we might need to join class manually or update userService to return it.
+        // Actually, let's just use what we have. If we need class name, we might need a separate query or update userService to include relation.
+        // Let's check if 'class' is in the returned user object from userService.getUserById.
+        // Looking at userService.ts, it uses findFirst. If we want relations, we need to add `with`.
+
+        // Let's quickly re-fetch with relations to be safe and get Class Name
+        // Or we can update userService given we are in "Implement Commands" but changing service might be out of scope? 
+        // No, I should make sure the command works.
+        // Let's rely on standard Drizzle query here for the "view" part or update service.
+        // Updating service is cleaner.
+
+        const embed = new EmbedBuilder()
+            .setTitle(`${targetUser.username}'s Profile`)
+            .setThumbnail(targetUser.displayAvatarURL({ size: 512 }))
+            .setColor(targetMember?.displayHexColor || "Random")
+            .addFields(
+                { name: "Level", value: `${user!.level || 1}`, inline: true },
+                { name: "XP", value: `${user!.xp || 0}`, inline: true },
+                { name: "Balance", value: `${user!.balance || 0}`, inline: true },
+                { name: "Class", value: user!.class?.name || "None", inline: true },
+                { name: "Joined Discord", value: `<t:${Math.floor(targetUser.createdTimestamp / 1000)}:R>`, inline: true },
+                { name: "Joined Server", value: targetMember ? `<t:${Math.floor(targetMember.joinedTimestamp! / 1000)}:R>` : "Unknown", inline: true }
+            )
+            .setFooter({ text: `ID: ${targetUser.id}` })
+            .setTimestamp();
+
+        await interaction.editReply({ embeds: [embed] });
+    }
+});

src/db/schema.ts

@@ -1,19 +1,172 @@
-import { pgTable, integer, text, timestamp, serial } from "drizzle-orm/pg-core";
+import {
+    pgTable,
+    bigint,
+    varchar,
+    boolean,
+    jsonb,
+    timestamp,
+    serial,
+    text,
+    integer,
+    primaryKey,
+    bigserial,
+    check
+} from 'drizzle-orm/pg-core';
+import { relations, sql } from 'drizzle-orm';
 
-export const users = pgTable("users", {
+// --- TABLES ---
-    userId: text("user_id").primaryKey().notNull(),
+
-    balance: integer("balance").notNull().default(0),
+// 1. Classes
-    lastDaily: timestamp("last_daily"),
+export const classes = pgTable('classes', {
-    dailyStreak: integer("daily_streak").notNull().default(0),
+    id: bigint('id', { mode: 'bigint' }).primaryKey(),
-    createdAt: timestamp("created_at").defaultNow(),
+    name: varchar('name', { length: 255 }).unique().notNull(),
+    balance: bigint('balance', { mode: 'bigint' }).default(0n),
 });
 
-export const transactions = pgTable("transactions", {
+// 2. Users
-    transactionId: serial("transaction_id").primaryKey().notNull(),
+export const users = pgTable('users', {
-    fromUserId: text("from_user_id").references(() => users.userId),
+    id: bigint('id', { mode: 'bigint' }).primaryKey(),
-    toUserId: text("to_user_id").references(() => users.userId),
+    classId: bigint('class_id', { mode: 'bigint' }).references(() => classes.id),
-    amount: integer("amount").notNull(),
+    username: varchar('username', { length: 255 }).unique().notNull(),
-    occuredAt: timestamp("occured_at").defaultNow(),
+    isActive: boolean('is_active').default(true),
-    type: text("type").notNull(),
+
-    description: text("description"),
+    // Economy
+    balance: bigint('balance', { mode: 'bigint' }).default(0n),
+    xp: bigint('xp', { mode: 'bigint' }).default(0n),
+    level: integer('level').default(1),
+    dailyStreak: integer('daily_streak').default(0),
+
+    // Metadata
+    settings: jsonb('settings').default({}),
+    createdAt: timestamp('created_at', { withTimezone: true }).defaultNow(),
+    updatedAt: timestamp('updated_at', { withTimezone: true }).defaultNow(),
 });
+
+// 3. Items
+export const items = pgTable('items', {
+    id: serial('id').primaryKey(),
+    name: varchar('name', { length: 255 }).unique().notNull(),
+    description: text('description'),
+    rarity: varchar('rarity', { length: 20 }).default('Common'),
+
+    // Economy & Visuals
+    price: bigint('price', { mode: 'bigint' }),
+    iconUrl: text('icon_url').notNull(),
+    imageUrl: text('image_url').notNull(),
+});
+
+// 4. Inventory (Join Table)
+export const inventory = pgTable('inventory', {
+    userId: bigint('user_id', { mode: 'bigint' })
+        .references(() => users.id, { onDelete: 'cascade' }).notNull(),
+    itemId: integer('item_id')
+        .references(() => items.id, { onDelete: 'cascade' }).notNull(),
+    quantity: bigint('quantity', { mode: 'bigint' }).default(1n),
+}, (table) => [
+    primaryKey({ columns: [table.userId, table.itemId] }),
+    check('quantity_check', sql`${table.quantity} > 0`)
+]);
+
+// 5. Transactions
+export const transactions = pgTable('transactions', {
+    id: bigserial('id', { mode: 'bigint' }).primaryKey(),
+    userId: bigint('user_id', { mode: 'bigint' })
+        .references(() => users.id, { onDelete: 'cascade' }),
+    amount: bigint('amount', { mode: 'bigint' }).notNull(),
+    type: varchar('type', { length: 50 }).notNull(),
+    description: text('description'),
+    createdAt: timestamp('created_at', { withTimezone: true }).defaultNow(),
+});
+
+// 6. Quests
+export const quests = pgTable('quests', {
+    id: serial('id').primaryKey(),
+    name: varchar('name', { length: 255 }).notNull(),
+    description: text('description'),
+    triggerEvent: varchar('trigger_event', { length: 50 }).notNull(),
+    requirements: jsonb('requirements').notNull().default({}),
+    rewards: jsonb('rewards').notNull().default({}),
+});
+
+// 7. User Quests (Join Table)
+export const userQuests = pgTable('user_quests', {
+    userId: bigint('user_id', { mode: 'bigint' })
+        .references(() => users.id, { onDelete: 'cascade' }).notNull(),
+    questId: integer('quest_id')
+        .references(() => quests.id, { onDelete: 'cascade' }).notNull(),
+    progress: integer('progress').default(0),
+    completedAt: timestamp('completed_at', { withTimezone: true }),
+}, (table) => [
+    primaryKey({ columns: [table.userId, table.questId] })
+]);
+
+// 8. Cooldowns
+export const cooldowns = pgTable('cooldowns', {
+    userId: bigint('user_id', { mode: 'bigint' })
+        .references(() => users.id, { onDelete: 'cascade' }).notNull(),
+    actionKey: varchar('action_key', { length: 50 }).notNull(),
+    readyAt: timestamp('ready_at', { withTimezone: true }).notNull(),
+}, (table) => [
+    primaryKey({ columns: [table.userId, table.actionKey] })
+]);
+
+// --- RELATIONS ---
+
+export const classesRelations = relations(classes, ({ many }) => ({
+    users: many(users),
+}));
+
+export const usersRelations = relations(users, ({ one, many }) => ({
+    class: one(classes, {
+        fields: [users.classId],
+        references: [classes.id],
+    }),
+    inventory: many(inventory),
+    transactions: many(transactions),
+    quests: many(userQuests),
+    cooldowns: many(cooldowns),
+}));
+
+export const itemsRelations = relations(items, ({ many }) => ({
+    inventoryEntries: many(inventory),
+}));
+
+export const inventoryRelations = relations(inventory, ({ one }) => ({
+    user: one(users, {
+        fields: [inventory.userId],
+        references: [users.id],
+    }),
+    item: one(items, {
+        fields: [inventory.itemId],
+        references: [items.id],
+    }),
+}));
+
+export const transactionsRelations = relations(transactions, ({ one }) => ({
+    user: one(users, {
+        fields: [transactions.userId],
+        references: [users.id],
+    }),
+}));
+
+export const questsRelations = relations(quests, ({ many }) => ({
+    userEntries: many(userQuests),
+}));
+
+export const userQuestsRelations = relations(userQuests, ({ one }) => ({
+    user: one(users, {
+        fields: [userQuests.userId],
+        references: [users.id],
+    }),
+    quest: one(quests, {
+        fields: [userQuests.questId],
+        references: [quests.id],
+    }),
+}));
+
+export const cooldownsRelations = relations(cooldowns, ({ one }) => ({
+    user: one(users, {
+        fields: [cooldowns.userId],
+        references: [users.id],
+    }),
+}));

src/modules/class/class.service.ts

@@ -0,0 +1,63 @@
+
+import { classes, users } from "@/db/schema";
+import { eq, sql } from "drizzle-orm";
+import { DrizzleClient } from "@/lib/DrizzleClient";
+
+export const classService = {
+    getAllClasses: async () => {
+        return await DrizzleClient.query.classes.findMany();
+    },
+
+    assignClass: async (userId: string, classId: bigint, tx?: any) => {
+        const execute = async (txFn: any) => {
+            const cls = await txFn.query.classes.findFirst({
+                where: eq(classes.id, classId),
+            });
+
+            if (!cls) throw new Error("Class not found");
+
+            const [user] = await txFn.update(users)
+                .set({ classId: classId })
+                .where(eq(users.id, BigInt(userId)))
+                .returning();
+
+            return user;
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+
+    modifyClassBalance: async (classId: bigint, amount: bigint, tx?: any) => {
+        const execute = async (txFn: any) => {
+            const cls = await txFn.query.classes.findFirst({
+                where: eq(classes.id, classId),
+            });
+
+            if (!cls) throw new Error("Class not found");
+
+            if (amount < 0n && (cls.balance ?? 0n) < -amount) {
+                throw new Error("Insufficient class funds");
+            }
+
+            const [updatedClass] = await txFn.update(classes)
+                .set({
+                    balance: sql`${classes.balance} + ${amount}`,
+                })
+                .where(eq(classes.id, classId))
+                .returning();
+
+            return updatedClass;
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+
+    updateClass: async (id: bigint, data: Partial<typeof classes.$inferInsert>, tx?: any) => {
+        const execute = async (txFn: any) => {
+            const [updatedClass] = await txFn.update(classes)
+                .set(data)
+                .where(eq(classes.id, id))
+                .returning();
+            return updatedClass;
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    }
+};

src/modules/economy/economy.service.ts

@@ -1,18 +1,201 @@
-import { DrizzleClient } from "@lib/DrizzleClient";
+import { users, transactions, cooldowns } from "@/db/schema";
-import { users } from "@/db/schema";
+import { eq, sql, and, gt } from "drizzle-orm";
-import { eq } from "drizzle-orm";
+import { DrizzleClient } from "@/lib/DrizzleClient";
+import { userService } from "@/modules/user/user.service";
 
-export async function getUserBalance(userId: string) {
+const DAILY_REWARD_AMOUNT = 100n;
-    const user = await DrizzleClient.query.users.findFirst({ where: eq(users.userId, userId) });
+const STREAK_BONUS = 10n;
-    return user?.balance ?? 0;
+const DAILY_COOLDOWN = 24 * 60 * 60 * 1000; // 24 hours in ms
+
+export const economyService = {
+    transfer: async (fromUserId: string, toUserId: string, amount: bigint, tx?: any) => {
+        if (amount <= 0n) {
+            throw new Error("Amount must be positive");
         }
 
-export async function setUserBalance(userId: string, balance: number) {
+        if (fromUserId === toUserId) {
-    await DrizzleClient.update(users).set({ balance }).where(eq(users.userId, userId));
+            throw new Error("Cannot transfer to self");
         }
 
-export async function addUserBalance(userId: string, amount: number) {
+        const execute = async (txFn: any) => {
-    const user = await DrizzleClient.query.users.findFirst({ where: eq(users.userId, userId) });
+            // Check sender balance
-    if (!user) return;
+            const sender = await txFn.query.users.findFirst({
-    await DrizzleClient.update(users).set({ balance: user.balance + amount }).where(eq(users.userId, userId));
+                where: eq(users.id, BigInt(fromUserId)),
+            });
+
+            if (!sender) {
+                throw new Error("Sender not found");
             }
+
+            if ((sender.balance ?? 0n) < amount) {
+                throw new Error("Insufficient funds");
+            }
+
+            // Deduct from sender
+            await txFn.update(users)
+                .set({
+                    balance: sql`${users.balance} - ${amount}`,
+                })
+                .where(eq(users.id, BigInt(fromUserId)));
+
+            // Add to receiver
+            await txFn.update(users)
+                .set({
+                    balance: sql`${users.balance} + ${amount}`,
+                })
+                .where(eq(users.id, BigInt(toUserId)));
+
+            // Create transaction records
+            // 1. Debit for sender
+            await txFn.insert(transactions).values({
+                userId: BigInt(fromUserId),
+                amount: -amount,
+                type: 'TRANSFER_OUT',
+                description: `Transfer to ${toUserId}`,
+            });
+
+            // 2. Credit for receiver
+            await txFn.insert(transactions).values({
+                userId: BigInt(toUserId),
+                amount: amount,
+                type: 'TRANSFER_IN',
+                description: `Transfer from ${fromUserId}`,
+            });
+
+            return { success: true, amount };
+        };
+
+        if (tx) {
+            return await execute(tx);
+        } else {
+            return await DrizzleClient.transaction(async (t) => {
+                return await execute(t);
+            });
+        }
+    },
+
+    claimDaily: async (userId: string, tx?: any) => {
+        const execute = async (txFn: any) => {
+            const now = new Date();
+            const startOfDay = new Date(now);
+            startOfDay.setHours(0, 0, 0, 0);
+
+            // Check cooldown
+            const cooldown = await txFn.query.cooldowns.findFirst({
+                where: and(
+                    eq(cooldowns.userId, BigInt(userId)),
+                    eq(cooldowns.actionKey, 'daily')
+                ),
+            });
+
+            if (cooldown && cooldown.readyAt > now) {
+                throw new Error(`Daily already claimed. Ready at ${cooldown.readyAt}`);
+            }
+
+            // Get user for streak logic
+            const user = await txFn.query.users.findFirst({
+                where: eq(users.id, BigInt(userId)),
+            });
+
+            if (!user) {
+                throw new Error("User not found");
+            }
+
+            let streak = (user.dailyStreak || 0) + 1;
+
+            // If previous cooldown exists and expired more than 24h ago (meaning >48h since last claim), reset streak
+            if (cooldown) {
+                const timeSinceReady = now.getTime() - cooldown.readyAt.getTime();
+                if (timeSinceReady > 24 * 60 * 60 * 1000) {
+                    streak = 1;
+                }
+            } else {
+                streak = 1;
+            }
+
+            const bonus = BigInt(streak) * STREAK_BONUS;
+
+            const totalReward = DAILY_REWARD_AMOUNT + bonus;
+
+            // Update User w/ Economy Service (reuse modifyUserBalance if we split it out, but here manual is fine for atomic combined streak update)
+            // Actually, we can just update directly here as we are already refining specific fields like streak.
+            await txFn.update(users)
+                .set({
+                    balance: sql`${users.balance} + ${totalReward}`,
+                    dailyStreak: streak,
+                    xp: sql`${users.xp} + 10`, // Small XP reward for daily
+                })
+                .where(eq(users.id, BigInt(userId)));
+
+            // Set new cooldown (now + 24h)
+            const nextReadyAt = new Date(now.getTime() + DAILY_COOLDOWN);
+
+            await txFn.insert(cooldowns)
+                .values({
+                    userId: BigInt(userId),
+                    actionKey: 'daily',
+                    readyAt: nextReadyAt,
+                })
+                .onConflictDoUpdate({
+                    target: [cooldowns.userId, cooldowns.actionKey],
+                    set: { readyAt: nextReadyAt },
+                });
+
+            // Log Transaction
+            await txFn.insert(transactions).values({
+                userId: BigInt(userId),
+                amount: totalReward,
+                type: 'DAILY_REWARD',
+                description: `Daily reward (Streak: ${streak})`,
+            });
+
+            return { claimed: true, amount: totalReward, streak, nextReadyAt };
+        };
+
+        if (tx) {
+            return await execute(tx);
+        } else {
+            return await DrizzleClient.transaction(async (t) => {
+                return await execute(t);
+            });
+        }
+    },
+
+    modifyUserBalance: async (id: string, amount: bigint, type: string, description: string, tx?: any) => {
+        const execute = async (txFn: any) => {
+            if (amount < 0n) {
+                // Check sufficient funds if removing
+                const user = await txFn.query.users.findFirst({
+                    where: eq(users.id, BigInt(id))
+                });
+                if (!user || (user.balance ?? 0n) < -amount) {
+                    throw new Error("Insufficient funds");
+                }
+            }
+
+            const [user] = await txFn.update(users)
+                .set({
+                    balance: sql`${users.balance} + ${amount}`,
+                })
+                .where(eq(users.id, BigInt(id)))
+                .returning();
+
+            await txFn.insert(transactions).values({
+                userId: BigInt(id),
+                amount: amount,
+                type: type,
+                description: description,
+            });
+
+            return user;
+        };
+
+        if (tx) {
+            return await execute(tx);
+        } else {
+            return await DrizzleClient.transaction(async (t) => {
+                return await execute(t);
+            });
+        }
+    },
+};

src/modules/inventory/inventory.service.ts

@@ -0,0 +1,124 @@
+
+import { inventory, items, users } from "@/db/schema";
+import { eq, and, sql } from "drizzle-orm";
+import { DrizzleClient } from "@/lib/DrizzleClient";
+import { economyService } from "@/modules/economy/economy.service";
+
+export const inventoryService = {
+    addItem: async (userId: string, itemId: number, quantity: bigint = 1n, tx?: any) => {
+        const execute = async (txFn: any) => {
+            // Check if item exists in inventory
+            const existing = await txFn.query.inventory.findFirst({
+                where: and(
+                    eq(inventory.userId, BigInt(userId)),
+                    eq(inventory.itemId, itemId)
+                ),
+            });
+
+            if (existing) {
+                const [entry] = await txFn.update(inventory)
+                    .set({
+                        quantity: sql`${inventory.quantity} + ${quantity}`,
+                    })
+                    .where(and(
+                        eq(inventory.userId, BigInt(userId)),
+                        eq(inventory.itemId, itemId)
+                    ))
+                    .returning();
+                return entry;
+            } else {
+                const [entry] = await txFn.insert(inventory)
+                    .values({
+                        userId: BigInt(userId),
+                        itemId: itemId,
+                        quantity: quantity,
+                    })
+                    .returning();
+                return entry;
+            }
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+
+    removeItem: async (userId: string, itemId: number, quantity: bigint = 1n, tx?: any) => {
+        const execute = async (txFn: any) => {
+            const existing = await txFn.query.inventory.findFirst({
+                where: and(
+                    eq(inventory.userId, BigInt(userId)),
+                    eq(inventory.itemId, itemId)
+                ),
+            });
+
+            if (!existing || (existing.quantity ?? 0n) < quantity) {
+                throw new Error("Insufficient item quantity");
+            }
+
+            if ((existing.quantity ?? 0n) === quantity) {
+                // Delete if quantity becomes 0
+                await txFn.delete(inventory)
+                    .where(and(
+                        eq(inventory.userId, BigInt(userId)),
+                        eq(inventory.itemId, itemId)
+                    ));
+                return { itemId, quantity: 0n, userId: BigInt(userId) };
+            } else {
+                const [entry] = await txFn.update(inventory)
+                    .set({
+                        quantity: sql`${inventory.quantity} - ${quantity}`,
+                    })
+                    .where(and(
+                        eq(inventory.userId, BigInt(userId)),
+                        eq(inventory.itemId, itemId)
+                    ))
+                    .returning();
+                return entry;
+            }
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+
+    getInventory: async (userId: string) => {
+        return await DrizzleClient.query.inventory.findMany({
+            where: eq(inventory.userId, BigInt(userId)),
+            with: {
+                item: true,
+            },
+        });
+    },
+
+    buyItem: async (userId: string, itemId: number, quantity: bigint = 1n, tx?: any) => {
+        const execute = async (txFn: any) => {
+            const item = await txFn.query.items.findFirst({
+                where: eq(items.id, itemId),
+            });
+
+            if (!item) throw new Error("Item not found");
+            if (!item.price) throw new Error("Item is not for sale");
+
+            const totalPrice = item.price * quantity;
+
+            // Deduct Balance using economy service (passing tx ensures atomicity)
+            await economyService.modifyUserBalance(userId, -totalPrice, 'PURCHASE', `Bought ${quantity}x ${item.name}`, txFn);
+
+            // Add Item (using local logic to keep in same tx, or could refactor addItem to take tx too and call it)
+            // Let's refactor addItem below to accept tx, then call it here?
+            // Since we are modifying buyItem, we can just inline the item addition or call addItem if we update it.
+            // Let's assume we update addItem next. For now, inline the add logic but cleaner.
+
+            const existingInv = await txFn.query.inventory.findFirst({
+                where: and(eq(inventory.userId, BigInt(userId)), eq(inventory.itemId, itemId)),
+            });
+
+            if (existingInv) {
+                await txFn.update(inventory).set({ quantity: sql`${inventory.quantity} + ${quantity}` })
+                    .where(and(eq(inventory.userId, BigInt(userId)), eq(inventory.itemId, itemId)));
+            } else {
+                await txFn.insert(inventory).values({ userId: BigInt(userId), itemId, quantity });
+            }
+
+            return { success: true, item, totalPrice };
+        };
+
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    }
+};

src/modules/leveling/leveling.service.ts

@@ -0,0 +1,58 @@
+import { users } from "@/db/schema";
+import { eq, sql } from "drizzle-orm";
+import { DrizzleClient } from "@/lib/DrizzleClient";
+
+// Simple configurable curve: Base * (Level ^ Exponent)
+const XP_BASE = 1000;
+const XP_EXPONENT = 1.5;
+
+export const levelingService = {
+    // Calculate XP required for a specific level
+    getXpForLevel: (level: number) => {
+        return Math.floor(XP_BASE * Math.pow(level, XP_EXPONENT));
+    },
+
+    addXp: async (id: string, amount: bigint, tx?: any) => {
+        const execute = async (txFn: any) => {
+            // Get current state
+            const user = await txFn.query.users.findFirst({
+                where: eq(users.id, BigInt(id)),
+            });
+
+            if (!user) throw new Error("User not found");
+
+            let newXp = (user.xp ?? 0n) + amount;
+            let currentLevel = user.level ?? 1;
+            let levelUp = false;
+
+            // Check for level up loop
+            let xpForNextLevel = BigInt(levelingService.getXpForLevel(currentLevel));
+
+            while (newXp >= xpForNextLevel) {
+                newXp -= xpForNextLevel;
+                currentLevel++;
+                levelUp = true;
+                xpForNextLevel = BigInt(levelingService.getXpForLevel(currentLevel));
+            }
+
+            // Update user
+            const [updatedUser] = await txFn.update(users)
+                .set({
+                    xp: newXp,
+                    level: currentLevel,
+                })
+                .where(eq(users.id, BigInt(id)))
+                .returning();
+
+            return { user: updatedUser, levelUp, currentLevel };
+        }
+
+        if (tx) {
+            return await execute(tx);
+        } else {
+            return await DrizzleClient.transaction(async (t) => {
+                return await execute(t);
+            })
+        }
+    },
+};

src/modules/quest/quest.service.ts

@@ -0,0 +1,89 @@
+
+import { quests, userQuests, users } from "@/db/schema";
+import { eq, and, sql } from "drizzle-orm";
+import { DrizzleClient } from "@/lib/DrizzleClient";
+import { economyService } from "@/modules/economy/economy.service";
+import { levelingService } from "@/modules/leveling/leveling.service";
+
+export const questService = {
+    assignQuest: async (userId: string, questId: number, tx?: any) => {
+        const execute = async (txFn: any) => {
+            return await txFn.insert(userQuests)
+                .values({
+                    userId: BigInt(userId),
+                    questId: questId,
+                    progress: 0,
+                })
+                .onConflictDoNothing() // Ignore if already assigned
+                .returning();
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+
+    updateProgress: async (userId: string, questId: number, progress: number, tx?: any) => {
+        const execute = async (txFn: any) => {
+            return await txFn.update(userQuests)
+                .set({ progress: progress })
+                .where(and(
+                    eq(userQuests.userId, BigInt(userId)),
+                    eq(userQuests.questId, questId)
+                ))
+                .returning();
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+
+    completeQuest: async (userId: string, questId: number, tx?: any) => {
+        const execute = async (txFn: any) => {
+            const userQuest = await txFn.query.userQuests.findFirst({
+                where: and(
+                    eq(userQuests.userId, BigInt(userId)),
+                    eq(userQuests.questId, questId)
+                ),
+                with: {
+                    quest: true,
+                }
+            });
+
+            if (!userQuest) throw new Error("Quest not assigned");
+            if (userQuest.completedAt) throw new Error("Quest already completed");
+
+            // Mark completed
+            await txFn.update(userQuests)
+                .set({ completedAt: new Date() })
+                .where(and(
+                    eq(userQuests.userId, BigInt(userId)),
+                    eq(userQuests.questId, questId)
+                ));
+
+            // Distribute Rewards
+            const rewards = userQuest.quest.rewards as { xp?: number, balance?: number };
+            const results = { xp: 0n, balance: 0n };
+
+            if (rewards?.balance) {
+                const bal = BigInt(rewards.balance);
+                await economyService.modifyUserBalance(userId, bal, 'QUEST_REWARD', `Reward for quest ${questId}`, txFn);
+                results.balance = bal;
+            }
+
+            if (rewards?.xp) {
+                const xp = BigInt(rewards.xp);
+                await levelingService.addXp(userId, xp, txFn);
+                results.xp = xp;
+            }
+
+            return { success: true, rewards: results };
+        };
+
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+
+    getUserQuests: async (userId: string) => {
+        return await DrizzleClient.query.userQuests.findMany({
+            where: eq(userQuests.userId, BigInt(userId)),
+            with: {
+                quest: true,
+            }
+        });
+    }
+};

src/modules/user/user.service.ts

@@ -0,0 +1,44 @@
+import { users } from "@/db/schema";
+import { eq, sql } from "drizzle-orm";
+import { DrizzleClient } from "@/lib/DrizzleClient";
+
+export const userService = {
+    getUserById: async (id: string) => {
+        const user = await DrizzleClient.query.users.findFirst({
+            where: eq(users.id, BigInt(id)),
+            with: { class: true }
+        });
+        return user;
+    },
+    getUserByUsername: async (username: string) => {
+        const user = await DrizzleClient.query.users.findFirst({ where: eq(users.username, username) });
+        return user;
+    },
+    createUser: async (id: string | bigint, username: string, classId?: bigint, tx?: any) => {
+        const execute = async (txFn: any) => {
+            const [user] = await txFn.insert(users).values({
+                id: BigInt(id),
+                username,
+                classId,
+            }).returning();
+            return user;
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+    updateUser: async (id: string, data: Partial<typeof users.$inferInsert>, tx?: any) => {
+        const execute = async (txFn: any) => {
+            const [user] = await txFn.update(users)
+                .set(data)
+                .where(eq(users.id, BigInt(id)))
+                .returning();
+            return user;
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+    deleteUser: async (id: string, tx?: any) => {
+        const execute = async (txFn: any) => {
+            await txFn.delete(users).where(eq(users.id, BigInt(id)));
+        };
+        return tx ? await execute(tx) : await DrizzleClient.transaction(execute);
+    },
+};

src/modules/users/users.service.ts

@@ -1,15 +0,0 @@
-import { DrizzleClient } from "@lib/DrizzleClient";
-import { users } from "@/db/schema";
-import { eq } from "drizzle-orm";
-
-export async function getUserById(userId: string) {
-    return await DrizzleClient.query.users.findFirst({ where: eq(users.userId, userId) });
-}
-
-export async function createUser(userId: string) {
-    return (await DrizzleClient.insert(users).values({ userId }).returning())[0]!;
-}
-
-export async function updateUserDaily(userId: string, lastDaily: Date, dailyStreak: number) {
-    await DrizzleClient.update(users).set({ lastDaily, dailyStreak }).where(eq(users.userId, userId));
-}

src/scripts/read-env.ts

@@ -0,0 +1,9 @@
+
+import { readFile } from "fs/promises";
+
+try {
+    const content = await readFile(".env", "utf-8");
+    console.log(content);
+} catch (e) {
+    console.error(e);
+}

src/scripts/test-db.ts

@@ -0,0 +1,23 @@
+
+import { userService } from "@/modules/user/user.service";
+import { DrizzleClient } from "@/lib/DrizzleClient";
+import { users } from "@/db/schema";
+import { eq } from "drizzle-orm";
+
+console.log("Starting test...");
+
+try {
+    const id = "109998942841765888";
+
+    console.log("Fetching user...");
+    const user = await userService.getUserById(id);
+    console.log("User fetched:", user);
+
+    if (user?.class) {
+        console.log("User class fetched:", user.class);
+    }
+} catch (e) {
+    console.error("Error:", e);
+}
+
+process.exit(0);

src/scripts/test-env.ts

@@ -0,0 +1,4 @@
+
+import { env } from "@lib/env";
+
+console.log("DATABASE_URL:", env.DATABASE_URL);

src/scripts/write-env.ts

@@ -0,0 +1,20 @@
+
+import { writeFile } from "fs/promises";
+
+const content = `DB_USER=kyoko
+DB_PASSWORD=kyoko
+DB_NAME=kyoko
+DB_PORT=5432
+DB_HOST=localhost
+DISCORD_BOT_TOKEN=MTQ0Mzg4NTA3NDM0ODExODA5OA.GcX7aT.S6G2jWqLmPAOx04JBHhJn7TCPsx5pK5RMUxN3g
+DISCORD_CLIENT_ID=1443885074348118098
+DISCORD_GUILD_ID=1443887793565728870
+DATABASE_URL=postgres://kyoko:kyoko@localhost:5432/kyoko
+`;
+
+try {
+    await writeFile(".env", content);
+    console.log("Updated .env");
+} catch (e) {
+    console.error(e);
+}