first commit

apps/api/src/wallets/wallets.service.ts

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+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+import { getTempUserId } from '../common/user.util';
+
+@Injectable()
+export class WalletsService {
+  constructor(private prisma: PrismaService) {}
+
+  private userId() {
+    return getTempUserId();
+  }
+
+  list() {
+    return this.prisma.wallet.findMany({
+      where: { userId: this.userId(), deletedAt: null },
+      orderBy: { createdAt: 'asc' },
+    });
+  }
+
+  create(input: { name: string; currency?: string; kind?: 'money' | 'asset'; unit?: string; initialAmount?: number; pricePerUnit?: number }) {
+    const kind = input.kind ?? 'money';
+    return this.prisma.wallet.create({
+      data: {
+        userId: this.userId(),
+        name: input.name,
+        kind,
+        currency: kind === 'money' ? (input.currency ?? 'IDR') : null,
+        unit: kind === 'asset' ? (input.unit ?? null) : null,
+        initialAmount: input.initialAmount || null,
+        pricePerUnit: kind === 'asset' ? (input.pricePerUnit || null) : null,
+      },
+    });
+  }
+
+  update(id: string, input: { name?: string; currency?: string; kind?: 'money' | 'asset'; unit?: string; initialAmount?: number; pricePerUnit?: number }) {
+    const updateData: any = {};
+    
+    if (input.name !== undefined) updateData.name = input.name;
+    if (input.kind !== undefined) {
+      updateData.kind = input.kind;
+      // Reset currency/unit based on kind
+      if (input.kind === 'money') {
+        updateData.currency = input.currency ?? 'IDR';
+        updateData.unit = null;
+      } else {
+        updateData.unit = input.unit ?? null;
+        updateData.currency = null;
+      }
+    } else {
+      // If kind is not changing, update currency/unit as provided
+      if (input.currency !== undefined) updateData.currency = input.currency;
+      if (input.unit !== undefined) updateData.unit = input.unit;
+    }
+
+    // Handle initialAmount and pricePerUnit
+    if (input.initialAmount !== undefined) updateData.initialAmount = input.initialAmount || null;
+    if (input.pricePerUnit !== undefined) updateData.pricePerUnit = input.pricePerUnit || null;
+
+    return this.prisma.wallet.update({
+      where: { id, userId: this.userId() },
+      data: updateData,
+    });
+  }
+
+  delete(id: string) {
+    // Soft delete by setting deletedAt
+    return this.prisma.wallet.update({
+      where: { id, userId: this.userId() },
+      data: { deletedAt: new Date() },
+    });
+  }
+}