Init

src/data/dashboard.queries.ts

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+import { prisma } from "@/lib/prisma";
+
+interface LowStockItem {
+  id: string;
+  name: string;
+  type: "filament" | "resin" | "paint";
+  colorHex: string;
+  remaining: number;
+  total: number;
+  percent: number;
+}
+
+interface RecentUsage {
+  id: string;
+  itemType: string;
+  amount: number;
+  unit: string;
+  notes: string | null;
+  createdAt: Date;
+  itemName: string;
+}
+
+export interface DashboardStats {
+  totalItems: number;
+  inventoryValue: number;
+  lowStockCount: number;
+  recentActivityCount: number;
+  lowStockItems: LowStockItem[];
+  recentUsage: RecentUsage[];
+}
+
+export async function getDashboardStats(
+  userId: string,
+  lowStockThreshold: number
+): Promise<DashboardStats> {
+  const [filaments, resins, paints, usageLogs24h, recentLogs] = await Promise.all([
+    prisma.filament.findMany({
+      where: { userId, archived: false },
+      select: {
+        id: true,
+        name: true,
+        colorHex: true,
+        spoolWeight: true,
+        usedWeight: true,
+        cost: true,
+      },
+    }),
+    prisma.resin.findMany({
+      where: { userId, archived: false },
+      select: {
+        id: true,
+        name: true,
+        colorHex: true,
+        bottleSize: true,
+        usedML: true,
+        cost: true,
+      },
+    }),
+    prisma.paint.findMany({
+      where: { userId, archived: false },
+      select: {
+        id: true,
+        name: true,
+        colorHex: true,
+        volumeML: true,
+        usedML: true,
+        cost: true,
+      },
+    }),
+    prisma.usageLog.count({
+      where: {
+        userId,
+        createdAt: { gte: new Date(Date.now() - 24 * 60 * 60 * 1000) },
+      },
+    }),
+    prisma.usageLog.findMany({
+      where: { userId },
+      orderBy: { createdAt: "desc" },
+      take: 10,
+      include: {
+        filament: { select: { name: true } },
+        resin: { select: { name: true } },
+        paint: { select: { name: true } },
+      },
+    }),
+  ]);
+
+  const totalItems = filaments.length + resins.length + paints.length;
+
+  const inventoryValue =
+    filaments.reduce((sum: number, f: { cost: number | null }) => sum + (f.cost ?? 0), 0) +
+    resins.reduce((sum: number, r: { cost: number | null }) => sum + (r.cost ?? 0), 0) +
+    paints.reduce((sum: number, p: { cost: number | null }) => sum + (p.cost ?? 0), 0);
+
+  const lowStockItems: LowStockItem[] = [];
+
+  for (const f of filaments) {
+    const remaining = f.spoolWeight - f.usedWeight;
+    const percent = f.spoolWeight > 0 ? (remaining / f.spoolWeight) * 100 : 0;
+    if (percent <= lowStockThreshold && percent > 0) {
+      lowStockItems.push({
+        id: f.id,
+        name: f.name,
+        type: "filament",
+        colorHex: f.colorHex,
+        remaining,
+        total: f.spoolWeight,
+        percent,
+      });
+    }
+  }
+
+  for (const r of resins) {
+    const remaining = r.bottleSize - r.usedML;
+    const percent = r.bottleSize > 0 ? (remaining / r.bottleSize) * 100 : 0;
+    if (percent <= lowStockThreshold && percent > 0) {
+      lowStockItems.push({
+        id: r.id,
+        name: r.name,
+        type: "resin",
+        colorHex: r.colorHex,
+        remaining,
+        total: r.bottleSize,
+        percent,
+      });
+    }
+  }
+
+  for (const p of paints) {
+    const remaining = p.volumeML - p.usedML;
+    const percent = p.volumeML > 0 ? (remaining / p.volumeML) * 100 : 0;
+    if (percent <= lowStockThreshold && percent > 0) {
+      lowStockItems.push({
+        id: p.id,
+        name: p.name,
+        type: "paint",
+        colorHex: p.colorHex,
+        remaining,
+        total: p.volumeML,
+        percent,
+      });
+    }
+  }
+
+  lowStockItems.sort((a, b) => a.percent - b.percent);
+
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const recentUsage: RecentUsage[] = recentLogs.map((log: any) => ({
+    id: log.id,
+    itemType: log.itemType,
+    amount: log.amount,
+    unit: log.unit,
+    notes: log.notes,
+    createdAt: log.createdAt,
+    itemName:
+      log.filament?.name ?? log.resin?.name ?? log.paint?.name ?? "Unknown",
+  }));
+
+  return {
+    totalItems,
+    inventoryValue,
+    lowStockCount: lowStockItems.length,
+    recentActivityCount: usageLogs24h,
+    lowStockItems,
+    recentUsage,
+  };
+}