Initial commit: NetsKey ERP (copper & cream redesign)

src/lib/server/models/Expense.ts

@@ -0,0 +1,48 @@
+import { Schema, model, models, Model, Types, Document } from "mongoose";
+
+// Business expense categories. Kept as a constrained string set so the UI
+// can offer a dropdown while the owner can still extend later via code.
+export const EXPENSE_CATEGORIES = [
+  "Transport",
+  "Electricity",
+  "Rent",
+  "Salaries",
+  "Repairs",
+  "Packaging",
+  "Other",
+] as const;
+export type ExpenseCategory = (typeof EXPENSE_CATEGORIES)[number];
+
+export interface IExpense extends Document {
+  _id: Types.ObjectId;
+  branchId: Types.ObjectId;
+  category: ExpenseCategory;
+  amount: number;
+  description: string;
+  reference: string | null;
+  notes: string | null;
+  recordedBy: Types.ObjectId;
+  createdAt: Date; // authoritative — server clock
+  updatedAt: Date;
+}
+
+const expenseSchema = new Schema<IExpense>(
+  {
+    branchId: { type: Schema.Types.ObjectId, ref: "Branch", required: true },
+    category: { type: String, enum: EXPENSE_CATEGORIES, required: true },
+    amount: { type: Number, required: true, min: 0 },
+    description: { type: String, required: true, trim: true },
+    reference: { type: String, default: null, trim: true },
+    notes: { type: String, default: null, trim: true },
+    recordedBy: { type: Schema.Types.ObjectId, ref: "User", required: true },
+  },
+  { timestamps: true } // createdAt/updatedAt from the server clock, never client input
+);
+
+expenseSchema.index({ branchId: 1, createdAt: -1 });
+expenseSchema.index({ category: 1 });
+
+// `models.Expense` guard avoids OverwriteModelError on serverless warm
+// re-invocations where the module is evaluated more than once.
+export const Expense =
+  (models.Expense as Model<IExpense>) || model<IExpense>("Expense", expenseSchema);