location controller updated with heading and created new models and controllers for remaining modules

models/Invoice/model.js

@@ -1,5 +1,108 @@
 import { model, Schema, Types } from "mongoose";
 
-const schema = new Schema({});
+const paymentHistorySchema = new Schema({
+  amount: {
+    type: Number,
+    required: true,
+  },
+  paymentDate: {
+    type: Date,
+    required: true,
+  },
+  paymentMethod: {
+    type: String,
+    required: true,
+  },
+  transactionId: {
+    type: String,
+    required: true,
+  },
+  createdOn: {
+    type: Date,
+    required: true,
+  },
+  createdBy: {
+    type: Types.ObjectId,
+    ref: "user",
+    required: true,
+  },
+});
+
+const itemSchema = new Schema({
+  id: {
+    type: Types.ObjectId,
+    required: true,
+  },
+  unitCostPrice: {
+    type: Number,
+    required: true,
+  },
+  unitSellingPrice: {
+    type: Number,
+    required: true,
+  },
+  qty: {
+    type: Number,
+    required: true,
+  },
+  taxPercent: {
+    type: Number,
+    required: true,
+  },
+  taxAmount: {
+    type: Number,
+    required: true,
+  },
+  discount: {
+    type: Number,
+    required: true,
+  },
+  total: {
+    type: Number,
+    required: true,
+  },
+});
+
+const schema = new Schema({
+  customer: {
+    type: Types.ObjectId,
+    ref: "partner",
+    required: true,
+  },
+  items: {
+    type: [itemSchema],
+    required: true,
+  },
+  netTotal: {
+    type: Number,
+    required: true,
+  },
+  total: {
+    type: Number,
+    required: true,
+  },
+  status: {
+    type: String,
+    enum: ["PENDING", "COMPLETED", "PARTIAL"],
+    default: "PENDING",
+  },
+  dueDate: {
+    type: Date,
+    required: true,
+  },
+  createdOn: {
+    type: Date,
+    required: true,
+  },
+  createdBy: {
+    type: Types.ObjectId,
+    ref: "user",
+    required: true,
+  },
+  paymentHistory: {
+    type: [paymentHistorySchema],
+    default: [],
+  },
+});
 
 export default model("invoice", schema);