1 files changed, 75 insertions, 0 deletions
diff --git a/item/item.go b/item/item.go
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+++ b/item/item.go
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+/* OpenBills-server - Server for libre billing software OpenBills-web
+ * Copyright (C) 2022  Vidhu Kant Sharma <vidhukant@vidhukant.xyz>
+
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package item
+
+import (
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.mongodb.org/mongo-driver/mongo"
+	"github.com/MikunoNaka/OpenBills-server/database"
+	"github.com/MikunoNaka/OpenBills-server/brand"
+)
+
+// initialise a database connection for this package
+// not sure if I should do this but I am...
+var db *mongo.Collection = database.DB.Collection("Items")
+
+/* each invoice must contain at least one item
+ * you should be able to:
+ * - add, modify, delete an item
+ * - add item to invoice
+ */
+
+/* An item is any product
+ * or service that can be sold
+ * Items may have a max and min quanity
+ * and some default fields like GST and Unit Price
+ * that don't need to be entered manually
+ *
+ * the front-end may or may not implement
+ * the default fields
+ *
+ * Items can be assigned brands
+ * and certain actions can be performed
+ * on the products of a brand altogether
+ */
+type Item struct {
+	Id primitive.ObjectID      `bson:"_id,omitempty" json:"Id"`
+	Brand brand.Brand          `bson:"Brand,omitempty" json:"Brand"`
+	UnitOfMeasure      string  `bson:"UnitOfMeasure" json:"UnitOfMeasure"`
+	HasDecimalQuantity bool    `bson:"HasDecimalQuantity, json:"HasDecimalQuantity"`
+    // just the defaults, can be overridden in an invoice
+	Name               string  `bson:"Name" json:"Name"`
+	Description        string  `bson:"Description" json:"Description"`
+	HSN                string  `bson:"HSN" json:"HSN"`
+	UnitPrice          float64 `bson:"UnitPrice" json:"UnitPrice"`
+	// default tax percentage
+	GSTPercentage      float64 `bson:"GSTPercentage" json:"GSTPercentage"`
+	MaxQuantity        float64 `bson:"MaxQuantity" json:"MaxQuantity"`
+	MinQuantity        float64 `bson:"MinQuantity" json:"MinQuantity"`
+}
+
+// Item but with extra fields an invoice might require
+type InvoiceItem struct {
+	Item
+	/* Each product must have a quantity
+	 * but it is upto the backend to enforce that
+	 */
+	// TODO: float64 isn't ideal, find a better way
+	Quantity           float64 `bson:"Quantitiy" json:"Quantity"`
+	DiscountPercentage float64 `bson:"DiscountPercentage,omitempty" json:"DiscountPercentage"`
+}