generate_barcode_value (inventory.py)

Generates valid barcode values with checksums for EAN, UPC, ISBN, ISSN, and PZN formats in retail inventory management.

import frappe
from frappe import _
from frappe.utils import now, nowdate
import qrcode
from io import BytesIO
import base64
from frappe.model.naming import NamingSeries, get_default_naming_series
from frappe.client import get_value
from frappe.utils.file_manager import save_file

@frappe.whitelist()
def generate_barcode_value(barcode_type):
    import random

    t = barcode_type.upper().replace("-", "").replace(" ", "")

    def gen_ean(length):
        base = [random.randint(0, 9) for _ in range(length - 1)]
        total = sum(d * (1 if i % 2 == 0 else 3) for i, d in enumerate(base))
        check = (10 - (total % 10)) % 10
        return ''.join(str(d) for d in base) + str(check)

    def gen_upc():
        base = [random.randint(0, 9) for _ in range(11)]
        total = sum(d * (3 if 

... (truncated -- full source via MCP)