brotherton-erpnext/erpnext/regional/saudi_arabia/utils.py

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import io
import os
from base64 import b64encode
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import frappe
from frappe import _
from frappe.custom.doctype.custom_field.custom_field import create_custom_fields
from frappe.utils.data import add_to_date, get_time, getdate
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from pyqrcode import create as qr_create
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from erpnext import get_region
def create_qr_code(doc, method=None):
region = get_region(doc.company)
if region not in ['Saudi Arabia']:
return
# if QR Code field not present, create it. Invoices without QR are invalid as per law.
if not hasattr(doc, 'ksa_einv_qr'):
create_custom_fields({
doc.doctype: [
dict(
fieldname='ksa_einv_qr',
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label='KSA E-Invoicing QR',
fieldtype='Attach Image',
read_only=1, no_copy=1, hidden=1
)
]
})
# Don't create QR Code if it already exists
qr_code = doc.get("ksa_einv_qr")
if qr_code and frappe.db.exists({"doctype": "File", "file_url": qr_code}):
return
meta = frappe.get_meta(doc.doctype)
if "ksa_einv_qr" in [d.fieldname for d in meta.get_image_fields()]:
''' TLV conversion for
1. Seller's Name
2. VAT Number
3. Time Stamp
4. Invoice Amount
5. VAT Amount
'''
tlv_array = []
# Sellers Name
seller_name = frappe.db.get_value(
'Company',
doc.company,
'company_name_in_arabic')
if not seller_name:
frappe.throw(_('Arabic name missing for {} in the company document').format(doc.company))
tag = bytes([1]).hex()
length = bytes([len(seller_name.encode('utf-8'))]).hex()
value = seller_name.encode('utf-8').hex()
tlv_array.append(''.join([tag, length, value]))
# VAT Number
tax_id = frappe.db.get_value('Company', doc.company, 'tax_id')
if not tax_id:
frappe.throw(_('Tax ID missing for {} in the company document').format(doc.company))
tag = bytes([2]).hex()
length = bytes([len(tax_id)]).hex()
value = tax_id.encode('utf-8').hex()
tlv_array.append(''.join([tag, length, value]))
# Time Stamp
posting_date = getdate(doc.posting_date)
time = get_time(doc.posting_time)
seconds = time.hour * 60 * 60 + time.minute * 60 + time.second
time_stamp = add_to_date(posting_date, seconds=seconds)
time_stamp = time_stamp.strftime('%Y-%m-%dT%H:%M:%SZ')
tag = bytes([3]).hex()
length = bytes([len(time_stamp)]).hex()
value = time_stamp.encode('utf-8').hex()
tlv_array.append(''.join([tag, length, value]))
# Invoice Amount
invoice_amount = str(doc.grand_total)
tag = bytes([4]).hex()
length = bytes([len(invoice_amount)]).hex()
value = invoice_amount.encode('utf-8').hex()
tlv_array.append(''.join([tag, length, value]))
# VAT Amount
vat_amount = str(get_vat_amount(doc))
tag = bytes([5]).hex()
length = bytes([len(vat_amount)]).hex()
value = vat_amount.encode('utf-8').hex()
tlv_array.append(''.join([tag, length, value]))
# Joining bytes into one
tlv_buff = ''.join(tlv_array)
# base64 conversion for QR Code
base64_string = b64encode(bytes.fromhex(tlv_buff)).decode()
qr_image = io.BytesIO()
url = qr_create(base64_string, error='L')
url.png(qr_image, scale=2, quiet_zone=1)
name = frappe.generate_hash(doc.name, 5)
# making file
filename = f"QRCode-{name}.png".replace(os.path.sep, "__")
_file = frappe.get_doc({
"doctype": "File",
"file_name": filename,
"is_private": 0,
"content": qr_image.getvalue(),
"attached_to_doctype": doc.get("doctype"),
"attached_to_name": doc.get("name"),
"attached_to_field": "ksa_einv_qr"
})
_file.save()
# assigning to document
doc.db_set('ksa_einv_qr', _file.file_url)
doc.notify_update()
def get_vat_amount(doc):
vat_settings = frappe.db.get_value('KSA VAT Setting', {'company': doc.company})
vat_accounts = []
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vat_amount = 0
if vat_settings:
vat_settings_doc = frappe.get_doc('KSA VAT Setting', vat_settings)
for row in vat_settings_doc.get('ksa_vat_sales_accounts'):
vat_accounts.append(row.account)
for tax in doc.get('taxes'):
if tax.account_head in vat_accounts:
vat_amount += tax.tax_amount
return vat_amount
def delete_qr_code_file(doc, method=None):
region = get_region(doc.company)
if region not in ['Saudi Arabia']:
return
if hasattr(doc, 'ksa_einv_qr'):
if doc.get('ksa_einv_qr'):
file_doc = frappe.get_list('File', {
'file_url': doc.get('ksa_einv_qr')
})
if len(file_doc):
frappe.delete_doc('File', file_doc[0].name)
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def delete_vat_settings_for_company(doc, method=None):
if doc.country != 'Saudi Arabia':
return
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if frappe.db.exists('KSA VAT Setting', doc.name):
frappe.delete_doc('KSA VAT Setting', doc.name)