1 files changed, 129 insertions, 0 deletions
diff --git a/addons/l10n_in/models/account_invoice.py b/addons/l10n_in/models/account_invoice.py
new file mode 100644
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+++ b/addons/l10n_in/models/account_invoice.py
@@ -0,0 +1,129 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, fields, models, _
+from odoo.exceptions import ValidationError
+
+
+class AccountMove(models.Model):
+    _inherit = "account.move"
+
+    @api.depends('amount_total')
+    def _compute_amount_total_words(self):
+        for invoice in self:
+            invoice.amount_total_words = invoice.currency_id.amount_to_text(invoice.amount_total)
+
+    amount_total_words = fields.Char("Total (In Words)", compute="_compute_amount_total_words")
+    l10n_in_gst_treatment = fields.Selection([
+            ('regular', 'Registered Business - Regular'),
+            ('composition', 'Registered Business - Composition'),
+            ('unregistered', 'Unregistered Business'),
+            ('consumer', 'Consumer'),
+            ('overseas', 'Overseas'),
+            ('special_economic_zone', 'Special Economic Zone'),
+            ('deemed_export', 'Deemed Export')
+        ], string="GST Treatment", readonly=True, states={'draft': [('readonly', False)]})
+    l10n_in_state_id = fields.Many2one('res.country.state', string="Location of supply")
+    l10n_in_company_country_code = fields.Char(related='company_id.country_id.code', string="Country code")
+    l10n_in_gstin = fields.Char(string="GSTIN")
+    # For Export invoice this data is need in GSTR report
+    l10n_in_shipping_bill_number = fields.Char('Shipping bill number', readonly=True, states={'draft': [('readonly', False)]})
+    l10n_in_shipping_bill_date = fields.Date('Shipping bill date', readonly=True, states={'draft': [('readonly', False)]})
+    l10n_in_shipping_port_code_id = fields.Many2one('l10n_in.port.code', 'Port code', states={'draft': [('readonly', False)]})
+    l10n_in_reseller_partner_id = fields.Many2one('res.partner', 'Reseller', domain=[('vat', '!=', False)], help="Only Registered Reseller", readonly=True, states={'draft': [('readonly', False)]})
+
+    @api.onchange('partner_id')
+    def _onchange_partner_id(self):
+        """Use journal type to define document type because not miss state in any entry including POS entry"""
+        if self.l10n_in_company_country_code == 'IN':
+            self.l10n_in_gst_treatment = self.partner_id.l10n_in_gst_treatment
+        return super()._onchange_partner_id()
+
+    @api.model
+    def _l10n_in_get_indian_state(self, partner):
+        """In tax return filing, If customer is not Indian in that case place of supply is must set to Other Territory.
+        So we set Other Territory in l10n_in_state_id when customer(partner) is not Indian
+        Also we raise if state is not set in Indian customer.
+        State is big role under GST because tax type is depend on.for more information check this https://www.cbic.gov.in/resources//htdocs-cbec/gst/Integrated%20goods%20&%20Services.pdf"""
+        if partner.country_id and partner.country_id.code == 'IN' and not partner.state_id:
+            raise ValidationError(_("State is missing from address in '%s'. First set state after post this invoice again.", partner.name))
+        elif partner.country_id and partner.country_id.code != 'IN':
+            return self.env.ref('l10n_in.state_in_ot')
+        return partner.state_id
+
+
+    @api.model
+    def _get_tax_grouping_key_from_tax_line(self, tax_line):
+        # OVERRIDE to group taxes also by product.
+        res = super()._get_tax_grouping_key_from_tax_line(tax_line)
+        if tax_line.move_id.journal_id.company_id.country_id.code == 'IN':
+            res['product_id'] = tax_line.product_id.id
+            res['product_uom_id'] = tax_line.product_uom_id
+        return res
+
+    @api.model
+    def _get_tax_grouping_key_from_base_line(self, base_line, tax_vals):
+        # OVERRIDE to group taxes also by product.
+        res = super()._get_tax_grouping_key_from_base_line(base_line, tax_vals)
+        if base_line.move_id.journal_id.company_id.country_id.code == 'IN':
+            res['product_id'] = base_line.product_id.id
+            res['product_uom_id'] = base_line.product_uom_id
+        return res
+
+    @api.model
+    def _get_tax_key_for_group_add_base(self, line):
+        # DEPRECATED: TO BE REMOVED IN MASTER
+        tax_key = super(AccountMove, self)._get_tax_key_for_group_add_base(line)
+
+        tax_key += [
+            line.product_id.id,
+            line.product_uom_id,
+        ]
+        return tax_key
+
+    def _l10n_in_get_shipping_partner(self):
+        """Overwrite in sale"""
+        self.ensure_one()
+        return self.partner_id
+
+    @api.model
+    def _l10n_in_get_shipping_partner_gstin(self, shipping_partner):
+        """Overwrite in sale"""
+        return shipping_partner.vat
+
+    def _post(self, soft=True):
+        """Use journal type to define document type because not miss state in any entry including POS entry"""
+        posted = super()._post(soft)
+        gst_treatment_name_mapping = {k: v for k, v in
+                             self._fields['l10n_in_gst_treatment']._description_selection(self.env)}
+        for move in posted.filtered(lambda m: m.l10n_in_company_country_code == 'IN'):
+            """Check state is set in company/sub-unit"""
+            company_unit_partner = move.journal_id.l10n_in_gstin_partner_id or move.journal_id.company_id
+            if not company_unit_partner.state_id:
+                raise ValidationError(_(
+                    "State is missing from your company/unit %(company_name)s (%(company_id)s).\nFirst set state in your company/unit.",
+                    company_name=company_unit_partner.name,
+                    company_id=company_unit_partner.id
+                ))
+            elif self.journal_id.type == 'purchase':
+                move.l10n_in_state_id = company_unit_partner.state_id
+
+            shipping_partner = move._l10n_in_get_shipping_partner()
+            # In case of shipping address does not have GSTN then also check customer(partner_id) GSTN
+            # This happens when Bill-to Ship-to transaction where shipping(Ship-to) address is unregistered and customer(Bill-to) is registred.
+            move.l10n_in_gstin = move._l10n_in_get_shipping_partner_gstin(shipping_partner) or move.partner_id.vat
+            if not move.l10n_in_gstin and move.l10n_in_gst_treatment in ['regular', 'composition', 'special_economic_zone', 'deemed_export']:
+                raise ValidationError(_(
+                    "Partner %(partner_name)s (%(partner_id)s) GSTIN is required under GST Treatment %(name)s",
+                    partner_name=shipping_partner.name,
+                    partner_id=shipping_partner.id,
+                    name=gst_treatment_name_mapping.get(move.l10n_in_gst_treatment)
+                ))
+            if self.journal_id.type == 'sale':
+                move.l10n_in_state_id = self._l10n_in_get_indian_state(shipping_partner)
+                if not move.l10n_in_state_id:
+                    move.l10n_in_state_id = self._l10n_in_get_indian_state(move.partner_id)
+                #still state is not set then assumed that transaction is local like PoS so set state of company unit
+                if not move.l10n_in_state_id:
+                    move.l10n_in_state_id = company_unit_partner.state_id
+        return posted