[ADD] rma_sale_mrp: New module to refund kits

rma_sale_mrp/models/rma.py

@@ -0,0 +1,65 @@
+# Copyright 2020 Tecnativa - David Vidal
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from odoo import _, fields, models
+from odoo.exceptions import UserError
+import odoo.addons.decimal_precision as dp
+
+
+class Rma(models.Model):
+    _inherit = "rma"
+
+    phantom_bom_product = fields.Many2one(
+        comodel_name="product.product",
+        string="Related kit product",
+        readonly=True,
+    )
+    kit_qty = fields.Float(
+        string="Kit quantity",
+        digits=dp.get_precision("Product Unit of Measure"),
+        readonly=True,
+        help="To how many kits this components corresponds to. Used mainly "
+             "for refunding the right quantity",
+    )
+    rma_kit_register = fields.Char(readonly=True)
+
+    def _get_refund_line_quantity(self):
+        """Refund the kit, not the component"""
+        if self.phantom_bom_product:
+            uom = (
+                self.sale_line_id.product_uom
+                or self.phantom_bom_product.uom_id
+            )
+            return (self.kit_qty, uom)
+        return (self.product_uom_qty, self.product_uom)
+
+    def action_refund(self):
+        """We want to process them altogether"""
+        phantom_rmas = self.filtered("phantom_bom_product")
+        phantom_rmas |= self.search([
+            ("rma_kit_register", "in", phantom_rmas.mapped("rma_kit_register")),
+            ("id", "not in", phantom_rmas.ids),
+        ])
+        self -= phantom_rmas
+        for rma_kit_register in phantom_rmas.mapped(
+                "rma_kit_register"):
+            # We want to avoid refunding kits that aren't completely processed
+            rmas_by_register = phantom_rmas.filtered(
+                lambda x: x.rma_kit_register == rma_kit_register)
+            if any(rmas_by_register.filtered(lambda x: x.state != "received")):
+                raise UserError(_(
+                    "You can't refund a kit in wich some RMAs aren't received"
+                ))
+            self |= rmas_by_register[0]
+        super().action_refund()
+        # We can just link the line to an RMA but we can link several RMAs
+        # to one invoice line.
+        for rma_kit_register in set(phantom_rmas.mapped("rma_kit_register")):
+            grouped_rmas = phantom_rmas.filtered(
+                lambda x: x.rma_kit_register == rma_kit_register)
+            lead_rma = grouped_rmas.filtered("refund_line_id")
+            grouped_rmas -= lead_rma
+            grouped_rmas.write({
+                "refund_line_id": lead_rma.refund_line_id.id,
+                "refund_id": lead_rma.refund_id.id,
+                "state": "refunded",
+            })