[12.0][MIG] pos_tare w/ barcode

pos_tare/README.rst

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+====================
+Point Of Sale - Tare
+====================
+
+.. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/licence-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fpos-lightgray.png?logo=github
+    :target: https://github.com/OCA/pos/tree/12.0/pos_tare
+    :alt: OCA/pos
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/pos-12-0/pos-12-0-pos_tare
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runbot-Try%20me-875A7B.png
+    :target: https://runbot.odoo-community.org/runbot/184/12.0
+    :alt: Try me on Runbot
+
+|badge1| |badge2| |badge3| |badge4| |badge5| 
+
+Give the possibility to the user to enter a Tare weight, when weighting
+products in the Point of Sale.
+This will compute automatically net weight and set it to the current
+selected order
+
+.. figure:: https://raw.githubusercontent.com/OCA/pos/12.0/pos_tare/static/description/pos_tare.png
+
+The net weight is displayed in the order with the tare value below.
+
+.. figure:: https://raw.githubusercontent.com/OCA/pos/12.0/pos_tare/static/description/order.png
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Usage
+=====
+
+Install this add-on and configure your point of sale. To enable this addon, go to your point of sale configuration page. There, enable the electronic scale and barcode reader in the "IoT Box" section. In the same page, look up for the "Tare input method" field, and choose a tare method. There are three tare methods:
+- "manual", you'll set the tare value when you weight the product;
+- "barcode", you'll scan the tare value from a barcode;
+- "both", you can both of the above.
+
+To generate a tare barcode you need to use the default barcode nomenclature. The default barcode pattern is `0700000{NNDDD}`. Using that pattern, the barcode for a tare of 0.1kg is `0700000001006`. The `pos_tare_barcode_generator` allows you to create tare labels right from the POS.
+
+Known issues / Roadmap
+======================
+
+- Print tare value on customer receipt.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/pos/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us smashing it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/pos/issues/new?body=module:%20pos_tare%0Aversion:%2012.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+~~~~~~~
+
+* GRAP
+* Le Nid
+
+Contributors
+~~~~~~~~~~~~
+
+- Sylvain LE GAL (https://www.twitter.com/legalsylvain)
+- Le Nid
+- CoopITEasy
+
+
+Maintainers
+~~~~~~~~~~~
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+.. |maintainer-fkawala| image:: https://github.com/fkawala.png?size=40px
+    :target: https://github.com/fkawala
+    :alt: fkawala
+
+Current `maintainer <https://odoo-community.org/page/maintainer-role>`__:
+
+|maintainer-fkawala| 
+
+This module is part of the `OCA/pos <https://github.com/OCA/pos/tree/12.0/pos_tare>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

pos_tare/__init__.py

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+from . import models

pos_tare/__manifest__.py

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+# @author: François Kawala
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+{
+    "name": "Point Of Sale - Tare",
+    "summary": "Manage Tare in Point Of Sale module",
+    "version": "12.0.1.0.0",
+    "category": "Point of Sale",
+    "author": "GRAP, Le Nid, Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/pos",
+    "license": "AGPL-3",
+    "maintainers": ["fkawala", "legalsylvain"],
+    "depends": [
+        "point_of_sale",
+    ],
+    "data": [
+        "views/templates.xml",
+        "views/view_pos_config.xml",
+        "views/view_pos_order.xml",
+        "data/barcode_rule.xml",
+    ],
+    "qweb": [
+        "static/src/xml/pos_tare.xml",
+    ],
+    "installable": True,
+}

pos_tare/data/barcode_rule.xml

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+<?xml version="1.0"?>
+
+<odoo noupdate="1">
+    <record id="barcode_rule_tare" model="barcode.rule">
+        <field name="name">Tare</field>
+        <field name="barcode_nomenclature_id" ref="barcodes.default_barcode_nomenclature"/>
+        <field name="sequence">81</field>
+        <field name="type">tare</field>
+        <field name="encoding">ean13</field>
+        <field name="pattern">0700000{NNDDD}</field>
+    </record>
+</odoo>

pos_tare/models/__init__.py

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+from . import pos_config
+from . import pos_order_line
+from . import barcode_rule

pos_tare/models/barcode_rule.py

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+from odoo import models, fields
+
+
+class BarcodeRule(models.Model):
+    _inherit = 'barcode.rule'
+
+    type = fields.Selection(selection_add=[
+        ('tare', 'Tare')
+    ])

pos_tare/models/pos_config.py

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+from odoo import api, models, fields
+
+
+class PosConfig(models.Model):
+    _inherit = "pos.config"
+
+    iface_tare_method = fields.Selection(
+        [
+            ("manual", "Input the tare manually"),
+            ("barcode", "Scan a barcode to set the tare"),
+            ("both", "Manual input and barcode"),
+        ],
+        string="Tare Input Method",
+        default="both",
+        required=True,
+        help="Select tare method:\n"
+        "* 'manual' : the scale screen has an extra tare input field;\n"
+        "* 'barecode' : (scan a barcode to tare the selected order line;\n"
+        "* 'both' : manual input and barcode methods are enabled;",
+    )
+
+    iface_gross_weight_method = fields.Selection(
+        [
+            ("manual", "Input the Gross Weight manually"),
+            ("scale", "Input Gross Weight via Scale")
+        ],
+        string="Gross Weight Input Method",
+        default="scale",
+        required=True,
+    )
+
+    iface_tare_uom_id = fields.Many2one(
+        string="Unit of Measure of the tare",
+        comodel_name="uom.uom",
+        default=lambda s: s._default_iface_tare_uom_id(),
+        required=True,
+    )
+
+    @api.model
+    def _default_iface_tare_uom_id(self):
+        return self.env.ref("uom.product_uom_kgm")

pos_tare/models/pos_order_line.py

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+# Copyright (C) 2020-Today: GRAP (<http://www.grap.coop/>)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from odoo import models, fields
+from odoo.addons import decimal_precision as dp
+
+
+class PosOrderLine(models.Model):
+    _inherit = "pos.order.line"
+
+    tare = fields.Float(
+        string="Tare",
+        digits=dp.get_precision("Product Unit of Measure")
+    )

pos_tare/readme/CONTRIBUTORS.rst

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+- Sylvain LE GAL (https://www.twitter.com/legalsylvain)
+- Le Nid
+- CoopITEasy

pos_tare/readme/DESCRIPTION.rst

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+Give the possibility to the user to enter a Tare weight, when weighting
+products in the Point of Sale.
+This will compute automatically net weight and set it to the current
+selected order
+
+.. figure:: ../static/description/pos_tare.png
+
+The net weight is displayed in the order with the tare value below.
+
+.. figure:: ../static/description/order.png

pos_tare/readme/USAGE.rst

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+Install this add-on and configure your point of sale. To enable this addon, go to your point of sale configuration page. There, enable the electronic scale and barcode reader in the "IoT Box" section. In the same page, look up for the "Tare input method" field, and choose a tare method. There are three tare methods:
+- "manual", you'll set the tare value when you weight the product;
+- "barcode", you'll scan the tare value from a barcode;
+- "both", you can both of the above.
+
+To generate a tare barcode you need to use the default barcode nomenclature. The default barcode pattern is `0700000{NNDDD}`. Using that pattern, the barcode for a tare of 0.1kg is `0700000001006`. The `pos_tare_barcode_generator` allows you to create tare labels right from the POS.