[ADD] estate: adding a new real estate module

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': "Real Estate",
+    'depends': ['base'],
+    'application': True,
+    'data':[
+        'security/ir.model.access.csv',
+        'views/estate_property_views.xml',
+        'views/estate_property_type_menu.xml',
+        'views/estate_property_tag_menu.xml',
+        'views/estate_menus.xml',
+    ],
+    'license': 'LGPL-3'
+}

estate/models/__init__.py

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+from . import estate_property_offer
+from . import estate_property_tag
+from . import estate_property_type
+from . import estate_property

estate/models/estate_property.py

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+from odoo import api, fields, models
+from odoo.exceptions import ValidationError
+from dateutil.relativedelta import relativedelta
+from odoo.tools import float_compare, float_is_zero
+
+class PropertyPlan(models.Model):
+    _name = "estate.property"
+    _description = "Estate property tables"
+
+    @api.depends("living_area", "garden_area")
+    def _compute_total_area(self):
+        for record in self:
+            record.total_area = record.living_area + record.garden_area
+
+    @api.depends("offer_ids.price")
+    def _computer_best_price(self):
+        for record in self:
+            if record.offer_ids:
+                record.best_price = max(record.offer_ids.mapped("price"))
+            else:
+                record.best_price = 0.0
+
+    @api.onchange("garden")
+    def _onchange_garden(self):
+        if self.garden:
+            self.garden_area = 10
+            self.garden_orientation = "north"
+        else:
+            self.garden_area = 00
+            self.garden_orientation = ""
+
+    def action_property_cancelled(self):
+        for record in self:
+            if record.state == "cancelled":
+                raise ValidationError("Already cancelled.")
+            elif record.state == "sold":
+                raise ValidationError("Cannot cancel a sold property!")
+            else:
+                record.state = "cancelled"
+        return True
+
+    def action_property_sold(self):
+        for record in self:
+            if record.state == "sold":
+                raise ValidationError("Already sold.")
+            elif record.state == "cancelled":
+                raise ValidationError("Cannot sell a cancelled property!")
+            else:
+                record.state = "sold"
+        return True
+
+    _sql_constraints = [
+        (
+            "check_expected_price",
+            "CHECK(expected_price > 0)",
+            "Expected price must be strictly positive!",
+        ),
+        (
+            "check_selling_price",
+            "CHECK(selling_price > 0)",
+            "Selling price must be positive!",
+        ),
+    ]
+
+    @api.constrains("selling_price", "expected_price")
+    def check_selling_price(self):
+        for price in self:
+            if float_is_zero(price.selling_price, 2) != 1:
+                if (
+                    float_compare(price.expected_price * 0.9, price.selling_price, 2)
+                    == 1
+                ):
+                    raise ValidationError(
+                        "The selling price must be at least 90% of the expected price!You must reduce the expected price if you want to accept this offer."
+                    )
+
+    name = fields.Char(string="Title", required=True)
+    description = fields.Text(string="Description")
+    postcode = fields.Char(string="Postcode")
+    date_availability = fields.Date(
+        string="Available From",
+        copy=False,
+        default=(fields.Date.today() + relativedelta(months=+3)),
+    )
+    expected_price = fields.Float(string="Expected Price", required=True)
+    selling_price = fields.Float(string="Selling Price", readonly=True)
+    bedrooms = fields.Integer(string="Bedrooms", default=2)
+    living_area = fields.Integer(string="Living Area (sqm)")
+    facades = fields.Integer(string="Facades")
+    garage = fields.Boolean(string="Garage")
+    garden = fields.Boolean(string="Garden")
+    garden_area = fields.Integer(string="Garden Area (sqm)")
+    active = fields.Boolean(string="Active", default=True)
+    state = fields.Selection(
+        string="State",
+        required=True,
+        default="new",
+        copy=False,
+        selection=[
+            ("new", "New"),
+            ("offer_received", "Offer Received"),
+            ("offer_accepted", "Offer Accepted"),
+            ("sold", "Sold"),
+            ("cancelled", "Cancelled"),
+        ],
+        help="Used to decide the state of Garden",
+    )
+    garden_orientation = fields.Selection(
+        string="Garden Orientation",
+        selection=[
+            ("north", "North"),
+            ("south", "South"),
+            ("east", "East"),
+            ("west", "West"),
+        ],
+        help="Used to decide the direction of Garden",
+    )
+    property_type_id = fields.Many2one("estate.property.type", string="Property Type")
+    tag = fields.Many2many("estate.property.tag", string="Property Tag")
+    partner_id = fields.Many2one("res.partner", string="Buyer", copy=False)
+    sales_person = fields.Many2one(
+        "res.users", string="Salesman", default=lambda self: self.env.user
+    )
+    offer_ids = fields.One2many("estate.property.offer", "property_id", string="Price")
+    total_area = fields.Float(string="Total Area (sqm)", compute="_compute_total_area")
+    best_price = fields.Float(string="Best Offer", compute="_computer_best_price")

estate/models/estate_property_offer.py

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+from odoo import api, fields, models
+from odoo.exceptions import ValidationError
+from dateutil.relativedelta import relativedelta
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Offer list for estate properties"
+
+    @api.depends("validity", "create_date")
+    def _compute_date_deadline(self):
+        for record in self:
+            if record.create_date:
+                record.date_deadline = record.create_date + relativedelta(
+                    days=record.validity
+                )
+            else:
+                record.date_deadline = fields.Date.today() + relativedelta(
+                    days=record.validity
+                )
+
+    def _inverse_date_deadline(self):
+        for record in self:
+            if record.date_deadline:
+                record.validity = (record.date_deadline - fields.Date.today()).days
+            else:
+                record.validity = 7
+
+    def action_confirm(self):
+        for record in self:
+            if record.status == "accepted":
+                raise ValidationError("Already accepted.")
+            else:
+                record.status = "accepted"
+                record.property_id.partner_id = record.partner_id
+                record.property_id.selling_price = record.price
+                other_offers = self.search(
+                    [
+                        ("property_id", "=", record.property_id.id),
+                        ("id", "!=", record.id),
+                        "|",
+                        ("status", "=", ""),
+                        ("status", "=", "accepted"),
+                    ]
+                )
+            other_offers.write({"status": "refused"})
+        return True
+
+    def action_refuse(self):
+        for record in self:
+            if record.status == "refused":
+                raise ValidationError("Already refused.")
+            else:
+                record.status = "refused"
+        return True
+
+    _sql_constraints = [
+        ("check_price", "CHECK(price > 0)", "Price must be positive."),
+    ]
+
+    price = fields.Float(string="Price")
+    status = fields.Selection(
+        string="Status",
+        copy=False,
+        selection=[("accepted", "Accepted"), ("refused", "Refused")],
+        readonly=True,
+        help="Status of the offer",
+    )
+    partner_id = fields.Many2one("res.partner", string="Partner", required=True)
+    property_id = fields.Many2one("estate.property", string="Property", required=True)
+    validity = fields.Integer(string="Validity", default="7")
+    date_deadline = fields.Date(
+        string="Deadline",
+        compute="_compute_date_deadline",
+        inverse="_inverse_date_deadline",
+    )

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Estate Property Tags"
+
+    _sql_constraints = [
+        ("name_unique", "unique(name)", "Name must be unique!"),
+    ]
+
+    name = fields.Char(string="Tag", required=True)

estate/models/estate_property_type.py

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+from odoo import fields, models
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Estate Property Types"
+
+    name = fields.Char(string="Property Type", required=True)

estate/security/ir.model.access.csv

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+id,name,model_id/id,group_id/id,perm_read,perm_write,perm_create,perm_unlink
+estate.access_estate_property,estate.access_estate_property,estate.model_estate_property,base.group_user,1,1,1,1
+estate.access_estate_property_type,estate.access_estate_property_type,estate.model_estate_property_type,base.group_user,1,1,1,1
+estate.access_estate_property_tag,estate.access_estate_property_tag,estate.model_estate_property_tag,base.group_user,1,1,1,1
+estate.access_estate_property_offer,estate.access_estate_property_offer,estate.model_estate_property_offer,base.group_user,1,1,1,1

estate/views/estate_menus.xml

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+<odoo>
+    <menuitem id="estate_property_root_menu" name="Estate Property">
+        <menuitem id="estate_property_advertisements_menu" name="Advertisements">
+            <menuitem id="estate_property_menu_action" name="Advertisements" action="estate_property_action"/>
+        </menuitem>
+        <menuitem id="estate_property_settings_menu" name="Settings">
+            <menuitem id="estate_property_type_menu" name="Property Types" action="estate_property_type_action"/>
+            <menuitem id="estate_property_tag_menu" name="Property Tags" action="estate_property_tag_action"/>
+        </menuitem>
+    </menuitem>
+</odoo>

estate/views/estate_property_tag_menu.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="estate_property_tag_action" model="ir.actions.act_window">
+        <field name="name">Estate Property Tag</field>
+        <field name="res_model">estate.property.tag</field>
+        <field name="view_mode">list,form</field>
+    </record>
+</odoo>

estate/views/estate_property_type_menu.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="estate_property_type_action" model="ir.actions.act_window">
+        <field name="name">Estate Property Type</field>
+        <field name="res_model">estate.property.type</field>
+        <field name="view_mode">list,form</field>
+    </record>
+    <record id="estate_property_type_view_form" model="ir.ui.view">
+        <field name="name">estate.property.type.view.form</field>
+        <field name="model">estate.property.type</field>
+        <field name="arch" type="xml">
+            <form string="Estate Property Type Form">
+                <sheet>
+                    <group>
+                        <group>
+                            <h1 class="mb32">
+                                <field name="name" class="mb16" />
+                            </h1>
+                        </group>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+</odoo>