[ADD] estate: created a new module

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': 'Real Estate',
+    'depends': ['base'],
+    'data': [
+        'security/ir.model.access.csv',
+        'views/estate_property_views.xml',
+        'views/estate_property_type_views.xml',
+        'views/estate_property_tag_views.xml',
+        'views/estate_property_offer_views.xml',
+        'views/estate_menus.xml'
+    ],
+    'application': True,
+    'installable': True,
+    'author': 'Odoo S.A.',
+    'license': 'LGPL-3'
+}

estate/models/__init__.py

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

estate/models/estate_property.py

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+from dateutil.relativedelta import relativedelta
+
+from odoo import models, fields, api
+from odoo.exceptions import UserError
+from odoo.exceptions import ValidationError
+from odoo.tools.float_utils import float_compare, float_is_zero
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "Real Estate Property"
+
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date("Availability Date", default=fields.Date.today() + relativedelta(months=3))
+    expected_price = fields.Float("Expected Price", required=True)
+    selling_price = fields.Float("Selling Price", readonly=True)
+    bedrooms = fields.Integer(default=2)
+    living_area = fields.Integer("Living Area(sqm)")
+    facades = fields.Integer()
+    garage = fields.Boolean()
+    garden = fields.Boolean()
+    garden_area = fields.Integer("Garden Area(sqm)")
+    garden_orientation = fields.Selection(
+        selection=[
+            ("north", "North"),
+            ("south", "South"),
+            ("east", "East"),
+            ("west", "West"),
+        ],
+        string="Garden Orientation",
+    )
+    state = fields.Selection(
+        [
+            ("new", "New"),
+            ("offer_received", "Offer Received"),
+            ("offer_accepted", "Offer Accepted"),
+            ("sold", "Sold"),
+            ("cancelled", "Cancelled"),
+        ],
+        "Status",
+        required=True,
+        copy=False,
+        default="new",
+    )
+    active = fields.Boolean(default=True)
+    property_type_id = fields.Many2one("estate.property.type", "Property Type")
+    buyer_id = fields.Many2one("res.partner", "Buyer", copy=False)
+    salesperson_id = fields.Many2one(
+        "res.users", string="Salesperson")
+    tag_ids = fields.Many2many("estate.property.tag", "Tags")
+    offer_ids = fields.One2many("estate.property.offer", "property_id", "Offers")
+    total_area = fields.Integer("Total Area(sqm)", compute="_compute_total_area")
+    best_price = fields.Float("Best Offer", compute="_compute_best_price")
+
+    @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 _compute_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
+
+    @api.onchange('garden')
+    def _onchange_garden(self):
+        if self.garden:
+            self.garden_area = 10
+            self.garden_orientation = 'north'
+        else:
+            self.garden_area = 0
+            self.garden_orientation = False
+
+    def action_cancel(self):
+        for record in self:
+            if record.state == 'sold':
+                raise UserError("A sold property cannot be cancelled")
+            else:
+                self.state = 'cancelled'
+
+    def action_sold(self):
+        for record in self:
+            if record.state == 'cancelled':
+                raise UserError("A cancelled property cannot be set as sold")
+            else:
+                self.state = 'sold'
+
+    _check_expected_price = models.Constraint(
+        'CHECK(expected_price > 0)',
+        'The expected price of a property must be strictly positive.'
+    )
+
+    _check_selling_price = models.Constraint(
+        'CHECK(selling_price > 0)',
+        'The selling price of a property must be positive.'
+    )
+
+    @api.constrains('selling_price', 'expected_price')
+    def _check_selling_price(self):
+        for record in self:
+            if not float_is_zero(record.selling_price, precision_digits=2):
+                if float_compare(record.selling_price, record.expected_price * 0.9, precision_digits=2) < 0:
+                    raise ValidationError("The selling price cannot be lower than 90% of the expected price.")

estate/models/estate_property_offer.py

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+from dateutil.relativedelta import relativedelta
+
+from odoo import fields, models, api
+from odoo.exceptions import UserError
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Real Estate Property Offer"
+
+    price = fields.Float()
+    status = fields.Selection(
+        [("accepted", "Accepted"), ("refused", "Refused")],
+        copy=False,
+    )
+    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(days)", default=7)
+    date_deadline = fields.Date(string="Deadline Date", compute="_compute_date_deadline", inverse="_inverse_date_deadline")
+
+    @api.depends('validity')
+    def _compute_date_deadline(self):
+        for record in self:
+            creation_date = record.create_date or fields.Date.today()
+            record.date_deadline =  relativedelta(days=record.validity) +  creation_date
+
+    def _inverse_date_deadline(self):
+        for record in self:
+            creation_date = record.create_date or fields.Date.today()
+            record.validity = (record.date_deadline - fields.Date.to_date(creation_date)).days
+
+    def action_accept(self):
+        for record in self:
+            if record.property_id.buyer_id:
+                raise UserError("Property already accepted")
+            else:
+                record.status = 'accepted'
+                record.property_id.selling_price = record.price
+                record.property_id.state = 'offer_accepted'
+                record.property_id.buyer_id= record.partner_id
+
+    def action_refuse(self):
+        for record in self:
+            record.status = 'refused'
+        return True
+
+    _check_offer_price = models.Constraint(
+        'CHECK(price > 0)',
+        'The price of an offer must be strictly positive.'
+    )

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Real Estate Property Tag"
+
+    name = fields.Char(required=True)
+
+    _check_tag_name_unique = models.Constraint(
+    'UNIQUE(name)', 
+    'The name of the property tag must be unique.'
+    )

estate/models/estate_property_type.py

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+from odoo import fields, models
+
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Real Estate Property Type"
+
+    name = fields.Char(required=True)
+
+    _check_type_name_unique = models.Constraint(
+    'UNIQUE(name)', 
+    'The name of the property type must be unique.'
+    )

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,access_estate_property,estate.model_estate_property,base.group_user,1,1,1,1
+estate.access_estate_property_type,access_estate_property_type,estate.model_estate_property_type,base.group_user,1,1,1,1
+access_estate_property_tag,estate.property.tag.access,model_estate_property_tag,base.group_user,1,1,1,1
+access_estate_property_offer,estate.property.offer.access,model_estate_property_offer,base.group_user,1,1,1,1

estate/views/estate_menus.xml

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+<odoo>
+    <menuitem id="estate_menu_root" name="Real Estate" />
+
+    <menuitem id="menu_estate_advertisements"
+        name="Advertisements"
+        parent="estate_menu_root" />
+
+    <menuitem id="menu_estate_property_action"
+        name="Properties"
+        parent="menu_estate_advertisements"
+        action="action_estate_property" />
+
+    <menuitem id="menu_estate_settings"
+        name="Settings"
+        parent="estate_menu_root" />
+
+    <menuitem id="menu_estate_property_type_action_settings"
+        name="Property Types"
+        parent="menu_estate_settings"
+        action="estate_property_type_action" />
+
+    <menuitem id="menu_estate_property_tag_action_settings"
+        name="Property Tags"
+        parent="menu_estate_settings"
+        action="action_estate_property_tag" />
+</odoo>

estate/views/estate_property_offer_views.xml

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+<odoo>
+    <record id="estate_property_offer_tree_view" model="ir.ui.view">
+        <field name="name">estate.property.offer.list</field>
+        <field name="model">estate.property.offer</field>
+        <field name="arch" type="xml">
+            <list>
+                <field name="price" />
+                <field name="partner_id" />
+                <field name="status" />
+                <field name="validity" />
+                <field name="date_deadline" />
+                <button name="action_accept" type="object" string="Accept" icon="fa-check"/>
+                <button name="action_refuse" type="object" string="Refuse" icon="fa-times"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="estate_property_offer_form_view" model="ir.ui.view">
+        <field name="name">estate.property.offer.form</field>
+        <field name="model">estate.property.offer</field>
+        <field name="arch" type="xml">
+            <form>
+                <sheet>
+                    <group>
+                        <field name="price" />
+                        <field name="partner_id" />
+                        <field name="status" />
+                        <field name="validity" />
+                        <field name="date_deadline" />
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+</odoo>

estate/views/estate_property_tag_views.xml

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+<odoo>
+    <record id="action_estate_property_tag" model="ir.actions.act_window">
+        <field name="name">Property Tags</field>
+        <field name="res_model">estate.property.tag</field>
+        <field name="view_mode">list,form</field>
+    </record>
+</odoo>

estate/views/estate_property_type_views.xml

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+<odoo>
+    <record id="estate_property_type_action" model="ir.actions.act_window">
+        <field name="name">Property Types</field>
+        <field name="res_model">estate.property.type</field>
+        <field name="view_mode">list,form</field>
+    </record>
+</odoo>