[ADD] estate: new module to manage estate

estate/__init__.py

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+from . import models

estate/__manifest__.py

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

estate/models/__init__.py

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

estate/models/estate_property.py

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+from datetime import datetime
+from dateutil.relativedelta import relativedelta
+
+from odoo import _, api, fields, models
+from odoo.exceptions import UserError, ValidationError
+from odoo.tools.float_utils import float_compare, float_is_zero
+
+
+class EstateProperty(models.Model):
+    _name = 'estate.property'
+    _description = "Real Estate Property"
+
+    _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 strictly positive.")
+    ]
+
+    name = fields.Char(string="Title", required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(copy=False, default=lambda self: datetime.today() + relativedelta(months=3))
+    expected_price = fields.Float(required=True)
+    selling_price = fields.Float(readonly=True, copy=False)
+    bedrooms = fields.Integer(default=2)
+    living_area = fields.Integer(string="Living Area (sqm)")
+    facades = fields.Integer(string="Facade")
+    garage = fields.Boolean()
+    garden = fields.Boolean()
+    garden_area = fields.Integer(string="Garden Area (sqm)")
+    garden_orientation = fields.Selection(
+        selection=[
+            ('north', "North"),
+            ('south', "South"),
+            ('east', "East"),
+            ('west', "West"),
+        ],
+        string="Garden Orientation"
+    )
+    available = fields.Boolean(default=True)
+    property_type_id = fields.Many2one("estate.property.type", string="Property Type")
+    salesman_id = fields.Many2one("res.users", string="Salesman", default=lambda self: self.env.user)
+    buyer_id = fields.Many2one("res.partner", string="Buyer")
+    tag_ids = fields.Many2many("estate.property.tag", string="Tags")
+    offer_ids = fields.One2many("estate.property.offer", "property_id", string="Offers")
+    state = fields.Selection(
+        selection=[
+            ('new', "New"),
+            ('offer_received', "Received"),
+            ('offer_accepted', "Accepted"),
+            ('sold', "Sold"),
+            ('cancelled', "Cancelled"),
+            ('refused', "Refused")
+        ],
+        required=True,
+        copy=False,
+        default='new'
+    )
+    note = fields.Text(string="Special mention about the property.")
+    total_area = fields.Integer(string="Total Area (sqm)", compute="_compute_total_area")
+    best_offer = fields.Float(string="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:
+            record.best_offer = max(record.offer_ids.mapped("price"), default=0.0)
+
+    @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 = None
+
+    def cancel_property_button(self):
+        for record in self:
+            if record.state != 'sold':
+                record.state = 'cancelled'
+            else:
+                raise UserError(_("You cannot cancel a sold property."))
+
+    def sold_property_button(self):
+        for record in self:
+            if record.state != 'cancelled':
+                record.state = 'sold'
+            else:
+                raise UserError("You cannot sell a cancelled property.")
+
+    @api.constrains('expected_price')
+    def _check_expected_price_positive(self):
+        for record in self:
+            if record.expected_price <= 0:
+                raise ValidationError("Expected price must be strictly positive.")
+
+    @api.constrains('selling_price', 'expected_price')
+    def _check_selling_price_margin(self):
+        for record in self:
+            if float_is_zero(record.selling_price, precision_digits=2):
+                continue
+            min_acceptable_price = record.expected_price * 0.9
+            if float_compare(record.selling_price, min_acceptable_price, precision_digits=2) < 0:
+                raise ValidationError("The selling price cannot be lower than 90% of the expected price.")
+
+    @api.ondelete(at_uninstall=False)
+    def unlink(self):
+        for record in self:
+            if record.state not in ['new', 'cancelled']:
+                raise UserError("YOU CANNOT DELETE A PROPERTY THAT IS NOT IN NEW OR CANCELLED STATUS. REVERT!")
+        return super().unlink()

estate/models/estate_property_offer.py

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+from datetime import timedelta
+
+from odoo import api, fields, models, exceptions
+from odoo.exceptions import UserError
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Estate property offer"
+
+    price = fields.Float()
+    status = fields.Selection(
+        selection=[
+            ('accepted', "Accepted"),
+            ('refused', "Refused")
+        ],
+        copy=False
+    )
+    partner_id = fields.Many2one("res.partner", required=True)
+    property_id = fields.Many2one("estate.property", required=True)
+    validity = fields.Integer(default=7)
+    deadline = fields.Date(string="Deadline", compute="_compute_deadline", inverse="_inverse_deadline")
+    creation_date = fields.Datetime("Creation Date", readonly=True)
+
+    @api.depends("validity")
+    def _compute_deadline(self):
+        for record in self:
+            if record.creation_date:
+                creation_date = fields.Datetime.from_string(record.creation_date)
+                record.deadline = creation_date.date() + timedelta(days=record.validity)
+
+    def _inverse_deadline(self):
+        for record in self:
+            if record.deadline:
+                if record.creation_date:
+                    creation_date = fields.Datetime.from_string(record.creation_date)
+                    record.validity = (record.deadline - creation_date.date()).days
+
+    def offer_accept(self):
+        if 'accepted' in self.mapped("property_id.offer_ids.status"):
+            raise UserError("An offer is already accepted.")
+        for record in self:
+            record.status = 'accepted'
+            record.property_id.state = 'offer_accepted'
+            record.property_id.buyer_id = record.partner_id
+            record.property_id.selling_price = record.price
+
+    def offer_refuse(self):
+        for record in self:
+            record.status = 'refused'
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            property_id = vals.get('property_id')
+            price = vals.get('price', default=0.0)
+
+            if property_id and price is not None:
+                property_rec = self.env['estate.property'].browse(property_id)
+                if property_rec.best_offer > price:
+                    raise exceptions.UserError("Cannot add offer for a lower amount than current offer")
+                else:
+                    property_rec.state = "offer_received"
+
+        return super().create(vals_list)

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+
+class estate_property_tag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Estate property tag file"
+
+    name = fields.Char('Name', required=True)
+    color = fields.Integer()

estate/models/estate_property_type.py

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+from odoo import api, fields, models
+
+
+class estate_property_type(models.Model):
+    _name = "estate.property.type"
+    _description = "Property type models file"
+    _order = "name"
+
+    _sql_constraints = [
+        ('unique_type_name', 'UNIQUE(name)', 'The name should be unique')
+    ]
+
+    name = fields.Char("Name", required=True)
+    property_id = fields.One2many("estate.property", "property_type_id")
+    offer_counts = fields.Integer(compute="_compute_offer_count")
+
+    @api.depends("property_id.offer_ids")
+    def _compute_offer_count(self):
+        for record in self:
+            record.offer_counts = len(record.property_id.offer_ids)

estate/models/res_users.py

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+from odoo import fields, models
+
+
+class res_users(models.Model):
+    _inherit = 'res.users'
+
+    property_ids = fields.One2many('estate.property', "salesman_id", domain="('state','=','new'),('state','=','offer_received')")

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
+"estate.access_estate_property_offer","access_estate_property_offer","estate.model_estate_property_offer","base.group_user",1,1,1,1
+"estate.access_estate_property_tag","access_estate_property_tag","estate.model_estate_property_tag","base.group_user",1,1,1,1

estate/views/estate_menus.xml

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+<?xml version="1.0"?>
+<odoo>
+    <menuitem id="estate_menu_root" name="Estate">
+        <menuitem id="estate_menu_advertissements" name="Advertissement">
+            <menuitem id="estate_menu_properties" name="Property" action="estate_property_action"/>
+            <menuitem id="estate_menu_properties_offer" name="Offers" action="estate_property_offer_view"/>
+        </menuitem>
+
+        <menuitem id="estate_menu_settings" name="Settings" sequence="20">
+            <menuitem id="estate_menu_properties_type" name="Property Type" action="estate_property_type_view"/>
+            <menuitem id="estate_menu_properties_tags" name="Property Tags" action="estate_property_tag_action"/>
+        </menuitem>
+    </menuitem>
+</odoo>

estate/views/estate_property_offer_views.xml

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+<?xml version="1.0"?>
+<odoo>
+    <record id="estate_property_offer_view_form" 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 string="Estate Property Offers">
+                <sheet>
+                    <group>
+                        <field name="property_id"/>
+                        <h1>
+                            <field name="price"/>
+                        </h1>
+                        <field name="price"/>
+                        <field name="partner_id"/>
+                        <field name="validity"/>
+                        <field name="deadline"/>
+                        <field name="status"/>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+        <record id="estate_property_offer_view_list" 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 string="Channel" editable="top"
+				decoration-success="status == 'accepted'"
+				decoration-danger="status=='refused'">
+                <field name="price"/>
+                <field name="partner_id"/>
+                <field name="validity"/>
+                <field name="deadline"/>
+                <button name="offer_accept" type="object" title="Accept" icon="fa-check" invisible="status != False"/>
+                <button name="offer_refuse" type="object" title="Refused" icon="fa-times" invisible="status != False"/>
+            </list>
+        </field>
+    </record>
+    <record id="estate_property_offer_view" model="ir.actions.act_window">
+        <field name="name">Estate Properties Offers</field>
+        <field name="res_model">estate.property.offer</field>
+        <field name="view_mode">list,form</field>
+    </record>
+</odoo>

estate/views/estate_property_tag_views.xml

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+<odoo>
+    <record id="estate_property_tag_view_list" model="ir.ui.view">
+		<field name="name">estate.property.tag.view.list</field>
+		<field name="model">estate.property.tag</field>
+		<field name="arch" type="xml">
+			<list string="Tag List" editable="top">
+				<field name="name"/>
+                <field name="color" widget="color_picker"/>
+			</list>
+		</field>
+	</record>
+    <record id="estate_property_tag_action" model="ir.actions.act_window">
+        <field name="name">Estate Properties 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_view_form" model="ir.ui.view">
+        <field name="name">estate.property.type.form</field>
+        <field name="model">estate.property.type</field>
+        <field name="arch" type="xml">
+            <form string="Estate Property Type">
+                <sheet>
+                    <header>
+						<button type="action"
+							name="%(estate_property_offer_view)d"
+							class="oe_stat_button"
+							icon="fa-money">
+							<div><field name="offer_counts" /> Offers </div>
+						</button>
+					</header>
+					<group>
+						<field name="name" />
+					</group>
+                    <notebook>
+						<page string="Properties">
+							<field name="property_id">
+								<list>
+									<field name="name" />
+									<field name="expected_price" />
+									<field name="state" />
+								</list>
+							</field>
+						</page>
+					</notebook>
+                </sheet>
+            </form>
+        </field>
+    </record>
+    <record id="estate_property_type_view" 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>