[ADD] Estate: Add 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_views.xml',
+        'views/estate_property_tag_views.xml',
+        'views/estate_property_offer_views.xml',
+        'views/estate_property_maintenance_views.xml',
+        'views/estate_menus.xml',
+        'data/data_type.xml',
+        'data/data_tags.xml',
+        'data/data.xml',
+    ],
+}

estate/data/data.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="estate_property_list_view_demo_1" model="estate.property">
+        <field name="name">ABC Ltd</field>
+        <field name="property_type_id" ref="estate_property_type_1"/>
+        <field name="tag_ids" eval="[(6, 0, [ref('estate_property_tag_1')])]"/>
+        <field name="postcode">123345</field>
+        <field name="bedrooms">2</field>
+        <field name="living_area">135765</field>
+        <field name="expected_price">5820000</field>
+        <field name="selling_price">0</field>
+        <field name="date_availability" eval="(datetime.today() + relativedelta(months=3)).strftime('%Y-%m-%d')"/>
+    </record>
+
+    <record id="estate_property_list_view_demo_2" model="estate.property">
+        <field name="name">XYZ Pvt Ltd</field>
+        <field name="property_type_id" ref="estate_property_type_2"/>
+        <field name="tag_ids" eval="[(6, 0, [ref('estate_property_tag_1')])]"/>
+        <field name="postcode">7865445</field>
+        <field name="bedrooms">4</field>
+        <field name="living_area">100000</field>
+        <field name="expected_price">200000</field>
+        <field name="selling_price">0</field>
+        <field name="date_availability" eval="(datetime.today() + relativedelta(months=3)).strftime('%Y-%m-%d')"/>
+    </record>
+
+    <record id="estate_property_list_view_demo_3" model="estate.property">
+        <field name="name">Umbrella Corp</field>
+        <field name="property_type_id" ref="estate_property_type_4"/>
+        <field name="tag_ids" eval="[(6, 0, [ref('estate_property_tag_3')])]"/>
+        <field name="postcode">908765</field>
+        <field name="bedrooms">3</field>
+        <field name="living_area">100000</field>
+        <field name="expected_price">700000</field>
+        <field name="selling_price">0</field>
+        <field name="date_availability" eval="(datetime.today() + relativedelta(months=3)).strftime('%Y-%m-%d')"/>
+    </record>
+
+</odoo>

estate/data/data_tags.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="estate_property_tag_1" model="estate.property.tag">
+        <field name="name">Cozy</field>
+    </record>
+    <record id="estate_property_tag_2" model="estate.property.tag">
+        <field name="name">Furnished</field>
+    </record>
+    <record id="estate_property_tag_3" model="estate.property.tag">
+        <field name="name">Renovated</field>
+    </record>
+    <record id="estate_property_tag_4" model="estate.property.tag">
+        <field name="name">Unfurnished</field>
+    </record>
+    <record id="estate_property_tag_5" model="estate.property.tag">
+        <field name="name">Semi-furnished</field>
+    </record>
+</odoo>

estate/data/data_type.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="estate_property_type_1" model="estate.property.type">
+        <field name="name">House</field>
+    </record>
+    <record id="estate_property_type_2" model="estate.property.type">
+        <field name="name">Apartment</field>
+    </record>
+    <record id="estate_property_type_3" model="estate.property.type">
+        <field name="name">Penthouse</field>
+    </record>
+    <record id="estate_property_type_4" model="estate.property.type">
+        <field name="name">Villa</field>
+    </record>
+    <record id="estate_property_type_5" model="estate.property.type">
+        <field name="name">Boat House</field>
+    </record>
+    <record id="estate_property_type_6" model="estate.property.type">
+        <field name="name">Mansion</field>
+    </record>
+</odoo>

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
+from . import estate_property_maintenance

estate/models/estate_property.py

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+from datetime import timedelta
+
+from odoo import api, fields, models
+from odoo.exceptions import UserError
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "Real Estate Property"
+
+    # SQL Constraints
+    # Expected price must be strictly positive
+    _check_expected_price = models.Constraint(
+        'CHECK(expected_price > 0)',
+        'The expected price must be strictly positive.',
+    )
+    # Selling price must be positive
+    _check_selling_price = models.Constraint(
+        'CHECK(selling_price >= 0)',
+        'The selling price must be positive.',
+    )
+
+    def _default_availability_date(self):
+        return fields.Date.today() + timedelta(days=90)
+
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    property_type_id = fields.Many2one(
+        "estate.property.type",
+        string="Property Type",
+    )
+    tag_ids = fields.Many2many(
+        "estate.property.tag",
+        string="Tags",
+    )
+    buyer_id = fields.Many2one(
+        "res.partner",
+        string="Buyer",
+        copy=False,
+    )
+    salesperson_id = fields.Many2one(
+        "res.users",
+        string="Salesperson",
+        default=lambda self: self.env.user,
+    )
+    offer_ids = fields.One2many(
+        "estate.property.offer",
+        "property_id",
+        string="Offers",
+    )
+    maintenance_ids = fields.One2many(
+        "estate.property.maintenance",
+        "property_id",
+        string="Maintenance",
+    )
+    date_availability = fields.Date(
+        copy=False,
+        default=lambda self: fields.Datetime.now() + timedelta(days=90),
+    )
+    expected_price = fields.Float(required=True)
+    selling_price = fields.Float(
+        readonly=True,
+        copy=False,
+    )
+    bedrooms = fields.Integer(
+        default=2,
+    )
+    facades = fields.Integer()
+    garage = fields.Boolean()
+    living_area = fields.Integer()
+    garden = fields.Boolean()
+    garden_area = fields.Integer()
+    total_area = fields.Integer(
+        compute="_compute_total_area",
+    )
+    best_price = fields.Float(
+        compute="_compute_best_price",
+    )
+    garden_orientation = fields.Selection([
+        ('north', 'North'),
+        ('south', 'South'),
+        ('east', 'East'),
+        ('west', 'West'),
+    ])
+    active = fields.Boolean(
+        default=True,
+    )
+    state = fields.Selection(
+        [
+            ('new', 'New'),
+            ('offer_received', 'Offer Received'),
+            ('offer_accepted', 'Offer Accepted'),
+            ('sold', 'Sold'),
+            ('cancelled', 'Cancelled'),
+        ],
+        required=True,
+        copy=False,
+        default='new',
+        readonly=True,
+    )
+
+    @api.depends("living_area", "garden_area")
+    def _compute_total_area(self):
+        for property in self:
+            property.total_area = (
+                property.living_area +
+                property.garden_area
+            )
+
+    @api.depends("offer_ids.price")
+    def _compute_best_price(self):
+        for property in self:
+            prices = property.offer_ids.mapped("price")
+            property.best_price = max(prices) if prices else 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 = False
+
+    # Mark the property as sold
+    def action_sold(self):
+        for property in self:
+            # A cancelled property cannot be sold
+            if property.state == "cancelled":
+                raise UserError(
+                    "Cancelled properties cannot be sold."
+                )
+            property.state = "sold"
+        return True
+
+    # Mark the property as cancelled
+    def action_cancel(self):
+        for property in self:
+            # A sold property cannot be cancelled
+            if property.state == "sold":
+                raise UserError(
+                    "Sold properties cannot be cancelled."
+                )
+            property.state = "cancelled"
+        return True

estate/models/estate_property_maintenance.py

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+from datetime import timedelta
+
+from odoo import api, fields, models
+from odoo.exceptions import UserError
+
+
+class EstatePropertyMaintenance(models.Model):
+    _name = "estate.property.maintenance"
+    _description = "Real Estate Property Maintenance"
+
+    title = fields.Char(required=True)
+    problem = fields.Char()
+    technician_id = fields.Many2one(
+        "res.partner",
+        string="Technician",
+    )
+    requested_by = fields.Many2one(
+        "res.users",
+        string="Requested By",
+        default=lambda self: self.env.user,
+    )
+    estimated_cost = fields.Float()
+    actual_cost = fields.Float()
+    property_id = fields.Many2one(
+        "estate.property",
+        required=True,
+    )
+    priority = fields.Selection(
+        [
+            ("high", "High"),
+            ("medium", "Medium"),
+            ("low", "Low"),
+        ]
+    )
+    assigned_date = fields.Date(
+        default=lambda self: fields.Datetime.now()
+    )
+    completion_date = fields.Date()
+    state = fields.Selection(
+        [
+            ("new", "New"),
+            ("started", "Started"),
+            ("in_progress", "In Progress"),
+            ("completed", "Completed"),
+        ],
+        string="Status",
+        default="new",
+        required=True,
+    )
+
+    def write(self, vals):
+        if "state" in vals:
+            if vals["state"] == "completed":
+                vals["completion_date"] = fields.Date.today()
+            else:
+                vals["completion_date"] = False
+        return super().write(vals)