[ADD] estate: Real estate management module

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    "name": "Real Estate",
+    "description": "",
+    "depends": ["base"],
+    "sequence": 1,
+    "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",
+        "views/res_users_views.xml",
+    ],
+    "license": "LGPL-3",
+    "application": True,
+    "installable": True,
+}

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 res_users

estate/models/estate_property.py

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+from datetime import timedelta
+from odoo import models, fields, api
+from odoo.exceptions import ValidationError, UserError
+from odoo.tools import float_is_zero, float_compare
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "Estate Property"
+    _sql_constraints = [
+        (
+            "check_expected_price",
+            "CHECK(expected_price > 0)",
+            "The expected price must be greater than 0.",
+        ),
+    ]
+    _order = "id desc"
+
+    name = fields.Char(string="Name", required=True)
+    description = fields.Text(string="Description")
+    active = fields.Boolean(
+        string="Active",
+        default=True,
+        help="Mark as active if you want the property to be listed.",
+    )
+    postcode = fields.Char(string="Postcode")
+    property_type_id = fields.Many2one("estate.property.type", string="Property Type")
+    date_availability = fields.Date(
+        string="Available From",
+        default=fields.Date.today() + timedelta(days=90),
+        copy=False,
+    )
+    expected_price = fields.Float(string="Expected Price", required=True)
+    selling_price = fields.Float(string="Selling Price", readonly=True, copy=False)
+    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)")
+    garden_orientation = fields.Selection(
+        string="Garden Orientation",
+        selection=[
+            ("north", "North"),
+            ("south", "South"),
+            ("east", "East"),
+            ("west", "West"),
+        ],
+    )
+    total_area = fields.Integer(
+        string="Total Area (sqm)",
+        compute="_compute_total_area",
+    )
+    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"),
+        ],
+    )
+    salesman_id = fields.Many2one(
+        "res.users", string="Salesman", default=lambda self: self.env.user
+    )
+    buyer_id = fields.Many2one("res.partner", string="Buyer", copy=False, readonly=True)
+    tag_ids = fields.Many2many(
+        "estate.property.tag",
+        string="Tags",
+        help="Properties associated with this tag.",
+    )
+    offer_ids = fields.One2many(
+        "estate.property.offer",
+        "property_id",
+        string="Offers",
+        help="Offers made on this property.",
+    )
+    best_price = fields.Float(
+        string="Best Offer",
+        compute="_compute_best_price",
+    )
+
+    @api.depends("living_area", "garden_area", "garden")
+    def _compute_total_area(self):
+        for property in self:
+            property.total_area = property.living_area + (
+                property.garden_area if property.garden else 0
+            )
+
+    @api.depends("offer_ids.price")
+    def _compute_best_price(self):
+        for property in self:
+            property.best_price = max(property.offer_ids.mapped("price"), default=0.0)
+
+    @api.constrains("selling_price", "expected_price")
+    def _check_selling_price(self):
+        for property in self:
+            if float_is_zero(property.selling_price, precision_rounding=2):
+                continue
+
+            if (
+                float_compare(
+                    property.selling_price,
+                    property.expected_price * 0.9,
+                    precision_rounding=2,
+                )
+                < 0
+            ):
+                raise ValidationError(
+                    "The selling price cannot be lower than 90'%' of the expected price!"
+                )
+
+    @api.onchange("garden")
+    def _onchange_garden(self):
+        for property in self:
+            if property.garden:
+                property.garden_area = 10
+                property.garden_orientation = "north"
+            else:
+                property.garden_area = 0
+                property.garden_orientation = False
+
+    @api.ondelete(at_uninstall=False)
+    def _unlink_check(self):
+        for property in self:
+            if property.state not in ["new", "cancelled"]:
+                raise UserError(
+                    "You cannot delete a property that is not new or cancelled."
+                )
+
+    def action_set_sold(self):
+        for property in self:
+            if property.selling_price > 0.0 and property.state != "cancelled":
+                property.state = "sold"
+            elif property.state == "cancelled":
+                raise UserError("A cancelled property cannot be sold.")
+            elif property.state == "new" or property.state == "offer received":
+                raise UserError(
+                    "This property must have an accepted offer before it can be sold."
+                )
+            elif property.state == "sold":
+                raise UserError("This property is already sold.")
+
+    def action_set_cancelled(self):
+        for property in self:
+            if property.state != "cancelled" and property.state != "sold":
+                property.state = "cancelled"
+            elif property.state == "cancelled":
+                raise UserError("This property is already cancelled.")
+            elif property.state == "sold":
+                raise UserError("A sold property cannot be cancelled.")

estate/models/estate_property_offer.py

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+from datetime import timedelta
+from odoo import models, fields, api
+from odoo.exceptions import UserError
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Estate Property Offer"
+    _sql_constraints = [
+        ("check_price", "CHECK(price > 0)", "The price must be greater than 0."),
+    ]
+    _order = "price desc"
+
+    price = fields.Float(string="Price")
+    status = fields.Selection(
+        string="Status",
+        selection=[
+            ("accepted", "Accepted"),
+            ("refused", "Refused"),
+        ],
+    )
+    validity = fields.Integer(
+        string="Validity(days)",
+        default=7,
+        help="Validity of the offer in days, after that it will be refused automatically.",
+    )
+    date_deadline = fields.Date(
+        string="Deadline",
+        compute="_compute_date_deadline",
+        inverse="_inverse_date_deadline",
+        store=True,
+    )
+    partner_id = fields.Many2one("res.partner", string="Partner", required=True)
+    property_id = fields.Many2one("estate.property", string="Property", required=True)
+    property_type_id = fields.Many2one(
+        "estate.property.type",
+        string="Property Type",
+        related="property_id.property_type_id",
+        store=True,
+    )
+
+    @api.depends("validity")
+    def _compute_date_deadline(self):
+        for offer in self:
+            base_date = (
+                fields.Date.to_date(offer.create_date)
+                if offer.create_date
+                else fields.Date.context_today(offer)
+            )
+            offer.date_deadline = base_date + timedelta(days=offer.validity or 0)
+
+    def _inverse_date_deadline(self):
+        for offer in self:
+            if offer.date_deadline:
+                base_date = (
+                    fields.Date.to_date(offer.create_date)
+                    if offer.create_date
+                    else fields.Date.context_today(offer)
+                )
+                offer.validity = (offer.date_deadline - base_date).days
+            else:
+                offer.validity = 0
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for record in vals_list:
+            property = self.env["estate.property"].browse(record["property_id"])
+
+            if record.get("price") < property.best_price:
+                raise UserError(
+                    "You cannot create an offer lower than an existing one."
+                )
+
+            property.state = "offer received"
+        return super().create(vals_list)
+
+    def action_set_accepted(self):
+        for offer in self:
+            if offer.property_id.selling_price == 0.0:
+                offer.write({"status": "accepted"})
+
+                offer.property_id.write(
+                    {
+                        "state": "offer accepted",
+                        "selling_price": offer.price,
+                        "buyer_id": offer.partner_id.id,
+                    }
+                )
+
+                other_offers = offer.property_id.offer_ids - offer
+
+                other_offers.write({"status": "refused"})
+            else:
+                raise UserError("One offer is already accepted for this property.")
+
+    def action_set_refused(self):
+        for offer in self:
+            if offer.status == "accepted":
+                offer.property_id.state = "offer received"
+                offer.property_id.buyer_id = False
+                offer.property_id.selling_price = 0.0
+            offer.status = "refused"

estate/models/estate_property_tag.py

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+from odoo import models, fields
+
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Estate Property Tag"
+    _sql_constraints = [
+        ("unique_name", "UNIQUE(name)", "A tag with same name is already exists."),
+    ]
+    _order = "name asc"
+
+    name = fields.Char(string="Tag Name", required=True)
+    description = fields.Text(string="Description")
+    color = fields.Integer(string="Color")

estate/models/estate_property_type.py

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+from odoo import models, fields, api
+
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Estate Property Type"
+    _sql_constraints = [
+        ("unique_name", "UNIQUE(name)", "A type with same name is already exists."),
+    ]
+    _order = "sequence,name"
+
+    name = fields.Char(required=True)
+    property_ids = fields.One2many(
+        comodel_name="estate.property",
+        inverse_name="property_type_id",
+        string="Properties",
+    )
+    offer_ids = fields.One2many("estate.property.offer", "property_type_id")
+    sequence = fields.Integer(
+        "Sequence", default=1, help="Used to order types. Lower is better."
+    )
+    offer_count = fields.Integer("Offers", compute="_compute_offer_count")
+
+    @api.depends("offer_ids")
+    def _compute_offer_count(self):
+        for record in self:
+            record.offer_count = len(record.offer_ids)

estate/models/res_users.py

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+from odoo import fields, models
+
+
+class ResUser(models.Model):
+    _inherit = "res.users"
+
+    property_ids = fields.One2many(
+        "estate.property",
+        "salesman_id",
+        string="Properties",
+        domain=[("state", "in", ["new", "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
+access_estate_property,estate.property,model_estate_property,base.group_user,1,1,1,1
+access_estate_property_type,estate.property.type,model_estate_property_type,base.group_user,1,1,1,1
+access_estate_property_tag,estate.property.tag,model_estate_property_tag,base.group_user,1,1,1,1
+access_estate_property_offer,estate.property.offer,model_estate_property_offer,base.group_user,1,1,1,1

estate/views/estate_menus.xml

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+<?xml version="1.0" encoding="utf-8"?>
+
+<odoo>
+    <menuitem id="estate_menu_root" name="Real Estate">
+        <menuitem id="estate_menu_properties" name="Advertisements">
+            <menuitem id="estate_property_menu_action" action="estate_property_action"/>
+        </menuitem>
+        <menuitem id="estate_menu_property_types" name="Settings">
+            <menuitem id="estate_property_type_menu_action" action="estate_property_type_action"/>
+            <menuitem id="estate_property_tag_menu_action" action="estate_property_tag_action"/>
+        </menuitem>
+    </menuitem>
+</odoo>
+