[WIP] Implementation of estate module

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    "name": "Real Estate",
+    "version": "1.0.0",
+    "depends": ["base"],
+    "author": "Amr (amgom)",
+    "category": "Real Estate",
+    "description": """
+    This is a real estate management module that allows users to manage properties, agents, and clients.
+    """,
+    "application": True,
+    "data": [
+        "security/ir.model.access.csv",
+        "views/estate_property_menus.xml",
+        "views/estate_property_offer_views.xml",
+        "views/estate_property_tag_views.xml",
+        "views/estate_property_type_views.xml",
+        "views/estate_property_views.xml",
+    ],
+}

estate/models/__init__.py

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+from . import estate, offer, property_tag, property_type

estate/models/estate.py

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+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 Estate(models.Model):
+    _name = "estate_property"
+    _description = "Real Estate"
+
+    name = fields.Char(string="Name", required=True)
+    description = fields.Text(string="Description")
+    postcode = fields.Char(string="Postcode")
+    date_availability = fields.Date(
+        string="Available From",
+        default=fields.Date.today() + relativedelta(months=3),
+        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")
+    facades = fields.Integer(string="Facades")
+    garage = fields.Boolean(string="Garage")
+    garden = fields.Boolean(string="Garden")
+    garden_area = fields.Integer(string="Garden Area")
+    garden_orientation = fields.Selection(
+        string="Garden Orientation",
+        selection=[
+            ("north", "North"),
+            ("east", "East"),
+            ("west", "West"),
+            ("south", "South"),
+        ],
+    )
+    active = fields.Boolean(string="Active", default=True)
+    state = fields.Selection(
+        string="Status",
+        selection=[
+            ("new", "New"),
+            ("offer_received", "Offer Received"),
+            ("offer_accepted", "Offer Accepted"),
+            ("sold", "Sold"),
+            ("cancelled", "Cancelled"),
+        ],
+        required=True,
+        copy=False,
+        default="new",
+    )
+    type_id = fields.Many2one(
+        string="Property Type",
+        comodel_name="estate_property_type",
+    )
+    salesman_id = fields.Many2one(
+        string="Salesman",
+        comodel_name="res.users",
+        default=lambda self: self.env.user,
+    )
+    buyer_id = fields.Many2one(string="Buyer", comodel_name="res.partner", copy=False)
+    tag_ids = fields.Many2many(string="Tags", comodel_name="estate_property_tag")
+    offer_ids = fields.One2many(
+        string="Offers",
+        comodel_name="estate_property_offer",
+        inverse_name="property_id",
+    )
+    total_area = fields.Float(string="Total Area", compute="_compute_total_area")
+    best_offer = fields.Float(string="Best Offer", compute="_compute_best_offer")
+
+    _positive_expected_price = models.Constraint(
+        "CHECK(expected_price > 0)",
+        "Expected price should be strictly positive",
+    )
+    _positive_selling_price = models.Constraint(
+        "CHECK(selling_price >= 0)",
+        "Selling price should be positive",
+    )
+
+    @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_offer(self):
+        self.best_offer = (
+            max(self.offer_ids.mapped("price")) if len(self.offer_ids) else 0.0
+        )
+
+    @api.onchange("garden")
+    def _on_change_garden(self):
+        self.garden_area = 10 if self.garden else 0
+        self.garden_orientation = "north" if self.garden else None
+
+    def action_sell_property(self):
+        for property in self:
+            if property.state == "cancelled":
+                raise UserError("Cancelled properties cannot be sold")
+            property.state = "sold"
+
+        return True
+
+    def action_cancel_property(self):
+        for property in self:
+            if property.state == "sold":
+                raise UserError("Sold properties cannot be cancelled")
+            property.state = "cancelled"
+
+        return True
+
+    @api.constrains("expected_price", "selling_price")
+    def _check_selling_price_limit(self):
+        for property in self:
+            if not float_is_zero(property.selling_price, precision_digits=5):
+                limit = 0.9 * property.expected_price
+                if (
+                    float_compare(property.selling_price, limit, precision_digits=5)
+                    == -1
+                ):
+                    raise ValidationError(
+                        "The selling price should not be less than 90% of the expected price of the property",
+                    )

estate/models/offer.py

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+from dateutil.relativedelta import relativedelta
+
+from odoo import api, fields, models
+from odoo.exceptions import UserError
+
+
+class Offer(models.Model):
+    _name = "estate_property_offer"
+    _description = "Offer made to some estate (property)"
+
+    price = fields.Float(string="Price")
+    status = fields.Selection(
+        string="Status",
+        selection=[("accepted", "Accepted"), ("refused", "Refused")],
+        copy=False,
+    )
+    property_id = fields.Many2one(
+        string="Property",
+        comodel_name="estate_property",
+        required=True,
+    )
+    partner_id = fields.Many2one(
+        string="Partner",
+        comodel_name="res.partner",
+        required=True,
+    )
+    validity = fields.Integer(string="Validity", default=7)
+    date_deadline = fields.Date(
+        string="Deadline",
+        compute="_compute_deadline",
+        inverse="_inverse_deadline",
+    )
+
+    _positive_offer_price = models.Constraint(
+        "CHECK(price > 0)",
+        "Offer price should be strictly positive",
+    )
+
+    @api.depends("validity")
+    def _compute_deadline(self):
+        for offer in self:
+            curr_date = offer.create_date if offer.create_date else fields.Date.today()
+            offer.date_deadline = curr_date + relativedelta(days=offer.validity)
+
+    def _inverse_deadline(self):
+        for offer in self:
+            date_diff = offer.date_deadline - (offer.create_date.date())
+            offer.validity = date_diff.days
+
+    def action_accept_offer(self):
+        # check if there is no other accepted offers
+        if "accepted" in self.property_id.offer_ids.mapped("status"):
+            raise UserError("Only one offer can be accepted for a given property!")
+
+        # update status, selling price, buyer
+        self.status = "accepted"
+        self.property_id.selling_price = self.price
+        self.property_id.buyer_id = self.partner_id
+
+    def action_refuse_offer(self):
+        self.status = "refused"
+        self.property_id.selling_price = 0
+        self.property_id.buyer_id = None

estate/models/property_tag.py

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+from odoo import fields, models
+
+
+class PropertyTag(models.Model):
+    _name = "estate_property_tag"
+    _description = "A list of tags that categorize the properities"
+
+    name = fields.Char(string="Name", required=True)
+
+    _unique_name = models.Constraint(
+        "UNIQUE(name)",
+        "Property tag names must be unique!",
+    )

estate/models/property_type.py

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+from odoo import fields, models
+
+
+class PropertyType(models.Model):
+    _name = "estate_property_type"
+    _description = "The type of the property to be sold such as House, apartment, ..."
+
+    name = fields.Char(string="Name", required=True)
+
+    _unique_name = models.Constraint(
+        "UNIQUE(name)",
+        "Property type names 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"
+access_estate_property,access_estate_property,model_estate_property,base.group_user,1,1,1,1
+access_estate_property_type,access_estate_property_type,model_estate_property_type,base.group_user,1,1,1,1
+access_estate_property_tag,access_estate_property_tag,model_estate_property_tag,base.group_user,1,1,1,1
+access_estate_property_offer,access_estate_property_offer,model_estate_property_offer,base.group_user,1,1,1,1

estate/views/estate_property_menus.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <menuitem id="menu_estate_root" name="Real Estate">
+        <menuitem id="menu_estate_property" name="Advertisements" action="estate_property_action"/>
+        <menuitem id="menu_estate_property_types" name="Settings">
+            <menuitem id="menu_estate_property_types_list" name="Property Types" action="estate_property_type_action"/>
+            <menuitem id="menu_estate_property_tags_list" 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" encoding="utf-8"?>
+<odoo>
+    <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="type">form</field>
+        <field name="arch" type="xml">
+            <form string="Create Offers">
+                <sheet>
+                    <group>
+                        <group>
+                            <field name="price"/>
+                            <field name="partner_id"/>
+                            <field name="validity"/>
+                            <field name="date_deadline"/>
+                            <field name="status"/>
+                        </group>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+</odoo>

estate/views/estate_property_tag_views.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">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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+<?xml version="1.0" encoding="utf-8"?>
+<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>