[ADD] estate: add real estate module (framework 101 tutorial)

.gitignore

@@ -127,3 +127,6 @@ dmypy.json
 
 # Pyre type checker
 .pyre/
+
+# VScode
+.vscode/

estate/__init__.py

@@ -0,0 +1 @@
+from . import models

estate/__manifest__.py

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+{
+    'name': 'Real Estate',
+    'description': 'Real Estate Advertising',
+    # 'version': '1.0',
+    'author': 'robal',
+    'license': 'LGPL-3',
+    '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_menus.xml",
+    ]
+}

estate/models/__init__.py

@@ -0,0 +1,4 @@
+from . import estate_property_offer
+from . import estate_property_tag
+from . import estate_property_type
+from . import estate_property

estate/models/estate_property.py

@@ -0,0 +1,112 @@
+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 = "Estate property"
+
+    name = fields.Char(string="Title", required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(string="Available From", default=fields.Date.today() + relativedelta(months=3), copy=False)
+    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()
+    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")],
+    )
+
+    # Reserved fields
+    active = fields.Boolean(default=True)
+    state = fields.Selection(
+        required=True,
+        selection=[("new", "New"), ("offer_received", "Offer Received"), ("offer_accepted", "Offer Accepted"), ("sold", "Sold"), ("cancelled", "Cancelled")],
+        default="new",
+        copy=False,
+        string="Status",
+    )
+
+    # Relations
+    property_type_id = fields.Many2one("estate.property.type", string="Property Type")
+    salesman_id = fields.Many2one("res.users", default=lambda self: self.env.user)
+    buyer_id = fields.Many2one("res.partner", copy=False)
+    tag_ids = fields.Many2many("estate.property.tag")
+    offer_ids = fields.One2many("estate.property.offer", "property_id")
+
+    # Computed
+    total_area = fields.Integer(compute="_compute_total_area", string="Total Area (sqm)")
+    best_price = fields.Float(compute="_compute_best_price", string="Best Offer")
+
+    @api.depends("living_area", "garden_area")
+    def _compute_total_area(self) -> None:
+        for record in self:
+            record.total_area = record.living_area + record.garden_area
+
+    @api.depends("offer_ids.price")
+    def _compute_best_price(self) -> None:
+        for record in self:
+            record.best_price = max(record.offer_ids.mapped("price"), default=0)
+
+    # Methods that trigger on changes
+    @api.onchange("garden")
+    def _compute_garden_defaults(self) -> None:
+        if self.garden:
+            self.garden_area = 10
+            self.garden_orientation = "north"
+        else:
+            self.garden_area = None
+            self.garden_orientation = None
+
+    # Public methods
+    def action_set_sold(self) -> bool:
+        for record in self:
+            if record.state == "sold":
+                error_msg = "This property has already been sold."
+                raise UserError(error_msg)
+
+            if record.state == "cancelled":
+                error_msg = "Cancelled properties cannot be sold."
+                raise UserError(error_msg)
+
+            record.state = "sold"
+        return True
+
+    def action_set_cancelled(self) -> bool:
+        for record in self:
+            if record.state == "sold":
+                error_msg = "Sold properties cannot be cancelled."
+                raise UserError(error_msg)
+
+            if record.state == "cancelled":
+                error_msg = "This property has already been cancelled."
+                raise UserError(error_msg)
+
+            record.state = "cancelled"
+        return True
+
+    # Constraints
+    _expected_price_strict_positive = models.Constraint(
+        "CHECK(expected_price > 0)",
+        "A property's expected price must be strictly greater than 0.",
+    )
+
+    _selling_price_positive = models.Constraint(
+        "CHECK(selling_price >= 0)",
+        "A property's selling price must be equal to or greater than 0.",
+    )
+
+    @api.constrains("expected_price", "selling_price")
+    def _restrict_selling_price(self) -> None:
+        for record in self:
+            # Selling price is zero when no offer has been accepted
+            if not float_is_zero(record.selling_price, precision_digits=2) and float_compare(record.selling_price, 0.9 * record.expected_price, precision_digits=2) < 0:
+                error_msg = "A property's selling price cannot be lower that 90 percent of its expected price."
+                raise ValidationError(error_msg)

estate/models/estate_property_offer.py

@@ -0,0 +1,68 @@
+from datetime import date
+
+from dateutil.relativedelta import relativedelta
+from odoo import api, fields, models
+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,
+    )
+    validity = fields.Integer(default=7, string="Validity (days)")
+
+    # Relations
+    partner_id = fields.Many2one("res.partner", required=True)
+    property_id = fields.Many2one("estate.property", required=True)
+
+    # Computed
+    date_deadline = fields.Date(compute="_compute_deadline", inverse="_inverse_deadline", string="Deadline")
+
+    @api.depends("create_date", "validity")
+    def _compute_deadline(self) -> None:
+        for record in self:
+            record.date_deadline = _get_reference_date(record) + relativedelta(days=record.validity)
+
+    def _inverse_deadline(self) -> None:
+        for record in self:
+            record.validity = (record.date_deadline - _get_reference_date(record)).days
+
+    # Public methods
+    def action_accept(self) -> bool:
+        for record in self:
+            if record.status == "accepted":
+                error_msg = "This offer has already been accepted."
+                raise UserError(error_msg)
+
+            if record.property_id.offer_ids.filtered(lambda r: r.status == "accepted"):
+                error_msg = "Cannot accept this offer because another offer has already been accepted for the property."
+                raise UserError(error_msg)
+
+            record.status = "accepted"
+            record.property_id.selling_price = record.price
+            record.property_id.buyer_id = record.partner_id
+        return True
+
+    def action_refuse(self) -> bool:
+        for record in self:
+            if record.status == "accepted":
+                record.property_id.selling_price = 0
+                record.property_id.buyer_id = None
+
+            record.status = "refused"
+        return True
+
+    # Constraints
+    _price_strict_positive = models.Constraint(
+        "CHECK(price > 0)",
+        "An offer's price must be strictly greater than 0.",
+    )
+
+
+def _get_reference_date(offer: EstatePropertyOffer) -> date:
+    return fields.Date.today() if not offer.create_date else offer.create_date.date()

estate/models/estate_property_tag.py

@@ -0,0 +1,14 @@
+from odoo import fields, models
+
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Estate property tag"
+
+    name = fields.Char(required=True)
+
+    # Constraints
+    _uniq_name = models.Constraint(
+        "UNIQUE(name)",
+        "A property tag's name must be unique.",
+    )

estate/models/estate_property_type.py

@@ -0,0 +1,14 @@
+from odoo import fields, models
+
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Estate property type"
+
+    name = fields.Char(required=True)
+
+    # Constraints
+    _uniq_name = models.Constraint(
+        "UNIQUE(name)",
+        "A property type's name must be unique.",
+    )

estate/security/ir.model.access.csv

@@ -0,0 +1,5 @@
+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_menus.xml

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+<?xml version="1.0"?>
+<odoo>
+    <menuitem id="estate_menu_root" name="Real Estate">
+        <menuitem id="estate_properties_first_level" name="Properties">
+            <menuitem id="estate_properties_menu" action="estate_property_action"/>
+        </menuitem>
+        <menuitem id="estate_settings_first_level" name="Settings">
+            <menuitem id="estate_property_types_menu" action="estate_property_type_action"/>
+            <menuitem id="estate_property_tags_menu" action="estate_property_tag_action"/>
+        </menuitem>
+    </menuitem>
+</odoo>

estate/views/estate_property_offer_views.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0"?>
+<odoo>
+    <record id="estate_property_offer_list_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="validity"/>
+                <field name="date_deadline"/>
+                <button name="action_accept" type="object" icon="fa-check" string="Accept"/>
+                <button name="action_refuse" type="object" icon="fa-times" string="Refuse"/>
+                <field name="status"/>
+            </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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+<?xml version="1.0"?>
+<odoo>
+    <record id="estate_property_tag_list_view" model="ir.ui.view">
+        <field name="name">estate.property.tag.list</field>
+        <field name="model">estate.property.tag</field>
+        <field name="arch" type="xml">
+            <list>
+                <field name="name"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="estate_property_tag_form_view" model="ir.ui.view">
+        <field name="name">estate.property.tag.form</field>
+        <field name="model">estate.property.tag</field>
+        <field name="arch" type="xml">
+            <form>
+                <sheet>
+                    <group>
+                        <field name="name"/>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+    <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"?>
+<odoo>
+    <record id="estate_property_type_list_view" model="ir.ui.view">
+        <field name="name">estate.property.type.list</field>
+        <field name="model">estate.property.type</field>
+        <field name="arch" type="xml">
+            <list>
+                <field name="name"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="estate_property_type_form_view" 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>
+                <sheet>
+                    <h1>
+                        <field name="name"/>
+                    </h1>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+    <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>