[ADD] Estate: init

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': "Real Estate",
+    'summary': "Testing the real estate module",
+    'description': "Testing the description real estate module",
+    'depends': ['base'],
+    'data': [
+        'security/ir.model.access.csv',
+        'views/estate_property_offer_view.xml',
+        'views/estate_property_view.xml',
+        'views/estate_property_type_view.xml',
+        'views/estate_property_tag_view.xml',
+        'views/estate_menus.xml',
+    ],
+    'application': True,
+    'author': "Odoo",
+    'license': 'LGPL-3',
+}

estate/models/__init__.py

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+from . import (
+    estate_property,
+    estate_property_offer,
+    estate_property_tag,
+    estate_property_type,
+)

estate/models/estate_property.py

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+from odoo import api, fields, models, _
+from odoo.tools import float_compare
+from odoo.exceptions import UserError, ValidationError
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "Estate property model"
+
+    _check_expected_price = models.Constraint(
+        'CHECK(expected_price > 0)',
+        'Expected price of the property must be strictly positive.',
+    )
+
+    _check_selling_price = models.Constraint(
+        'CHECK(selling_price >= 0)',
+        'Selling price of the property must be strictly positive.',
+    )
+
+    name = fields.Char("Title", required=True, default="Unknown")
+    description = fields.Text("Description")
+    postcode = fields.Char("Postcode")
+    expected_price = fields.Float("Expected Price", required=True)
+    date_availability = fields.Date(
+        "Available From",
+        default=fields.Date.add(fields.Date.today(), months=3),
+        copy=False,
+    )
+    selling_price = fields.Float("Selling Price", readonly=True, copy=False)
+    bedrooms = fields.Integer("Bedrooms", default=2)
+    living_area = fields.Integer("Living Area (sqm)")
+    facades = fields.Integer()
+    garage = fields.Boolean()
+    garden = fields.Boolean()
+    garden_area = fields.Integer()
+    garden_orientation = fields.Selection(
+        string="Orientation",
+        selection=[("north", "N"), ("south", "S"), ("east", "E"), ("west", "W")],
+        help="Orientation of the garden",
+    )
+    last_seen = fields.Datetime("Last Seen", default=fields.Datetime.now)
+    active = fields.Boolean(default=True)
+    state = fields.Selection(
+        string="State",
+        selection=[
+            ("new", "New"),
+            ("offer_received", "Offer Received"),
+            ("offer_accepted", "Offer Accepted"),
+            ("sold", "Sold"),
+            ("cancelled", "Cancelled"),
+        ],
+        default="new",
+    )
+
+    property_type_id = fields.Many2one(
+        'estate.property.type', string='Property Type', ondelete='restrict'
+    )
+
+    salesperson_id = fields.Many2one(
+        'res.users',
+        string='Salesman',
+        ondelete='restrict',
+        default=lambda self: self.env.user.partner_id,
+    )
+
+    buyer_id = fields.Many2one(
+        'res.partner', string='Buyer', ondelete='restrict', copy=False, readonly=True,
+    )
+
+    property_tags_ids = fields.Many2many("estate.property.tag", string="Tags")
+
+    offer_ids = fields.One2many("estate.property.offer", "property_id", string="Offers")
+    total_area = fields.Float(compute="_compute_total_area")
+    best_offer = fields.Float(compute="_compute_best_offer")
+
+    @api.depends("garden_area", "living_area")
+    def _compute_total_area(self):
+        for record in self:
+            record.total_area = record.garden_area + record.living_area
+
+    @api.depends("offer_ids")
+    def _compute_best_offer(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, self.garden_orientation = 10, "north"
+        else:
+            self.garden_area, self.garden_orientation = 0, None
+
+    def action_mark_as_sold(self):
+        for record in self:
+            if record.state == "cancelled":
+                raise UserError(_("Canceled properties cannot be sold."))
+            record.state = "sold"
+        return True
+
+    def action_mark_as_cancelled(self):
+        for record in self:
+            if record.state == "sold":
+                raise UserError(_("Sold properties cannot be cancelled."))
+            record.state = "cancelled"
+        return True
+
+    @api.constrains('expected_price')
+    def _check_expected_price(self):
+        for record in self:
+            for offer in record.offer_ids:
+                if offer.status == "yes" and float_compare(offer.price, 0.9 * record.expected_price, 2) < 0:
+                    raise ValidationError("There is an accepted offer for an amount less than 90 percent of the new selling price, action required!")

estate/models/estate_property_offer.py

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+from odoo import api, fields, models, _
+from odoo.tools import float_compare
+from odoo.exceptions import UserError, ValidationError
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Estate property offer"
+
+    _check_offer_price = models.Constraint(
+        'CHECK(price > 0)', 'Offer price must be strictly positive.'
+    )
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        records = super().create(vals_list)
+        for record in records:
+            if record.property_id.state == "new":
+                record.property_id.state = "offer_received"
+        return records
+
+    price = fields.Float("Expected Price")
+    status = fields.Selection(
+        string="Status", selection=[("yes", "Accepted"), ("no", "Refused")], copy=False
+    )
+    validity = fields.Integer(default=7)
+    offer_creation_date = fields.Date(default=fields.Date.today())
+    deadline = fields.Date(
+        "Offer Deadline", compute="_compute_deadline", inverse="_inverse_deadline",
+    )
+
+    partner_id = fields.Many2one(
+        'res.partner',
+        string='Buyer',
+        ondelete='restrict',
+        default=lambda self: self.env.user.partner_id,
+        required=True,
+    )
+    property_id = fields.Many2one(
+        'estate.property', string='Property', ondelete='restrict', required=True
+    )
+
+    @api.depends("validity", "offer_creation_date")
+    def _compute_deadline(self):
+        for record in self:
+            record.deadline = fields.Date.add(
+                record.offer_creation_date, days=record.validity
+            )
+
+    def _inverse_deadline(self):
+        for record in self:
+            record.validity = (record.deadline - record.offer_creation_date).days
+
+    def action_accept_offer(self):
+        for record in self:
+            for offer in record.property_id.offer_ids:
+                if offer.status == "yes":
+                    raise UserError(_("Already accepted an offer for this property."))
+            if float_compare(record.price, 0.9 * record.property_id.expected_price, 2) < 0:
+                raise ValidationError("Accepted offer price cannot be less than 90 percent of property price")
+            record.status = "yes"
+            record.property_id.buyer_id = record.partner_id
+            record.property_id.selling_price = record.price
+            record.property_id.state = "offer_accepted"
+        return True
+
+    def action_reject_offer(self):
+        self.status = 'no'
+        self.property_id.write({'buyer_id': None, 'selling_price': 0})
+        return True
+
+    @api.constrains('price')
+    def _check_offered_price(self):
+        for record in self:
+            if float_compare(record.price, 0.9 * record.property_id.expected_price, 2) < 0:
+                raise ValidationError("Offer price cannot be less than 90 percent of property price")

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Estate property tag"
+    _name_unique = models.Constraint(
+        'unique (name)',
+        'A property tag of that name already exists',
+    )
+
+    name = fields.Char('Property Tag', required=True)

estate/models/estate_property_type.py

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+from odoo import fields, models
+
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Estate property type"
+    _name_unique = models.Constraint(
+        'unique (name)',
+        'A property type of that name already exists',
+    )
+
+    name = fields.Char('Property Type', required=True)

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_system,1,1,1,1
+access_estate_property_type,access_estate_property_type,model_estate_property_type,base.group_system,1,1,1,1
+access_estate_property_tag,access_estate_property_tag,model_estate_property_tag,base.group_system,1,1,1,1
+access_estate_property_offer,access_estate_property_offer,model_estate_property_offer,base.group_system,1,1,1,1
+view_estate_property,view_estate_property,model_estate_property,base.group_user,1,0,0,0

estate/views/estate_menus.xml

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+<?xml version="1.0"?>
+<odoo>
+    <menuitem id="estate_main_menu" name="Real Estate">
+        <menuitem id="advertisement_menu" name="Advertisment">
+            <menuitem id="property_menu_action" action="estate_property_action"/>
+        </menuitem>
+        <menuitem id="settings_menu" name="Settings">
+            <menuitem id="property_types_menu_action" action="estate_property_types_action"/>
+            <menuitem id="property_tags_menu_action" action="estate_property_tags_action"/>
+        </menuitem>
+    </menuitem>
+</odoo>

estate/views/estate_property_offer_view.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 Offer Form">
+                <sheet>
+                    <div>
+                        <group>
+                            <field name="price"/>
+                            <field name="partner_id"/>
+                            <field name="validity"/>
+                            <field name="deadline"/>
+                            <field name="status"/>
+                        </group>
+                    </div>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+    <record id="estate_property_offer_view_tree" 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">
+                <field name="price"/>
+                <field name="partner_id"/>
+                <field name="validity"/>
+                <field name="deadline"/>
+                <field name="status"/>
+                <button name="action_accept_offer" string="Accept" type="object" icon="fa-check"/>
+                <button name="action_reject_offer" string="Reject" type="object" icon="fa-remove"/>
+            </list>
+        </field>
+    </record>
+
+</odoo>

estate/views/estate_property_tag_view.xml

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+<?xml version="1.0"?>
+<odoo>
+    <record id="estate_property_tags_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</field>
+    </record>
+</odoo>

estate/views/estate_property_type_view.xml

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+<?xml version="1.0"?>
+<odoo>
+    <record id="estate_property_types_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</field>
+    </record>
+</odoo>