[ADD] estate: a new module to manage estate properties

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': 'Real Estate',
+    'depends': ['base'],
+    'category': 'Tutorials',
+    'application': True,
+    'data': ['data/ir.model.access.csv',
+             'views/res_users.xml',
+             'views/estate_property_offer_views.xml',
+             'views/estate_property_views.xml',
+             'views/estate_property_type_views.xml',
+             'views/estate_property_tag_views.xml',
+             'views/estate_menus.xml',
+             ],
+    'demo': [
+        "demo/demo.xml",
+    ],
+    'license': 'AGPL-3'
+}

estate/data/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_prop,access_estate_prop,model_estate_property,base.group_user,1,1,1,1
+access_estate_prop_type,access_estate_prop_type,model_estate_property_type,base.group_user,1,1,1,1
+access_estate_prop_offer,access_estate_prop_offer,model_estate_property_offer,base.group_user,1,1,1,1
+access_estate_prop_tag,access_estate_prop_tag,model_estate_property_tag,base.group_user,1,1,1,1

estate/demo/demo.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <data>
+        <record id="model_estate_property_action_cancel" model="ir.actions.server">
+            <field name="name">Mass cancel</field>
+            <field name="model_id" ref="estate.model_estate_property"/>
+            <field name="binding_model_id" ref="estate.model_estate_property"/>
+            <field name="binding_view_types">list</field>
+            <field name="state">code</field>
+            <field name="code">action = records.action_cancel()</field>
+        </record>
+    </data>
+</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 res_users

estate/models/estate_property.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 import float_compare
+from odoo.fields import Many2many, One2many
+
+from .helper import format_selection
+
+
+class EstateProperty(models.Model):
+    _name = 'estate.property'
+    _description = 'Estate Property modelisation'
+    _order = 'id desc'
+    _sql_constraints = [
+        ('expected_price_strictly_positive', 'CHECK(expected_price > 0)', 'Expected price must be stricly positive'),
+        ('selling_price_positive', 'CHECK(selling_price >= 0)', 'Selling price must be positive'),
+    ]
+
+    name = fields.Char(required=True, string="Name")
+    description = fields.Text(string="Description")
+    postcode = fields.Char(string="Postal code")
+    date_availability = fields.Date(default=lambda x: fields.Date.today() + relativedelta(months=3), copy=False,
+                                    string='Availability date')
+    expected_price = fields.Float(required=True, string='Expected price')
+    selling_price = fields.Float(readonly=True, copy=False, string='Selling price')
+    bedrooms = fields.Integer(default=2, string='Bedrooms')
+    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='Orientation',
+                                          selection=format_selection(['north', 'south', 'east', 'west']),
+                                          )
+    active = fields.Boolean(default=True, string='Active')
+    state = fields.Selection(string='State',
+                             selection=format_selection(
+                                 ['new', 'offer received', 'offer accepted', 'sold', 'canceled']),
+                             default='new')
+
+    property_type_id = fields.Many2one('estate.property.type', string='Property type')
+
+    buyer_id = fields.Many2one('res.partner', copy=False, string='Buyer')
+    salesperson_id = fields.Many2one('res.users', default=lambda self: self.env.user, string='Salesperson')
+
+    tag_ids = Many2many('estate.property.tag', string='Tags')
+    offer_ids = One2many('estate.property.offer', 'property_id', string='Offers')
+
+    total_area = fields.Integer(compute='_compute_total_area', string='Total area')
+    best_price = fields.Float(compute='_compute_best_price', string='Best offer price')
+
+    @api.depends('living_area', 'garden_area')
+    def _compute_total_area(self):
+        for estate in self:
+            estate.total_area = estate.living_area + estate.garden_area
+
+    @api.depends('offer_ids')
+    def _compute_best_price(self):
+        for estate in self:
+            estate.best_price = max(estate.offer_ids.mapped('price'), default=0)
+
+    @api.onchange('garden')
+    def _onchange_garden(self):
+        self.garden = [0, 10][self.garden]
+        self.garden_orientation = ['', 'north'][self.garden]
+
+    @api.constrains('selling_price')
+    def _check_price_offer_reasonable(self):
+        if float_compare(self.selling_price, 0.9 * self.expected_price, 3) <= 0:
+            raise ValidationError(_('The selling price must be at least 90% of the expected price.'))
+
+    @api.ondelete(at_uninstall=False)
+    def _unlink_property_if_not_new_nor_canceled(self):
+        self.ensure_one()
+        if self.state not in ('new', 'canceled'):
+            raise UserError(_('Only new and canceled properties can be deleted.'))
+
+    def action_sold(self):
+        self.ensure_one()
+        if self.state == 'canceled':
+            raise UserError(_('Canceled properties cannot be sold.'))
+        self.state = 'sold'
+        return True
+
+    def action_cancel(self):
+        self.ensure_one()
+        if self.state == 'sold':
+            raise UserError(_('Sold properties cannot be canceled.'))
+        self.state = 'canceled'
+        return True

estate/models/estate_property_offer.py

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+from dateutil.relativedelta import relativedelta
+
+from odoo import api, fields, models, _
+from odoo.exceptions import UserError
+
+from .helper import format_selection
+
+
+class EstatePropertyOffer(models.Model):
+    _name = 'estate.property.offer'
+    _order = 'price desc'
+    _description = 'Offer modelisation'
+    _sql_constraints = [('offer_price_strictly_positive', 'CHECK(price > 0)', 'Offer price must be stricly positive')]
+
+    price = fields.Float(string='Price', required=True)
+    status = fields.Selection(copy=False, selection=format_selection(['accepted', 'refused']), string='Status')
+    partner_id = fields.Many2one('res.partner', required=True, string='Buyer')
+    property_id = fields.Many2one('estate.property', required=True, string='Property')
+
+    validity = fields.Integer(default=7, string="Validity")  # in days
+    date_deadline = fields.Date(compute='_compute_deadline', inverse='_inverse_deadline', string='Deadline')
+
+    property_type_id = fields.Many2one(related='property_id.property_type_id', string='Property type')
+
+    @api.depends('validity')
+    def _compute_deadline(self):
+        for offer in self:
+            offer.date_deadline = fields.Date.today() + relativedelta(days=offer.validity)
+
+    def _inverse_deadline(self):
+        for offer in self:
+            offer.validity = (offer.date_deadline - fields.Date.today()).days
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            property_id = self.env['estate.property'].browse(vals['property_id'])
+            if any(vals['price'] < offer.price for offer in property_id.offer_ids):
+                raise UserError(_('Offer price must be higher than existing offers.'))
+            property_id.state = 'offer received'
+        return super().create(vals_list)
+
+    def action_accept(self):
+        self.ensure_one()
+        if self.property_id.state == 'sold':
+            raise UserError(_('The house was already sold.'))
+        self.status = 'accepted'
+        self.property_id.state = 'offer accepted'
+        self.property_id.buyer_id = self.partner_id
+        self.property_id.se.selling_price):
+            raise UserError(_('Customer or selling price was not set.'))
+'refused'
+        return True

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+
+class EstatePropertyTag(models.Model):
+    _name = 'estate.property.tag'
+    _order = 'name asc'
+    _description = 'Tag modelisation'
+    _sql_constraints = [('unique_name', 'unique(name)', 'Tag name must be unique')]
+
+    name = fields.Char(required=True, string='Tag Name')
+    color = fields.Integer(string='Color Index')

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 modelisation'
+    _order = 'sequence asc, name asc'
+    _sql_constraints = [('unique_name', 'unique(name)', 'Type name must be unique')]
+
+    name = fields.Char(required=True, string='Name')
+    property_ids = fields.One2many('estate.property', 'property_type_id', string='Properties')
+    sequence = fields.Integer(default=1)
+
+    offer_ids = fields.One2many('estate.property.offer', 'property_type_id', string='Offers')
+    offer_count = fields.Integer(compute='_compute_offer_count', string='Offer Count')
+
+    def _compute_offer_count(self):
+        for record in self:
+            record.offer_count = len(record.offer_ids)

estate/models/helper.py

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+def format_selection(l: list):
+    return [(field, field.title()) for field in l]

estate/models/res_users.py

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+from odoo import fields, models
+
+
+class Users(models.Model):
+    _inherit = 'res.users'
+
+    property_ids = fields.One2many('estate.property', 'salesperson_id',
+                                   domain=[('state', 'not in', ['sold', 'canceled'])])

estate/views/estate_menus.xml

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+<odoo>
+    <menuitem id="root_menu" name="Real Estate"/>
+    <menuitem id="ads_menu" name="Advertisements" parent="root_menu"/>
+    <menuitem id="prop_settings_menu" name="Settings" parent="root_menu"/>
+    <menuitem id="prop_menu" action="property_action" parent="ads_menu"/>
+    <menuitem id="prop_type_menu" action="property_type_action" parent="prop_settings_menu"/>
+    <menuitem id="prop_tag_menu" action="property_tag_action" parent="prop_settings_menu"/>
+</odoo>

estate/views/estate_property_offer_views.xml

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+<odoo>
+    <record id="property_offer_action" model="ir.actions.act_window">
+        <field name="name">Property Offers</field>
+        <field name="res_model">estate.property.offer</field>
+        <field name="domain">[('property_type_id', '=', active_id)]</field>
+        <field name="view_mode">list</field>
+    </record>
+
+
+    <record id="estate_property_offer_view_list" 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 decoration-success="status == 'accepted'"
+                  decoration-danger="status == 'refused'">
+                <field name="price"/>
+                <field name="partner_id"/>
+                <field name="validity" string="Validity (days)"/>
+                <field name="date_deadline" string="Deadline"/>
+                <button name="action_accept" type="object" icon="fa-check"
+                        invisible="status"/>
+                <button name="action_refuse" type="object" icon="fa-times"
+                        invisible="status"/>
+                <field name="status" string="Status"/>
+            </list>
+        </field>
+    </record>
+</odoo>

estate/views/estate_property_tag_views.xml

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+<odoo>
+    <record id="property_tag_action" model="ir.actions.act_window">
+        <field name="name">Properties Tags</field>
+        <field name="res_model">estate.property.tag</field>
+        <field name="view_mode">list</field>
+    </record>
+</odoo>

estate/views/estate_property_type_views.xml

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+<odoo>
+    <record id="property_type_view_list" 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 string="Property Type List">
+                <field name="sequence" widget="handle"/>
+                <field name="name"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="property_type_view_form" 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 string="Property Form">
+                <sheet>
+                    <div name="button_box" position="inside">
+                        <button class="oe_stat_button" name="%(action_property_offer)d" type="action"
+                                string="View Offers"
+                                icon="fa-money">
+                            <field string="Offers" name="offer_count" widget="statinfo"/>
+                        </button>
+                    </div>
+                    <group>
+                        <field name="name"/>
+                    </group>
+
+                    <notebook>
+                        <page string="Properties">
+                            <field name="property_ids">
+                                <list>
+                                    <field name="name" string="Title"/>
+                                    <field name="expected_price"/>
+                                    <field name="state"/>
+                                </list>
+                            </field>
+                        </page>
+                    </notebook>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+    <record id="property_type_action" model="ir.actions.act_window">
+        <field name="name">Properties Types</field>
+        <field name="res_model">estate.property.type</field>
+        <field name="view_mode">list,form</field>
+    </record>
+</odoo>