[ADD] estate: add an estate module

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': 'E-State!',
+    'summary': 'Manage real estate advertisements',
+    'description': """
+        Manage advertisements and offers for different real estate properties as part of the "Sever framework 101" tutorial
+    """,
+    'author': 'Odoo',
+    'website': 'https://www.odoo.com',
+    'version': '0.1',
+    'application': True,
+    'installable': True,
+    'depends': ['base'],
+    'data': [
+        'views/estate_property_views.xml',
+        'views/estate_property_offer_views.xml',
+        'views/estate_property_tag_views.xml',
+        'views/estate_property_type_views.xml',
+        'views/estate_menus.xml',
+        'views/res_users.xml',
+        'security/ir.model.access.csv',
+    ],
+    'license': 'AGPL-3',
+}

estate/models/__init__.py

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+from . import estate_property
+from . import estate_property_offer
+from . import estate_property_tag
+from . import estate_property_type
+from . import res_users

estate/models/estate_property.py

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+from odoo import api, fields, models
+from odoo.exceptions import UserError, ValidationError
+from odoo.tools.date_utils import relativedelta
+from odoo.tools.float_utils import float_compare, float_is_zero
+
+
+class EstateProperty(models.Model):
+    _name = 'estate.property'
+    _description = 'Real Estate Property'
+    _order = 'id desc'
+
+    name = fields.Char('Name', required=True)
+    property_type_id = fields.Many2one('estate.property.type', string='Property Type')
+    description = fields.Text('Description')
+    postcode = fields.Char('Postcode')
+    date_availability = fields.Date('Available From', default=fields.Date.today() + relativedelta(months=3), copy=False)
+    expected_price = fields.Float('Expected Price', required=True)
+    selling_price = fields.Float('Selling Price', readonly=True, copy=False)
+    best_price = fields.Float('Best Offer', compute='_compute_best_price')
+    bedrooms = fields.Integer('Bedrooms', default=2)
+    living_area = fields.Integer('Living Area (sqm)')
+    facades = fields.Integer('Facades')
+    garage = fields.Boolean('Has Garage')
+    garden = fields.Boolean('Has Garden')
+    garden_area = fields.Integer('Garden Area (sqm)')
+    garden_orientation = fields.Selection(string='Garden Orientation', selection=[('north', 'North'), ('south', 'South'), ('east', 'East'), ('west', 'West')])
+    total_area = fields.Float('Total Area (sqm)', compute='_compute_total_area')
+    salesperson_id = fields.Many2one('res.users', string='Salesperson', default=lambda self: self.env.user)
+    buyer_id = fields.Many2one('res.partner', string='Buyer', copy=False)
+    offer_ids = fields.One2many('estate.property.offer', 'property_id', string='Offers')
+    tag_ids = fields.Many2many('estate.property.tag', string='Tags')
+    state = fields.Selection(
+        string='State',
+        selection=[
+            ('new', 'New'),
+            ('offer_received', 'Offer Received'),
+            ('offer_accepted', 'Offer Accepted'),
+            ('sold', 'Sold'),
+            ('cancelled', 'Cancelled'),
+        ],
+        required=True,
+        copy=False,
+        default='new',
+    )
+    active = fields.Boolean('Active', default=True)
+
+    _sql_constraints = [
+        ('check_expected_price', 'CHECK(expected_price > 0)', 'The expected price should be strictly positive.'),
+        ('check_selling_price', 'CHECK(selling_price >= 0)', 'The selling price should be positive.'),
+        ('check_garden_area', 'CHECK(garden = false OR garden_area > 0)', 'The garden area should be strictly positive.'),
+        ('check_garden_orientation', "CHECK(garden = false OR garden_orientation IN ('north', 'south', 'east', 'west'))", 'You should choose a garden orientation.'),
+    ]
+
+    @api.ondelete(at_uninstall=False)
+    def _unlink_with_check_state(self):
+        for record in self:
+            if record.state not in ['new', 'cancelled']:
+                raise UserError(self.env._("You cannot delete a property unless it is 'New' or 'Cancelled'."))
+
+    @api.constrains('selling_price')
+    def _check_selling_price(self):
+        for record in self:
+            if not float_is_zero(record.selling_price, 2):
+                if record.expected_price:
+                    if float_compare(record.selling_price, record.expected_price * 0.9, 2) < 0:
+                        raise ValidationError(self.env._('The selling price must be at least 90% of the expected price.'))
+
+    @api.depends('living_area', 'garden_area')
+    def _compute_total_area(self):
+        for record in self:
+            if record.living_area or record.garden_area:
+                record.total_area = 0
+                if record.living_area:
+                    record.total_area += record.living_area
+                if record.garden_area:
+                    record.total_area += record.garden_area
+            else:
+                record.total_area = None
+
+    @api.depends('offer_ids')
+    def _compute_best_price(self):
+        for record in self:
+            if record.offer_ids:
+                record.best_price = max(record.offer_ids.mapped('price'))
+            else:
+                record.best_price = None
+
+    @api.onchange('garden')
+    def _onchange_garden(self):
+        if self.garden:
+            if not self.garden_area:
+                self.garden_area = 10
+            if not self.garden_orientation:
+                self.garden_orientation = 'north'
+        else:
+            self.garden_area = None
+            self.garden_orientation = None
+
+    def action_set_sold(self):
+        self.ensure_one()
+
+        if self.state == 'cancelled':
+            raise UserError(self.env._('Cancelled properties cannot be sold.'))
+
+        self.state = 'sold'
+
+    def action_set_cancelled(self):
+        self.ensure_one()
+
+        if self.state == 'sold':
+            raise UserError(self.env._('Sold properties cannot be cancelled.'))
+
+        self.state = 'cancelled'

estate/models/estate_property_offer.py

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+from odoo import api, fields, models
+from odoo.exceptions import UserError
+from odoo.tools.date_utils import relativedelta
+
+
+class EstatePropertyOffer(models.Model):
+    _name = 'estate.property.offer'
+    _description = 'Real Estate Property Offer'
+    _order = 'price desc'
+
+    price = fields.Float()
+    partner_id = fields.Many2one('res.partner', string='Partner', required=True)
+    property_id = fields.Many2one('estate.property', string='Property', required=True)
+    date_deadline = fields.Date('Deadline')
+    validity = fields.Integer('Validity (days)', default=7, compute='_compute_validity', inverse='_inverse_validity')
+    status = fields.Selection(
+        string='Status',
+        selection=[
+            ('accepted', 'Accepted'),
+            ('refused', 'Refused'),
+        ],
+        copy=False,
+    )
+    property_type_id = fields.Many2one(related='property_id.property_type_id')
+    property_state = fields.Selection(related='property_id.state')
+    active = fields.Boolean('Active', default=True)
+
+    _sql_constraints = [('check_price', 'CHECK(price > 0)', 'The price must be strictly positive.')]
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            p = self.env['estate.property'].browse(vals['property_id'])
+            if p.best_price > vals['price']:
+                raise UserError(self.env._('An offer with a higher price already exists.'))
+            if p.state == 'new':
+                p.state = 'offer_received'
+        return super().create(vals_list)
+
+    @api.depends('date_deadline')
+    def _compute_validity(self):
+        for record in self:
+            if record.date_deadline:
+                record.validity = (record.date_deadline - fields.date.today()).days
+
+    def _inverse_validity(self):
+        for record in self:
+            if isinstance(record.validity, int):
+                record.date_deadline = fields.date.today() + relativedelta(days=record.validity)
+
+    def action_accept(self):
+        if self.property_id.state in ['offer_accepted', 'sold'] and self.status != 'accepted':
+            raise UserError(self.env._('Another offer has already been accepted.'))
+        self.property_id.buyer_id = self.partner_id
+        self.property_id.selling_price = self.price
+        self.property_id.state = 'offer_accepted'
+        for offer in self.property_id.offer_ids:
+            offer.status = 'refused'
+        self.status = 'accepted'
+
+    def action_refuse(self):
+        if self.status == 'accepted':
+            if self.property_id.state == 'sold':
+                raise UserError(self.env._('The property has already been sold.'))
+            self.property_id.buyer_id = None
+            self.property_id.selling_price = None
+            self.property_id.state = 'offer_received'
+        self.status = 'refused'

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+
+class EstatePropertyTag(models.Model):
+    _name = 'estate.property.tag'
+    _description = 'Real Estate Property Tag'
+    _order = 'name'
+
+    name = fields.Char('Name', required=True)
+    color = fields.Integer('Color')
+    active = fields.Boolean('Active', default=True)
+
+    _sql_constraints = [('unique_tag_name', 'UNIQUE(name)', 'Tag name should be unique.')]

estate/models/estate_property_type.py

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+from odoo import api, fields, models
+
+
+class EstatePropertyType(models.Model):
+    _name = 'estate.property.type'
+    _description = 'Real Estate Property Type'
+    _order = 'sequence, name'
+
+    name = fields.Char('Name', required=True)
+    property_ids = fields.One2many('estate.property', 'property_type_id', string='Properties')
+    offer_ids = fields.One2many('estate.property.offer', 'property_type_id', string='Offers')
+    offer_count = fields.Integer('Offer Count', compute='_compute_offer_count')
+    sequence = fields.Integer('Sequence', help='Used to order property types. Lower is better.')
+    active = fields.Boolean('Active', default=True)
+
+    _sql_constraints = [('unique_type_name', 'UNIQUE(name)', 'Type name should be unique.')]
+
+    @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 User(models.Model):
+    _inherit = ['res.users']
+
+    property_ids = fields.One2many('estate.property', 'salesperson_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,access_estate_property,model_estate_property,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
+access_estate_property_tag,access_estate_property_tag,model_estate_property_tag,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

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_advertisements_menu" name="Advertisements">
+            <menuitem id="estate_property_menu_action" action="estate_property_action"/>
+        </menuitem>
+        <menuitem id="estate_settings_menu" 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>

estate/views/estate_property_offer_views.xml

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+<?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 string="Property Offers" editable="bottom"
+                decoration-success="status == 'accepted'" decoration-danger="status == 'refused'">
+                <field name="price" />
+                <field name="partner_id" />
+                <field name="validity" />
+                <field name="date_deadline" />
+                <button name="action_accept" string="Accept" type="object" icon="fa-check"
+                    invisible="property_state in ['sold', 'cancelled', 'offer_accepted'] or status == 'accepted'" />
+                <button name="action_refuse" string="Refuse" type="object" icon="fa-times"
+                    invisible="property_state in ['sold', 'cancelled'] or status == 'refused'" />
+            </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 string="Estate Property Offer">
+                <sheet>
+                    <group>
+                        <field name="price" />
+                        <field name="partner_id" />
+                        <field name="validity" />
+                        <field name="date_deadline" />
+                        <field name="status" />
+                    </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 string="Property Tags" editable="bottom">
+                <field name="name" />
+            </list>
+        </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</field>
+    </record>
+</odoo>