[ADD] real_estate : add real estate property and create invoice

estate_account/__init__.py

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+from . import models

estate_account/__manifest__.py

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+{
+    'name': 'Estate Accounting',
+    'version': '1.0',
+    'depends': ['real_estate', 'account'],
+    'category': 'Real Estate',
+    'license': 'LGPL-3',
+    'installable': True,
+    'application': False,
+}

estate_account/models/__init__.py

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+from . import estate_property

estate_account/models/estate_property.py

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+from odoo import models, Command
+from odoo.exceptions import UserError
+
+
+class EstateProperty(models.Model):
+    _inherit = 'estate.property'
+
+    def action_sold(self):
+        res = super().action_sold()
+
+        for record in self:
+            if not record.buyer_id:
+                raise UserError("Please set a Buyer before generating an invoice.")
+            if not record.selling_price:
+                raise UserError("Please set a Selling Price before generating an invoice.")
+
+            journal = self.env['account.journal'].search([('type', '=', 'sale')], limit=1)
+            if not journal:
+                raise UserError("No sale journal found. Please configure at least one sale journal.")
+
+            invoice_vals = {
+                "partner_id": record.buyer_id.id,
+                "move_type": "out_invoice",
+                "journal_id": journal.id,
+                "invoice_line_ids": [
+                    Command.create({
+                        "name": "6% Commission",
+                        "quantity": 1,
+                        "price_unit": 0.06 * record.selling_price,
+                    }),
+                    Command.create({
+                        "name": "Administrative Fees",
+                        "quantity": 1,
+                        "price_unit": 100.0,
+                    }),
+                ]
+            }
+
+            self.env["account.move"].create(invoice_vals)
+        return res

real_estate/__init__.py

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+from . import models

real_estate/__manifest__.py

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+{
+    'name': 'real_estate',
+     'depends': [
+        'base',
+        ],
+    'application': True,
+    'installable': True,
+    'license': 'LGPL-3',
+    'data': [
+    'security/ir.model.access.csv',
+    'view/estate_property_views.xml',
+    'view/estate_property_offer_views.xml',
+    'view/estate_property_type_views.xml',
+    'view/estate_property_tag_views.xml',
+    'view/estate_res_users_view.xml',
+    'view/estate_menu.xml',
+],
+}

real_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 estate_res_users

real_estate/models/estate_property.py

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+from datetime import date, timedelta
+from odoo import fields, models, api
+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"
+    _order = "id desc"
+
+    name = fields.Char(default="Unknown", required=True)
+    description = fields.Text(string="Description")
+    postcode = fields.Char(string="Postcode")
+    availability_date = fields.Date(default=lambda self: date.today() + timedelta(days=90), copy=False)
+    expected_price = fields.Float(string="Expected Price", required=True)
+    selling_price = fields.Float(readonly=True, copy=False)
+    _sql_constraints = [
+    ('check_expected_price_positive', 'CHECK(expected_price > 0)', 'The expected price must be strictly positive.'),
+    ('check_selling_price_positive', 'CHECK(selling_price >= 0)', 'The selling price must be positive.')
+]
+    bedrooms = fields.Integer(default=2)
+    living_area = fields.Float(string="Living Area")
+    facades = fields.Integer(string="Facades")
+    garage = fields.Boolean(string="Garage")
+    garden = fields.Boolean(string="Garden")
+    garden_area = fields.Float(string="Garden Area")
+    total_area = fields.Float(string="Total Area", compute="_compute_total_area")
+    garden_orientation = fields.Selection(
+        [
+            ('north', 'North'),
+            ('south', 'South'),
+            ('east', 'East'),
+            ('west', 'West')
+        ],
+        string="Garden Orientation"
+    )
+    last_seen = fields.Datetime("Last Seen", default=fields.Datetime.now)
+    active = fields.Boolean(default=False)
+    state = fields.Selection(
+        selection=[
+            ('new', 'New'),
+            ('offer_received', 'Offer Received'),
+            ('offer_accepted', 'Offer Accepted'),
+            ('sold', 'Sold'),
+            ('cancelled', 'Cancelled'),
+        ],
+        required=True,
+        copy=False,
+        default='new'
+    )
+    property_type_id = fields.Many2one('estate.property.type', string="Property Type")
+    buyer_id = fields.Many2one('res.partner', string="Buyer", copy=False)
+    salesperson_id = fields.Many2one('res.users', string="Salesperson", default=lambda self: self.env.user)
+    tag_ids = fields.Many2many('estate.property.tag', string="Tags")
+    offer_ids = fields.One2many('estate.property.offer', 'property_id', string="Offers")
+    best_price = fields.Float(string="Best Offer", compute="_compute_best_price")
+
+    @api.constrains('selling_price', 'expected_price')
+    def _check_selling_price(self):
+        for record in self:
+            if (float_is_zero(record.selling_price, precision_digits=2)
+            or record.state not in ['offer_accepted', 'sold']):
+                continue
+            min_acceptable_price = 0.9 * record.expected_price
+            if float_compare(record.selling_price, min_acceptable_price, precision_digits=2) < 0:
+                raise ValidationError("Selling price cannot be lower than 90% of the expected price.")
+
+    @api.depends('living_area', 'garden_area')
+    def _compute_total_area(self):
+        for record in self:
+            record.total_area = (record.living_area or 0.0) + (record.garden_area or 0.0)
+
+    @api.depends('offer_ids.price')
+    def _compute_best_price(self):
+        for record in self:
+            prices = record.offer_ids.mapped('price')
+            record.best_price = max(prices) if prices else 0.0
+
+    @api.onchange('garden')
+    def _onchange_garden(self):
+        if self.garden:
+            self.garden_area = 10
+            self.garden_orientation = 'north'
+        else:
+            self.garden_area = 0
+            self.garden_orientation = False
+
+    def action_cancel(self):
+        for record in self:
+            if record.state == 'sold':
+                raise UserError("Sold properties cannot be cancelled.")
+            record.state = 'cancelled'
+        return True
+
+    def action_sold(self):
+        for record in self:
+            if record.state == 'cancelled':
+                raise UserError("Cancelled properties cannot be sold.")
+            record.state = 'sold'
+        return True
+
+    @api.ondelete(at_uninstall=False)
+    def _check_deletion(self):
+        for record in self:
+            if record.state not in ['new', 'cancelled']:
+                raise UserError("You can only delete a property if its state is 'New' or 'Cancelled'.")

real_estate/models/estate_property_offer.py

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+from datetime import timedelta
+from odoo import models, fields, api
+from odoo.exceptions import UserError, ValidationError
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Property Offer"
+    _order = "price desc"
+
+    price = fields.Float(string="Offer Price")
+    state = fields.Selection([
+        ('new', 'New'),
+        ('accepted', 'Accepted'),
+        ('refused', 'Refused')
+    ], string="State", default='new', required=True)
+    _sql_constraints = [
+    ('check_price', 'CHECK(price > 0)', 'The offer price must be strictly positive.'),
+]
+    partner_id = fields.Many2one('res.partner', string="Partner", required=True)
+    property_id = fields.Many2one('estate.property', string="Property", required=True)
+    property_type_id = fields.Many2one(
+        related="property_id.property_type_id",
+        store=True,
+        readonly=True
+    )
+    validity = fields.Integer(default=7)
+    date_deadline = fields.Date(compute="_compute_date_deadline", inverse="_inverse_date_deadline", store=True)
+
+    @api.depends('create_date', 'validity')
+    def _compute_date_deadline(self):
+        for record in self:
+            create_date = record.create_date or fields.Datetime.now()
+            record.date_deadline = create_date.date() + timedelta(days=record.validity)
+
+    def _inverse_date_deadline(self):
+        for record in self:
+            create_date = record.create_date or fields.Datetime.now()
+            delta = record.date_deadline - create_date.date()
+            record.validity = delta.days
+
+    def action_accept(self):
+        for offer in self:
+            if offer.property_id.buyer_id:
+                raise UserError("An offer has already been accepted.")
+            offer.state = 'accepted'
+            offer.property_id.write({
+                'selling_price': offer.price,
+                'buyer_id': offer.partner_id.id,
+                'state': 'offer_accepted'
+            })
+        return True
+
+    def action_refuse(self):
+        for offer in self:
+            offer.state = 'refused'
+        return True
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            price = vals.get('price')
+            property_obj = self.env['estate.property'].browse(vals.get('property_id'))
+            existing_offers = property_obj.offer_ids.filtered(lambda o: o.price >= price)
+            if existing_offers:
+                raise ValidationError("You cannot create an offer with a lower or equal price than existing offers.")
+            property_obj.state = 'offer_received'
+
+        return super().create(vals_list)

real_estate/models/estate_property_tag.py

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

real_estate/models/estate_property_type.py

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+from odoo import models, fields, api
+
+
+class EstatePropertyType(models.Model):
+    _name = 'estate.property.type'
+    _description = 'Property Type'
+    _order = "sequence, name"
+
+    name = fields.Char(required=True)
+    _sql_constraints = [
+    ('unique_property_type', 'UNIQUE(name)', 'A property type name must be unique')
+]
+    property_ids = fields.One2many("estate.property", "property_type_id", string="Properties")
+    sequence = fields.Integer(string="Sequence", default=10)
+    offer_ids = fields.One2many(
+        "estate.property.offer",
+        "property_type_id",
+        string="Offers"
+    )
+    offer_count = fields.Integer(
+        string="Offers Count",
+        compute="_compute_offer_count"
+    )
+
+    @api.depends("offer_ids")
+    def _compute_offer_count(self):
+        for record in self:
+            record.offer_count = len(record.offer_ids)

real_estate/models/estate_res_users.py

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+from odoo import models, fields
+
+
+class ResUsers(models.Model):
+    _inherit = 'res.users'
+
+    property_ids = fields.One2many(
+        'estate.property',
+        'salesperson_id',
+        string="Properties",
+        domain=[('state', '!=', 'cancelled')]
+    )

real_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_user,access.estate.property.type.user,model_estate_property_type,base.group_user,1,1,1,1
+access_estate_property_tag_user,access.estate.property.tag.user,model_estate_property_tag,base.group_user,1,1,1,1
+access_estate_property_offer_user,access.estate.property.offer.user,model_estate_property_offer,base.group_user,1,1,1,1

real_estate/view/estate_menu.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <!-- Root Menu -->
+    <menuitem id="menu_real_estate_root" name="Real Estate"/>
+
+    <!-- First-Level Menu -->
+    <menuitem id="menu_real_estate_properties" name="Properties" parent="menu_real_estate_root"/>
+
+    <!-- Action Menu  -->
+    <menuitem id="menu_estate_property_action" action="action_estate_property" parent="menu_real_estate_properties"/>
+
+<menuitem id="setting"
+           name="Settings"
+            parent="menu_real_estate_root"/>
+
+    <menuitem id="menu_property_type_root"
+              name="Property Types"
+              parent="setting"
+              action="estate_property_type_action"/>
+
+    <menuitem id="menu_estate_property_tag"
+              name="Property Tags"
+              parent="setting"
+              action="action_estate_property_tag"/>
+</odoo>

real_estate/view/estate_property_offer_views.xml

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+<odoo>
+<data>
+ <record id="action_estate_property_offer" model="ir.actions.act_window">
+    <field name="name">Real estate offer</field>
+    <field name="res_model">estate.property.offer</field>
+    <field name="view_mode">list,form</field>
+    <field name="domain">[('property_type_id', '=', active_id)]</field>
+   </record>
+
+    <record id="estate_property_offer_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="Property Offer">
+           <header>
+    <button name="action_accept" string="Accept" type="object"
+            invisible="state != 'accepted'"/>
+
+    <button name="action_refuse" string="Refuse" type="object"
+            invisible="state == 'accepted'"/>
+            </header>
+
+                <sheet>
+                    <group>
+                        <field name="price"/>
+                        <field name="partner_id"/>
+                        <field name="state"/>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+    <record id="estate_property_offer_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 editable="bottom" string="Offers"
+              decoration-danger="state == 'refused'"
+              decoration-success="state == 'accepted'">
+                <field name="price"/>
+                <field name="partner_id"/>
+                 <button name="action_accept" type="object" string="✓" icon="fa-check"/>
+                <button name="action_refuse" type="object" string="✗" icon="fa-times"/>
+            </list>
+        </field>
+    </record>
+    </data>
+</odoo>