[ADD] real_estate: property management and offer system

real_estate/__init__.py

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+from . import models

real_estate/__manifest__.py

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+{
+    'name': 'Real estate',
+    'version': '0.1.0',
+    'summary': 'Manage real estate properties',
+    'sequence': '1',
+    'description': """
+Buying & selling Properties
+===========================
+This Module provide functionalities from where you manage the real estate properties from finding buyer to get best price.
+    """,
+    'category': 'sales',
+    'website': 'https://www.ishw.tech',
+    'depends': [
+        'base'
+    ],
+    '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_menus.xml',
+    ],
+    'installable': True,
+    'application': True,
+    'author': 'Ishwar',
+    'license': 'LGPL-3',
+}

real_estate/models/__init__.py

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+from . import real_estate_property
+from . import real_estate_property_type
+from . import real_estate_property_tag
+from . import real_estate_property_offer

real_estate/models/real_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.float_utils import float_compare, float_is_zero
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "Real Estate Property"
+
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(
+        copy=False,
+        default=lambda self: fields.Date.today() + relativedelta(months=3)
+    )
+    expected_price = fields.Float(required=True)
+    selling_price = fields.Float(
+        readonly=True,
+        copy=False,
+    )
+    bedrooms = fields.Integer(default=2)
+    living_area = fields.Integer()
+    facades = fields.Integer()
+    garage = fields.Boolean()
+    garden = fields.Boolean()
+    garden_area = fields.Integer()
+    garden_orientation = fields.Selection(
+        selection=[
+            ('north', 'North'),
+            ('south', 'South'),
+            ('east', 'East'),
+            ('west', 'West'),
+        ],
+        help='Garden facing direction',
+    )
+    active = fields.Boolean(default=True)
+    state = fields.Selection(
+        string='States',
+        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")
+    buyer_id = fields.Many2one("res.partner", copy=False)
+    salesperson_id = fields.Many2one(
+        "res.users", string="Sales Person", default=lambda self: self.env.user
+    )
+    tag_ids = fields.Many2many("estate.property.tag")
+    offer_ids = fields.One2many("estate.property.offer", "property_id")
+    total_area = fields.Float(compute="_compute_total_area")
+    best_price = fields.Float(compute="_compute_best_price")
+
+    @api.depends('living_area', 'garden_area')
+    def _compute_total_area(self):
+        for record in self:
+            record.total_area = record.living_area + record.garden_area
+
+    @api.depends('offer_ids.price')
+    def _compute_best_price(self):
+        for record in self:
+            if not record.mapped("offer_ids.price"):
+                record.best_price = 0
+            else:
+                record.best_price = max(record.mapped("offer_ids.price"))
+
+    @api.onchange('garden')
+    def _onchange_garden(self):
+        for record in self:
+            if record.garden:
+                record.garden_area = 10
+                record.garden_orientation = 'north'
+            else:
+                record.garden_area = 0
+                record.garden_orientation = False
+
+    def action_sold(self):
+        for record in self:
+            if record.state == 'cancelled':
+                raise UserError("Cancelled Properties Can Not be sold")
+            if not record.buyer_id:
+                raise UserError("Can not sold property who has no buyer")
+            record.state = 'sold'
+        return True
+
+    def action_cancelled(self):
+        for record in self:
+            if record.state == 'sold':
+                raise UserError("Sold Properties can not be cancel")
+            record.state = 'cancelled'
+        return True
+
+    def action_approve(self):
+        for record in self:
+            if record.state == 'sold':
+                raise UserError("Sold properties cannot accept other Offers.")
+            target_offer = record.offer_ids.filtered(lambda r: r.price == record.best_price)
+            if target_offer:
+                target_offer = target_offer[0]
+                target_offer.status = 'accepted'
+            (record.offer_ids - target_offer).status = 'refused'
+            record.selling_price = target_offer.price
+            record.buyer_id = target_offer.partner_id
+            record.state = 'offer_accepted'
+
+    @api.constrains('expected_price', 'selling_price')
+    def _check_price(self):
+        for record in self:
+            if record.expected_price <= 0:
+                raise ValidationError("Expected Price Must be Positive")
+            if record.selling_price < 0:
+                raise ValidationError("Selling price Must be Positive")
+
+    @api.constrains('selling_price', 'expected_price')
+    def _check_expected_selling_price(self):
+        for record in self:
+            if float_is_zero(record.selling_price, precision_digits=2):
+                continue
+
+            expected_selling_price = record.expected_price * 0.9
+            if float_compare(record.selling_price, expected_selling_price, precision_digits=2) < 0:
+                raise ValidationError("Selling price Must be 90% of the expected price")

real_estate/models/real_estate_property_offer.py

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+from dateutil.relativedelta import relativedelta
+
+from odoo import api, fields, models
+from odoo.exceptions import UserError, ValidationError
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Offers on Buy or Sell for properties"
+
+    price = fields.Float()
+    status = fields.Selection(
+        [
+            ("refused", "Refused"),
+            ("accepted", "Accepted"),
+        ],
+        copy=False,
+    )
+    partner_id = fields.Many2one("res.partner", required=True)
+    property_id = fields.Many2one("estate.property", required=True)
+    validity = fields.Integer(default=7)
+    date_deadline = fields.Date(compute="_compute_deadline", inverse="_inverse_deadline")
+
+    @api.depends('validity', 'create_date')
+    def _compute_deadline(self):
+        for record in self:
+            start_date = record.create_date or fields.Date.today()
+            record.date_deadline = start_date + relativedelta(days=record.validity)
+
+    def _inverse_deadline(self):
+        for record in self:
+            start_date = record.create_date or fields.Date.today()
+            record.validity = (record.date_deadline - fields.Date.to_date(start_date)).days
+
+    def action_accept(self):
+        for record in self:
+            if record.property_id.buyer_id:
+                raise UserError("You can accept offer only once per property")
+        record.status = 'accepted'
+        record.property_id.buyer_id = record.partner_id
+        record.property_id.selling_price = record.price
+        (record.property_id.offer_ids - record).status = 'refused'
+        record.property_id.state = 'offer_accepted'
+        return True
+
+    def action_refuse(self):
+        for record in self:
+            record.status = 'refused'
+        return True
+
+    @api.constrains('price')
+    def _check_offer_price(self):
+        for record in self:
+            if record.price <= 0:
+                raise ValidationError("Offer Price Must be Positive")
+
+    _check_partner = models.Constraint('UNIQUE(partner_id, property_id)', "User have already made a offer on this property")

real_estate/models/real_estate_property_tag.py

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+from odoo import fields, models
+
+
+class EstatePropertyTag(models.Model):
+    _name = 'estate.property.tag'
+    _description = 'This are tags used to identify property'
+
+    name = fields.Char(required=True)
+
+    _check_tag_name = models.Constraint('UNIQUE(name)', "Tag name Must be unique")

real_estate/models/real_estate_property_type.py

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+from odoo import fields, models
+
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Real Estate Property Types"
+
+    name = fields.Char(required=True)
+
+    _check_type_name = models.Constraint('UNIQUE(name)', "Type must be Unique")

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,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

real_estate/views/estate_menus.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <data>
+        <menuitem
+            id="estate_property_menu_root"
+            name="Real Estate"/>
+        <menuitem
+            id="estate_property_menu_1"
+            name="Advertisements"
+            parent="estate_property_menu_root"
+            sequence="1"/>
+        <menuitem
+            id="estate_property_menu_action"
+            name="All Properties"
+            parent="estate_property_menu_1"
+            action="estate_property_action"/>
+        <menuitem 
+            id="estate_property_menu_2"
+            name="settings"
+            parent="estate_property_menu_root"
+            sequence="2"/>
+        <menuitem 
+            id="estate_property_type_menu_action"
+            name="Property Type"
+            parent="estate_property_menu_2"
+            sequence="1"
+            action="estate_property_type_action"/>
+        <menuitem 
+            id="estate_property_tag_menu_action"
+            name="Property Tag"
+            parent="estate_property_menu_2"
+            sequence="2"
+            action="estate_property_tag_action"/>
+    </data>
+</odoo>

real_estate/views/estate_property_tag_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <data>
+        <record id="estate_property_tag_view_list" model="ir.ui.view">
+            <field name="name">estate.property.tag.view.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,form</field>
+        </record>
+    </data>
+</odoo>

real_estate/views/estate_property_type_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <data>
+        <record id="estate_property_type_view_list" model="ir.ui.view">
+            <field name="name">estate.property.type.view.list</field>
+            <field name="model">estate.property.type</field>
+            <field name="arch" type="xml">
+                <list string="Property Types">
+                    <field name="name" string="Property Type" />
+                </list>
+            </field>
+        </record>
+
+        <record id="estate_property_type_view_form" model="ir.ui.view">
+            <field name="name">estate.property.type.view.form</field>
+            <field name="model">estate.property.type</field>
+            <field name="arch" type="xml">
+                <form>
+                    <sheet>
+                        <div class="oe_title">
+                            <h1>
+                                <field name="name" placeholder="e.g. House, Apartment" />
+                            </h1>
+                        </div>
+                    </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>
+    </data>
+</odoo>