[ADD] estate: Created Estate Module

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': "Real Estate",
+    'description': """Real estate management tutorial module with properties, offers, types and tags.""",
+    'version': '1.0',
+    'license': 'LGPL-3',
+    'summary': 'Real Estate advertisement tutorial module',
+    'depends': ['base'],
+    'author': "Harsh Maniya",
+    'data': [
+       'security/ir.model.access.csv',
+       'views/estate_property_offer_views.xml',
+       'views/estate_property_type_views.xml',
+       'views/estate_property_tag_views.xml',
+       'views/estate_property_views.xml',
+       'views/res_users_views.xml',
+       'views/estate_menus.xml'
+    ],
+    'category': 'Sales/Real Estate',
+    'installable': True,
+    'auto_install': False,
+}

estate/models/__init__.py

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

estate/models/estate_property.py

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+from dateutil.relativedelta import relativedelta
+from datetime import date
+
+from odoo import models, fields, api, exceptions, _
+from odoo.tools.float_utils import float_compare
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "Real Estate Property"
+    _order = "id desc"
+
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(
+        default=lambda self: date.today() + relativedelta(months=3),
+        copy=False
+    )
+    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'),
+        ],
+    )
+    active = fields.Boolean(default=True)
+    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",
+    )
+    salesperson_id = fields.Many2one(
+        "res.users",
+        default=lambda self: self.env.user,
+    )
+    buyer_id = fields.Many2one(
+        "res.partner",
+        copy=False,
+    )
+    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",
+    )
+    _expected_price = models.Constraint(
+        'CHECK(expected_price >= 0)',
+        'The expected price must be positive.',
+    )
+    _selling_price = models.Constraint(
+        'CHECK(selling_price >= 0)',
+        'The selling price must be positive.',
+    )
+
+    @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:
+            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 = None
+
+    def action_cancel_property(self):
+        if self.filtered(lambda rec: rec.state == "sold"):
+            raise exceptions.UserError(_("Sold properties cannot be cancelled."))
+        self.write({"state": "cancelled"})
+        return True
+
+    def action_set_sold(self):
+        for rec in self:
+            if rec.state == "cancelled":
+                raise exceptions.UserError(_("Canceled properties cannot be sold."))
+            else:
+                rec.state = "sold"
+        return True
+
+    @api.constrains("selling_price", "expected_price")
+    def _check_selling_price(self):
+        for rec in self:
+            if rec.selling_price == 0:
+                return False
+            if float_compare(rec.selling_price, rec.expected_price * 0.9, precision_digits=2) < 0:
+                raise exceptions.ValidationError(_(
+                    "The selling price must be at least 90% of the expected price!\n"
+                    "You must reduce the expected price if you want to accept this offer."
+                ))
+
+    @api.ondelete(at_uninstall=False)
+    def _check_property_deletion(self):
+        for rec in self:
+            if rec.state not in ("new", "cancelled"):
+                raise exceptions.UserError(_(
+                    "You can only delete properties in New or Cancelled state."
+                ))

estate/models/estate_property_offer.py

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+from dateutil.relativedelta import relativedelta
+
+from odoo import models, fields, api, exceptions, _
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Real Estate Property Offer"
+    _order = "price desc"
+
+    price = fields.Float(string="Price")
+    status = fields.Selection(
+        selection=[
+            ("accepted", "Accepted"),
+            ("refused", "Refused"),
+        ],
+        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_date_deadline",
+        inverse="_inverse_date_deadline",
+        store=True,
+    )
+    property_type_id = fields.Many2one(
+        related="property_id.property_type_id", store=True
+    )
+    _offer_price = models.Constraint(
+        'CHECK (price > 0)',
+        'Offer price must be greater than 0',
+    )
+
+    @api.depends("validity")
+    def _compute_date_deadline(self):
+        for rec in self:
+            create = rec.create_date or fields.Date.today()
+            rec.date_deadline = (create + relativedelta(days=rec.validity))
+
+    def _inverse_date_deadline(self):
+        for rec in self:
+            create = rec.create_date or fields.Date.today()
+            rec.validity = (rec.date_deadline - fields.Date.today(create)).days
+
+    def action_accept(self):
+        for offer in self:
+            if offer.property_id.buyer_id:
+                raise UserError('Only one offer can be accepted for a property.')
+            offer.status = 'accepted'
+            offer.property_id.selling_price = offer.price
+            offer.property_id.buyer_id = offer.partner_id
+            offer.property_id.state = 'offer_accepted'
+        return True
+
+    def action_refuse(self):
+        for offer in self:
+            offer.status = 'refused'
+        return True
+
+    @api.model
+    def create(self, vals):
+        for rec in vals:
+            property_id = rec.get('property_id')
+            price = rec.get('price', 0.0)
+            if property_id:
+                property_obj = self.env['estate.property'].browse(property_id)
+                best_offer = property_obj.best_price or 0.0
+                if price < best_offer:
+                    raise exceptions.UserError(_(
+                        'Offer price must be greater than or equal to the best offer price.'))
+        return super().create(vals)

estate/models/estate_property_tag.py

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+from odoo import models, fields
+
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Real Estate Property Tag"
+    _order = "name"
+
+    name = fields.Char(required=True)
+    color = fields.Integer()
+
+    _unique_name = models.Constraint(
+        'unique(name)',
+        'The tag name must be unique.',
+    )

estate/models/estate_property_type.py

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+from odoo import models, fields
+
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Real Estate Property Type"
+    _order = "sequence,name"
+
+    name = fields.Char(required=True)
+    property_ids = fields.One2many(
+        "estate.property",
+        "property_type_id",
+    )
+    sequence = fields.Integer(default=1, help="Used to order stages. Lower is better.")
+    offer_ids = fields.One2many("estate.property.offer", "property_type_id")
+    offer_count = fields.Integer(compute="_compute_offer_count")
+
+    _unique_name = models.Constraint(
+        'unique(name)',
+        'The property type name must be unique.',
+    )
+
+    def _compute_offer_count(self):
+        for rec in self:
+            rec.offer_count = len(rec.offer_ids)

estate/models/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",
+        domain=[("state", "=", "new")]
+    )

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_user,access_estate_property_user,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

estate/views/estate_menus.xml

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+<odoo>
+    <menuitem id="menu_estate_root" name="Real Estate" />
+    <menuitem id="menu_estate_advertisements" name="Advertisements" parent="menu_estate_root"
+        sequence="10" />
+    <menuitem id="menu_estate_properties" name="Properties" parent="menu_estate_advertisements"
+        action="action_estate_property" sequence="10" />
+    <menuitem id="menu_estate_settings" name="Settings" parent="menu_estate_root" sequence="20" />
+    <menuitem id="menu_estate_property_types" name="Property Types"
+        parent="menu_estate_settings"
+        action="action_estate_property_type"
+        sequence="10" />
+    <menuitem id="menu_estate_property_tags" name="Property Tags"
+        parent="menu_estate_settings"
+        action="action_estate_property_tag" />
+</odoo>

estate/views/estate_property_offer_views.xml

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+<odoo>
+    <record id="action_estate_property_offer" model="ir.actions.act_window">
+        <field name="name">Property Offers</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="view_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 string="Offers" editable="bottom" decoration-danger="status=='refused'" decoration-success="status=='accepted'">
+                <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="status"/>
+                <button name="action_refuse" string="Refuse" type="object" icon="fa-close" invisible="status"/>
+                <field name="status"/>
+            </list>
+        </field>
+    </record>
+</odoo>

estate/views/estate_property_tag_views.xml

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+<odoo>
+    <record id="action_estate_property_tag" 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>
+        <field name="help" type="html">
+            <p>Create and manage tags for your properties.</p>
+        </field>
+    </record>
+    <record id="view_estate_property_tag_list" 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="Tag" editable="bottom">
+                <field name="name"/>
+                <field name="color"/>
+            </list>
+        </field>
+    </record>
+</odoo>