[ADD] estate: adding new estate module

estate/__init__.py

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+from . import models
+from . import security
+from . import views

estate/__manifest__.py

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+{
+    "name": "estate",
+    "license": "LGPL-3",
+    "application": True,
+    "depends": [
+        "base",
+    ],
+    "data": [
+        "views/estate_offer_views.xml",
+        "views/estate_property_type_views.xml",
+        "views/estate_property_tags_views.xml",
+        "views/estate_property_views.xml",
+        "views/res_users_views.xml",
+        "views/estate_menus.xml",
+        "security/ir.model.access.csv",
+    ],
+}

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 datetime import date
+
+from odoo import fields, models, api, _
+from odoo.tools import date_utils, float_utils
+from odoo.exceptions import UserError, ValidationError
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "A property module that adds the property as a listing"
+    _sql_constraints = [
+        (
+            "check_expected_price",
+            "CHECK(expected_price > 0)",
+            "Expected price of a property should be only positive",
+        ),
+        (
+            "check_selling_price",
+            "CHECK(selling_price >= 0)",
+            "Selling price of a property should be positive",
+        ),
+    ]
+    _order = "id desc"
+
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(
+        copy=False, default=lambda _: date_utils.add(date.today(), 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(
+        string="Orientation",
+        selection=[
+            ("north", "North"),
+            ("south", "South"),
+            ("east", "East"),
+            ("west", "West"),
+        ],
+    )
+    total_area = fields.Float(compute="_compute_total_area")
+    active = fields.Boolean(default=True)
+    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",
+    )
+    property_type_id = fields.Many2one("estate.property.type")
+    buyer_id = fields.Many2one("res.partner", copy=False)
+    seller_id = fields.Many2one(
+        "res.users", name="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(
+        compute="_compute_best_price", readonly=True, string="Best Offer"
+    )
+
+    @api.depends("living_area", "garden_area")
+    def _compute_total_area(self):
+        for single_property in self:
+            single_property.total_area = (
+                single_property.living_area + single_property.garden_area
+            )
+
+    @api.depends("offer_ids.price")
+    def _compute_best_price(self):
+        for single_property in self:
+            single_property.best_price = max(single_property.offer_ids.mapped("price"), default=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_property_cancel(self):
+        for single_property in self:
+            if single_property.state == "sold":
+                raise UserError(_("Sold properties cannot be cancelled!"))
+            single_property.state = "cancelled"
+        return True
+
+    def action_property_sold(self):
+        for single_property in self:
+            if single_property.state == "cancelled":
+                raise UserError(_("Cancelled properties cannot be sold!"))
+            single_property.state = "sold"
+        return True
+
+    @api.constrains("selling_price", "expected_price")
+    def check_selling_price_in_range(self):
+        for single_property in self:
+            if not float_utils.float_is_zero(single_property.selling_price, precision_rounding=0.1):
+                if single_property.selling_price < (0.9 * single_property.expected_price):
+                    raise ValidationError(_("Selling price cannot be lower than 90%% of Expected price"))
+        return True
+
+    @api.ondelete(at_uninstall=False)
+    def _unlink_check_property_state(self):
+        for single_property in self:
+            if single_property.state not in ["new", "cancelled"]:
+                raise UserError(_("Property cannot be deleted unless it is new or cancelled"))
+        return True

estate/models/estate_property_offer.py

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+from datetime import date
+
+from odoo import fields, models, api, _
+from odoo.tools import date_utils
+from odoo.exceptions import UserError
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Offers made on a listing"
+    _sql_constraints = [
+        (
+            "check_price",
+            "CHECK(price > 0)",
+            "Price of an offer should be only positive",
+        ),
+    ]
+    _order = "price desc"
+
+    price = fields.Float()
+    status = fields.Selection(
+        string="Status",
+        selection=[
+            ("accepted", "Accepted"),
+            ("refused", "Refused"),
+        ],
+        copy=False,
+    )
+    partner_id = fields.Many2one("res.partner", string="Buyer", 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
+    )
+    validity = fields.Integer(default=7, string="Validity (days)")
+    date_deadline = fields.Date(
+        compute="_compute_date_deadline",
+        inverse="_inverse_date_deadline",
+        string="Deadline",
+    )
+
+    @api.depends("validity")
+    def _compute_date_deadline(self):
+        for offer in self:
+            create_date_actual = (
+                date.today() if not offer.create_date else offer.create_date.date()
+            )
+            offer.date_deadline = date_utils.add(
+                create_date_actual, days=offer.validity
+            )
+
+    def _inverse_date_deadline(self):
+        for offer in self:
+            create_date_actual = (
+                date.today() if not offer.create_date else offer.create_date.date()
+            )
+            offer.validity = (offer.date_deadline - create_date_actual).days
+
+    def action_offer_accept(self):
+        for offer in self:
+            offer.status = "accepted"
+            if self.property_id.state in ("offer-accepted", "sold"):
+                self.status = False
+                raise UserError(_("An offer has already been accepted!"))
+            else:
+                self.property_id.write({"state": "offer-accepted", "selling_price": self.price, "buyer_id": self.partner_id})
+        return True
+
+    @api.depends("status")
+    def action_offer_refuse(self):
+        self.status = "refused"
+        return True
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            single_property = self.env["estate.property"].browse(vals["property_id"])
+            price = vals.get("price")
+            if price is not None and price < single_property.best_price:
+                raise UserError(_("An offer cannot be lower than an existing offer"))
+            single_property.state = "offer-received"
+        return super().create(vals_list)

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Adds different property tags"
+    _sql_constraints = [
+        (
+            "property_tag_unique",
+            "UNIQUE (name)",
+            "Property Tag already exists.",
+        ),
+    ]
+    _order = "name"
+
+    name = fields.Char(required=True)
+    color = fields.Integer()

estate/models/estate_property_type.py

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+from odoo import fields, models, api
+
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Adds different property types"
+    _sql_constraints = [
+        (
+            "property_type_unique",
+            "UNIQUE (name)",
+            "Property Type already exists.",
+        ),
+    ]
+    _order = "sequence, name"
+
+    name = fields.Char(required=True)
+    property_ids = fields.One2many(
+        "estate.property", "property_type_id", string="Properties"
+    )
+    sequence = fields.Integer(
+        "Sequence", default=1, help="Used to order stages. Lower is better."
+    )
+    offer_ids = fields.One2many(
+        "estate.property.offer", "property_type_id", string="Offers"
+    )
+    offer_count = fields.Integer(
+        compute="_compute_offer_count", string="Number of Offers"
+    )
+
+    @api.depends("offer_ids")
+    def _compute_offer_count(self):
+        for property_type in self:
+            property_type.offer_count = len(property_type.offer_ids)

estate/models/res_users.py

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+from odoo import fields, models
+
+
+class ResUsers(models.Model):
+    _inherit = "res.users"
+
+    property_ids = fields.One2many(
+        "estate.property",
+        "seller_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
+estate.access_estate_property,access_estate_property,estate.model_estate_property,base.group_user,1,1,1,1
+estate.access_estate_property_type,access_estate_property_type,estate.model_estate_property_type,base.group_user,1,1,1,1
+estate.access_estate_property_tag,access_estate_property_tag,estate.model_estate_property_tag,base.group_user,1,1,1,1
+estate.access_estate_property_offer,access_estate_property_offer,estate.model_estate_property_offer,base.group_user,1,1,1,1

estate/views/estate_menus.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <menuitem id="estate_menu_root" name="Real Estate">
+        <menuitem id="estate_ads_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_offer_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <record id="estate_property_offer_view_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="Type">
+                <group>
+                    <field name="price"/>
+                    <field name="partner_id" string="Partner"/>
+                    <field name="validity"/>
+                    <field name="date_deadline"/>
+                </group>
+            </form>
+        </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 string="Offers" editable="top" decoration-success="status == 'accepted'" decoration-danger="status == 'refused'">
+                <field name="price"/>
+                <field name="partner_id" string="Partner"/>
+                <field name="validity"/>
+                <field name="date_deadline"/>
+                <button name="action_offer_accept" type="object" icon="fa-check" title="accept" invisible="status in ['accepted', 'refused']"/>
+                <button name="action_offer_refuse" type="object" icon="fa-times" title="refuse" invisible="status in ['accepted', 'refused']"/>
+                <field name="status" optional="hidden" invisible="1"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="estate_property_offer_action" model="ir.actions.act_window">
+        <field name="name">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>
+</odoo>

estate/views/estate_property_tags_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <record id="estate_property_tag_view_form" model="ir.ui.view">
+        <field name="name">estate.property.tag.form</field>
+        <field name="model">estate.property.tag</field>
+        <field name="arch" type="xml">
+            <form string="Type">
+                <sheet>
+                    <h1>
+                        <field name="name"/>
+                    </h1>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+    <record id="estate_property_tag_view_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="Type" editable="top">
+                <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>
+</odoo>