[ADD] estate: started the server framework, completed the coding guidelines, setup guide, and chapter 1

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    "name": "real estate",
+    "version": "1.0",
+    "summary": "Estate management",
+    "description": "Estate management",
+    "author": "Odoo S.A.",
+    "category": "tutorials",
+    "depends": ["base"],
+    "data": [
+        "security/ir.model.access.csv",
+        "views/estate_property_views.xml",
+        "views/estate_property_offer_views.xml",
+        "views/estate_property_type_views.xml",
+        "views/estate_property_tag_views.xml",
+        "views/estate_menus.xml",
+        "views/res_users_views.xml",
+    ],
+    "license": "LGPL-3",
+    "application": True,
+    "installable": True
+}

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 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"
+    _order = "id desc"
+
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(
+        default=lambda self: (
+            fields.Date.today() + relativedelta(months=3)
+        )
+    )
+    expected_price = fields.Float()
+    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()
+    total_area = fields.Integer(compute="_compute_total")
+    best_offer = fields.Float(
+        string="Best Offer", compute="_compute_best_offer")
+    garden_orientation = fields.Selection(
+        [
+            ('north', "North"),
+            ('south', "South"),
+            ('east', "East"),
+            ('west', "West"),
+        ]
+    )
+    active = fields.Boolean(default=True)
+    state = fields.Selection(
+        [
+            ('new', "New"),
+            ('offer_received', "Offer Received"),
+            ('offer_accepted', "Offer Accepted"),
+            ('sold', "Sold"),
+            ('canceled', "Canceled"),
+        ],
+        required=True,
+        copy=False,
+        default="new",
+    )
+    buyer_id = fields.Many2one(
+        "res.partner",
+        string="Buyer",
+        copy=False,
+    )
+    salesperson_id = fields.Many2one(
+        "res.users",
+        string="Salesperson",
+        default=lambda self: self.env.user,
+    )
+    property_type_id = fields.Many2one(
+        "estate.property.type",
+        string="Property Type",
+    )
+    tag_ids = fields.Many2many(
+        "estate.property.tag",
+        string="Tags",
+    )
+    offer_ids = fields.One2many(
+        "estate.property.offer",
+        "property_id",
+        string="Offer",
+    )
+
+    _check_expected_price = models.Constraint(
+        "CHECK(expected_price>0)", "Expected price must be strictly positive"
+    )
+
+    _check_selling_price = models.Constraint(
+        "CHECK(selling_price>0)", "Selling price must be positive"
+    )
+
+    @api.depends("living_area", "garden_area")
+    def _compute_total(self):
+        for record in self:
+            record.total_area = record.living_area + record.garden_area
+
+    @api.depends("offer_ids.price")
+    def _compute_best_offer(self):
+        for record in self:
+            if record.offer_ids:
+                record.best_offer = max(record.offer_ids.mapped("price"))
+            else:
+                record.best_offer = 0
+
+    @api.constrains("expected_price", "selling_price")
+    def _check_selling_price(self):
+        for record in self:
+            if float_is_zero(record.selling_price, precision_digits=2):
+                continue
+            if (
+                float_compare(
+                    record.selling_price,
+                    record.expected_price * 0.9,
+                    precision_digits=2,
+                )
+                < 0
+            ):
+                raise ValidationError(
+                    _("Selling price cannot be lower than 90% of the expected price"))
+
+    @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
+
+    @api.ondelete(at_uninstall=False)
+    def _unlink_check_state(self):
+        for record in self:
+            if record.state not in ('new', 'canceled'):
+                raise UserError(
+                    _("Only New or Cancelled properties can be deleted"))
+        return True
+
+    def action_sold(self):
+        for record in self:
+            if record.state == "canceled":
+                raise UserError(_("Canceled Property cannot be sold"))
+            record.state = "sold"
+        return True
+
+    def action_cancel(self):
+        for record in self:
+            if record.state == "sold":
+                raise UserError(_("Sold Property cannot be canceled"))
+            record.state = "canceled"
+        return True

estate/models/estate_property_offer.py

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+from dateutil.relativedelta import relativedelta
+
+from odoo import api, fields, models, _
+from odoo.exceptions import UserError
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Property Offers"
+    _order = "price desc"
+
+    price = fields.Float()
+    status = fields.Selection(
+        [
+            ('accepted', "Accepted"),
+            ('refused', "Refused"),
+        ],
+        copy=False,
+    )
+    partner_id = fields.Many2one(
+        'res.partner',
+        required=True,
+    )
+    property_id = fields.Many2one(
+        'estate.property',
+        required=True,
+    )
+    property_type_id = fields.Many2one(
+        related="property_id.property_type_id", store=True)
+    validity = fields.Integer(default=7)
+    date_deadline = fields.Date(
+        compute='_compute_date_deadline',
+        inverse='_inverse_date_deadline',
+        store=True,
+    )
+
+    _check_price = models.Constraint(
+        'CHECK(price>0)', 'Price must be positive')
+
+    @api.depends('create_date', 'validity')
+    def _compute_date_deadline(self):
+        for record in self:
+            if record.create_date:
+                record.date_deadline = (
+                    record.create_date.date() + relativedelta(days=record.validity)
+                )
+            else:
+                record.date_deadline = (
+                    fields.Date.today() + relativedelta(days=record.validity)
+                )
+
+    def _inverse_date_deadline(self):
+        for record in self:
+            if record.date_deadline:
+                if record.create_date:
+                    delta = (
+                        record.date_deadline - record.create_date.date()
+                    )
+                    record.validity = delta.days
+                else:
+                    delta = (
+                        record.date_deadline - fields.Date.today()
+                    )
+                    record.validity = delta.days
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            current_price = vals.get('price')
+            property_id = self.env['estate.property'].browse(
+                vals['property_id'])
+            for offer in property_id.offer_ids:
+                if current_price < offer.price:
+                    raise UserError(_(
+                        "The offer must be higher than the current highest offer."))
+            if property_id.state == 'new':
+                property_id.state = 'offer_received'
+
+        return super().create(vals_list)
+
+    def action_confirm(self):
+        for offer in self.property_id.offer_ids:
+            if self != offer and offer.status == 'accepted':
+                raise UserError(_("An offer is already accepted."))
+        self.status = "accepted"
+        self.property_id.state = "offer_accepted"
+        self.property_id.selling_price = self.price
+        self.property_id.buyer_id = self.partner_id
+        return True
+
+    def action_refuse(self):
+        for record in self:
+            record.status = "refused"
+        return True

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Property Tags"
+    _order = "name"
+
+    name = fields.Char(required=True)
+    color = fields.Integer()
+
+    _unique_price = models.Constraint(
+        "UNIQUE(name)", "Property tag must 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 = "Property Types"
+    _order = "sequence, name"
+
+    name = fields.Char(required=True)
+    sequence = fields.Integer(string="Sequence", default=1)
+    property_ids = fields.One2many(
+        "estate.property",
+        "property_type_id",
+    )
+    offer_ids = fields.One2many(
+        "estate.property.offer",
+        "property_type_id",
+    )
+    offer_count = fields.Integer(compute="_compute_offer_count")
+
+    _unique_name = models.Constraint(
+        "UNIQUE(name)", "Property type name must 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 ResUsers(models.Model):
+    _inherit = "res.users"
+
+    property_ids = fields.One2many(
+        "estate.property",
+        "salesperson_id",
+        string="My Properties",
+        domain=[('state', '!=', 'sold')]
+    )

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

estate/views/estate_menus.xml

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+<odoo>
+
+    <menuitem
+        id="estate_menu_root"
+        name="Real Estate"
+    />
+
+    <menuitem
+        id="estate_property_menu"
+        name="Advertisement"
+        parent="estate_menu_root"
+    />
+
+    <menuitem
+        id="estate_property_action_menu"
+        name="Property List"
+        parent="estate_property_menu"
+        action="estate_property_action"
+    />
+
+    <menuitem
+        id="estate_property_type_menu"
+        name="Settings"
+        parent="estate_menu_root"
+    />
+
+    <menuitem
+        id="estate_property_type_list_menu"
+        name="Property Type"
+        parent="estate_property_type_menu"
+        action="estate_property_type_action"
+    />
+    <menuitem
+        id="estate_property_tag_menu"
+        name="Property Tags"
+        parent="estate_property_type_menu"
+        action="estate_property_tag_action"
+    />
+</odoo>