[ADD] event_service_base: base module for event service core models

event_service_base/__init__.py

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+from . import models

event_service_base/__manifest__.py

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+{
+    'name': 'Event Service Base',
+    'summary': 'Foundational business logic for service event management',
+    'description': """
+Provides the foundational models and business logic for
+service events and bookings, intended to be extended
+by other modules.
+""",
+    'version': '1.0',
+    'author': 'Dhruv',
+    'license': 'LGPL-3',
+}

event_service_base/models/__init__.py

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+from . import event_service
+from . import event_service_registration

event_service_base/models/event_service.py

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+from community.odoo import fields, models
+
+
+class EventService(models.Model):
+    _name = "event.service"
+    _description = "Event Service"
+
+    name = fields.Char(string="Name", required=True, index=True)
+    description = fields.HTML(string="Description")
+    price = fields.Float(string="Price", default=0.0)
+    active = fields.Boolean(string="Active", default=True)
+    category_id = fields.Many2one("event.service.category", string="Category", ondelete="restrict")
+    tag_ids = fields.Many2many("event.service.tag", string="Tags")
+    company_id = fields.Many2one("res.company", default=lambda self: self.env.company)
+    booking_ids = fields.One2many("event.service.registration", "service_id", string="Bookings")
+
+class EventServiceCategory(models.Model):
+    _name = "event.service.category"
+    _description = "Event Service Category"
+
+    name = fields.Char(required=True)
+    active = fields.Boolean(default=True)
+
+class EventServiceTag(models.Model):
+    _name = "event.service.tag"
+    _description = "Event Service Tag"
+
+    name = fields.Char(required=True)
+    color = fields.Integer()

event_service_base/models/event_service_registration.py

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+from odoo import api, fields, models
+from odoo.exceptions import ValidationError
+
+
+class EventServiceRegistration(models.Model):
+    _name = "event.service.registration"
+    _description = "Event Service Registration"
+
+    name = fields.Char(string="Event Name", readonly=True, copy=False)
+    quantity = fields.Integer(string="Number of Attendees", default=1)
+    currency_id = fields.Many2one("res.currency", related="company_id.currency_id", readonly=True)
+    amount = fields.Monetary(string="Total Amount", compute="_compute_amount", store=True, currency_field="currency_id")
+    booking_date = fields.Datetime(string="Booking Date", default=fields.Datetime.now, required=True)
+    state = fields.Selection([
+        ('draft', 'Draft'),
+        ('confirmed', 'Confirmed'),
+        ('cancelled', 'Cancelled')
+    ], default = 'draft', readonly=True)
+    partner_id = fields.Many2one("res.partner", string="Partner", required=True, ondelete="restrict")
+    service_id = fields.Many2one("event.service", string="Service", required=True, ondelete="restrict")
+    company_id = fields.Many2one("res.company", default=lambda self: self.env.company, ondelete="restrict")
+
+    _unique_booking = models.Constraint(
+        "unique(partner_id, service_id)",
+        "You cannot register the same service twice.",
+    )
+
+    @api.constrains("quantity")
+    def _check_quantity(self):
+        for record in self:
+            if record.quantity <= 0:
+                raise ValidationError(
+                    "Number of attendees must be greater than zero."
+                )
+
+    @api.depends('service_id.price', 'quantity')
+    def _compute_amount(self):
+        for record in self:
+            record.amount = record.quantity * record.service_id.price
+
+    @api.constrains("company_id", "service_id")
+    def _check_company_consistency(self):
+        for record in self:
+            if (
+                record.service_id
+                and record.service_id.company_id != record.company_id
+            ):
+                raise ValidationError(
+                    "The service and the booking must belong to the same company."
+                )
+
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            if not vals.get("name"):
+                vals["name"] = self.env["ir.sequence"].next_by_code(
+                    "event.service.registration"
+                )
+        return super().create(vals_list)
+
+    @api.constrains("booking_date")
+    def _check_booking_date(self):
+        now = fields.Datetime.now()
+        for record in self:
+            if record.booking_date and record.booking_date < now:
+                raise ValidationError(
+                    "The booking date cannot be in the past."
+                )

event_service_base/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_event_service_registration_user,event.service.registration user,model_event_service_registration,base.group_user,1,1,1,1
+access_event_service_user,event.service user,model_event_service,base.group_user,1,1,1,1
+access_event_service_category_user,event.service.category user,model_event_service_category,base.group_user,1,1,1,0
+access_event_service_tag_user,event.service.tag user,model_event_service_tag,base.group_user,1,1,1,0

event_service_website/__init__.py

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+from . import models

event_service_website/__manifest__.py

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+{
+    'name': 'Event Service Website',
+    'summary': 'Manage event services and customer bookings',
+    'description': """
+- Definition of event services with pricing
+- Service categories and tags
+- Customer registrations for services
+- Core business rules and validations for bookings
+
+""",
+    'version': '1.0',
+    'depends': ['event_service_base', 'website', 'portal'],
+    'author': 'Dhruv',
+    'installable': True,
+    'application': True,
+    'license': 'LGPL-3',
+}