Initial commit

Fusion Accounting/models/account_fiscal_year.py

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+# Fusion Accounting - Fiscal Year Management
+# Defines company-specific fiscal year periods with overlap validation
+
+from odoo import api, fields, models, _
+from odoo.exceptions import ValidationError
+
+
+class FusionFiscalYear(models.Model):
+    """Represents a fiscal year period for a company. Enforces
+    non-overlapping date ranges and prevents child-company assignments."""
+
+    _name = 'account.fiscal.year'
+    _description = 'Fiscal Year'
+
+    name = fields.Char(
+        string='Name',
+        required=True,
+    )
+    date_from = fields.Date(
+        string='Start Date',
+        required=True,
+        help='First day of the fiscal year (inclusive).',
+    )
+    date_to = fields.Date(
+        string='End Date',
+        required=True,
+        help='Last day of the fiscal year (inclusive).',
+    )
+    company_id = fields.Many2one(
+        comodel_name='res.company',
+        string='Company',
+        required=True,
+        default=lambda self: self.env.company,
+    )
+
+    @api.constrains('date_from', 'date_to', 'company_id')
+    def _validate_fiscal_year_dates(self):
+        """Ensure fiscal years do not overlap for the same company and
+        that the date range is logically ordered. Fiscal years on child
+        companies are disallowed.
+
+        Overlap scenarios checked:
+            s1  s2  e1  e2   ->  new starts inside existing
+            s2  s1  e2  e1   ->  existing starts inside new
+            s1  s2  e2  e1   ->  existing fully inside new
+        """
+        for fiscal_year in self:
+            if fiscal_year.date_to < fiscal_year.date_from:
+                raise ValidationError(
+                    _('The end date cannot be earlier than the start date.')
+                )
+
+            if fiscal_year.company_id.parent_id:
+                raise ValidationError(
+                    _('Fiscal years cannot be defined on subsidiary companies.')
+                )
+
+            overlap_domain = [
+                ('id', '!=', fiscal_year.id),
+                ('company_id', '=', fiscal_year.company_id.id),
+                '|', '|',
+                '&', ('date_from', '<=', fiscal_year.date_from), ('date_to', '>=', fiscal_year.date_from),
+                '&', ('date_from', '<=', fiscal_year.date_to), ('date_to', '>=', fiscal_year.date_to),
+                '&', ('date_from', '<=', fiscal_year.date_from), ('date_to', '>=', fiscal_year.date_to),
+            ]
+
+            if self.search_count(overlap_domain) > 0:
+                raise ValidationError(
+                    _('Fiscal years for the same company must not overlap. '
+                      'Please adjust the start or end dates.')
+                )