EnCoach Odoo 19 custom modules

Full backend implementation with custom Odoo modules:
- encoach_api: Core API, user management, JWT auth
- encoach_exam: Exam generation (reading, writing, listening, speaking)
- encoach_evaluate: AI-powered evaluation (writing, speaking)
- encoach_training: Training tips and walkthrough
- encoach_storage: File storage management
- encoach_payment: Stripe, PayPal, Paymob integration
- encoach_mail: Email notifications

Made-with: Cursor

encoach_subscription/models/discount.py

@@ -0,0 +1,24 @@
+from odoo import fields, models
+
+
+class EncoachDiscount(models.Model):
+    _name = "encoach.discount"
+    _description = "EnCoach Discount Code"
+    code = fields.Char(required=True, index=True)
+
+    _code_unique = models.Constraint(
+        "UNIQUE(code)",
+        "Discount code must be unique.",
+    )
+    percentage = fields.Float(digits=(5, 2))
+    expiry_date = fields.Datetime()
+    max_uses = fields.Integer()
+    uses = fields.Integer(default=0)
+
+    def is_valid(self):
+        self.ensure_one()
+        if self.max_uses and self.uses >= self.max_uses:
+            return False
+        if self.expiry_date and self.expiry_date < fields.Datetime.now():
+            return False
+        return True