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"""
Modèles Pydantic pour messages SWIFT.
Ces modèles peuvent être utilisés avec output_type pour valider
automatiquement la structure des messages SWIFT générés.
"""
from pydantic import BaseModel, Field, field_validator
from datetime import datetime
class SWIFTFielBase(BaseModel):
"""Classe de base pour les champs SWIFT."""
pass
class MT103Field32A(BaseModel):
"""Champ :32A: Date de valeur, devise, montant."""
value_date: str = Field(description="Date de valeur YYYYMMDD")
currency: str = Field(description="Code devise ISO 3 lettres")
amount: float = Field(description="Montant", gt=0)
@field_validator("value_date")
def validate_date(cls, v):
if len(v) != 8 or not v.isdigit():
raise ValueError("Date must be YYYYMMDD format")
try:
datetime.strptime(v, "%Y%m%d")
except ValueError:
raise ValueError("Invalid date")
return v
@field_validator("currency")
def validate_currency(cls, v):
if len(v) != 3 or not v.isalpha():
raise ValueError("Currency must be 3 letter ISO code")
return v.upper()
class SWIFTMT103Structured(BaseModel):
"""Message SWIFT MT103 avec validation complète."""
field_20: str = Field(description=":20: Référence du transfert")
field_23B: str = Field(default="CRED", description=":23B: Code instruction")
field_32A: MT103Field32A = Field(description=":32A: Date, devise, montant")
field_50K: str = Field(description=":50K: Ordre donneur")
field_59: str = Field(description=":59: Bénéficiaire")
field_70: str | None = Field(default=None, description=":70: Information pour bénéficiaire")
field_71A: str = Field(default="OUR", description=":71A: Frais (OUR/SHA/BEN)")
@field_validator("field_71A")
def validate_charges(cls, v):
valid = ["OUR", "SHA", "BEN"]
if v not in valid:
raise ValueError(f"Charges must be one of {valid}")
return v
def to_swift_format(self) -> str:
"""Convertit en format SWIFT standard."""
lines = [
f":20:{self.field_20}",
f":23B:{self.field_23B}",
f":32A:{self.field_32A.value_date}{self.field_32A.currency}{self.field_32A.amount:.2f}",
f":50K:/{self.field_50K}",
f":59:/{self.field_59}",
]
if self.field_70:
lines.append(f":70:{self.field_70}")
lines.append(f":71A:{self.field_71A}")
return "\n".join(lines)
# Exemple d'utilisation avec validation
def example_with_validation():
"""Exemple d'utilisation avec validation Pydantic."""
try:
mt103 = SWIFTMT103Structured(
field_20="TXN-2025-001",
field_32A=MT103Field32A(
value_date="20250120",
currency="EUR",
amount=15000.00
),
field_50K="FR76300040000100000000000123\nORDRE DUPONT",
field_59="FR1420041010050500013M02606\nBENEFICIAIRE MARTIN",
field_70="Paiement facture",
field_71A="OUR"
)
print("✅ Message SWIFT validé:")
print(mt103.to_swift_format())
except Exception as e:
print(f"❌ Erreur de validation: {e}")
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