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This commit is contained in:
Claude Code DTP Worker
2026-08-03 09:22:13 +00:00
parent 1e8cce22a0
commit 9b502e67fe
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"""Cœur métier du module Financement Bancaire : apport initial + gate check.
Fonctions PURES (aucune I/O, aucun horodatage) → testables et déterministes.
Elles matérialisent l'exigence Michel (DIRECTIVE + amendement 2026-08-03) :
AUCUN dossier n'est transmis à la banque tant que les 4 conditions ne sont pas
remplies :
1. apport_initial_complet — dépôt initial (20 % résident RD · 30 % étranger)
intégralement versé et vérifié ;
2. documents_exiges — tous les documents `is_required` de la banque
choisie au statut « Validé WAG » ou « Envoyé banque » ;
3. autorisations_signees — toutes les autorisations signées (date non nulle) ;
4. validation_wag — un conseiller WAG a validé (`wag_validated_by`).
Anti-invention (#6) : les taux d'apport (20/30) et la liste des documents/
autorisations ne sont JAMAIS codés en dur ici — ils proviennent du contrat
`financement_spec.json` via `GateConfig`. Changer le contrat change le gate,
sans toucher ce code.
"""
from __future__ import annotations
from typing import Any
# Ordre canonique des 4 clés de condition du gate (= ordre du contrat / bannière).
CONDITION_KEYS = (
"apport_initial_complet",
"documents_exiges",
"autorisations_signees",
"validation_wag",
)
class GateConfig:
"""Vue en lecture du contrat, indexée pour le calcul du gate."""
def __init__(self, spec: dict) -> None:
self.taux_apport_pct: dict[str, float] = {
rt["code"]: float(rt["taux_apport_pct"])
for rt in spec["apport"]["residence_types"]
}
self.documents: list[dict] = list(spec["documents"])
self.autorisations: list[dict] = list(spec["autorisations"])
self.statuts_recevables: set[str] = set(spec["document_statuses_recevables"])
self.banques: dict[str, dict] = {b["id"]: b for b in spec["banques"]}
@classmethod
def from_spec(cls, spec: dict) -> "GateConfig":
return cls(spec)
def _round1(x: float) -> float:
"""Arrondi à 1 décimale, stable pour un artefact diffable."""
return round(x + 0.0, 1)
def apport_requis_usd(prix_usd: float, residence_type: str, cfg: GateConfig) -> float:
"""Apport requis = prix × taux (20 % résident RD, 30 % étranger)."""
if residence_type not in cfg.taux_apport_pct:
raise KeyError(
f"residence_type {residence_type!r} inconnu "
f"(attendu : {sorted(cfg.taux_apport_pct)})."
)
return round(float(prix_usd) * cfg.taux_apport_pct[residence_type] / 100.0, 2)
def apport_verse_usd(dossier: dict) -> float:
"""Somme des versements enregistrés (0 si aucun)."""
total = 0.0
for p in dossier.get("paiements", []):
total += float(p.get("montant_verse_usd", 0) or 0)
return round(total, 2)
def required_document_ids(residence_type: str, cfg: GateConfig) -> list[str]:
"""Documents `is_required` applicables au type de résidence du client.
Un document est exigé si `is_required` ET (`applies_to` == "all" OU
`applies_to` == residence_type). Les documents « étrangers uniquement » ne
s'appliquent donc pas à un résident RD.
"""
out: list[str] = []
for d in cfg.documents:
if not d.get("is_required"):
continue
applies = d.get("applies_to", "all")
if applies in ("all", residence_type):
out.append(d["id"])
return out
def _cond_apport(dossier: dict, cfg: GateConfig) -> dict:
residence = dossier.get("residence_type")
required = apport_requis_usd(dossier.get("prix_usd", 0), residence, cfg)
paid = apport_verse_usd(dossier)
remaining = round(max(0.0, required - paid), 2)
pct = _round1(min(100.0, (paid / required * 100.0) if required > 0 else 100.0))
return {
"ok": paid + 1e-9 >= required,
"required": required,
"paid": paid,
"remaining": remaining,
"percent": pct,
}
def _cond_documents(dossier: dict, cfg: GateConfig) -> dict:
residence = dossier.get("residence_type")
required_ids = required_document_ids(residence, cfg)
by_id = {d["id"]: d for d in dossier.get("documents", [])}
deposited = 0
validated = 0
for did in required_ids:
statut = (by_id.get(did) or {}).get("statut", "Non déposé")
if statut != "Non déposé":
deposited += 1
if statut in cfg.statuts_recevables:
validated += 1
total = len(required_ids)
pct = _round1((validated / total * 100.0) if total > 0 else 100.0)
return {
"ok": validated == total,
"total": total,
"deposited": deposited,
"validated": validated,
"percent": pct,
}
def _cond_autorisations(dossier: dict, cfg: GateConfig) -> dict:
required_ids = [a["id"] for a in cfg.autorisations]
by_id = {a["id"]: a for a in dossier.get("autorisations", [])}
signed = 0
for aid in required_ids:
if (by_id.get(aid) or {}).get("signature_date"):
signed += 1
total = len(required_ids)
pct = _round1((signed / total * 100.0) if total > 0 else 100.0)
return {"ok": signed == total, "total": total, "signed": signed, "percent": pct}
def _cond_validation_wag(dossier: dict) -> dict:
validated_by = dossier.get("wag_validated_by")
ok = bool(validated_by)
return {"ok": ok, "validated_by": validated_by, "percent": 100.0 if ok else 0.0}
def gate_status(dossier: dict, cfg: GateConfig) -> dict:
"""État complet du gate — forme consommée par le frontend (barres 0-100 %).
Correspond au contrat de l'endpoint
`GET /api/hypotheque/dossier/{id}/gate-status` (DIRECTIVE amendement).
"""
conditions = {
"apport_initial_complet": _cond_apport(dossier, cfg),
"documents_exiges": _cond_documents(dossier, cfg),
"autorisations_signees": _cond_autorisations(dossier, cfg),
"validation_wag": _cond_validation_wag(dossier),
}
can_submit = all(conditions[k]["ok"] for k in CONDITION_KEYS)
completed = sum(1 for k in CONDITION_KEYS if conditions[k]["ok"])
overall = _round1(
sum(conditions[k]["percent"] for k in CONDITION_KEYS) / len(CONDITION_KEYS)
)
return {
"can_submit": can_submit,
"conditions_total": len(CONDITION_KEYS),
"conditions_completed": completed,
"overall_percent": overall,
"conditions": conditions,
}
def can_submit_dossier(dossier: dict, cfg: GateConfig) -> tuple[bool, list[str]]:
"""(peut_soumettre, raisons_de_blocage) — vide si soumissible.
`submit_to_bank()` doit renvoyer 403 + ces raisons tant que la liste n'est
pas vide. Ordre des raisons = ordre canonique des conditions.
"""
status = gate_status(dossier, cfg)
reasons: list[str] = []
c = status["conditions"]
if not c["apport_initial_complet"]["ok"]:
a = c["apport_initial_complet"]
reasons.append(
f"Apport initial incomplet : {a['paid']:.0f}/{a['required']:.0f} USD versés "
f"(reste {a['remaining']:.0f} USD · {a['percent']}%)."
)
if not c["documents_exiges"]["ok"]:
d = c["documents_exiges"]
reasons.append(
f"Documents exigés incomplets : {d['validated']}/{d['total']} validés WAG."
)
if not c["autorisations_signees"]["ok"]:
s = c["autorisations_signees"]
reasons.append(
f"Autorisations non signées : {s['signed']}/{s['total']} signées."
)
if not c["validation_wag"]["ok"]:
reasons.append("Validation WAG manquante (aucun conseiller référent n'a validé).")
return status["can_submit"], reasons