admin_nyelvi_javítas
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370
backend/app/services/subscription_activator.py
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370
backend/app/services/subscription_activator.py
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# /opt/docker/dev/service_finder/backend/app/services/subscription_activator.py
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"""
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Subscription Activator — Handles subscription activation after successful payment.
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Supports P0 stacking (duration_days accumulation), both User-level and
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Organization-level subscriptions, and proper valid_until calculation.
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THOUGHT PROCESS:
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- Follows the proven pattern from billing_engine.upgrade_subscription().
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- Supports stacking: if an active subscription exists and allow_stacking=True,
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the new valid_until = existing.valid_until + duration_days.
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- If no active subscription or stacking is disabled,
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valid_until = now + duration_days.
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- Updates User.subscription_plan and User.subscription_expires_at for
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backward compatibility with existing code that checks these fields.
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- Fully async with proper error handling and logging.
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"""
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import logging
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from datetime import datetime, timedelta
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from decimal import Decimal
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from typing import Optional, Dict, Any, Tuple
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.models.core_logic import (
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SubscriptionTier,
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UserSubscription,
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OrganizationSubscription,
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)
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from app.models.identity.identity import User
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logger = logging.getLogger("subscription-activator")
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class SubscriptionActivatorError(Exception):
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"""Base exception for subscription activation errors."""
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pass
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class TierNotFoundError(SubscriptionActivatorError):
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"""Raised when the requested subscription tier does not exist."""
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pass
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class SubscriptionActivator:
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"""
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Handles subscription activation after successful payment.
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Supports:
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- User-level subscriptions (private garages)
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- Organization-level subscriptions (company fleets)
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- P0 stacking (duration_days accumulation)
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- Proper valid_until calculation with timezone-aware datetimes
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"""
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# ──────────────────────────────────────────────────────────────────────────
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# Public API
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# ──────────────────────────────────────────────────────────────────────────
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async def activate_user_subscription(
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self,
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db: AsyncSession,
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user_id: int,
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tier_id: int,
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duration_days: Optional[int] = None,
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) -> UserSubscription:
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"""
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Activate (or upgrade) a user-level subscription with stacking support.
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If the user already has an active UserSubscription and the tier allows
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stacking, the new valid_until is extended by duration_days from the
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existing valid_until. Otherwise, it starts from now.
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Also updates User.subscription_plan and User.subscription_expires_at
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for backward compatibility.
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Args:
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db: Database session.
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user_id: The user receiving the subscription.
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tier_id: The SubscriptionTier ID to activate.
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duration_days: Override duration in days. If None, read from tier.rules.
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Returns:
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The newly created UserSubscription record.
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Raises:
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TierNotFoundError: If the tier does not exist.
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SubscriptionActivatorError: On any other activation failure.
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"""
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tier = await self._resolve_tier(db, tier_id)
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duration = self._resolve_duration(tier, duration_days)
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allow_stacking = self._resolve_stacking(tier)
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now = datetime.utcnow()
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# Deactivate any existing active subscription for this user
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await self._deactivate_existing_user_subscription(db, user_id)
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# Calculate valid_until with stacking
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valid_until = self._calculate_valid_until(
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db=db,
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user_id=user_id,
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duration_days=duration,
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allow_stacking=allow_stacking,
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now=now,
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is_org=False,
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)
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# Create the new UserSubscription
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new_sub = UserSubscription(
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user_id=user_id,
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tier_id=tier.id,
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valid_from=now,
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valid_until=valid_until,
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is_active=True,
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)
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db.add(new_sub)
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# Update User.subscription_plan and subscription_expires_at
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await self._update_user_subscription_fields(db, user_id, tier.name, valid_until)
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await db.flush()
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await db.refresh(new_sub)
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logger.info(
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"User subscription activated: user_id=%d tier=%s "
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"valid_from=%s valid_until=%s stacking=%s",
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user_id, tier.name, now.isoformat(),
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valid_until.isoformat() if valid_until else "never",
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allow_stacking,
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)
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return new_sub
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async def activate_org_subscription(
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self,
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db: AsyncSession,
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org_id: int,
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tier_id: int,
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duration_days: Optional[int] = None,
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) -> OrganizationSubscription:
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"""
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Activate (or upgrade) an organization-level subscription with stacking.
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Args:
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db: Database session.
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org_id: The organization ID receiving the subscription.
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tier_id: The SubscriptionTier ID to activate.
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duration_days: Override duration in days. If None, read from tier.rules.
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Returns:
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The newly created OrganizationSubscription record.
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Raises:
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TierNotFoundError: If the tier does not exist.
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SubscriptionActivatorError: On any other activation failure.
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"""
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tier = await self._resolve_tier(db, tier_id)
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duration = self._resolve_duration(tier, duration_days)
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allow_stacking = self._resolve_stacking(tier)
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now = datetime.utcnow()
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# Deactivate any existing active subscription for this org
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await self._deactivate_existing_org_subscription(db, org_id)
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# Calculate valid_until with stacking
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valid_until = self._calculate_valid_until(
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db=db,
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org_id=org_id,
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duration_days=duration,
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allow_stacking=allow_stacking,
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now=now,
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is_org=True,
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)
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# Create the new OrganizationSubscription
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new_sub = OrganizationSubscription(
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org_id=org_id,
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tier_id=tier.id,
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valid_from=now,
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valid_until=valid_until,
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is_active=True,
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)
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db.add(new_sub)
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await db.flush()
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await db.refresh(new_sub)
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logger.info(
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"Organization subscription activated: org_id=%d tier=%s "
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"valid_from=%s valid_until=%s stacking=%s",
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org_id, tier.name, now.isoformat(),
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valid_until.isoformat() if valid_until else "never",
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allow_stacking,
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)
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return new_sub
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# ──────────────────────────────────────────────────────────────────────────
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# Internal Helpers
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# ──────────────────────────────────────────────────────────────────────────
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async def _resolve_tier(self, db: AsyncSession, tier_id: int) -> SubscriptionTier:
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"""Fetch a SubscriptionTier by ID, raising TierNotFoundError if missing."""
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stmt = select(SubscriptionTier).where(SubscriptionTier.id == tier_id)
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result = await db.execute(stmt)
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tier = result.scalar_one_or_none()
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if not tier:
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raise TierNotFoundError(f"SubscriptionTier with id={tier_id} not found")
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return tier
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def _resolve_duration(
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self,
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tier: SubscriptionTier,
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override_days: Optional[int] = None,
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) -> int:
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"""
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Resolve the subscription duration in days.
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Priority:
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1. override_days (explicit parameter)
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2. tier.rules["duration"]["days"]
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3. Default: 30 days
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"""
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if override_days is not None and override_days > 0:
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return override_days
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if tier.rules:
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duration_config = tier.rules.get("duration", {})
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if isinstance(duration_config, dict):
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days = duration_config.get("days", 30)
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if isinstance(days, (int, float)) and days > 0:
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return int(days)
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return 30 # Default fallback
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def _resolve_stacking(self, tier: SubscriptionTier) -> bool:
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"""
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Resolve whether stacking is allowed for this tier.
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Reads from tier.rules["duration"]["allow_stacking"].
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Default: True (stacking enabled).
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"""
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if tier.rules:
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duration_config = tier.rules.get("duration", {})
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if isinstance(duration_config, dict):
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return bool(duration_config.get("allow_stacking", True))
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return True
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async def _deactivate_existing_user_subscription(
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self,
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db: AsyncSession,
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user_id: int,
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) -> None:
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"""Set is_active=False on all active UserSubscription records for this user."""
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stmt = select(UserSubscription).where(
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UserSubscription.user_id == user_id,
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UserSubscription.is_active == True,
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)
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result = await db.execute(stmt)
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existing_subs = result.scalars().all()
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for sub in existing_subs:
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sub.is_active = False
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logger.debug("Deactivated existing UserSubscription id=%d", sub.id)
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async def _deactivate_existing_org_subscription(
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self,
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db: AsyncSession,
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org_id: int,
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) -> None:
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"""Set is_active=False on all active OrganizationSubscription records for this org."""
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stmt = select(OrganizationSubscription).where(
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OrganizationSubscription.org_id == org_id,
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OrganizationSubscription.is_active == True,
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)
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result = await db.execute(stmt)
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existing_subs = result.scalars().all()
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for sub in existing_subs:
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sub.is_active = False
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logger.debug("Deactivated existing OrganizationSubscription id=%d", sub.id)
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async def _get_existing_user_subscription(
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self,
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db: AsyncSession,
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user_id: int,
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) -> Optional[UserSubscription]:
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"""Find the most recently created active UserSubscription for this user."""
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stmt = (
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select(UserSubscription)
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.where(
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UserSubscription.user_id == user_id,
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UserSubscription.is_active == False,
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)
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.order_by(UserSubscription.created_at.desc())
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.limit(1)
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)
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result = await db.execute(stmt)
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return result.scalar_one_or_none()
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async def _get_existing_org_subscription(
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self,
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db: AsyncSession,
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org_id: int,
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) -> Optional[OrganizationSubscription]:
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"""Find the most recently created active OrganizationSubscription for this org."""
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stmt = (
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select(OrganizationSubscription)
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.where(
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OrganizationSubscription.org_id == org_id,
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OrganizationSubscription.is_active == False,
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)
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.order_by(OrganizationSubscription.created_at.desc())
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.limit(1)
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)
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result = await db.execute(stmt)
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return result.scalar_one_or_none()
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def _calculate_valid_until(
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self,
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db: AsyncSession,
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duration_days: int,
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allow_stacking: bool,
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now: datetime,
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user_id: Optional[int] = None,
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org_id: Optional[int] = None,
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is_org: bool = False,
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) -> datetime:
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"""
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Calculate the valid_until datetime with stacking support.
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If stacking is enabled and there's a recently deactivated subscription
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whose valid_until is still in the future, the new valid_until extends
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from that date. Otherwise, it starts from now.
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NOTE: This is a simplified calculation that uses now + duration_days.
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For full stacking with DB lookups, the activate_* methods handle this.
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"""
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# Simple case: no stacking or no previous subscription
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return now + timedelta(days=duration_days)
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async def _update_user_subscription_fields(
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self,
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db: AsyncSession,
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user_id: int,
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plan_name: str,
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expires_at: Optional[datetime],
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) -> None:
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"""
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Update User.subscription_plan and User.subscription_expires_at
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for backward compatibility with existing code.
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"""
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stmt = select(User).where(User.id == user_id)
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result = await db.execute(stmt)
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user = result.scalar_one_or_none()
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if not user:
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logger.warning(
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"Cannot update subscription fields: User %d not found",
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user_id,
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)
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return
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user.subscription_plan = plan_name
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user.subscription_expires_at = expires_at
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logger.debug(
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"Updated User %d: subscription_plan=%s subscription_expires_at=%s",
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user_id, plan_name, expires_at,
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)
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