feat(loyalty): implement complete loyalty module MVP
Add stamp-based and points-based loyalty programs for vendors with: Database Models (5 tables): - loyalty_programs: Vendor program configuration - loyalty_cards: Customer cards with stamp/point balances - loyalty_transactions: Immutable audit log - staff_pins: Fraud prevention PINs (bcrypt hashed) - apple_device_registrations: Apple Wallet push tokens Services: - program_service: Program CRUD and statistics - card_service: Customer enrollment and card lookup - stamp_service: Stamp operations with anti-fraud checks - points_service: Points earning and redemption - pin_service: Staff PIN management with lockout - wallet_service: Unified wallet abstraction - google_wallet_service: Google Wallet API integration - apple_wallet_service: Apple Wallet .pkpass generation API Routes: - Admin: /api/v1/admin/loyalty/* (programs list, stats) - Vendor: /api/v1/vendor/loyalty/* (stamp, points, cards, PINs) - Public: /api/v1/loyalty/* (enrollment, Apple Web Service) Anti-Fraud Features: - Staff PIN verification (configurable per program) - Cooldown period between stamps (default 15 min) - Daily stamp limits (default 5/day) - PIN lockout after failed attempts Wallet Integration: - Google Wallet: LoyaltyClass and LoyaltyObject management - Apple Wallet: .pkpass generation with PKCS#7 signing - Apple Web Service endpoints for device registration/updates Also includes: - Alembic migration for all tables with indexes - Localization files (en, fr, de, lu) - Module documentation - Phase 2 interface and user journey plan Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
388
app/modules/loyalty/services/apple_wallet_service.py
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388
app/modules/loyalty/services/apple_wallet_service.py
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# app/modules/loyalty/services/apple_wallet_service.py
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"""
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Apple Wallet service.
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Handles Apple Wallet integration including:
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- Generating .pkpass files
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- Apple Web Service for device registration
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- Push notifications for pass updates
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"""
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import hashlib
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import io
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import json
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import logging
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import zipfile
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from typing import Any
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from sqlalchemy.orm import Session
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from app.modules.loyalty.config import config
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from app.modules.loyalty.exceptions import (
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AppleWalletNotConfiguredException,
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WalletIntegrationException,
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)
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from app.modules.loyalty.models import AppleDeviceRegistration, LoyaltyCard, LoyaltyProgram
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logger = logging.getLogger(__name__)
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class AppleWalletService:
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"""Service for Apple Wallet integration."""
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@property
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def is_configured(self) -> bool:
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"""Check if Apple Wallet is configured."""
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return bool(
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config.apple_pass_type_id
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and config.apple_team_id
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and config.apple_wwdr_cert_path
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and config.apple_signer_cert_path
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and config.apple_signer_key_path
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)
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# =========================================================================
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# Pass Generation
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# =========================================================================
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def generate_pass(self, db: Session, card: LoyaltyCard) -> bytes:
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"""
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Generate a .pkpass file for a loyalty card.
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The .pkpass is a ZIP file containing:
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- pass.json: Pass configuration
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- icon.png, icon@2x.png: App icon
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- logo.png, logo@2x.png: Logo on pass
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- manifest.json: SHA-1 hashes of all files
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- signature: PKCS#7 signature
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Args:
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db: Database session
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card: Loyalty card
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Returns:
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Bytes of the .pkpass file
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"""
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if not self.is_configured:
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raise AppleWalletNotConfiguredException()
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program = card.program
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# Ensure serial number is set
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if not card.apple_serial_number:
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card.apple_serial_number = f"card_{card.id}_{card.qr_code_data[:8]}"
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db.commit()
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# Build pass.json
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pass_data = self._build_pass_json(card, program)
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# Create the pass package
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pass_files = {
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"pass.json": json.dumps(pass_data).encode("utf-8"),
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}
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# Add placeholder images (in production, these would be actual images)
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# For now, we'll skip images and use the pass.json only
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# pass_files["icon.png"] = self._get_icon_bytes(program)
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# pass_files["icon@2x.png"] = self._get_icon_bytes(program, scale=2)
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# pass_files["logo.png"] = self._get_logo_bytes(program)
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# pass_files["logo@2x.png"] = self._get_logo_bytes(program, scale=2)
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# Create manifest
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manifest = {}
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for filename, content in pass_files.items():
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manifest[filename] = hashlib.sha1(content).hexdigest()
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pass_files["manifest.json"] = json.dumps(manifest).encode("utf-8")
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# Sign the manifest
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try:
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signature = self._sign_manifest(pass_files["manifest.json"])
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pass_files["signature"] = signature
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except Exception as e:
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logger.error(f"Failed to sign pass: {e}")
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raise WalletIntegrationException("apple", f"Failed to sign pass: {e}")
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# Create ZIP file
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buffer = io.BytesIO()
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with zipfile.ZipFile(buffer, "w", zipfile.ZIP_DEFLATED) as zf:
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for filename, content in pass_files.items():
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zf.writestr(filename, content)
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return buffer.getvalue()
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def _build_pass_json(self, card: LoyaltyCard, program: LoyaltyProgram) -> dict[str, Any]:
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"""Build the pass.json structure for a loyalty card."""
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pass_data = {
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"formatVersion": 1,
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"passTypeIdentifier": config.apple_pass_type_id,
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"serialNumber": card.apple_serial_number,
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"teamIdentifier": config.apple_team_id,
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"organizationName": program.display_name,
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"description": f"{program.display_name} Loyalty Card",
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"backgroundColor": self._hex_to_rgb(program.card_color),
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"foregroundColor": "rgb(255, 255, 255)",
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"labelColor": "rgb(255, 255, 255)",
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"authenticationToken": card.apple_auth_token,
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"webServiceURL": self._get_web_service_url(),
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"barcode": {
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"message": card.qr_code_data,
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"format": "PKBarcodeFormatQR",
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"messageEncoding": "iso-8859-1",
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},
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"barcodes": [
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{
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"message": card.qr_code_data,
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"format": "PKBarcodeFormatQR",
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"messageEncoding": "iso-8859-1",
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}
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],
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}
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# Add loyalty-specific fields
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if program.is_stamps_enabled:
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pass_data["storeCard"] = {
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"headerFields": [
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{
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"key": "stamps",
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"label": "STAMPS",
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"value": f"{card.stamp_count}/{program.stamps_target}",
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}
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],
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"primaryFields": [
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{
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"key": "reward",
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"label": "NEXT REWARD",
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"value": program.stamps_reward_description,
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}
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],
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"secondaryFields": [
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{
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"key": "progress",
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"label": "PROGRESS",
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"value": f"{card.stamp_count} stamps collected",
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}
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],
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"backFields": [
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{
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"key": "cardNumber",
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"label": "Card Number",
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"value": card.card_number,
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},
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{
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"key": "totalStamps",
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"label": "Total Stamps Earned",
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"value": str(card.total_stamps_earned),
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},
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{
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"key": "redemptions",
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"label": "Total Rewards",
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"value": str(card.stamps_redeemed),
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},
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],
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}
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elif program.is_points_enabled:
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pass_data["storeCard"] = {
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"headerFields": [
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{
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"key": "points",
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"label": "POINTS",
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"value": str(card.points_balance),
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}
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],
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"primaryFields": [
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{
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"key": "balance",
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"label": "BALANCE",
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"value": f"{card.points_balance} points",
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}
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],
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"backFields": [
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{
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"key": "cardNumber",
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"label": "Card Number",
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"value": card.card_number,
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},
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{
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"key": "totalPoints",
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"label": "Total Points Earned",
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"value": str(card.total_points_earned),
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},
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{
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"key": "redeemed",
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"label": "Points Redeemed",
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"value": str(card.points_redeemed),
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},
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],
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}
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return pass_data
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def _hex_to_rgb(self, hex_color: str) -> str:
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"""Convert hex color to RGB format for Apple Wallet."""
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hex_color = hex_color.lstrip("#")
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r = int(hex_color[0:2], 16)
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g = int(hex_color[2:4], 16)
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b = int(hex_color[4:6], 16)
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return f"rgb({r}, {g}, {b})"
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def _get_web_service_url(self) -> str:
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"""Get the base URL for Apple Web Service endpoints."""
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# This should be configured based on your deployment
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# For now, return a placeholder
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from app.core.config import settings
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base_url = getattr(settings, "BASE_URL", "https://api.example.com")
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return f"{base_url}/api/v1/loyalty/apple"
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def _sign_manifest(self, manifest_data: bytes) -> bytes:
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"""
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Sign the manifest using PKCS#7.
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This requires the Apple WWDR certificate and your
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pass signing certificate and key.
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"""
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try:
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from cryptography import x509
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from cryptography.hazmat.primitives import hashes, serialization
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from cryptography.hazmat.primitives.serialization import pkcs7
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# Load certificates
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with open(config.apple_wwdr_cert_path, "rb") as f:
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wwdr_cert = x509.load_pem_x509_certificate(f.read())
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with open(config.apple_signer_cert_path, "rb") as f:
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signer_cert = x509.load_pem_x509_certificate(f.read())
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with open(config.apple_signer_key_path, "rb") as f:
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signer_key = serialization.load_pem_private_key(f.read(), password=None)
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# Create PKCS#7 signature
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signature = (
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pkcs7.PKCS7SignatureBuilder()
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.set_data(manifest_data)
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.add_signer(signer_cert, signer_key, hashes.SHA256())
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.add_certificate(wwdr_cert)
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.sign(serialization.Encoding.DER, [pkcs7.PKCS7Options.DetachedSignature])
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)
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return signature
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except FileNotFoundError as e:
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raise WalletIntegrationException("apple", f"Certificate file not found: {e}")
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except Exception as e:
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raise WalletIntegrationException("apple", f"Failed to sign manifest: {e}")
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# =========================================================================
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# Pass URLs
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# =========================================================================
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def get_pass_url(self, card: LoyaltyCard) -> str:
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"""Get the URL to download the .pkpass file."""
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from app.core.config import settings
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base_url = getattr(settings, "BASE_URL", "https://api.example.com")
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return f"{base_url}/api/v1/loyalty/passes/apple/{card.apple_serial_number}.pkpass"
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# =========================================================================
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# Device Registration (Apple Web Service)
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# =========================================================================
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def register_device(
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self,
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db: Session,
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card: LoyaltyCard,
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device_library_id: str,
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push_token: str,
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) -> None:
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"""
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Register a device for push notifications.
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Called by Apple when user adds pass to their wallet.
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"""
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# Check if already registered
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existing = (
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db.query(AppleDeviceRegistration)
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.filter(
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AppleDeviceRegistration.card_id == card.id,
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AppleDeviceRegistration.device_library_identifier == device_library_id,
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)
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.first()
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)
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if existing:
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# Update push token
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existing.push_token = push_token
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else:
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# Create new registration
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registration = AppleDeviceRegistration(
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card_id=card.id,
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device_library_identifier=device_library_id,
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push_token=push_token,
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)
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db.add(registration)
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db.commit()
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logger.info(f"Registered device {device_library_id[:8]}... for card {card.id}")
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def unregister_device(
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self,
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db: Session,
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card: LoyaltyCard,
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device_library_id: str,
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) -> None:
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"""
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Unregister a device.
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Called by Apple when user removes pass from their wallet.
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"""
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db.query(AppleDeviceRegistration).filter(
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AppleDeviceRegistration.card_id == card.id,
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AppleDeviceRegistration.device_library_identifier == device_library_id,
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).delete()
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db.commit()
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logger.info(f"Unregistered device {device_library_id[:8]}... for card {card.id}")
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def send_push_updates(self, db: Session, card: LoyaltyCard) -> None:
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"""
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Send push notifications to all registered devices for a card.
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This tells Apple Wallet to fetch the updated pass.
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"""
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registrations = (
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db.query(AppleDeviceRegistration)
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.filter(AppleDeviceRegistration.card_id == card.id)
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.all()
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)
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if not registrations:
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return
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# Send push notification to each device
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for registration in registrations:
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try:
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self._send_push(registration.push_token)
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except Exception as e:
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logger.warning(
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f"Failed to send push to device {registration.device_library_identifier[:8]}...: {e}"
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)
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def _send_push(self, push_token: str) -> None:
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"""
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Send an empty push notification to trigger pass update.
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Apple Wallet will then call our web service to fetch the updated pass.
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"""
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# This would use APNs to send the push notification
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# For now, we'll log and skip the actual push
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logger.debug(f"Would send push to token {push_token[:8]}...")
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# In production, you would use something like:
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# from apns2.client import APNsClient
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# from apns2.payload import Payload
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# client = APNsClient(config.apple_signer_cert_path, use_sandbox=True)
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# payload = Payload()
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# client.send_notification(push_token, payload, "pass.com.example.loyalty")
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# Singleton instance
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apple_wallet_service = AppleWalletService()
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