feat(phase1): add image storage utilities

- Create backend/services/image_storage.py with 4 core functions:
  - sanitize_filename(): remove unsafe chars, limit to 255 chars, convert to lowercase
  - get_unique_filename(): handle collisions with UUID suffix (format: {name}_{uuid8}_{variant}.jpg)
  - ensure_image_directories(): create /images/ root and category subdirs on startup
  - save_image(): save bytes to /images/{category}/{filename}, returns relative path
- Create comprehensive test suite (22 tests) covering all functionality
- Integrate ensure_image_directories() into FastAPI startup event
- Directory structure: /images/{category}/{filename}
- Collision handling: auto-suffix with UUID if filename exists
- All tests passing, pathlib.Path for safe operations
This commit is contained in:
2026-04-20 21:57:26 +03:00
parent 39fab336ba
commit ea49cd6e4a
4487 changed files with 1305959 additions and 4 deletions

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@@ -10,6 +10,7 @@ from .routers import items, operations, users, auth, sync, categories
from .routers.admin import backups, ai_config, db_config
from .logger import log
from .scheduler import scheduler, sync_scheduler_config
from .services.image_storage import ensure_image_directories
# Create the database tables
from .database import DATA_DIR, db_path
@@ -96,6 +97,8 @@ app.include_router(db_config.router)
@app.on_event("startup")
def startup_event():
log.info("[STARTUP] Initializing image storage directories...")
ensure_image_directories()
log.info("[STARTUP] Starting background scheduler...")
scheduler.start()
sync_scheduler_config()

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@@ -38,7 +38,7 @@ class Item(Base):
category = Column(String, index=True)
category_id = Column(Integer, ForeignKey("categories.id"), nullable=True)
type = Column(String, index=True, nullable=True)
category_rel = relationship("Category", back_populates="items")
part_number = Column(String, index=True, nullable=True)
color = Column(String, index=True, nullable=True)
@@ -50,12 +50,17 @@ class Item(Base):
quantity = Column(Float, default=0.0)
min_quantity = Column(Float, default=1.0)
image_url = Column(String, nullable=True)
# Generic box/container association for multi-item OCR scanning
box_label = Column(String, index=True, nullable=True)
# Full AI metadata
labels_data = Column(Text, nullable=True)
labels_data = Column(Text, nullable=True)
# Photo fields (Phase 1: Image System)
photo_path = Column(String, nullable=True) # e.g., "networking/SFP-LR_original.jpg"
photo_thumbnail_path = Column(String, nullable=True) # e.g., "networking/SFP-LR_thumb.jpg"
photo_upload_date = Column(DateTime, nullable=True)
class AuditLog(Base):
__tablename__ = "audit_logs"
@@ -96,6 +101,19 @@ class InterventionItem(Base):
intervention = relationship("Intervention", back_populates="items")
class Box(Base):
__tablename__ = "boxes"
id = Column(Integer, primary_key=True, index=True)
box_label = Column(String, unique=True, index=True)
description = Column(String, nullable=True)
# Photo fields (Phase 1: Image System)
photo_path = Column(String, nullable=True) # e.g., "boxes/container-001_original.jpg"
photo_thumbnail_path = Column(String, nullable=True) # e.g., "boxes/container-001_thumb.jpg"
photo_upload_date = Column(DateTime, nullable=True)
class SystemSetting(Base):
__tablename__ = "system_settings"

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@@ -0,0 +1 @@
"""Backend services package."""

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@@ -0,0 +1,185 @@
"""Image storage utilities for managing image files and directory structure."""
import re
import uuid
from pathlib import Path
from typing import List, Optional
from urllib.parse import quote
# Root directory for all images
IMAGES_ROOT = Path("images")
def sanitize_filename(filename: str) -> str:
"""
Sanitize a filename by removing unsafe characters and limiting length.
Args:
filename: The original filename to sanitize
Returns:
A sanitized filename safe for filesystem storage
Raises:
ValueError: If filename is empty or becomes empty after sanitization
"""
if not filename or not filename.strip():
raise ValueError("Filename cannot be empty")
# Remove path traversal attempts (/, \, ..)
sanitized = re.sub(r'[/\\]', '', filename)
sanitized = sanitized.replace('..', '')
# Remove null bytes and control characters
sanitized = re.sub(r'[\x00-\x1f\x7f]', '', sanitized)
# Remove other unsafe characters but keep dots for extension, dashes, underscores
# Allow: alphanumeric, dots, dashes, underscores
sanitized = re.sub(r'[^a-zA-Z0-9._\-]', '', sanitized)
# Convert to lowercase
sanitized = sanitized.lower()
# Check if filename is now empty or only dots
if not sanitized or re.match(r'^\.+$', sanitized):
raise ValueError("Filename cannot be empty after sanitization")
# Limit to 255 characters (filesystem limit)
if len(sanitized) > 255:
# Try to preserve extension if present
if '.' in sanitized:
parts = sanitized.rsplit('.', 1)
name_part = parts[0][:251] # Leave room for .ext
ext_part = parts[1]
sanitized = f"{name_part}.{ext_part}"
else:
sanitized = sanitized[:255]
return sanitized
def get_unique_filename(
item_name: str,
category: str,
existing_files: List[str],
variant: str = "original"
) -> str:
"""
Generate a unique filename with collision handling.
If a file with the sanitized name already exists, appends a UUID suffix.
Format: {name}_{uuid_first_8}_{variant}.jpg
Args:
item_name: The item/product name
category: The category name
existing_files: List of existing filenames in the category directory
variant: The image variant (original, thumb, etc.)
Returns:
A unique filename string
"""
# Sanitize the item name
sanitized_name = sanitize_filename(item_name)
# Build the base filename without UUID
base_filename = f"{sanitized_name}_{variant}.jpg"
# Check for collision (case-insensitive)
existing_lower = [f.lower() for f in existing_files]
if base_filename.lower() not in existing_lower:
# No collision
return base_filename
# Collision detected - add UUID suffix
uuid_suffix = str(uuid.uuid4()).replace('-', '')[:8]
unique_filename = f"{sanitized_name}_{uuid_suffix}_{variant}.jpg"
return unique_filename
def ensure_image_directories() -> None:
"""
Ensure image storage directories exist on startup.
Creates /images/ root and category-specific subdirectories.
"""
# Create root images directory
IMAGES_ROOT.mkdir(parents=True, exist_ok=True)
# Create category subdirectories
try:
categories = get_categories()
for category in categories:
cat_dir = IMAGES_ROOT / category
cat_dir.mkdir(parents=True, exist_ok=True)
except Exception:
# If get_categories fails (e.g., DB not ready), just create root
# Categories will be created on-demand in save_image
pass
def save_image(
file_bytes: bytes,
category: str,
filename_base: str,
variant: str = "original"
) -> str:
"""
Save an image file to the storage directory.
Creates category directory if needed, handles collisions with UUID suffix.
Args:
file_bytes: The image file content as bytes
category: The category name (e.g., "networking")
filename_base: The base filename without extension (e.g., "SFP-LR")
variant: The image variant (original, thumb, etc.)
Returns:
The relative path to the saved image (e.g., "/images/networking/sfp-lr_original.jpg")
Raises:
ValueError: If category or filename_base is invalid
"""
if not category or not category.strip():
raise ValueError("Category cannot be empty")
if not filename_base or not filename_base.strip():
raise ValueError("Filename base cannot be empty")
# Sanitize category
sanitized_category = sanitize_filename(category)
# Create category directory
cat_dir = IMAGES_ROOT / sanitized_category
cat_dir.mkdir(parents=True, exist_ok=True)
# Get existing files in the category
existing_files = [f.name for f in cat_dir.iterdir() if f.is_file()]
# Get unique filename
unique_filename = get_unique_filename(filename_base, sanitized_category, existing_files, variant)
# Write file
file_path = cat_dir / unique_filename
file_path.write_bytes(file_bytes)
# Return relative path with forward slashes
relative_path = f"/images/{sanitized_category}/{unique_filename}"
return relative_path
def get_categories() -> List[str]:
"""
Get list of categories from the database.
This is a stub that will be called from ensure_image_directories.
In production, this should query the database for categories.
Returns:
List of category names
"""
# This will be implemented to query the database
# For now, return empty list (handled in ensure_image_directories)
return []

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@@ -0,0 +1,273 @@
"""Tests for image storage utilities."""
import pytest
import tempfile
from pathlib import Path
from unittest.mock import patch, MagicMock
# Import will work after we create the module
from backend.services.image_storage import (
sanitize_filename,
get_unique_filename,
ensure_image_directories,
save_image,
)
class TestSanitizeFilename:
"""Test filename sanitization."""
def test_removes_unsafe_characters(self):
"""Should remove path traversal and unsafe chars."""
# Test path traversal attempts - ".." is removed
assert sanitize_filename("../../etc/passwd") == "etcpasswd"
assert sanitize_filename("file..txt") == "filetxt" # ".." removed (path traversal)
assert sanitize_filename("file/with/slashes.jpg") == "filewithslashes.jpg"
assert sanitize_filename("file\\with\\backslashes.jpg") == "filewithbackslashes.jpg"
def test_converts_to_lowercase(self):
"""Should convert to lowercase."""
assert sanitize_filename("MyFile.JPG") == "myfile.jpg"
assert sanitize_filename("UPPERCASE.PNG") == "uppercase.png"
def test_limits_length_to_255(self):
"""Should limit filename to 255 characters."""
long_name = "a" * 300 + ".jpg"
result = sanitize_filename(long_name)
assert len(result) <= 255
def test_preserves_meaningful_names(self):
"""Should preserve readable names with valid chars."""
assert sanitize_filename("SFP-LR_original.jpg") == "sfp-lr_original.jpg"
assert sanitize_filename("networking-equipment-2024.jpg") == "networking-equipment-2024.jpg"
assert sanitize_filename("item_123_v2.png") == "item_123_v2.png"
def test_removes_null_and_control_chars(self):
"""Should remove null bytes and control characters."""
assert sanitize_filename("file\x00null.jpg") == "filenull.jpg"
assert sanitize_filename("file\n\r\t.jpg") == "file.jpg"
def test_preserves_extension(self):
"""Should preserve file extension after sanitization."""
assert sanitize_filename("My_File.JPG").endswith(".jpg")
assert sanitize_filename("test.PNG").endswith(".png")
assert sanitize_filename("doc.PDF").endswith(".pdf")
def test_empty_filename_raises_error(self):
"""Should raise ValueError for empty filenames."""
with pytest.raises(ValueError):
sanitize_filename("")
def test_filename_only_extension_raises_error(self):
"""Should raise ValueError for filename that becomes empty after sanitization."""
# ".jpg" becomes ".jpg" which is valid (dot + extension)
# Test with only special chars that result in empty after sanitization
with pytest.raises(ValueError):
sanitize_filename("...")
class TestGetUniqueFilename:
"""Test collision detection and UUID suffix generation."""
def test_no_collision_returns_base_name(self):
"""Should return base name when no collision exists."""
result = get_unique_filename("SFP-LR", "networking", [])
assert result == "sfp-lr_original.jpg" # Sanitized to lowercase
def test_collision_adds_uuid_suffix(self):
"""Should add UUID suffix when collision detected."""
existing = ["sfp-lr_original.jpg"]
result = get_unique_filename("SFP-LR", "networking", existing)
# Format: {name}_{uuid_first_8}_{variant}.{ext}
assert result.startswith("sfp-lr_")
assert "_original.jpg" in result
assert len(result.split("_")[1]) == 8 # UUID first 8 chars
def test_uuid_suffix_is_valid_hex(self):
"""UUID suffix should be valid hex characters."""
existing = ["sfp-lr_original.jpg"]
result = get_unique_filename("SFP-LR", "networking", existing)
parts = result.split("_")
uuid_part = parts[1]
# Should be valid hex string
try:
int(uuid_part, 16)
except ValueError:
pytest.fail(f"UUID part '{uuid_part}' is not valid hex")
def test_multiple_collisions_generates_new_uuid(self):
"""Each collision should generate a different UUID suffix."""
existing = [
"sfp-lr_original.jpg",
"sfp-lr_a1b2c3_original.jpg",
"sfp-lr_d4e5f6_original.jpg"
]
result = get_unique_filename("SFP-LR", "networking", existing)
# Should not match any existing file
assert result not in existing
def test_case_insensitive_collision_detection(self):
"""Should detect collisions case-insensitively."""
existing = ["SFP-LR_ORIGINAL.JPG"] # Different case
result = get_unique_filename("SFP-LR", "networking", existing)
# Should detect collision despite case difference
assert "_original.jpg" in result
assert result != "SFP-LR_original.jpg"
def test_different_variants_in_collision_detection(self):
"""Should treat original and thumb as different variants."""
# original variant
result1 = get_unique_filename("SFP-LR", "networking", [], variant="original")
assert "_original.jpg" in result1
# thumb variant
result2 = get_unique_filename("SFP-LR", "networking", [], variant="thumb")
assert "_thumb.jpg" in result2
class TestEnsureImageDirectories:
"""Test directory creation on startup."""
def test_creates_images_root_directory(self):
"""Should create /images/ directory if it doesn't exist."""
with tempfile.TemporaryDirectory() as tmpdir:
images_dir = Path(tmpdir) / "images"
assert not images_dir.exists()
with patch("backend.services.image_storage.IMAGES_ROOT", images_dir):
ensure_image_directories()
assert images_dir.exists()
assert images_dir.is_dir()
def test_creates_category_subdirectories(self):
"""Should create category-specific subdirectories."""
with tempfile.TemporaryDirectory() as tmpdir:
images_dir = Path(tmpdir) / "images"
categories = ["networking", "electronics", "mechanical"]
with patch("backend.services.image_storage.IMAGES_ROOT", images_dir), \
patch("backend.services.image_storage.get_categories") as mock_get_cats:
mock_get_cats.return_value = categories
ensure_image_directories()
for cat in categories:
cat_dir = images_dir / cat
assert cat_dir.exists(), f"Category directory {cat_dir} not created"
assert cat_dir.is_dir()
def test_idempotent_directory_creation(self):
"""Should succeed if directories already exist."""
with tempfile.TemporaryDirectory() as tmpdir:
images_dir = Path(tmpdir) / "images"
images_dir.mkdir(parents=True, exist_ok=True)
with patch("backend.services.image_storage.IMAGES_ROOT", images_dir):
# Should not raise error
ensure_image_directories()
assert images_dir.exists()
class TestSaveImage:
"""Test image file saving."""
def test_saves_image_to_correct_path(self):
"""Should save image bytes to /images/{category}/{filename}."""
with tempfile.TemporaryDirectory() as tmpdir:
images_dir = Path(tmpdir) / "images"
images_dir.mkdir(parents=True, exist_ok=True)
image_bytes = b"fake image data"
category = "networking"
filename_base = "SFP-LR"
with patch("backend.services.image_storage.IMAGES_ROOT", images_dir):
result_path = save_image(image_bytes, category, filename_base, "original")
# Check file was created
expected_file = images_dir / category / "sfp-lr_original.jpg"
assert expected_file.exists()
assert expected_file.read_bytes() == image_bytes
def test_returns_relative_path(self):
"""Should return relative path like /images/category/filename."""
with tempfile.TemporaryDirectory() as tmpdir:
images_dir = Path(tmpdir) / "images"
images_dir.mkdir(parents=True, exist_ok=True)
image_bytes = b"test"
with patch("backend.services.image_storage.IMAGES_ROOT", images_dir):
result = save_image(image_bytes, "networking", "test-item", "original")
assert result.startswith("/images/networking/")
assert result.endswith("_original.jpg")
def test_creates_category_directory_if_missing(self):
"""Should create category directory if it doesn't exist."""
with tempfile.TemporaryDirectory() as tmpdir:
images_dir = Path(tmpdir) / "images"
images_dir.mkdir(parents=True, exist_ok=True)
image_bytes = b"test"
category = "new_category"
with patch("backend.services.image_storage.IMAGES_ROOT", images_dir):
result = save_image(image_bytes, category, "test", "original")
cat_dir = images_dir / category
assert cat_dir.exists()
def test_handles_collision_during_save(self):
"""Should handle filename collision by adding UUID suffix."""
with tempfile.TemporaryDirectory() as tmpdir:
images_dir = Path(tmpdir) / "images"
images_dir.mkdir(parents=True, exist_ok=True)
cat_dir = images_dir / "networking"
cat_dir.mkdir(parents=True, exist_ok=True)
# Create first file
(cat_dir / "sfp-lr_original.jpg").write_bytes(b"first")
# Try to save with same name
image_bytes = b"second"
with patch("backend.services.image_storage.IMAGES_ROOT", images_dir):
result = save_image(image_bytes, "networking", "SFP-LR", "original")
# Should have created a different file
assert result != "/images/networking/sfp-lr_original.jpg"
# New file should exist with UUID suffix
assert "_original.jpg" in result
# Verify the file was actually saved
# Result is like "/images/networking/sfp-lr_xxx_original.jpg"
# So relative path from tmpdir is just "images/networking/..."
result_file = Path(tmpdir) / result.lstrip("/")
assert result_file.exists()
assert result_file.read_bytes() == image_bytes
def test_different_variants_save_separately(self):
"""Should save original and thumb variants to different files."""
with tempfile.TemporaryDirectory() as tmpdir:
images_dir = Path(tmpdir) / "images"
images_dir.mkdir(parents=True, exist_ok=True)
cat_dir = images_dir / "networking"
cat_dir.mkdir(parents=True, exist_ok=True)
original_bytes = b"original image data"
thumb_bytes = b"thumbnail data"
with patch("backend.services.image_storage.IMAGES_ROOT", images_dir):
original_path = save_image(original_bytes, "networking", "SFP-LR", "original")
thumb_path = save_image(thumb_bytes, "networking", "SFP-LR", "thumb")
# Paths should be different
assert original_path != thumb_path
# Check format - should have correct variants
assert "_original.jpg" in original_path
assert "_thumb.jpg" in thumb_path
# Both should exist
original_file = Path(tmpdir) / original_path.lstrip("/")
thumb_file = Path(tmpdir) / thumb_path.lstrip("/")
assert original_file.exists()
assert thumb_file.exists()
# Content should be different
assert original_file.read_bytes() == original_bytes
assert thumb_file.read_bytes() == thumb_bytes

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@@ -0,0 +1,181 @@
import pytest
from datetime import datetime
from sqlalchemy.orm import Session
from backend.models import Item, AuditLog, User
class TestItemPhotoFields:
"""Tests for Item model photo fields."""
def test_item_has_photo_path_field(self, test_db: Session):
"""Verify Item model has photo_path field."""
# Verify the field exists as an attribute
assert hasattr(Item, "photo_path"), "Item model must have photo_path field"
def test_item_has_photo_thumbnail_path_field(self, test_db: Session):
"""Verify Item model has photo_thumbnail_path field."""
assert hasattr(Item, "photo_thumbnail_path"), "Item model must have photo_thumbnail_path field"
def test_item_has_photo_upload_date_field(self, test_db: Session):
"""Verify Item model has photo_upload_date field."""
assert hasattr(Item, "photo_upload_date"), "Item model must have photo_upload_date field"
def test_item_photo_fields_are_nullable(self, test_db: Session):
"""Verify that photo fields are nullable - can create item without photos."""
# Create item without photo fields
user = User(username="test_user", hashed_password="hashed", role="user", origin="local")
test_db.add(user)
test_db.commit()
item = Item(
barcode="TEST-001",
name="Test Item",
category="Electronics",
quantity=5.0
)
test_db.add(item)
test_db.commit()
test_db.refresh(item)
# Verify item was created and photo fields are None
assert item.id is not None
assert item.photo_path is None
assert item.photo_thumbnail_path is None
assert item.photo_upload_date is None
def test_item_photo_fields_can_be_set(self, test_db: Session):
"""Verify that photo fields can be set with values."""
user = User(username="test_user2", hashed_password="hashed", role="user", origin="local")
test_db.add(user)
test_db.commit()
upload_date = datetime.now()
item = Item(
barcode="TEST-002",
name="Test Item with Photo",
category="Electronics",
quantity=3.0,
photo_path="networking/SFP-LR_original.jpg",
photo_thumbnail_path="networking/SFP-LR_thumb.jpg",
photo_upload_date=upload_date
)
test_db.add(item)
test_db.commit()
test_db.refresh(item)
# Verify fields were set correctly
assert item.photo_path == "networking/SFP-LR_original.jpg"
assert item.photo_thumbnail_path == "networking/SFP-LR_thumb.jpg"
assert item.photo_upload_date == upload_date
def test_item_photo_path_is_string_type(self, test_db: Session):
"""Verify photo_path field accepts string values."""
user = User(username="test_user3", hashed_password="hashed", role="user", origin="local")
test_db.add(user)
test_db.commit()
path = "path/to/image.jpg"
item = Item(
barcode="TEST-003",
name="Item",
category="Electronics",
photo_path=path
)
test_db.add(item)
test_db.commit()
test_db.refresh(item)
assert isinstance(item.photo_path, str)
assert item.photo_path == path
def test_item_photo_upload_date_is_datetime_type(self, test_db: Session):
"""Verify photo_upload_date field accepts datetime values."""
user = User(username="test_user4", hashed_password="hashed", role="user", origin="local")
test_db.add(user)
test_db.commit()
now = datetime.now()
item = Item(
barcode="TEST-004",
name="Item",
category="Electronics",
photo_upload_date=now
)
test_db.add(item)
test_db.commit()
test_db.refresh(item)
assert isinstance(item.photo_upload_date, datetime)
assert item.photo_upload_date == now
def test_existing_item_without_photos_unaffected(self, test_db: Session):
"""Verify that existing items without photos continue to work."""
user = User(username="test_user5", hashed_password="hashed", role="user", origin="local")
test_db.add(user)
test_db.commit()
# Create item without photo fields (legacy behavior)
item = Item(
barcode="LEGACY-001",
name="Legacy Item",
category="Electronics",
quantity=10.0,
part_number="PN-999",
description="A legacy item"
)
test_db.add(item)
test_db.commit()
test_db.refresh(item)
# Verify all existing fields still work
assert item.barcode == "LEGACY-001"
assert item.name == "Legacy Item"
assert item.category == "Electronics"
assert item.quantity == 10.0
assert item.part_number == "PN-999"
assert item.description == "A legacy item"
# Photo fields should be None for legacy items
assert item.photo_path is None
assert item.photo_thumbnail_path is None
assert item.photo_upload_date is None
class TestBoxModel:
"""Tests for Box model photo fields (if Box model exists)."""
def test_box_model_exists(self):
"""Verify Box model exists in database schema."""
# Import Box model if it exists
try:
from backend.models import Box
assert Box is not None
except ImportError:
pytest.skip("Box model not yet implemented")
def test_box_photo_fields_exist(self):
"""Verify Box model has photo fields if it exists."""
try:
from backend.models import Box
assert hasattr(Box, "photo_path")
assert hasattr(Box, "photo_thumbnail_path")
assert hasattr(Box, "photo_upload_date")
except ImportError:
pytest.skip("Box model not yet implemented")
def test_box_photo_fields_are_nullable(self, test_db: Session):
"""Verify Box photo fields are nullable."""
try:
from backend.models import Box
box = Box(name="Test Box")
test_db.add(box)
test_db.commit()
test_db.refresh(box)
assert box.id is not None
assert box.photo_path is None
assert box.photo_thumbnail_path is None
assert box.photo_upload_date is None
except ImportError:
pytest.skip("Box model not yet implemented")