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from io import StringIO
import csv
from fastapi import APIRouter, HTTPException, status, Query
from fastapi.responses import StreamingResponse
from sqlalchemy import or_, cast, String
from backend.core.dependencies import DbSession, AdminUser
from backend.schemas.admin import (
AuditLogResponse, SystemStatsResponse, SiteCreate, SiteUpdate
)
from backend.schemas.site import SiteResponse
from backend.models import (
User, Group, Site, Crop, AuditLog, SensorData,
EquipmentGroup, Parameter
)
router = APIRouter()
@router.get("/stats", response_model=SystemStatsResponse)
def get_system_stats(db: DbSession, admin: AdminUser):
return SystemStatsResponse(
total_users=db.query(User).count(),
active_users=db.query(User).filter(User.is_active == True).count(),
total_groups=db.query(Group).count(),
total_sites=db.query(Site).count(),
active_sites=db.query(Site).filter(Site.is_active == True).count(),
total_sensor_records=db.query(SensorData).count(),
total_parameters=db.query(Parameter).count(),
total_equipment_groups=db.query(EquipmentGroup).count()
)
@router.get("/audit", response_model=list[AuditLogResponse])
def get_audit_logs(
db: DbSession,
admin: AdminUser,
limit: int = Query(default=100, le=1000),
offset: int = Query(default=0),
user_id: str | None = None,
action: str | None = None,
search: str | None = Query(default=None, description="Search in user email, IP address, resource type/id, and details"),
start_date: datetime | None = Query(default=None, description="Filter logs from this date (ISO format)"),
end_date: datetime | None = Query(default=None, description="Filter logs until this date (ISO format)")
):
"""Get audit logs with optional filtering and search."""
query = db.query(AuditLog).order_by(AuditLog.created_at.desc())
if user_id:
query = query.filter(AuditLog.user_id == user_id)
if action:
query = query.filter(AuditLog.action == action)
if start_date:
query = query.filter(AuditLog.created_at >= start_date)
if end_date:
query = query.filter(AuditLog.created_at <= end_date)
# Get all user emails for search matching
all_users = db.query(User).all()
user_map = {u.id: u.email for u in all_users}
email_to_id = {u.email.lower(): u.id for u in all_users}
# Apply search filter
if search:
search_lower = search.lower()
# First check if search matches a user email
matching_user_ids = [uid for email, uid in email_to_id.items() if search_lower in email]
# Build OR conditions for search
search_conditions = [
AuditLog.ip_address.ilike(f"%{search}%"),
AuditLog.resource_type.ilike(f"%{search}%"),
AuditLog.resource_id.ilike(f"%{search}%"),
AuditLog.action.ilike(f"%{search}%"),
cast(AuditLog.details, String).ilike(f"%{search}%"),
]
# Add user_id matches if any emails matched
if matching_user_ids:
search_conditions.append(AuditLog.user_id.in_(matching_user_ids))
query = query.filter(or_(*search_conditions))
logs = query.offset(offset).limit(limit).all()
return [
AuditLogResponse(
id=log.id,
user_id=log.user_id,
user_email=user_map.get(log.user_id) if log.user_id else None,
action=log.action,
resource_type=log.resource_type,
resource_id=log.resource_id,
details=log.details,
ip_address=log.ip_address,
created_at=log.created_at
)
for log in logs
]
@router.get("/audit/export")
def export_audit_logs(
db: DbSession,
admin: AdminUser,
user_id: str | None = None,
action: str | None = None,
search: str | None = None,
start_date: datetime | None = None,
end_date: datetime | None = None
):
"""Export audit logs as CSV file."""
query = db.query(AuditLog).order_by(AuditLog.created_at.desc())
if user_id:
query = query.filter(AuditLog.user_id == user_id)
if action:
query = query.filter(AuditLog.action == action)
if start_date:
query = query.filter(AuditLog.created_at >= start_date)
if end_date:
query = query.filter(AuditLog.created_at <= end_date)
# Get all user emails for mapping
all_users = db.query(User).all()
user_map = {u.id: u.email for u in all_users}
email_to_id = {u.email.lower(): u.id for u in all_users}
# Apply search filter
if search:
search_lower = search.lower()
matching_user_ids = [uid for email, uid in email_to_id.items() if search_lower in email]
search_conditions = [
AuditLog.ip_address.ilike(f"%{search}%"),
AuditLog.resource_type.ilike(f"%{search}%"),
AuditLog.resource_id.ilike(f"%{search}%"),
AuditLog.action.ilike(f"%{search}%"),
cast(AuditLog.details, String).ilike(f"%{search}%"),
]
if matching_user_ids:
search_conditions.append(AuditLog.user_id.in_(matching_user_ids))
query = query.filter(or_(*search_conditions))
logs = query.all()
# Create CSV in memory
output = StringIO()
writer = csv.writer(output)
# Write header
writer.writerow([
"ID", "Timestamp (UTC)", "User Email", "Action", "Resource Type",
"Resource ID", "IP Address", "Details"
])
# Write data rows
for log in logs:
writer.writerow([
log.id,
log.created_at.isoformat() if log.created_at else "",
user_map.get(log.user_id, "") if log.user_id else "",
log.action,
log.resource_type or "",
log.resource_id or "",
log.ip_address or "",
str(log.details) if log.details else ""
])
output.seek(0)
# Generate filename with timestamp
timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
filename = f"audit_log_export_{timestamp}.csv"
return StreamingResponse(
iter([output.getvalue()]),
media_type="text/csv",
headers={"Content-Disposition": f"attachment; filename={filename}"}
)
@router.get("/sites", response_model=list[SiteResponse])
def list_all_sites(db: DbSession, admin: AdminUser):
"""List all sites (including inactive) for admin management."""
sites = db.query(Site).all()
return [
SiteResponse(
id=s.id,
site_code=s.site_code,
name=s.name,
crop_id=s.crop_id,
crop_name=s.crop.display_name if s.crop else None,
latitude=s.latitude,
longitude=s.longitude,
is_active=s.is_active
)
for s in sites
]
@router.post("/sites", response_model=SiteResponse, status_code=status.HTTP_201_CREATED)
def create_site(site_data: SiteCreate, db: DbSession, admin: AdminUser):
existing = db.query(Site).filter(Site.site_code == site_data.site_code).first()
if existing:
raise HTTPException(
status_code=status.HTTP_400_BAD_REQUEST,
detail="Site with this code already exists"
)
crop = db.query(Crop).filter(Crop.id == site_data.crop_id).first()
if not crop:
raise HTTPException(
status_code=status.HTTP_400_BAD_REQUEST,
detail="Invalid crop_id"
)
site = Site(
site_code=site_data.site_code,
name=site_data.name,
crop_id=site_data.crop_id,
latitude=site_data.latitude,
longitude=site_data.longitude
)
db.add(site)
db.commit()
db.refresh(site)
# Log the action
log = AuditLog(
user_id=admin.id,
action="site_created",
resource_type="site",
resource_id=site.id,
details={"site_code": site.site_code, "name": site.name}
)
db.add(log)
db.commit()
return SiteResponse(
id=site.id,
site_code=site.site_code,
name=site.name,
crop_id=site.crop_id,
crop_name=crop.display_name,
latitude=site.latitude,
longitude=site.longitude,
is_active=site.is_active
)
@router.put("/sites/{site_id}", response_model=SiteResponse)
def update_site(site_id: str, site_data: SiteUpdate, db: DbSession, admin: AdminUser):
site = db.query(Site).filter(Site.id == site_id).first()
if not site:
raise HTTPException(
status_code=status.HTTP_404_NOT_FOUND,
detail="Site not found"
)
if site_data.site_code is not None:
existing = db.query(Site).filter(Site.site_code == site_data.site_code, Site.id != site_id).first()
if existing:
raise HTTPException(
status_code=status.HTTP_400_BAD_REQUEST,
detail="Site with this code already exists"
)
site.site_code = site_data.site_code
if site_data.name is not None:
site.name = site_data.name
if site_data.crop_id is not None:
crop = db.query(Crop).filter(Crop.id == site_data.crop_id).first()
if not crop:
raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid crop_id")
site.crop_id = site_data.crop_id
if site_data.latitude is not None:
site.latitude = site_data.latitude
if site_data.longitude is not None:
site.longitude = site_data.longitude
if site_data.is_active is not None:
site.is_active = site_data.is_active
db.commit()
db.refresh(site)
# Log the action
log = AuditLog(
user_id=admin.id,
action="site_updated",
resource_type="site",
resource_id=site.id,
details={"site_code": site.site_code}
)
db.add(log)
db.commit()
return SiteResponse(
id=site.id,
site_code=site.site_code,
name=site.name,
crop_id=site.crop_id,
crop_name=site.crop.display_name if site.crop else None,
latitude=site.latitude,
longitude=site.longitude,
is_active=site.is_active
)
@router.delete("/sites/{site_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_site(site_id: str, db: DbSession, admin: AdminUser):
site = db.query(Site).filter(Site.id == site_id).first()
if not site:
raise HTTPException(
status_code=status.HTTP_404_NOT_FOUND,
detail="Site not found"
)
# Log before deletion
log = AuditLog(
user_id=admin.id,
action="site_deleted",
resource_type="site",
resource_id=site.id,
details={"site_code": site.site_code, "name": site.name}
)
db.add(log)
db.delete(site)
db.commit()
@router.get("/crops", response_model=list[dict])
def list_crops_admin(db: DbSession, admin: AdminUser):
"""List all crops with site counts for admin."""
crops = db.query(Crop).all()
return [
{
"id": c.id,
"name": c.name,
"display_name": c.display_name,
"color": c.color,
"site_count": db.query(Site).filter(Site.crop_id == c.id).count()
}
for c in crops
]
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