Add alembic

.gitignore

@@ -1,3 +1,2 @@
-**/__init__.py
 **/__pycache__
 simple-ocpp-cs.db

alembic.ini

@@ -0,0 +1,113 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = alembic
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# see https://alembic.sqlalchemy.org/en/latest/tutorial.html#editing-the-ini-file
+# for all available tokens
+file_template = %%(year)d%%(month).2d%%(day).2d_%%(rev)s-%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python>=3.9 or backports.zoneinfo library.
+# Any required deps can installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to ZoneInfo()
+# leave blank for localtime
+timezone = UTC
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to alembic/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "version_path_separator" below.
+# version_locations = %(here)s/bar:%(here)s/bat:alembic/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep.
+# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas.
+# Valid values for version_path_separator are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # Use os.pathsep. Default configuration used for new projects.
+
+# set to 'true' to search source files recursively
+# in each "version_locations" directory
+# new in Alembic version 1.10
+# recursive_version_locations = false
+
+# the output encoding used when revision files
+# are written from script.py.mako
+output_encoding = utf-8
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# lint with attempts to fix using "ruff" - use the exec runner, execute a binary
+# hooks = ruff
+# ruff.type = exec
+# ruff.executable = %(here)s/.venv/bin/ruff
+# ruff.options = --fix REVISION_SCRIPT_FILENAME
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

alembic/env.py

@@ -0,0 +1,59 @@
+from logging.config import fileConfig
+import os
+
+from sqlalchemy import create_engine
+from alembic import context
+
+# Import models for autogenerate support
+from app.database import Base
+from app.models import *
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    SQLALCHEMY_DATABASE_URL = os.getenv("CS_DATABASE_URL", "sqlite:///./simple-ocpp-cs.db")
+
+    if SQLALCHEMY_DATABASE_URL.startswith("sqlite"):
+        connectable = create_engine(
+            SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
+        )
+    else:
+        connectable = create_engine(SQLALCHEMY_DATABASE_URL)
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    raise NotImplementedError("Offline migration is not supported")
+else:
+    run_migrations_online()

alembic/script.py.mako

@@ -0,0 +1,26 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

app/database.py

@@ -14,4 +14,11 @@ else:
 
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
 
-Base = declarative_base()
+Base = declarative_base()
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

app/main.py

@@ -2,9 +2,11 @@ from fastapi import FastAPI
 from starlette.middleware.authentication import AuthenticationMiddleware
 import uvicorn
 
-from routers import chargepoint_v1, ocpp_v1
+from app.database import engine, Base
-from database import engine, Base
+from app.models import *
-from util.websocket_auth_backend import BasicAuthBackend
+
+from app.routers import chargepoint_v1, ocpp_v1
+from app.util.websocket_auth_backend import BasicAuthBackend
 
 Base.metadata.create_all(bind=engine)
 

app/models/__init__.py

@@ -0,0 +1,8 @@
+__all__ = [
+    "chargepoint",
+    "connector",
+    "id_token",
+    "meter_value",
+    "transaction",
+    "user"
+]

app/models/chargepoint.py

@@ -1,15 +1,16 @@
-from sqlalchemy import Boolean, Column, DateTime, String
+import uuid
+from sqlalchemy import Uuid, Boolean, Column, DateTime, String
 from sqlalchemy.orm import relationship
 
-from database import Base
+from app.database import Base
 
 class ChargePoint(Base):
     __tablename__ = "chargepoints"
 
-    id = Column(String, primary_key=True)
+    id = Column(Uuid, primary_key=True, default=uuid.uuid4)
     friendly_name = Column(String, unique=True, index=True)
     is_active = Column(Boolean, default=True)
     password = Column(String)
     last_seen = Column(DateTime, nullable=True)
 
-    connectors = relationship("Connector")
+    connectors = relationship("Connector", cascade="delete, delete-orphan")

app/models/connector.py

@@ -0,0 +1,15 @@
+import uuid
+from sqlalchemy import Uuid, Column, Enum, ForeignKey, Integer
+
+from app.schemas.connector import ConnectorStatus
+from app.database import Base
+
+class Connector(Base):
+    __tablename__ = "connectors"
+
+    id = Column(Uuid, primary_key=True, default=uuid.uuid4)
+    evse = Column(Integer)
+    index = Column(Integer)
+    status = Column(Enum(ConnectorStatus))
+
+    chargepoint_id = Column(Uuid, ForeignKey("chargepoints.id"))

app/models/id_token.py

@@ -0,0 +1,16 @@
+import uuid
+from sqlalchemy import Uuid, Boolean, Column, ForeignKey, String
+from sqlalchemy.orm import relationship
+
+from app.database import Base
+
+class IdToken(Base):
+    __tablename__ = "id_tokens"
+
+    id = Column(Uuid, primary_key=True, default=uuid.uuid4)
+    title = Column(String)
+    is_active = Column(Boolean, default=True)
+    token = Column(String, index=True)
+
+    owner_id = Column(Uuid, ForeignKey("users.id"))
+    owner = relationship("User", back_populates="id_tokens")

app/models/meter_value.py

@@ -0,0 +1,17 @@
+import uuid
+from sqlalchemy import Uuid, Column, DateTime, Enum, Float, ForeignKey, String
+
+from app.database import Base
+from app.schemas.meter_value import Measurand, PhaseType
+
+class Transaction(Base):
+    __tablename__ = "meter_values"
+
+    id = Column(Uuid, primary_key=True, default=uuid.uuid4)
+    timestamp = Column(DateTime, index=True)
+    measurand = Column(Enum(Measurand))
+    phase_type = Column(Enum(PhaseType))
+    unit = Column(String)
+    value = Column(Float)
+
+    transaction_id = Column(Uuid, ForeignKey("transactions.id"), index=True)

app/models/transaction.py

@@ -0,0 +1,20 @@
+import uuid
+from sqlalchemy import Uuid, Column, DateTime, Enum, Float, ForeignKey
+from sqlalchemy.orm import relationship, backref
+
+from app.schemas.transaction import TransactionEventTriggerReason, TransactionStatus
+from app.database import Base
+
+class Transaction(Base):
+    __tablename__ = "transactions"
+
+    id = Column(Uuid, primary_key=True, default=uuid.uuid4)
+    status = Column(Enum(TransactionStatus), index=True)
+    started_at = Column(DateTime, index=True)
+    ended_at = Column(DateTime, nullable=True, index=True)
+    meter_start = Column(Float)
+    meter_end = Column(Float, nullable=True)
+    end_reason = Column(Enum(TransactionEventTriggerReason))
+
+    connector_id = Column(Uuid, ForeignKey("connectors.id"), index=True)
+    id_token_id = Column(Uuid, ForeignKey("id_tokens.id"), index= True)

app/models/user.py

@@ -0,0 +1,14 @@
+import uuid
+from sqlalchemy import Uuid, Boolean, Column, String
+from sqlalchemy.orm import relationship
+
+from app.database import Base
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Uuid, primary_key=True, default=uuid.uuid4)
+    friendly_name = Column(String, unique=True, index=True)
+    is_active = Column(Boolean, default=True)
+    
+    id_tokens = relationship("IdToken", back_populates="owner", cascade="delete, delete-orphan")

app/ocpp_proto/chargepoint.py

@@ -0,0 +1,88 @@
+from datetime import datetime, UTC
+import os
+
+from ocpp.routing import on
+from ocpp.v201 import ChargePoint as cp
+from ocpp.v201 import call_result
+from ocpp.v201.enums import Action, RegistrationStatusType, AuthorizationStatusType
+
+from app.database import SessionLocal
+from app.models.chargepoint import ChargePoint
+from app.models.connector import Connector
+from app.models.id_token import IdToken
+from app.schemas.connector import ConnectorStatus
+
+class ChargePoint(cp):
+
+    @on(Action.BootNotification)
+    async def on_boot_notification(self, charging_station, reason, **kwargs):
+        with SessionLocal() as db:
+            db_chargepoint = db.query(ChargePoint).filter(ChargePoint.friendly_name == self.id).first()
+            db_chargepoint.last_seen = datetime.now(UTC)
+            db.commit()
+        return call_result.BootNotificationPayload(
+            current_time=datetime.now(UTC).isoformat(),
+            interval=int(os.getenv("CS_HEARTBEAT_INTERVAL", "1800")),
+            status=RegistrationStatusType.accepted
+        )
+    
+    @on(Action.Heartbeat)
+    async def on_heartbeat_request(self):
+        with SessionLocal() as db:
+            db_chargepoint = db.query(ChargePoint).filter(ChargePoint.friendly_name == self.id).first()
+            db_chargepoint.last_seen = datetime.now(UTC)
+            db.commit()
+        return call_result.HeartbeatPayload(
+            current_time=datetime.now(UTC).isoformat()
+        )
+    
+    @on(Action.StatusNotification)
+    async def on_status_notification(self, evse_id: int, connector_id: int, connector_status: str, **kwargs):
+        with SessionLocal() as db:
+            db_chargepoint = db.query(ChargePoint).filter(ChargePoint.friendly_name == self.id).first()
+            db_chargepoint.last_seen = datetime.now(UTC)
+
+            db_connector = db.query(Connector).filter(
+                Connector.chargepoint_id == db_chargepoint.id,
+                Connector.evse == evse_id,
+                Connector.index == connector_id
+            ).first()
+            if db_connector == None:
+                db_connector = Connector(
+                    chargepoint_id = db_chargepoint.id,
+                    evse = evse_id,
+                    index = connector_id,
+                    status = ConnectorStatus(connector_status)
+                )
+                db.add(db_connector)
+            else:
+                db_connector.status = ConnectorStatus(connector_status)
+
+            db.commit()
+
+        return call_result.StatusNotificationPayload()
+    
+    @on(Action.Authorize)
+    async def on_authorize(self, id_token, **kwargs):
+        if id_token == None:
+            return call_result.AuthorizePayload(id_token_info={'status': AuthorizationStatusType.invalid})
+        if id_token.type != "ISO14443" | "ISO15693":
+            return call_result.AuthorizePayload(id_token_info={'status': AuthorizationStatusType.invalid})
+        
+        with SessionLocal() as db:
+            db_chargepoint = db.query(ChargePoint).filter(ChargePoint.friendly_name == self.id).first()
+            db_chargepoint.last_seen = datetime.now(UTC)
+
+            db_id_token = db.query(IdToken).filter(IdToken.token == id_token.id).first()
+            db.commit()
+            
+        if db_id_token == None:
+            return call_result.AuthorizePayload(id_token_info={'status': AuthorizationStatusType.unknown})
+        if db_id_token.is_active == False:
+            return call_result.AuthorizePayload(id_token_info={'status': AuthorizationStatusType.blocked})
+            
+        return call_result.AuthorizePayload(id_token_info={'status': AuthorizationStatusType.accepted, 'groupIdToken': str(db_id_token.owner_id)})
+    
+    @on(Action.TransactionEvent)
+    async def on_transaction_event(self):
+        return call_result.TransactionEventPayload()

app/ocpp_proto/chargepoint_manager.py

@@ -1,22 +1,23 @@
 import logging
 from typing import Any, Coroutine, Dict
+from uuid import UUID
 
 from websockets import ConnectionClosed
 
-from ocpp_proto.chargepoint import ChargePoint
+from app.ocpp_proto.chargepoint import ChargePoint
 
-__active_connections: Dict[str, ChargePoint] = {}
+__active_connections: Dict[UUID, ChargePoint] = {}
 
-async def start(cp: ChargePoint):
+async def start(id: UUID, cp: ChargePoint):
     try:
-        __active_connections[cp.id] = cp
+        __active_connections[id] = cp
         await cp.start()
     except ConnectionClosed:
-        logging.info("Charging station '%s' disconnected", cp.id)
+        logging.info("Charging station '%s' (%s) disconnected", cp.id, id)
-        __active_connections.pop(cp.id, None)
+        __active_connections.pop(id, None)
 
 async def call(
-    chargepoint_id: str,
+    chargepoint_id: UUID,
     payload: Any,
     suppress: bool = True,
     unique_id: Any | None = None
@@ -27,5 +28,5 @@ async def call(
     except KeyError as e:
         raise e
     
-def is_connected(chargepoint_id: str):
+def is_connected(chargepoint_id: UUID):
     return chargepoint_id in __active_connections.keys()

app/routers/chargepoint_v1.py

@@ -0,0 +1,114 @@
+import random
+import string
+from uuid import UUID
+from fastapi import APIRouter, HTTPException, Security
+from fastapi.params import Depends
+from sqlalchemy.orm import Session
+
+from app.database import get_db
+from app.ocpp_proto import chargepoint_manager
+from app.schemas.chargepoint import ChargePoint, ChargePointCreate, ChargePointUpdate, ChargePointPassword, ChargePointConnectionInfo
+from app.models.chargepoint import ChargePoint as DBChargePoint
+from app.security import get_api_key
+
+router = APIRouter(
+    prefix="/chargepoint",
+    tags=["chargepoint"],
+)
+
+@router.get(path="/", response_model=list[ChargePoint])
+async def get_chargepoints(
+    skip: int = 0,
+    limit: int = 20,
+    api_key: str = Security(get_api_key),
+    db: Session = Depends(get_db)
+):
+    return db.query(DBChargePoint).offset(skip).limit(limit).all()
+
+@router.get(path="/{chargepoint_id}", response_model=ChargePoint)
+async def get_chargepoint(
+    chargepoint_id: UUID,
+    api_key: str = Security(get_api_key),
+    db: Session = Depends(get_db)
+):
+    chargepoint = db.query(DBChargePoint).filter(DBChargePoint.id == chargepoint_id).first()
+    if chargepoint is None:
+        raise HTTPException(status_code=404, detail="Chargepoint not found")
+    return chargepoint
+
+@router.get(path="/{chargepoint_id}/password", response_model=ChargePointPassword)
+async def get_chargepoint_password(
+    chargepoint_id: UUID,
+    api_key: str = Security(get_api_key),
+    db: Session = Depends(get_db)
+):
+    chargepoint = db.query(DBChargePoint).filter(DBChargePoint.id == chargepoint_id).first()
+    if chargepoint is None:
+        raise HTTPException(status_code=404, detail="Chargepoint not found")
+    return ChargePointPassword(password=chargepoint.password)
+
+@router.delete(path="/{chargepoint_id}/password", response_model=ChargePointPassword)
+async def reset_chargepoint_password(
+    chargepoint_id: UUID,
+    api_key: str = Security(get_api_key),
+    db: Session = Depends(get_db)
+):
+    chargepoint = db.query(DBChargePoint).filter(DBChargePoint.id == chargepoint_id).first()
+    if chargepoint is None:
+        raise HTTPException(status_code=404, detail="Chargepoint not found")
+    chargepoint.password = ''.join(random.choice(string.ascii_letters + string.digits) for i in range(24))
+    db.commit()
+    return ChargePointPassword(password=chargepoint.password)
+
+@router.post(path="/", response_model=ChargePoint)
+async def create_chargepoint(
+    chargepoint: ChargePointCreate,
+    api_key: str = Security(get_api_key),
+    db: Session = Depends(get_db)
+):
+    chargepoint_db = DBChargePoint(
+        friendly_name=chargepoint.friendly_name,
+        is_active=chargepoint.is_active,
+        password=''.join(random.choice(string.ascii_letters + string.digits) for i in range(24))
+    )
+    db.add(chargepoint_db)
+    db.commit()
+    db.refresh(chargepoint_db)
+    return chargepoint_db
+
+@router.patch(path="/{chargepoint_id}", response_model=ChargePoint)
+async def update_chargepoint(
+    chargepoint_id: UUID,
+    chargepoint_update: ChargePointUpdate,
+    api_key: str = Security(get_api_key),
+    db: Session = Depends(get_db)
+):
+    chargepoint = db.query(DBChargePoint).filter(DBChargePoint.id == chargepoint_id).first()
+    if chargepoint is None:
+        raise HTTPException(status_code=404, detail="Chargepoint not found")
+    for key, value in chargepoint_update.model_dump(exclude_unset=True).items():
+        setattr(chargepoint, key, value)
+    db.commit()
+    return chargepoint
+
+@router.delete(path="/{chargepoint_id}", response_model=[])
+async def delete_chargepoint(
+    chargepoint_id: UUID,
+    api_key: str = Security(get_api_key),
+    db: Session = Depends(get_db)
+):
+    chargepoint = db.query(DBChargePoint).filter(DBChargePoint.id == chargepoint_id).first()
+    if chargepoint is None:
+        raise HTTPException(status_code=404, detail="Chargepoint not found")
+    db.delete(chargepoint)
+    db.commit()
+    return []
+
+@router.get(path="/{chargepoint_id}/status", response_model=ChargePointConnectionInfo)
+async def get_chargepoint_status(
+    chargepoint_id: UUID,
+    api_key: str = Security(get_api_key)
+):
+    return ChargePointConnectionInfo(
+        connected=chargepoint_manager.is_connected(chargepoint_id)
+    )

app/routers/ocpp_v1.py

@@ -1,24 +1,25 @@
 import logging
 from fastapi import APIRouter, WebSocket, WebSocketException
-from ocpp_proto import chargepoint_manager
+
-from ocpp_proto.chargepoint import ChargePoint
+from app.ocpp_proto import chargepoint_manager
-from util.websocket_wrapper import WebSocketWrapper
+from app.ocpp_proto.chargepoint import ChargePoint
+from app.util.websocket_wrapper import WebSocketWrapper
 
 router = APIRouter()
 
-@router.websocket("/{charging_station_id}")
+@router.websocket("/{charging_station_friendly_name}")
 async def websocket_endpoint(
     *,
     websocket: WebSocket,
-    charging_station_id: str,
+    charging_station_friendly_name: str,
 ):
     """ For every new charging station that connects, create a ChargePoint
     instance and start listening for messages.
     """
-    if (websocket.user.username != charging_station_id):
+    if (websocket.user.friendly_name != charging_station_friendly_name):
         raise WebSocketException(code=1008, reason="Username doesn't match chargepoint identifier")
     
-    logging.info("Charging station '%s' connected", charging_station_id)
+    logging.info("Charging station '%s' (%s) connected", charging_station_friendly_name, websocket.user.id)
 
     # Check protocols
     try:
@@ -42,5 +43,5 @@ async def websocket_endpoint(
 
     # Accept connection and begin communication
     await websocket.accept(subprotocol="ocpp2.0.1")
-    cp = ChargePoint(charging_station_id, WebSocketWrapper(websocket))
+    cp = ChargePoint(charging_station_friendly_name, WebSocketWrapper(websocket))
-    await chargepoint_manager.start(cp)
+    await chargepoint_manager.start(websocket.user.id, cp)

app/schemas/chargepoint.py

@@ -0,0 +1,31 @@
+from datetime import datetime
+from typing import Optional
+from uuid import UUID
+from pydantic import BaseModel
+
+from app.schemas.connector import Connector
+
+class ChargePointBase(BaseModel):
+    friendly_name: str
+    is_active: bool
+
+class ChargePointUpdate(BaseModel):
+    friendly_name: Optional[str] = None
+    is_active: Optional[bool] = None
+
+class ChargePointCreate(ChargePointBase):
+    pass
+
+class ChargePoint(ChargePointBase):
+    id: UUID
+    last_seen: datetime | None
+    connectors: list[Connector] = []
+
+    class Config:
+        from_attributes = True
+
+class ChargePointPassword(BaseModel):
+    password: str
+    
+class ChargePointConnectionInfo(BaseModel):
+    connected: bool

app/schemas/connector.py

@@ -1,4 +1,5 @@
 import enum
+from uuid import UUID
 from pydantic import BaseModel
 
 class ConnectorStatus(enum.Enum):
@@ -9,7 +10,7 @@ class ConnectorStatus(enum.Enum):
     FAULTED = "Faulted"
 
 class Connector(BaseModel):
-    id: str
+    id: UUID
     evse: int
     index: int
     status: ConnectorStatus

app/schemas/id_token.py

@@ -1,6 +1,7 @@
+from uuid import UUID
 from pydantic import BaseModel
 
-from schemas.user import User
+from app.schemas.user import User
 
 class IdTokenBase(BaseModel):
     title: str
@@ -10,7 +11,7 @@ class IdTokenCreate(IdTokenBase):
     pass
 
 class IdToken(IdTokenBase):
-    id: str
+    id: UUID
     owner: User
 
     class Config:

app/schemas/meter_value.py

@@ -1,5 +1,6 @@
 from datetime import datetime
 import enum
+from uuid import UUID
 from pydantic import BaseModel
 
 class PhaseType(enum.Enum):
@@ -42,7 +43,7 @@ class Measurand(enum.Enum):
     VOLTAGE = "Voltage"
 
 class MeterValue(BaseModel):
-    id: str
+    id: UUID
     timestamp: datetime
     measurand: Measurand
     phase_type: PhaseType

app/schemas/transaction.py

@@ -1,5 +1,6 @@
 from datetime import datetime
 import enum
+from uuid import UUID
 from pydantic import BaseModel
 
 class TransactionStatus(enum.Enum):
@@ -30,7 +31,7 @@ class TransactionEventTriggerReason(enum.Enum):
     RESET_COMMAND = "ResetCommand"
 
 class Transaction(BaseModel):
-    id: str
+    id: UUID
     status: TransactionStatus
     started_at: datetime
     ended_at: datetime

app/schemas/user.py

@@ -1,6 +1,7 @@
+from uuid import UUID
 from pydantic import BaseModel
 
-from schemas.id_token import IdToken
+from app.schemas.id_token import IdToken
 
 class UserBase(BaseModel):
     friendly_name: str
@@ -10,7 +11,7 @@ class UserCreate(UserBase):
     pass
 
 class User(UserBase):
-    id: str
+    id: UUID
     id_tokens: list[IdToken] = []
 
     class Config:

app/util/websocket_auth_backend.py

@@ -1,9 +1,13 @@
 import base64
 import binascii
+from uuid import UUID
 from starlette.authentication import (
     AuthCredentials, AuthenticationBackend, AuthenticationError, SimpleUser
 )
 
+from app.database import SessionLocal
+from app.models.chargepoint import ChargePoint
+
 class BasicAuthBackend(AuthenticationBackend):
     async def authenticate(self, conn):
         if "Authorization" not in conn.headers:
@@ -19,5 +23,16 @@ class BasicAuthBackend(AuthenticationBackend):
             raise AuthenticationError('Invalid basic auth credentials')
 
         username, _, password = decoded.partition(":")
-        # TODO: You'd want to verify the username and password here.
+        try:
-        return AuthCredentials(["authenticated"]), SimpleUser(username)
+            id = UUID(username)
+        except (ValueError) as exc:
+            raise AuthenticationError('Invalid basic auth credentials')
+        
+        with SessionLocal() as db:
+            chargepoint = db.query(ChargePoint).filter(ChargePoint.id == id).first()
+            if chargepoint is None:
+                raise AuthenticationError('Invalid basic auth credentials')
+            if chargepoint.password != password:
+                raise AuthenticationError('Invalid basic auth credentials')
+            
+        return AuthCredentials(["authenticated"]), chargepoint

poetry.lock

@@ -1,5 +1,24 @@
 # This file is automatically @generated by Poetry 1.8.2 and should not be changed by hand.
 
+[[package]]
+name = "alembic"
+version = "1.13.1"
+description = "A database migration tool for SQLAlchemy."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "alembic-1.13.1-py3-none-any.whl", hash = "sha256:2edcc97bed0bd3272611ce3a98d98279e9c209e7186e43e75bbb1b2bdfdbcc43"},
+    {file = "alembic-1.13.1.tar.gz", hash = "sha256:4932c8558bf68f2ee92b9bbcb8218671c627064d5b08939437af6d77dc05e595"},
+]
+
+[package.dependencies]
+Mako = "*"
+SQLAlchemy = ">=1.3.0"
+typing-extensions = ">=4"
+
+[package.extras]
+tz = ["backports.zoneinfo"]
+
 [[package]]
 name = "annotated-types"
 version = "0.6.0"
@@ -270,6 +289,94 @@ files = [
 [package.dependencies]
 referencing = ">=0.31.0"
 
+[[package]]
+name = "mako"
+version = "1.3.3"
+description = "A super-fast templating language that borrows the best ideas from the existing templating languages."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "Mako-1.3.3-py3-none-any.whl", hash = "sha256:5324b88089a8978bf76d1629774fcc2f1c07b82acdf00f4c5dd8ceadfffc4b40"},
+    {file = "Mako-1.3.3.tar.gz", hash = "sha256:e16c01d9ab9c11f7290eef1cfefc093fb5a45ee4a3da09e2fec2e4d1bae54e73"},
+]
+
+[package.dependencies]
+MarkupSafe = ">=0.9.2"
+
+[package.extras]
+babel = ["Babel"]
+lingua = ["lingua"]
+testing = ["pytest"]
+
+[[package]]
+name = "markupsafe"
+version = "2.1.5"
+description = "Safely add untrusted strings to HTML/XML markup."
+optional = false
+python-versions = ">=3.7"
+files = [
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+    {file = "MarkupSafe-2.1.5-cp39-cp39-win_amd64.whl", hash = "sha256:fa173ec60341d6bb97a89f5ea19c85c5643c1e7dedebc22f5181eb73573142c5"},
+    {file = "MarkupSafe-2.1.5.tar.gz", hash = "sha256:d283d37a890ba4c1ae73ffadf8046435c76e7bc2247bbb63c00bd1a709c6544b"},
+]
+
 [[package]]
 name = "ocpp"
 version = "0.26.0"
@@ -957,4 +1064,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "599bf05928701049ff4348ad877ab3413c9864c2a5bf41ae047c7bbe0704270f"
+content-hash = "2b9d4a1a7ceaa46c78814156552aea406a0683f55a574d198d8a65917b476e40"

pyproject.toml

@@ -13,6 +13,7 @@ fastapi = "^0.110.0"
 uvicorn = {extras = ["standard"], version = "^0.28.0"}
 websockets = "^12.0"
 sqlalchemy = "^2.0.28"
+alembic = "^1.13.1"
 
 [build-system]
 requires = ["poetry-core"]

src/models/connector.py

@@ -1,14 +0,0 @@
-from sqlalchemy import Column, Enum, ForeignKey, Integer, String
-
-from schemas.connector import ConnectorStatus
-from database import Base
-
-class Connector(Base):
-    __tablename__ = "connectors"
-
-    id = Column(String, primary_key=True)
-    evse = Column(Integer)
-    index = Column(Integer)
-    status = Column(Enum(ConnectorStatus))
-
-    chargepoint_id = Column(String, ForeignKey("chargepoints.id"))

src/models/id_token.py

@@ -1,14 +0,0 @@
-from sqlalchemy import Boolean, Column, ForeignKey, String
-from sqlalchemy.orm import relationship
-
-from database import Base
-
-class IdToken(Base):
-    __tablename__ = "id_tokens"
-
-    id = Column(String, primary_key=True)
-    title = Column(String)
-    is_active = Column(Boolean, default=True)
-
-    owner_id = Column(String, ForeignKey("users.id"))
-    owner = relationship("User", back_populates="id_tokens")

src/models/meter_value.py

@@ -1,16 +0,0 @@
-from sqlalchemy import Column, DateTime, Enum, Float, ForeignKey, String
-
-from database import Base
-from schemas.meter_value import Measurand, PhaseType
-
-class Transaction(Base):
-    __tablename__ = "meter_values"
-
-    id = Column(String, primary_key=True)
-    timestamp = Column(DateTime, index=True)
-    measurand = Column(Enum(Measurand))
-    phase_type = Column(Enum(PhaseType))
-    unit = Column(String)
-    value = Column(Float)
-
-    transaction_id = Column(String, ForeignKey("transactions.id", index=True))

src/models/transaction.py

@@ -1,19 +0,0 @@
-import enum
-from sqlalchemy import Column, DateTime, Enum, Float, ForeignKey, String
-
-from schemas.transaction import TransactionEventTriggerReason, TransactionStatus
-from database import Base
-
-class Transaction(Base):
-    __tablename__ = "transactions"
-
-    id = Column(String, primary_key=True)
-    status = Column(Enum(TransactionStatus), index=True)
-    started_at = Column(DateTime, index=True)
-    ended_at = Column(DateTime, nullable=True, index=True)
-    meter_start = Column(Float)
-    meter_end = Column(Float, nullable=True)
-    end_reason = Column(Enum(TransactionEventTriggerReason))
-
-    connector_id = Column(String, ForeignKey("connectors.id", index=True))
-    id_token_id = Column(String, ForeignKey("id_tokens.id", index= True))

src/models/user.py

@@ -1,12 +0,0 @@
-from sqlalchemy import Boolean, Column, String
-from sqlalchemy.orm import relationship
-
-from database import Base
-
-class User(Base):
-    __tablename__ = "users"
-
-    id = Column(String, primary_key=True)
-    friendly_name = Column(String, unique=True, index=True)
-    is_active = Column(Boolean, default=True)
-    id_tokens = relationship("IdToken", back_populates="owner")

src/ocpp_proto/chargepoint.py

@@ -1,33 +0,0 @@
-from datetime import datetime, UTC
-import os
-from ocpp.routing import on
-from ocpp.v201 import ChargePoint as cp
-from ocpp.v201 import call_result
-from ocpp.v201.enums import Action, RegistrationStatusType, AuthorizationStatusType
-
-class ChargePoint(cp):
-    @on(Action.BootNotification)
-    async def on_boot_notification(self, charging_station, reason, **kwargs):
-        return call_result.BootNotificationPayload(
-            current_time=datetime.now(UTC).isoformat(),
-            interval=int(os.getenv("CS_HEARTBEAT_INTERVAL", "1800")),
-            status=RegistrationStatusType.accepted
-        )
-    
-    @on(Action.Heartbeat)
-    async def on_heartbeat_request(self):
-        return call_result.HeartbeatPayload(
-            current_time=datetime.now(UTC).isoformat()
-        )
-    
-    @on(Action.StatusNotification)
-    async def on_status_notification(self, evse_id, connector_id, connector_status, **kwargs):
-        return call_result.StatusNotificationPayload()
-    
-    @on(Action.Authorize)
-    async def on_authorize(self):
-        return call_result.AuthorizePayload(id_token_info={'status': AuthorizationStatusType.accepted, 'groupIdToken': ""})
-    
-    @on(Action.TransactionEvent)
-    async def on_transaction_event(self):
-        return call_result.TransactionEventPayload()

src/routers/chargepoint_v1.py

@@ -1,45 +0,0 @@
-from fastapi import APIRouter, Security
-from ocpp_proto import chargepoint_manager
-from schemas.chargepoint import ChargePoint
-from security import get_api_key
-
-router = APIRouter(
-    prefix="/chargepoint",
-    tags=["chargepoint"],
-)
-
-@router.get(path="/", response_model=list[ChargePoint])
-async def get_chargepoints(api_key: str = Security(get_api_key)):
-    return
-
-@router.post(path="/", response_model=ChargePoint)
-async def create_chargepoint(api_key: str = Security(get_api_key)):
-    return
-
-@router.get(path="/{chargepoint_id}", response_model=ChargePoint)
-async def get_chargepoint(
-    chargepoint_id: str,
-    api_key: str = Security(get_api_key),
-):
-    return
-
-@router.patch(path="/{chargepoint_id}", response_model=ChargePoint)
-async def update_chargepoint(
-    chargepoint_id: str,
-    api_key: str = Security(get_api_key),
-):
-    return
-
-@router.delete(path="/{chargepoint_id}", response_model=[])
-async def delete_chargepoint(
-    chargepoint_id: str,
-    api_key: str = Security(get_api_key),
-):
-    return
-
-@router.get(path="/{chargepoint_id}/status", response_model=bool)
-async def get_chargepoint(
-    chargepoint_id: str,
-    api_key: str = Security(get_api_key),
-):
-    return chargepoint_manager.is_connected(chargepoint_id)

src/schemas/chargepoint.py

@@ -1,20 +0,0 @@
-from datetime import datetime
-from pydantic import BaseModel
-
-from schemas.connector import Connector
-
-class ChargePointBase(BaseModel):
-    friendly_name: str
-    is_active: bool
-
-class ChargePointCreate(ChargePointBase):
-    pass
-
-class ChargePoint(ChargePointBase):
-    id: str
-    password: str
-    last_seen: datetime
-    connectors: list[Connector] = []
-
-    class Config:
-        from_attributes = True