Add Weather Data API with OpenWeatherMap integration

- Created FastAPI application with SQLite database integration
- Implemented OpenWeatherMap client with caching
- Added endpoints for current weather, forecasts, and history
- Included comprehensive error handling and validation
- Set up Alembic migrations
- Created detailed README with usage examples

generated with BackendIM... (backend.im)

README.md

@@ -1,3 +1,101 @@
-# FastAPI Application
+# Weather Data API
 
-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A powerful and efficient REST API for retrieving weather data from OpenWeatherMap. Built with FastAPI and SQLite.
+
+## Features
+
+- **Current Weather Data**: Get real-time weather data for any location by city name or coordinates
+- **Weather Forecasts**: Retrieve 5-day weather forecasts
+- **Historical Data**: Access historical weather data stored in the database
+- **Built-in Caching**: Reduces API calls to OpenWeatherMap with intelligent caching
+- **Error Handling**: Comprehensive error handling with clear error messages
+- **Database Integration**: Stores weather data in SQLite for persistence
+- **Swagger Documentation**: Interactive API documentation available at `/docs`
+- **Health Check Endpoint**: Easily verify API operational status
+
+## API Endpoints
+
+- `GET /api/v1/weather/current`: Get current weather data
+- `GET /api/v1/weather/forecast`: Get weather forecast data
+- `GET /api/v1/weather/cities`: Get list of cities in the database
+- `GET /api/v1/weather/history/{city_id}`: Get historical weather data for a city
+- `GET /health`: Health check endpoint
+
+## Tech Stack
+
+- **FastAPI**: High-performance web framework for building APIs
+- **SQLAlchemy**: SQL toolkit and ORM for database interactions
+- **Pydantic**: Data validation and settings management
+- **Alembic**: Database migration tool
+- **httpx**: Asynchronous HTTP client for external API calls
+- **SQLite**: Lightweight relational database
+- **Tenacity**: Retry library for robust API calls
+
+## Getting Started
+
+### Prerequisites
+
+- Python 3.8+
+- pip package manager
+
+### Installation
+
+1. Clone the repository:
+   ```
+   git clone <repository-url>
+   cd weatherdataapi
+   ```
+
+2. Install dependencies:
+   ```
+   pip install -r requirements.txt
+   ```
+
+3. Run database migrations:
+   ```
+   alembic upgrade head
+   ```
+
+4. Start the server:
+   ```
+   uvicorn main:app --reload
+   ```
+
+5. Visit the API documentation:
+   ```
+   http://localhost:8000/docs
+   ```
+
+## Environment Variables
+
+The API can be configured using the following environment variables:
+
+- `OPENWEATHERMAP_API_KEY`: Your OpenWeatherMap API key (default is provided)
+- `CACHE_EXPIRE_IN_SECONDS`: Duration for which to cache weather data (default: 1800 seconds)
+
+## Database Schema
+
+The API uses two main data models:
+
+- **City**: Stores information about cities (name, country, coordinates)
+- **WeatherRecord**: Stores weather data points (temperature, humidity, etc.)
+
+## Example Requests
+
+### Get Current Weather by City Name
+
+```
+GET /api/v1/weather/current?city=London&country=GB
+```
+
+### Get Weather Forecast by Coordinates
+
+```
+GET /api/v1/weather/forecast?lat=51.5074&lon=0.1278
+```
+
+### Get Historical Weather Data
+
+```
+GET /api/v1/weather/history/1?start_date=2023-01-01T00:00:00Z&end_date=2023-01-02T00:00:00Z
+```

alembic.ini

@@ -0,0 +1,102 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = alembic
+
+# template used to generate migration files
+# file_template = %%(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-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# 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.
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+sqlalchemy.url = sqlite:///app/storage/db/db.sqlite
+
+
+[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
+
+# 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 +1,84 @@
+import os
+import sys
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+# 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.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
+from app.models import weather
+from app.database.session import Base
+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.
+
+from app.core.config import settings
+config.set_main_option("sqlalchemy.url", settings.SQLALCHEMY_DATABASE_URL)
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    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():
+    run_migrations_offline()
+else:
+    run_migrations_online()

alembic/script.py.mako

@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

alembic/versions/f9a8b7c6d5e4_initial_migration.py

@@ -0,0 +1,66 @@
+"""Initial migration
+
+Revision ID: f9a8b7c6d5e4
+Revises: 
+Create Date: 2025-05-12 10:00:00.000000
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'f9a8b7c6d5e4'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # Create cities table
+    op.create_table(
+        'cities',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('name', sa.String(), nullable=True),
+        sa.Column('country', sa.String(), nullable=True),
+        sa.Column('latitude', sa.Float(), nullable=True),
+        sa.Column('longitude', sa.Float(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_cities_id'), 'cities', ['id'], unique=False)
+    op.create_index(op.f('ix_cities_name'), 'cities', ['name'], unique=False)
+    
+    # Create weather_records table
+    op.create_table(
+        'weather_records',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('city_id', sa.Integer(), nullable=True),
+        sa.Column('temperature', sa.Float(), nullable=True),
+        sa.Column('feels_like', sa.Float(), nullable=True),
+        sa.Column('humidity', sa.Integer(), nullable=True),
+        sa.Column('pressure', sa.Integer(), nullable=True),
+        sa.Column('wind_speed', sa.Float(), nullable=True),
+        sa.Column('wind_direction', sa.Integer(), nullable=True),
+        sa.Column('weather_condition', sa.String(), nullable=True),
+        sa.Column('weather_description', sa.String(), nullable=True),
+        sa.Column('clouds', sa.Integer(), nullable=True),
+        sa.Column('rain_1h', sa.Float(), nullable=True),
+        sa.Column('snow_1h', sa.Float(), nullable=True),
+        sa.Column('timestamp', sa.DateTime(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.ForeignKeyConstraint(['city_id'], ['cities.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_weather_records_id'), 'weather_records', ['id'], unique=False)
+    op.create_index(op.f('ix_weather_records_timestamp'), 'weather_records', ['timestamp'], unique=False)
+
+
+def downgrade():
+    op.drop_index(op.f('ix_weather_records_timestamp'), table_name='weather_records')
+    op.drop_index(op.f('ix_weather_records_id'), table_name='weather_records')
+    op.drop_table('weather_records')
+    op.drop_index(op.f('ix_cities_name'), table_name='cities')
+    op.drop_index(op.f('ix_cities_id'), table_name='cities')
+    op.drop_table('cities')

app/api/endpoints/weather.py

@@ -0,0 +1,193 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+from typing import List, Optional
+from datetime import datetime, timedelta
+
+from app.database.session import get_db
+from app.schemas.weather import (
+    City, CityCreate, WeatherRecord, WeatherRecordCreate,
+    CurrentWeatherResponse, ForecastResponse, ForecastItem,
+    WeatherSearchParams
+)
+from app.crud.weather import city as city_crud
+from app.crud.weather import weather_record as weather_crud
+from app.services.openweather import openweather_client
+
+router = APIRouter()
+
+@router.get("/current", response_model=CurrentWeatherResponse)
+async def get_current_weather(
+    city: Optional[str] = Query(None, description="City name"),
+    country: Optional[str] = Query(None, description="Country code (ISO 3166)"),
+    lat: Optional[float] = Query(None, description="Latitude"),
+    lon: Optional[float] = Query(None, description="Longitude"),
+    db: Session = Depends(get_db)
+):
+    """
+    Get current weather data for a location by city name or coordinates.
+    """
+    # Input validation
+    if (city is None and (lat is None or lon is None)):
+        raise HTTPException(
+            status_code=400,
+            detail="Either city or lat,lon parameters must be provided"
+        )
+    
+    weather_data = None
+    db_city = None
+    
+    # Fetch weather data based on provided parameters
+    if city:
+        # Check if we have this city in our database
+        if country:
+            db_city = city_crud.get_by_name_and_country(db, name=city, country=country)
+        
+        # Fetch from OpenWeatherMap API
+        api_response = await openweather_client.get_current_weather_by_city(city, country)
+        city_data, weather = openweather_client.parse_weather_data(api_response)
+        
+        # Create or update city in database
+        if not db_city:
+            city_create = CityCreate(**city_data)
+            db_city = city_crud.create(db, obj_in=city_create)
+        
+        # Create weather record in database
+        weather.city_id = db_city.id
+        db_weather = weather_crud.create(db, obj_in=weather)
+        
+    else:  # Using coordinates
+        # Check if we have this location in our database
+        db_city = city_crud.get_by_coordinates(db, latitude=lat, longitude=lon)
+        
+        # Fetch from OpenWeatherMap API
+        api_response = await openweather_client.get_current_weather_by_coordinates(lat, lon)
+        city_data, weather = openweather_client.parse_weather_data(api_response)
+        
+        # Create or update city in database
+        if not db_city:
+            city_create = CityCreate(**city_data)
+            db_city = city_crud.create(db, obj_in=city_create)
+        
+        # Create weather record in database
+        weather.city_id = db_city.id
+        db_weather = weather_crud.create(db, obj_in=weather)
+    
+    return CurrentWeatherResponse(city=db_city, weather=db_weather)
+
+@router.get("/forecast", response_model=ForecastResponse)
+async def get_weather_forecast(
+    city: Optional[str] = Query(None, description="City name"),
+    country: Optional[str] = Query(None, description="Country code (ISO 3166)"),
+    lat: Optional[float] = Query(None, description="Latitude"),
+    lon: Optional[float] = Query(None, description="Longitude"),
+    db: Session = Depends(get_db)
+):
+    """
+    Get 5-day weather forecast for a location by city name or coordinates.
+    """
+    # Input validation
+    if (city is None and (lat is None or lon is None)):
+        raise HTTPException(
+            status_code=400,
+            detail="Either city or lat,lon parameters must be provided"
+        )
+    
+    db_city = None
+    forecast_items = []
+    
+    # Fetch forecast data based on provided parameters
+    if city:
+        # Check if we have this city in our database
+        if country:
+            db_city = city_crud.get_by_name_and_country(db, name=city, country=country)
+        
+        # Fetch from OpenWeatherMap API
+        api_response = await openweather_client.get_forecast_by_city(city, country)
+        city_data, forecast_data = openweather_client.parse_forecast_data(api_response)
+        
+        # Create or update city in database
+        if not db_city:
+            city_create = CityCreate(**city_data)
+            db_city = city_crud.create(db, obj_in=city_create)
+        
+        # Process forecast items
+        for item in forecast_data:
+            item.city_id = db_city.id
+            db_item = weather_crud.create(db, obj_in=item)
+            forecast_items.append(ForecastItem(**item.dict()))
+            
+    else:  # Using coordinates
+        # Check if we have this location in our database
+        db_city = city_crud.get_by_coordinates(db, latitude=lat, longitude=lon)
+        
+        # Fetch from OpenWeatherMap API
+        api_response = await openweather_client.get_forecast_by_coordinates(lat, lon)
+        city_data, forecast_data = openweather_client.parse_forecast_data(api_response)
+        
+        # Create or update city in database
+        if not db_city:
+            city_create = CityCreate(**city_data)
+            db_city = city_crud.create(db, obj_in=city_create)
+        
+        # Process forecast items
+        for item in forecast_data:
+            item.city_id = db_city.id
+            db_item = weather_crud.create(db, obj_in=item)
+            forecast_items.append(ForecastItem(**item.dict()))
+    
+    return ForecastResponse(city=db_city, forecast=forecast_items)
+
+@router.get("/cities", response_model=List[City])
+def get_cities(
+    name: Optional[str] = Query(None, description="Filter by city name"),
+    country: Optional[str] = Query(None, description="Filter by country code"),
+    skip: int = 0,
+    limit: int = 100,
+    db: Session = Depends(get_db)
+):
+    """
+    Retrieve cities from the database with optional filtering.
+    """
+    if name and country:
+        city = city_crud.get_by_name_and_country(db, name=name, country=country)
+        return [city] if city else []
+    
+    # Implement simple filtering logic - in a real app, we'd use more sophisticated query building
+    cities = db.query(city_crud.model)
+    
+    if name:
+        cities = cities.filter(city_crud.model.name.ilike(f"%{name}%"))
+    
+    if country:
+        cities = cities.filter(city_crud.model.country == country)
+    
+    return cities.offset(skip).limit(limit).all()
+
+@router.get("/history/{city_id}", response_model=List[WeatherRecord])
+def get_weather_history(
+    city_id: int,
+    start_date: Optional[datetime] = Query(None, description="Start date for historical data"),
+    end_date: Optional[datetime] = Query(None, description="End date for historical data"),
+    db: Session = Depends(get_db)
+):
+    """
+    Get historical weather data for a city.
+    """
+    # Default to past 24 hours if no date range provided
+    if not start_date:
+        start_date = datetime.utcnow() - timedelta(days=1)
+    
+    if not end_date:
+        end_date = datetime.utcnow()
+    
+    # Check if city exists
+    db_city = city_crud.get(db, id=city_id)
+    if not db_city:
+        raise HTTPException(status_code=404, detail="City not found")
+    
+    # Get historical data
+    history = weather_crud.get_history_by_city_id(
+        db, city_id=city_id, start_date=start_date, end_date=end_date
+    )
+    
+    return history

app/api/routes.py

@@ -0,0 +1,5 @@
+from fastapi import APIRouter
+from app.api.endpoints import weather
+
+api_router = APIRouter()
+api_router.include_router(weather.router, prefix="/weather", tags=["weather"])

app/core/config.py

@@ -0,0 +1,33 @@
+import os
+from pathlib import Path
+from pydantic_settings import BaseSettings, SettingsConfigDict
+from dotenv import load_dotenv
+
+# Load .env file if it exists
+load_dotenv()
+
+class Settings(BaseSettings):
+    API_V1_STR: str = "/api/v1"
+    PROJECT_NAME: str = "Weather Data API"
+    
+    # OpenWeatherMap API
+    OPENWEATHERMAP_API_KEY: str = "bd5e378503939ddaee76f12ad7a97608"
+    OPENWEATHERMAP_API_URL: str = "https://api.openweathermap.org/data/2.5"
+    
+    # Cache settings
+    CACHE_EXPIRE_IN_SECONDS: int = 1800  # 30 minutes
+    
+    # Database settings
+    DB_DIR = Path("/app") / "storage" / "db"
+    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
+    
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        case_sensitive=True,
+    )
+
+settings = Settings()
+
+# Create DB directory if it doesn't exist
+settings.DB_DIR.mkdir(parents=True, exist_ok=True)

app/core/exceptions.py

@@ -0,0 +1,143 @@
+from fastapi import HTTPException, Request
+from fastapi.responses import JSONResponse
+from fastapi.exceptions import RequestValidationError
+from starlette.exceptions import HTTPException as StarletteHTTPException
+from typing import Union, Dict, Any
+import logging
+
+# Configure logger
+logger = logging.getLogger(__name__)
+
+class WeatherAPIException(HTTPException):
+    """Base exception class for the Weather API."""
+    def __init__(
+        self,
+        status_code: int,
+        detail: Any = None,
+        headers: Dict[str, str] = None,
+        error_code: str = None
+    ):
+        self.error_code = error_code
+        super().__init__(status_code=status_code, detail=detail, headers=headers)
+
+class ExternalAPIError(WeatherAPIException):
+    """Exception raised when external API calls fail."""
+    def __init__(
+        self,
+        detail: Any = "External API error",
+        status_code: int = 503,
+        headers: Dict[str, str] = None,
+        error_code: str = "external_api_error"
+    ):
+        super().__init__(
+            status_code=status_code,
+            detail=detail,
+            headers=headers,
+            error_code=error_code
+        )
+
+class InvalidParameterError(WeatherAPIException):
+    """Exception raised when request parameters are invalid."""
+    def __init__(
+        self,
+        detail: Any = "Invalid parameters",
+        status_code: int = 400,
+        headers: Dict[str, str] = None,
+        error_code: str = "invalid_parameter"
+    ):
+        super().__init__(
+            status_code=status_code,
+            detail=detail,
+            headers=headers,
+            error_code=error_code
+        )
+
+class ResourceNotFoundError(WeatherAPIException):
+    """Exception raised when a requested resource is not found."""
+    def __init__(
+        self,
+        detail: Any = "Resource not found",
+        status_code: int = 404,
+        headers: Dict[str, str] = None,
+        error_code: str = "resource_not_found"
+    ):
+        super().__init__(
+            status_code=status_code,
+            detail=detail,
+            headers=headers,
+            error_code=error_code
+        )
+
+# Error handlers
+async def http_exception_handler(request: Request, exc: Union[HTTPException, StarletteHTTPException]) -> JSONResponse:
+    """
+    Handle HTTPExceptions and return a standardized JSON response.
+    """
+    headers = getattr(exc, "headers", None)
+    
+    # Log the exception
+    logger.error(f"HTTP Exception: {exc.status_code} - {exc.detail}")
+    
+    # Add more context if it's our custom exception
+    if isinstance(exc, WeatherAPIException):
+        content = {
+            "error": {
+                "code": exc.error_code,
+                "message": exc.detail
+            },
+            "status_code": exc.status_code
+        }
+    else:
+        content = {
+            "error": {
+                "code": "http_error",
+                "message": exc.detail
+            },
+            "status_code": exc.status_code
+        }
+    
+    return JSONResponse(
+        status_code=exc.status_code,
+        content=content,
+        headers=headers
+    )
+
+async def validation_exception_handler(request: Request, exc: RequestValidationError) -> JSONResponse:
+    """
+    Handle validation errors from Pydantic models and return a standardized error response.
+    """
+    # Log the exception
+    logger.error(f"Validation error: {exc.errors()}")
+    
+    # Create a more user-friendly error detail
+    errors = []
+    for error in exc.errors():
+        loc = " -> ".join([str(loc_item) for loc_item in error["loc"]])
+        errors.append({
+            "location": loc,
+            "message": error["msg"],
+            "type": error["type"]
+        })
+    
+    content = {
+        "error": {
+            "code": "validation_error",
+            "message": "Request validation error",
+            "details": errors
+        },
+        "status_code": 422
+    }
+    
+    return JSONResponse(
+        status_code=422,
+        content=content
+    )
+
+# Configure application-wide exception handlers
+def configure_exception_handlers(app):
+    """
+    Configure exception handlers for the FastAPI application.
+    """
+    app.add_exception_handler(HTTPException, http_exception_handler)
+    app.add_exception_handler(StarletteHTTPException, http_exception_handler)
+    app.add_exception_handler(RequestValidationError, validation_exception_handler)

app/crud/base.py

@@ -0,0 +1,64 @@
+from typing import Any, Dict, Generic, List, Optional, Type, TypeVar, Union
+from fastapi.encoders import jsonable_encoder
+from pydantic import BaseModel
+from sqlalchemy.orm import Session
+from sqlalchemy import desc
+
+from app.database.session import Base
+
+ModelType = TypeVar("ModelType", bound=Base)
+CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
+UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
+
+class CRUDBase(Generic[ModelType, CreateSchemaType, UpdateSchemaType]):
+    def __init__(self, model: Type[ModelType]):
+        """
+        CRUD object with default methods to Create, Read, Update, Delete (CRUD).
+        
+        **Parameters**
+        * `model`: A SQLAlchemy model class
+        * `schema`: A Pydantic model (schema) class
+        """
+        self.model = model
+    
+    def get(self, db: Session, id: Any) -> Optional[ModelType]:
+        return db.query(self.model).filter(self.model.id == id).first()
+    
+    def get_multi(
+        self, db: Session, *, skip: int = 0, limit: int = 100
+    ) -> List[ModelType]:
+        return db.query(self.model).offset(skip).limit(limit).all()
+    
+    def create(self, db: Session, *, obj_in: CreateSchemaType) -> ModelType:
+        obj_in_data = jsonable_encoder(obj_in)
+        db_obj = self.model(**obj_in_data)
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+    
+    def update(
+        self,
+        db: Session,
+        *,
+        db_obj: ModelType,
+        obj_in: Union[UpdateSchemaType, Dict[str, Any]]
+    ) -> ModelType:
+        obj_data = jsonable_encoder(db_obj)
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.dict(exclude_unset=True)
+        for field in obj_data:
+            if field in update_data:
+                setattr(db_obj, field, update_data[field])
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+    
+    def remove(self, db: Session, *, id: int) -> ModelType:
+        obj = db.query(self.model).get(id)
+        db.delete(obj)
+        db.commit()
+        return obj

app/crud/weather.py

@@ -0,0 +1,54 @@
+from typing import List, Optional, Dict, Any
+from sqlalchemy.orm import Session
+from sqlalchemy import func
+from datetime import datetime, timedelta
+
+from app.crud.base import CRUDBase
+from app.models.weather import City, WeatherRecord
+from app.schemas.weather import CityCreate, CityUpdate, WeatherRecordCreate
+
+class CRUDCity(CRUDBase[City, CityCreate, CityUpdate]):
+    def get_by_name_and_country(self, db: Session, *, name: str, country: str) -> Optional[City]:
+        return db.query(City).filter(
+            func.lower(City.name) == func.lower(name),
+            func.lower(City.country) == func.lower(country)
+        ).first()
+    
+    def get_by_coordinates(self, db: Session, *, latitude: float, longitude: float) -> Optional[City]:
+        # Use a small delta to find cities by approximate coordinates
+        delta = 0.01  # About 1km at the equator
+        return db.query(City).filter(
+            City.latitude.between(latitude - delta, latitude + delta),
+            City.longitude.between(longitude - delta, longitude + delta)
+        ).first()
+
+class CRUDWeatherRecord(CRUDBase[WeatherRecord, WeatherRecordCreate, WeatherRecordCreate]):
+    def get_latest_by_city_id(self, db: Session, *, city_id: int) -> Optional[WeatherRecord]:
+        return db.query(WeatherRecord).filter(
+            WeatherRecord.city_id == city_id
+        ).order_by(WeatherRecord.timestamp.desc()).first()
+    
+    def get_history_by_city_id(
+        self, db: Session, *, city_id: int, start_date: datetime, end_date: datetime
+    ) -> List[WeatherRecord]:
+        return db.query(WeatherRecord).filter(
+            WeatherRecord.city_id == city_id,
+            WeatherRecord.timestamp.between(start_date, end_date)
+        ).order_by(WeatherRecord.timestamp).all()
+    
+    def get_forecast_by_city_id(
+        self, db: Session, *, city_id: int
+    ) -> List[WeatherRecord]:
+        """
+        Get weather forecast data for a city.
+        In a real application, this might fetch forecasts from an external API,
+        but for this example, we'll just return the most recent data.
+        """
+        current_time = datetime.utcnow()
+        return db.query(WeatherRecord).filter(
+            WeatherRecord.city_id == city_id,
+            WeatherRecord.timestamp >= current_time
+        ).order_by(WeatherRecord.timestamp).all()
+
+city = CRUDCity(City)
+weather_record = CRUDWeatherRecord(WeatherRecord)

app/database/session.py

@@ -0,0 +1,22 @@
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+from app.core.config import settings
+
+engine = create_engine(
+    settings.SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}
+)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
+
+# Dependency to get DB session
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

app/models/weather.py

@@ -0,0 +1,45 @@
+from sqlalchemy import Column, Integer, String, Float, DateTime, ForeignKey
+from sqlalchemy.orm import relationship
+from datetime import datetime
+
+from app.database.session import Base
+
+class City(Base):
+    __tablename__ = "cities"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, index=True)
+    country = Column(String)
+    latitude = Column(Float)
+    longitude = Column(Float)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    weather_records = relationship("WeatherRecord", back_populates="city")
+    
+    def __repr__(self):
+        return f"<City {self.name}, {self.country}>"
+
+class WeatherRecord(Base):
+    __tablename__ = "weather_records"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    city_id = Column(Integer, ForeignKey("cities.id"))
+    temperature = Column(Float)
+    feels_like = Column(Float)
+    humidity = Column(Integer)
+    pressure = Column(Integer)
+    wind_speed = Column(Float)
+    wind_direction = Column(Integer)
+    weather_condition = Column(String)
+    weather_description = Column(String)
+    clouds = Column(Integer)
+    rain_1h = Column(Float, nullable=True)
+    snow_1h = Column(Float, nullable=True)
+    timestamp = Column(DateTime, index=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    
+    city = relationship("City", back_populates="weather_records")
+    
+    def __repr__(self):
+        return f"<WeatherRecord for {self.city.name} at {self.timestamp}>"

app/schemas/weather.py

@@ -0,0 +1,78 @@
+from pydantic import BaseModel, Field
+from datetime import datetime
+from typing import Optional, List
+
+# City schemas
+class CityBase(BaseModel):
+    name: str
+    country: str
+    latitude: float
+    longitude: float
+
+class CityCreate(CityBase):
+    pass
+
+class CityUpdate(CityBase):
+    name: Optional[str] = None
+    country: Optional[str] = None
+    latitude: Optional[float] = None
+    longitude: Optional[float] = None
+
+class CityInDB(CityBase):
+    id: int
+    created_at: datetime
+    updated_at: datetime
+    
+    class Config:
+        from_attributes = True
+
+class City(CityInDB):
+    pass
+
+# Weather record schemas
+class WeatherRecordBase(BaseModel):
+    temperature: float = Field(..., description="Temperature in Kelvin")
+    feels_like: float = Field(..., description="Feels like temperature in Kelvin")
+    humidity: int = Field(..., description="Humidity in percentage")
+    pressure: int = Field(..., description="Atmospheric pressure in hPa")
+    wind_speed: float = Field(..., description="Wind speed in meter/sec")
+    wind_direction: int = Field(..., description="Wind direction in degrees")
+    weather_condition: str = Field(..., description="Main weather condition")
+    weather_description: str = Field(..., description="Weather condition description")
+    clouds: int = Field(..., description="Cloudiness in percentage")
+    rain_1h: Optional[float] = Field(None, description="Rain volume for last hour in mm")
+    snow_1h: Optional[float] = Field(None, description="Snow volume for last hour in mm")
+    timestamp: datetime = Field(..., description="Timestamp of the weather data")
+
+class WeatherRecordCreate(WeatherRecordBase):
+    city_id: int
+
+class WeatherRecordInDB(WeatherRecordBase):
+    id: int
+    city_id: int
+    created_at: datetime
+    
+    class Config:
+        from_attributes = True
+
+class WeatherRecord(WeatherRecordInDB):
+    pass
+
+# Weather response schemas for API
+class CurrentWeatherResponse(BaseModel):
+    city: City
+    weather: WeatherRecord
+
+class ForecastItem(WeatherRecordBase):
+    pass
+
+class ForecastResponse(BaseModel):
+    city: City
+    forecast: List[ForecastItem]
+
+# Search schemas
+class WeatherSearchParams(BaseModel):
+    city: Optional[str] = None
+    country: Optional[str] = None
+    lat: Optional[float] = None
+    lon: Optional[float] = None

app/services/cache.py

@@ -0,0 +1,99 @@
+from typing import Any, Dict, Optional, Callable, TypeVar, Awaitable
+from datetime import datetime, timedelta
+import hashlib
+import json
+
+# In-memory cache
+cache: Dict[str, Dict[str, Any]] = {}
+
+T = TypeVar("T")
+
+class Cache:
+    @staticmethod
+    def _generate_key(prefix: str, *args: Any, **kwargs: Any) -> str:
+        """
+        Generate a unique cache key based on the function arguments.
+        """
+        key_parts = [prefix]
+        
+        # Add positional args to key
+        for arg in args:
+            key_parts.append(str(arg))
+        
+        # Add keyword args to key (sorted by key to ensure consistency)
+        for k, v in sorted(kwargs.items()):
+            key_parts.append(f"{k}={v}")
+        
+        # Join all parts and hash
+        key_data = ":".join(key_parts)
+        return hashlib.md5(key_data.encode()).hexdigest()
+    
+    @staticmethod
+    def set(key: str, value: Any, expire_seconds: int = 1800) -> None:
+        """
+        Store a value in the cache with an expiration time.
+        """
+        expiry = datetime.utcnow() + timedelta(seconds=expire_seconds)
+        cache[key] = {
+            "value": value,
+            "expiry": expiry
+        }
+    
+    @staticmethod
+    def get(key: str) -> Optional[Any]:
+        """
+        Retrieve a value from the cache if it exists and hasn't expired.
+        """
+        if key not in cache:
+            return None
+        
+        cache_item = cache[key]
+        if cache_item["expiry"] < datetime.utcnow():
+            # Remove expired item
+            del cache[key]
+            return None
+        
+        return cache_item["value"]
+    
+    @staticmethod
+    def invalidate(key: str) -> None:
+        """
+        Remove a specific item from the cache.
+        """
+        if key in cache:
+            del cache[key]
+    
+    @staticmethod
+    def clear_all() -> None:
+        """
+        Clear the entire cache.
+        """
+        cache.clear()
+
+def cached(prefix: str, expire_seconds: int = 1800):
+    """
+    Decorator for async functions to cache their results.
+    
+    Args:
+        prefix: Prefix for the cache key to avoid collisions
+        expire_seconds: Time in seconds until the cached result expires
+    """
+    def decorator(func: Callable[..., Awaitable[T]]) -> Callable[..., Awaitable[T]]:
+        async def wrapper(*args: Any, **kwargs: Any) -> T:
+            # Generate a unique key based on function arguments
+            key = Cache._generate_key(prefix, *args, **kwargs)
+            
+            # Check if we have a cached result
+            cached_result = Cache.get(key)
+            if cached_result is not None:
+                return cached_result
+            
+            # Call the original function
+            result = await func(*args, **kwargs)
+            
+            # Cache the result
+            Cache.set(key, result, expire_seconds)
+            
+            return result
+        return wrapper
+    return decorator

app/services/openweather.py

@@ -0,0 +1,177 @@
+import httpx
+from datetime import datetime
+from typing import Dict, Any, Optional, List, Tuple
+from fastapi import HTTPException
+from tenacity import retry, stop_after_attempt, wait_exponential
+
+from app.core.config import settings
+from app.schemas.weather import WeatherRecordCreate
+from app.services.cache import cached
+
+class OpenWeatherMapClient:
+    def __init__(self):
+        self.api_key = settings.OPENWEATHERMAP_API_KEY
+        self.base_url = settings.OPENWEATHERMAP_API_URL
+        self.headers = {
+            "Accept": "application/json",
+            "Content-Type": "application/json"
+        }
+    
+    @retry(
+        stop=stop_after_attempt(3),
+        wait=wait_exponential(multiplier=1, min=2, max=10)
+    )
+    async def _make_request(self, endpoint: str, params: Dict[str, Any]) -> Dict[str, Any]:
+        """
+        Make a request to the OpenWeatherMap API with retry functionality.
+        """
+        params["appid"] = self.api_key
+        
+        async with httpx.AsyncClient() as client:
+            response = await client.get(
+                f"{self.base_url}/{endpoint}",
+                params=params,
+                headers=self.headers,
+                timeout=30.0
+            )
+            
+            if response.status_code != 200:
+                error_detail = response.json().get("message", "Unknown error")
+                raise HTTPException(
+                    status_code=response.status_code,
+                    detail=f"OpenWeatherMap API error: {error_detail}"
+                )
+            
+            return response.json()
+    
+    @cached("current_weather_city", expire_seconds=settings.CACHE_EXPIRE_IN_SECONDS)
+    async def get_current_weather_by_city(self, city_name: str, country_code: Optional[str] = None) -> Dict[str, Any]:
+        """
+        Get current weather for a city by name and optional country code.
+        """
+        q = city_name
+        if country_code:
+            q = f"{city_name},{country_code}"
+
+        params = {
+            "q": q,
+            "units": "metric"
+        }
+
+        return await self._make_request("weather", params)
+    
+    @cached("current_weather_coords", expire_seconds=settings.CACHE_EXPIRE_IN_SECONDS)
+    async def get_current_weather_by_coordinates(self, lat: float, lon: float) -> Dict[str, Any]:
+        """
+        Get current weather for a location by coordinates.
+        """
+        params = {
+            "lat": lat,
+            "lon": lon,
+            "units": "metric"
+        }
+
+        return await self._make_request("weather", params)
+    
+    @cached("forecast_city", expire_seconds=settings.CACHE_EXPIRE_IN_SECONDS)
+    async def get_forecast_by_city(self, city_name: str, country_code: Optional[str] = None) -> Dict[str, Any]:
+        """
+        Get 5-day forecast for a city by name and optional country code.
+        """
+        q = city_name
+        if country_code:
+            q = f"{city_name},{country_code}"
+
+        params = {
+            "q": q,
+            "units": "metric"
+        }
+
+        return await self._make_request("forecast", params)
+    
+    @cached("forecast_coords", expire_seconds=settings.CACHE_EXPIRE_IN_SECONDS)
+    async def get_forecast_by_coordinates(self, lat: float, lon: float) -> Dict[str, Any]:
+        """
+        Get 5-day forecast for a location by coordinates.
+        """
+        params = {
+            "lat": lat,
+            "lon": lon,
+            "units": "metric"
+        }
+
+        return await self._make_request("forecast", params)
+    
+    @staticmethod
+    def parse_weather_data(data: Dict[str, Any]) -> Tuple[Dict[str, Any], WeatherRecordCreate]:
+        """
+        Parse OpenWeatherMap API response into our data models.
+        Returns a tuple of (city_data, weather_data)
+        """
+        # Parse city data
+        city_data = {
+            "name": data.get("name"),
+            "country": data.get("sys", {}).get("country"),
+            "latitude": data.get("coord", {}).get("lat"),
+            "longitude": data.get("coord", {}).get("lon")
+        }
+        
+        # Get the weather data
+        main_data = data.get("main", {})
+        weather_data = {
+            "temperature": main_data.get("temp"),
+            "feels_like": main_data.get("feels_like"),
+            "humidity": main_data.get("humidity"),
+            "pressure": main_data.get("pressure"),
+            "weather_condition": data.get("weather", [{}])[0].get("main", ""),
+            "weather_description": data.get("weather", [{}])[0].get("description", ""),
+            "wind_speed": data.get("wind", {}).get("speed"),
+            "wind_direction": data.get("wind", {}).get("deg"),
+            "clouds": data.get("clouds", {}).get("all"),
+            "rain_1h": data.get("rain", {}).get("1h"),
+            "snow_1h": data.get("snow", {}).get("1h"),
+            "timestamp": datetime.fromtimestamp(data.get("dt", 0)),
+        }
+        
+        return city_data, WeatherRecordCreate(**weather_data, city_id=0)  # City ID will be updated later
+    
+    @staticmethod
+    def parse_forecast_data(data: Dict[str, Any]) -> Tuple[Dict[str, Any], List[WeatherRecordCreate]]:
+        """
+        Parse OpenWeatherMap forecast API response into our data models.
+        Returns a tuple of (city_data, list_of_forecast_items)
+        """
+        city_info = data.get("city", {})
+        
+        # Parse city data
+        city_data = {
+            "name": city_info.get("name"),
+            "country": city_info.get("country"),
+            "latitude": city_info.get("coord", {}).get("lat"),
+            "longitude": city_info.get("coord", {}).get("lon")
+        }
+        
+        # Parse forecast list
+        forecast_items = []
+        for item in data.get("list", []):
+            main_data = item.get("main", {})
+            forecast_item = {
+                "temperature": main_data.get("temp"),
+                "feels_like": main_data.get("feels_like"),
+                "humidity": main_data.get("humidity"),
+                "pressure": main_data.get("pressure"),
+                "weather_condition": item.get("weather", [{}])[0].get("main", ""),
+                "weather_description": item.get("weather", [{}])[0].get("description", ""),
+                "wind_speed": item.get("wind", {}).get("speed"),
+                "wind_direction": item.get("wind", {}).get("deg"),
+                "clouds": item.get("clouds", {}).get("all"),
+                "rain_1h": item.get("rain", {}).get("1h"),
+                "snow_1h": item.get("snow", {}).get("1h"),
+                "timestamp": datetime.fromtimestamp(item.get("dt", 0)),
+            }
+            forecast_items.append(WeatherRecordCreate(**forecast_item, city_id=0))  # City ID will be updated later
+        
+        return city_data, forecast_items
+
+# Create a singleton instance of the client
+openweather_client = OpenWeatherMapClient()

main.py

@@ -0,0 +1,30 @@
+from fastapi import FastAPI
+from app.api.routes import api_router
+from app.core.config import settings
+from app.core.exceptions import configure_exception_handlers
+from app.database.session import Base, engine
+
+# Create database tables
+Base.metadata.create_all(bind=engine)
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    description="Weather Data API for OpenWeatherMap",
+    version="0.1.0",
+    openapi_url=f"{settings.API_V1_STR}/openapi.json",
+    docs_url="/docs",
+    redoc_url="/redoc",
+)
+
+# Configure exception handlers
+configure_exception_handlers(app)
+
+# Include API routes
+app.include_router(api_router, prefix=settings.API_V1_STR)
+
+@app.get("/health", tags=["health"])
+async def health_check():
+    """
+    Health check endpoint to verify the API is running.
+    """
+    return {"status": "ok", "message": "Weather Data API is operational"}

requirements.txt

@@ -0,0 +1,12 @@
+fastapi==0.104.0
+uvicorn==0.23.2
+sqlalchemy==2.0.22
+alembic==1.12.0
+pydantic==2.4.2
+httpx==0.24.1
+python-dotenv==1.0.0
+python-multipart==0.0.6
+email-validator==2.0.0
+pytest==7.4.2
+pathlib==1.0.1
+tenacity==8.2.3