major refactor of main.go

config/config.go

@@ -0,0 +1,36 @@
+package config
+
+import (
+	"log"
+	"os"
+)
+
+type Config struct {
+	APIKey      string
+	DefaultCity string
+	DBHost      string
+	DBPort      string
+	DBUser      string
+	DBPassword  string
+	DBName      string
+}
+
+func GetEnv(key string) string {
+	val := os.Getenv(key)
+	if val == "" {
+		log.Fatalf("missing required env var: %s", key)
+	}
+	return val
+}
+
+func Load() *Config {
+	return &Config{
+		APIKey:      GetEnv("OPENWEATHERMAP_API_KEY"),
+		DefaultCity: GetEnv("WEATHER_CITY"),
+		DBHost:      GetEnv("DB_HOST"),
+		DBPort:      GetEnv("DB_PORT"),
+		DBUser:      GetEnv("DB_USER"),
+		DBPassword:  GetEnv("DB_PASSWORD"),
+		DBName:      GetEnv("DB_NAME"),
+	}
+}

go.mod

@@ -1,4 +1,4 @@
-module gitea.coupxd.com/cody/go-weather
+module go-weather
 
 go 1.25.6
 

handlers/health.go

@@ -0,0 +1,32 @@
+package handlers
+
+import (
+	"encoding/json"
+	"go-weather/models"
+	"net/http"
+)
+
+func Health(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(models.HealthResponse{Status: "ok"})
+}
+func LatestTemperature(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(models.LatestTemperatureResponse{Temp: 69})
+}
+func Test(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(models.TestResponse{Status: "hello from go"})
+}

handlers/weather.go

@@ -0,0 +1,69 @@
+package handlers
+
+import (
+	"encoding/json"
+	"go-weather/services"
+	"net/http"
+)
+
+type WeatherHandler struct {
+	weatherService *services.WeatherService
+	dbService      *services.DatabaseService
+	config         struct {
+		DefaultCity string
+	}
+}
+
+func NewWeatherHandler(ws *services.WeatherService, ds *services.DatabaseService, defaultCity string) *WeatherHandler {
+	return &WeatherHandler{
+		weatherService: ws,
+		dbService:      ds,
+		config:         struct{ DefaultCity string }{DefaultCity: defaultCity},
+	}
+}
+
+func (h *WeatherHandler) FetchWeather(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	city := r.URL.Query().Get("city")
+	if city == "" {
+		city = h.config.DefaultCity
+	}
+	weather, err := h.weatherService.FetchWeather(city)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadGateway)
+		return
+	}
+	id, err := h.dbService.SaveReading(weather)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(map[string]interface{}{
+		"message": "weather fetched and saved",
+		"id":      id,
+		"city":    weather.Name,
+		"temp":    weather.Main.Temp,
+	})
+}
+
+func (h *WeatherHandler) GetHistory(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	city := r.URL.Query().Get("city")
+	if city == "" {
+		city = h.config.DefaultCity
+	}
+	readings, err := h.dbService.GetReadings(city, 25)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(readings)
+}

main.go

@@ -2,332 +2,94 @@ package main
 
 import (
 	"database/sql"
-	"encoding/json"
 	"fmt"
+	_ "github.com/lib/pq"
+	"go-weather/config"
+	"go-weather/handlers"
+	"go-weather/services"
 	"log"
 	"net/http"
 	"os"
 	"os/signal"
 	"time"
-
-	_ "github.com/lib/pq"
 )
 
-type WeatherResponse struct {
+func startPoller(db *sql.DB, ws *services.WeatherService, defaultCity string, interval time.Duration) {
-	Name string `json:"name"`
+	// Use the service
-	Main struct {
+	weather, err := ws.FetchWeather(defaultCity)
-		Temp      float64 `json:"temp"`
-		FeelsLike float64 `json:"feels_like"`
-		Humidity  int     `json:"humidity"`
-	}
-
-	Weather []struct {
-		Description string `json:"description"`
-	} `json:"weather"`
-}
-
-type Reading struct {
-	ID         int       `json:"id"`
-	City       string    `json:"city"`
-	Temp       float64   `json:"temp"`
-	FeelsLike  float64   `json:"feels_like"`
-	Humidity   int       `json:"humidity"`
-	Conditions string    `json:"conditions"`
-	FetchedAt  time.Time `json:"fetched_at"`
-}
-
-type HealthResponse struct {
-	Status string `json:"status"`
-}
-
-type TestResponse struct {
-	Status string `json:"status"`
-}
-
-type LatestTemperatureResponse struct {
-	Temp int `json:"temp"`
-}
-
-
-func getEnv(key string) string {
-	val := os.Getenv(key)
-	if val == "" {
-		log.Fatalf("missing required env var: %s", key)
-	}
-	return val
-}
-
-func connectDB() *sql.DB {
-	connStr := fmt.Sprintf(
-		"host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
-		getEnv("DB_HOST"),
-		getEnv("DB_PORT"),
-		getEnv("DB_USER"),
-		getEnv("DB_PASSWORD"),
-		getEnv("DB_NAME"),
-	)
-
-	db, err := sql.Open("postgres", connStr)
-	if err != nil {
-		log.Fatalf("failed to connect to db: %v", err)
-	}
-
-	err = db.Ping()
-	if err != nil {
-		log.Fatalf("failed to connect to db: %v", err)
-	}
-
-	fmt.Println("connected to PostgreSQL")
-	return db
-}
-
-func createTable(db *sql.DB) {
-	_, err := db.Exec(`
-		CREATE TABLE IF NOT EXISTS weather_readings (
-			id SERIAL PRIMARY KEY,
-			city TEXT NOT NULL,
-			temp DOUBLE PRECISION NOT NULL,
-			feels_like DOUBLE PRECISION NOT NULL,
-			humidity INTEGER NOT NULL,
-			conditions TEXT NOT NULL,
-			fetched_at TIMESTAMP WITH TIME ZONE NOT NULL
-		)
-	`)
-
-	if err != nil {
-		log.Fatalf("failed to create table: %v", err)
-	}
-	fmt.Println("weather_readings table ready")
-}
-
-func saveReading(db *sql.DB, weather WeatherResponse) (int, error) {
-	conditions := ""
-	if len(weather.Weather) > 0 {
-		conditions = weather.Weather[0].Description
-	}
-
-	var id int
-	err := db.QueryRow(
-		`INSERT INTO weather_readings (city, temp, feels_like, humidity, conditions, fetched_at)
-		VALUES ($1, $2, $3, $4, $5, $6)
-		RETURNING id`,
-		weather.Name,
-		weather.Main.Temp,
-		weather.Main.FeelsLike,
-		weather.Main.Humidity,
-		conditions,
-		time.Now(),
-	).Scan(&id)
-	if err != nil {
-		return 0, fmt.Errorf("failed to save reading: %w", err)
-	}
-	return id, nil
-}
-
-func getReadings(db *sql.DB, city string, limit int) ([]Reading, error) {
-	rows, err := db.Query(
-		`SELECT id, city, temp, feels_like, humidity, conditions, fetched_at
-		 FROM weather_readings
-		 WHERE city ILIKE $1
-		 ORDER BY fetched_at DESC
-		 LIMIT $2`,
-		city, limit,
-	)
-
-	if err != nil {
-		return nil, fmt.Errorf("Query failed: %w", err)
-	}
-	defer rows.Close()
-
-	var readings []Reading
-	for rows.Next() {
-		var r Reading
-		err := rows.Scan(&r.ID, &r.City, &r.Temp, &r.FeelsLike, &r.Humidity, &r.Conditions, &r.FetchedAt)
-
-		if err != nil {
-			return nil, fmt.Errorf("scan failed: %w", err)
-		}
-
-		readings = append(readings, r)
-	}
-	return readings, nil
-}
-
-func fetchWeather(apiKey, city string) (WeatherResponse, error) {
-	url := fmt.Sprintf(
-		"https://api.openweathermap.org/data/2.5/weather?q=%s&appid=%s&units=imperial",
-		city, apiKey,
-	)
-	resp, err := http.Get(url)
-
-	if err != nil {
-		return WeatherResponse{}, fmt.Errorf("request failed: %w", err)
-	}
-	defer resp.Body.Close()
-
-	if resp.StatusCode != http.StatusOK {
-		return WeatherResponse{}, fmt.Errorf("API returned status %d", resp.StatusCode)
-	}
-
-	var weather WeatherResponse
-	err = json.NewDecoder(resp.Body).Decode(&weather)
-	if err != nil {
-		return WeatherResponse{}, fmt.Errorf("failed to parse response: %w", err)
-	}
-	return weather, nil
-}
-
-func startPoller(db *sql.DB, apiKey, city string, interval time.Duration) {
-	weather, err := fetchWeather(apiKey, city)
 	if err != nil {
 		log.Printf("poller: fetch failed: %v", err)
 	} else {
-		id, err := saveReading(db, weather)
+		ds := services.NewDatabaseService(db)
+		id, err := ds.SaveReading(weather)
 		if err != nil {
 			log.Printf("poller: save failed %v", err)
 		} else {
 			log.Printf("poller: saved reading #%d for %s (%.1f F)", id, weather.Name, weather.Main.Temp)
 		}
 	}
-
 	ticker := time.NewTicker(interval)
 	defer ticker.Stop()
-
 	for range ticker.C {
-		weather, err := fetchWeather(apiKey, city)
+		weather, err := ws.FetchWeather(defaultCity)
 		if err != nil {
 			log.Printf("poller fetch failed: %v", err)
-			continue // don't crash
+			continue
 		}
-
+		ds := services.NewDatabaseService(db)
-		id, err := saveReading(db, weather)
+		id, err := ds.SaveReading(weather)
 		if err != nil {
 			log.Printf("poller: save failed: %v", err)
 			continue
 		}
 		log.Printf("poller: saved reading #%d for %s (%.1f F)", id, weather.Name, weather.Main.Temp)
 	}
-
 }
-
 func main() {
-	apiKey := getEnv("OPENWEATHERMAP_API_KEY")
+	config := config.Load()
-	defaultCity := getEnv("WEATHER_CITY")
+	// Connect to DB
+	connStr := fmt.Sprintf(
+		"host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
+		config.DBHost, config.DBPort, config.DBUser, config.DBPassword, config.DBName,
+	)
 
-	db := connectDB()
+	database, err := services.ConnectDB(connStr)
-	defer db.Close()
-
-	createTable(db)
-
-	// Start background polling in a goroutine
-	go startPoller(db, apiKey, defaultCity, 10*time.Minute)
-
-	// POST /weather/fetch?city=London - fetch current weather and save it
-	http.HandleFunc("/weather/fetch", func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodPost {
-			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
-			return
-		}
-
-		city := r.URL.Query().Get("city")
-		if city == "" {
-			city = defaultCity
-		}
-
-		weather, err := fetchWeather(apiKey, city)
 	if err != nil {
-			http.Error(w, err.Error(), http.StatusBadGateway)
+		log.Fatalf("failed to connect to db: %v", err)
-			return
+	}
+	defer database.Close()
+	databaseService := services.NewDatabaseService(database)
+
+	// Setup weather_readings table
+	if err := databaseService.CreateTable(); err != nil {
+		log.Fatalf("failed to create table: %v", err)
 	}
 
-		// note closure
+	// Create services
-		id, err := saveReading(db, weather)
+	weatherService := services.NewWeatherService(config.APIKey)
-		if err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
 
-		w.Header().Set("Content-Type", "application/json")
+	// Create route handlers
-		json.NewEncoder(w).Encode(map[string]interface{}{
+	weatherHandler := handlers.NewWeatherHandler(weatherService, databaseService, config.DefaultCity)
-			"message": "weather fetched and saved",
-			"id":      id,
-			"city":    weather.Name,
-			"temp":    weather.Main.Temp,
-		})
-	})
 
-	// GET /health
+	// Start background poller
-	http.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
+	go startPoller(database, weatherService, config.DefaultCity, 10*time.Minute)
-		// TODO: Check if database is ready as well
-		if r.Method != http.MethodGet {
-			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
-			return
-		}
-		okStatus := HealthResponse{Status: "ok"}
-
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(okStatus)
-	})
-
-	// GET /latest-temperature
-	http.HandleFunc("/latest-temperature", func(w http.ResponseWriter, r *http.Request) {
-		// testing api integration
-		if r.Method != http.MethodGet {
-			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
-			return
-		}
-		okStatus := LatestTemperatureResponse{Temp: 69}
-
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(okStatus)
-	})
-
-	// GET /test
-	http.HandleFunc("/test", func(w http.ResponseWriter, r *http.Request) {
-		// testing deployment pipeline
-		if r.Method != http.MethodGet {
-			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
-			return
-		}
-		okStatus := TestResponse{Status: "hello from go"}
-
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(okStatus)
-	})
-
-	// GET /weather/history?city=London&limit=10
-	http.HandleFunc("/weather/history", func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodGet {
-			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
-		}
-
-		city := r.URL.Query().Get("city")
-		if city == "" {
-			city = defaultCity
-		}
-
-		// note closure
-		readings, err := getReadings(db, city, 25)
-		if err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
-
-		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(readings)
-	})
 
+	// Register routes
+	http.HandleFunc("/weather/fetch", weatherHandler.FetchWeather)
+	http.HandleFunc("/weather/history", weatherHandler.GetHistory)
+	http.HandleFunc("/health", handlers.Health)
+	http.HandleFunc("/latest-temperature", handlers.LatestTemperature)
+	http.HandleFunc("/test", handlers.Test)
+	// Start server
 	go func() {
 		fmt.Println("server listening on :8080")
 		if err := http.ListenAndServe(":8080", nil); err != nil {
 			log.Fatalf("server failed: %v", err)
 		}
 	}()
-
+	// Wait for shutdown
-	// wait for Ctrl+C
 	quit := make(chan os.Signal, 1)
 	signal.Notify(quit, os.Interrupt)
 	<-quit
 	fmt.Println("\nshutting down...")
-
 }

models/weather.go

@@ -0,0 +1,40 @@
+package models
+
+import (
+	"time"
+)
+
+type WeatherResponse struct {
+	Name string `json:"name"`
+	Main struct {
+		Temp      float64 `json:"temp"`
+		FeelsLike float64 `json:"feels_like"`
+		Humidity  int     `json:"humidity"`
+	}
+
+	Weather []struct {
+		Description string `json:"description"`
+	} `json:"weather"`
+}
+
+type Reading struct {
+	ID         int       `json:"id"`
+	City       string    `json:"city"`
+	Temp       float64   `json:"temp"`
+	FeelsLike  float64   `json:"feels_like"`
+	Humidity   int       `json:"humidity"`
+	Conditions string    `json:"conditions"`
+	FetchedAt  time.Time `json:"fetched_at"`
+}
+
+type HealthResponse struct {
+	Status string `json:"status"`
+}
+
+type TestResponse struct {
+	Status string `json:"status"`
+}
+
+type LatestTemperatureResponse struct {
+	Temp int `json:"temp"`
+}

services/database.go

@@ -0,0 +1,105 @@
+package services
+
+import (
+	"database/sql"
+	"fmt"
+	_ "github.com/lib/pq"
+	"go-weather/models"
+	"time"
+)
+
+func ConnectDB(connStr string) (*sql.DB, error) {
+	db, err := sql.Open("postgres", connStr)
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to db: %v", err)
+	}
+
+	err = db.Ping()
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to db: %v", err)
+	}
+
+	fmt.Println("connected to PostgreSQL")
+	return db, nil
+}
+
+type DatabaseService struct {
+	db *sql.DB
+}
+
+func NewDatabaseService(db *sql.DB) *DatabaseService {
+	return &DatabaseService{db: db}
+}
+
+func (s *DatabaseService) CreateTable() error {
+	_, err := s.db.Exec(`
+		CREATE TABLE IF NOT EXISTS weather_readings (
+			id SERIAL PRIMARY KEY,
+			city TEXT NOT NULL,
+			temp DOUBLE PRECISION NOT NULL,
+			feels_like DOUBLE PRECISION NOT NULL,
+			humidity INTEGER NOT NULL,
+			conditions TEXT NOT NULL,
+			fetched_at TIMESTAMP WITH TIME ZONE NOT NULL
+		)
+	`)
+
+	if err != nil {
+		fmt.Errorf("failed to create table: %v", err)
+	}
+	fmt.Println("weather_readings table ready")
+	return nil
+}
+
+func (s *DatabaseService) SaveReading(weather models.WeatherResponse) (int, error) {
+	conditions := ""
+	if len(weather.Weather) > 0 {
+		conditions = weather.Weather[0].Description
+	}
+
+	var id int
+	err := s.db.QueryRow(
+		`INSERT INTO weather_readings (city, temp, feels_like, humidity, conditions, fetched_at)
+		VALUES ($1, $2, $3, $4, $5, $6)
+		RETURNING id`,
+		weather.Name,
+		weather.Main.Temp,
+		weather.Main.FeelsLike,
+		weather.Main.Humidity,
+		conditions,
+		time.Now(),
+	).Scan(&id)
+	if err != nil {
+		return 0, fmt.Errorf("failed to save reading: %w", err)
+	}
+	return id, nil
+}
+
+func (s *DatabaseService) GetReadings(city string, limit int) ([]models.Reading, error) {
+	rows, err := s.db.Query(
+		`SELECT id, city, temp, feels_like, humidity, conditions, fetched_at
+		 FROM weather_readings
+		 WHERE city ILIKE $1
+		 ORDER BY fetched_at DESC
+		 LIMIT $2`,
+		city, limit,
+	)
+
+	if err != nil {
+		return nil, fmt.Errorf("Query failed: %w", err)
+	}
+	defer rows.Close()
+
+	var readings []models.Reading
+	for rows.Next() {
+		var r models.Reading
+		err := rows.Scan(&r.ID, &r.City, &r.Temp, &r.FeelsLike, &r.Humidity, &r.Conditions, &r.FetchedAt)
+
+		if err != nil {
+			return nil, fmt.Errorf("scan failed: %w", err)
+		}
+
+		readings = append(readings, r)
+	}
+	return readings, nil
+}

services/weather.go

@@ -0,0 +1,40 @@
+package services
+
+import (
+	"encoding/json"
+	"fmt"
+	"go-weather/models"
+	"net/http"
+)
+
+type WeatherService struct {
+	apiKey string
+}
+
+func NewWeatherService(apiKey string) *WeatherService {
+	return &WeatherService{apiKey: apiKey}
+}
+
+func (s *WeatherService) FetchWeather(city string) (models.WeatherResponse, error) {
+	url := fmt.Sprintf(
+		"https://api.openweathermap.org/data/2.5/weather?q=%s&appid=%s&units=imperial",
+		city, s.apiKey,
+	)
+	resp, err := http.Get(url)
+
+	if err != nil {
+		return models.WeatherResponse{}, fmt.Errorf("request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return models.WeatherResponse{}, fmt.Errorf("API returned status %d", resp.StatusCode)
+	}
+
+	var weather models.WeatherResponse
+	err = json.NewDecoder(resp.Body).Decode(&weather)
+	if err != nil {
+		return models.WeatherResponse{}, fmt.Errorf("failed to parse response: %w", err)
+	}
+	return weather, nil
+}