major refactor of main.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)
+}