refactor: python to go
This commit is contained in:
Cipher Vance
310
internal/handlers/handlers.go
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310
internal/handlers/handlers.go
Normal file
@@ -0,0 +1,310 @@
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package handlers
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import (
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"text/template"
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"time"
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"landing/internal/config"
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"landing/internal/database"
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"landing/internal/email"
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)
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type Handler struct {
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db *database.DB
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cfg *config.Config
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email *email.Sender
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templatesPath string
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logger *log.Logger
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}
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func New(db *database.DB, cfg *config.Config) *Handler {
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templatesPath := "templates"
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if _, err := os.Stat(templatesPath); os.IsNotExist(err) {
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templatesPath = "./templates"
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}
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return &Handler{
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db: db,
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cfg: cfg,
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email: email.New(cfg),
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templatesPath: templatesPath,
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logger: log.New(os.Stdout, "", log.LstdFlags),
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}
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}
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// loggingMiddleware logs HTTP requests
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func (h *Handler) loggingMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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start := time.Now()
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// Create a custom response writer to capture status code
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wrapped := &responseWriter{ResponseWriter: w, statusCode: http.StatusOK}
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// Call the next handler
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next.ServeHTTP(wrapped, r)
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// Log the request
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duration := time.Since(start)
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statusColor := getStatusColor(wrapped.statusCode)
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methodColor := getMethodColor(r.Method)
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h.logger.Printf(
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"%s %s %s %s %s %d %s",
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methodColor+r.Method+"\033[0m",
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r.RequestURI,
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statusColor+fmt.Sprintf("%d", wrapped.statusCode)+"\033[0m",
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duration.String(),
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r.RemoteAddr,
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wrapped.contentLength,
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r.UserAgent(),
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)
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})
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}
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type responseWriter struct {
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http.ResponseWriter
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statusCode int
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contentLength int
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}
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func (rw *responseWriter) WriteHeader(code int) {
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rw.statusCode = code
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rw.ResponseWriter.WriteHeader(code)
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}
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func (rw *responseWriter) Write(b []byte) (int, error) {
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rw.contentLength = len(b)
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return rw.ResponseWriter.Write(b)
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}
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// Color codes for terminal output
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func getStatusColor(statusCode int) string {
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switch {
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case statusCode >= 200 && statusCode < 300:
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return "\033[32m" // Green
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case statusCode >= 300 && statusCode < 400:
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return "\033[36m" // Cyan
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case statusCode >= 400 && statusCode < 500:
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return "\033[33m" // Yellow
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case statusCode >= 500:
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return "\033[31m" // Red
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default:
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return "\033[37m" // White
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}
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}
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func getMethodColor(method string) string {
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switch method {
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case "GET":
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return "\033[34m" // Blue
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case "POST":
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return "\033[32m" // Green
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case "PUT":
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return "\033[33m" // Yellow
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case "DELETE":
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return "\033[31m" // Red
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default:
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return "\033[37m" // White
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}
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}
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func (h *Handler) Start(host, port string) error {
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mux := http.NewServeMux()
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// Serve static files
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mux.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("./static"))))
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mux.HandleFunc("/", h.indexHandler)
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mux.HandleFunc("/subscribe", h.subscribeHandler)
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mux.HandleFunc("/unsubscribe", h.unsubscribeHandler)
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mux.HandleFunc("/newsletters", h.newslettersHandler)
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mux.HandleFunc("/newsletter/", h.newsletterDetailHandler)
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// Wrap with logging middleware
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handler := h.loggingMiddleware(mux)
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h.logger.Printf("\033[36m▶ Starting server on http://%s:%s\033[0m", host, port)
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return http.ListenAndServe(host+":"+port, handler)
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}
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func (h *Handler) getTemplatePath(name string) string {
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return filepath.Join(h.templatesPath, name)
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}
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func (h *Handler) indexHandler(
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w http.ResponseWriter,
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r *http.Request,
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) {
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if r.Method != http.MethodGet {
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http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
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return
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}
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tmpl, err := template.ParseFiles(
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h.getTemplatePath("base.html"),
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h.getTemplatePath("index.html"),
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)
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if err != nil {
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http.Error(w, fmt.Sprintf("Failed to parse template: %v", err), http.StatusInternalServerError)
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return
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}
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data := map[string]interface{}{
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"IsHome": true,
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}
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tmpl.ExecuteTemplate(w, "base.html", data)
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}
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func (h *Handler) subscribeHandler(
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w http.ResponseWriter,
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r *http.Request,
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) {
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if r.Method != http.MethodPost {
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http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
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return
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}
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var req struct {
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Email string `json:"email"`
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}
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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http.Error(w, "Invalid request", http.StatusBadRequest)
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return
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}
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if req.Email == "" {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusBadRequest)
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json.NewEncoder(w).Encode(map[string]string{
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"error": "Email is required",
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})
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return
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}
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if err := h.db.AddSubscriber(r.Context(), req.Email); err != nil {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusBadRequest)
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json.NewEncoder(w).Encode(map[string]string{
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"error": "Email already exists",
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})
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return
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}
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unsubscribeLink := fmt.Sprintf(
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"%s/unsubscribe?email=%s",
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getBaseURL(r),
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req.Email,
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)
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if err := h.email.SendConfirmationEmail(
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req.Email,
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unsubscribeLink,
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); err != nil {
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h.logger.Printf("❌ Failed to send confirmation email to %s: %v", req.Email, err)
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} else {
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h.logger.Printf("✓ Confirmation email sent to %s", req.Email)
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusCreated)
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json.NewEncoder(w).Encode(map[string]string{
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"message": "Email has been added",
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})
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}
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func (h *Handler) unsubscribeHandler(
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w http.ResponseWriter,
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r *http.Request,
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) {
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email := r.URL.Query().Get("email")
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if email == "" {
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http.Error(w, "No email specified", http.StatusBadRequest)
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return
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}
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if err := h.db.RemoveSubscriber(r.Context(), email); err != nil {
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http.Error(
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w,
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fmt.Sprintf(
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"Email %s was not found or already unsubscribed",
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email,
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),
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http.StatusBadRequest,
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)
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return
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}
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h.logger.Printf("✓ Unsubscribed %s", email)
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w.Header().Set("Content-Type", "text/plain")
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fmt.Fprintf(w, "The email %s has been unsubscribed.", email)
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}
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func (h *Handler) newslettersHandler(
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w http.ResponseWriter,
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r *http.Request,
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) {
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newsletters, err := h.db.GetNewsletters(r.Context())
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if err != nil {
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http.Error(w, "Failed to fetch newsletters", 500)
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return
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}
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tmpl, err := template.ParseFiles(
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h.getTemplatePath("base.html"),
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h.getTemplatePath("newsletters.html"),
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)
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if err != nil {
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http.Error(w, fmt.Sprintf("Failed to parse template: %v", err), http.StatusInternalServerError)
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return
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}
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tmpl.ExecuteTemplate(w, "base.html", newsletters)
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}
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func (h *Handler) newsletterDetailHandler(
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w http.ResponseWriter,
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r *http.Request,
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) {
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idStr := r.URL.Path[len("/newsletter/"):]
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id, err := strconv.Atoi(idStr)
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if err != nil {
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http.Error(w, "Invalid newsletter ID", http.StatusBadRequest)
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return
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}
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newsletter, err := h.db.GetNewsletter(r.Context(), id)
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if err != nil {
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http.Error(w, "Newsletter not found", http.StatusNotFound)
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return
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}
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tmpl, err := template.ParseFiles(
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h.getTemplatePath("base.html"),
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h.getTemplatePath("newsletter_detail.html"),
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)
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if err != nil {
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http.Error(w, fmt.Sprintf("Failed to parse template: %v", err), http.StatusInternalServerError)
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return
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}
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tmpl.ExecuteTemplate(w, "base.html", newsletter)
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}
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func getBaseURL(r *http.Request) string {
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scheme := "http"
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if r.TLS != nil {
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scheme = "https"
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}
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return fmt.Sprintf("%s://%s", scheme, r.Host)
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}
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