add delete quote method

backend/handlers.go

@@ -6,6 +6,9 @@ import (
 	"context"
 	"encoding/json"
 	"net/http"
+	"strconv"
+
+	"github.com/go-chi/chi/v5"
 )
 
 // GET /quotes
@@ -56,16 +59,33 @@ func createQuote(w http.ResponseWriter, r *http.Request) {
 
 // DELETE /quotes
 func deleteQuote(w http.ResponseWriter, r *http.Request) {
-	var q Quote
-	err := json.NewDecoder(r.Body).Decode(&q)
+	// get id from URL
+	idParam := chi.URLParam(r, "id")
+
+	// convert string → int
+	id, err := strconv.Atoi(idParam)
 	if err != nil {
-		http.Error(w, "Invalid JSON", 400)
+		http.Error(w, "Invalid ID", http.StatusBadRequest)
 		return
 	}
 
-	err = db.QueryRow(
+	// execute delete
+	commandTag, err := db.Exec(
 		context.Background(),
-		"DELETE FROM hlaskovnik WHERE id = $1 RETURNING *;",
-		q.Id,
-	).Scan(&q.Id)
+		"DELETE FROM quotes WHERE id=$1",
+		id,
+	)
+	if err != nil {
+		http.Error(w, err.Error(), 500)
+		return
+	}
+
+	// check if anything was deleted
+	if commandTag.RowsAffected() == 0 {
+		http.Error(w, "Quote not found", http.StatusNotFound)
+		return
+	}
+
+	// success response
+	w.WriteHeader(http.StatusNoContent) // 204
 }

backend/main.go

@@ -17,6 +17,7 @@ func main() {
 	// routes
 	r.Get("/quotes", getQuotes)
 	r.Post("/quotes", createQuote)
+	r.Delete("/quotes/{id}", deleteQuote)
 
 	port := os.Getenv("PORT")
 	if port == "" {