feat(links): create basic link shortening algo

internal/handlers/link.go

@@ -44,8 +44,37 @@ func (h *LinkHandler) ListLinks(w http.ResponseWriter, r *http.Request) {
 	json.NewEncoder(w).Encode(linkList)
 }
 
+func (h *LinkHandler) CreateLink(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+
+	var linkRequest struct {
+		URL          string  `json:"url"`
+		RedirectCode *string `json:"redirect_code,omitempty"`
+	}
+
+	if err := json.NewDecoder(r.Body).Decode(&linkRequest); err != nil {
+		http.Error(w, fmt.Sprintf("Failed to decode request body: %v", err), http.StatusBadRequest)
+		return
+	}
+
+	link, err := h.linkService.CreateLink(r.Context(), linkRequest.URL, linkRequest.RedirectCode)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("Failed to create link: %v", err), http.StatusInternalServerError)
+		return
+	}
+
+	json.NewEncoder(w).Encode(link)
+}
+
 func (h *LinkHandler) GetUrl(w http.ResponseWriter, r *http.Request) {
 	currentCode := r.PathValue("id")
 
-	json.NewEncoder(w).Encode(&Response{Message: currentCode})
+	link, err := h.linkService.GetLink(r.Context(), currentCode)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("Failed to get link: %v", err), http.StatusInternalServerError)
+		return
+	}
+
+	http.Redirect(w, r, link.LongURL, http.StatusFound)
 }

internal/handlers/log_middleware.go

@@ -0,0 +1,46 @@
+package handlers
+
+import (
+	"log"
+	"net/http"
+	"time"
+)
+
+type statusRecorder struct {
+	http.ResponseWriter
+	statusCode int
+}
+
+func (sr *statusRecorder) WriteHeader(code int) {
+	sr.statusCode = code
+	sr.ResponseWriter.WriteHeader(code)
+}
+
+func (sr *statusRecorder) Write(b []byte) (int, error) {
+	if sr.statusCode == 0 {
+		sr.statusCode = http.StatusOK
+	}
+
+	return sr.ResponseWriter.Write(b)
+}
+
+func LogMiddleware(h http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+		rec := &statusRecorder{ResponseWriter: w}
+
+		h.ServeHTTP(rec, r)
+		duration := time.Since(start)
+
+		statusCode := rec.statusCode
+
+		log.Printf("%s %s %s from %s - %d %s in %s\n",
+			r.Method,
+			r.URL.Path,
+			r.Proto,
+			r.RemoteAddr,
+			statusCode,
+			http.StatusText(statusCode),
+			duration.String())
+	})
+}