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)
 }