first commit

internal/handlers/links.go

@@ -0,0 +1,93 @@
+package handlers
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"example.com/m/internal/services"
+	"github.com/gin-gonic/gin"
+)
+
+type LinksHandler struct {
+	service *services.LinksService
+	host    string
+	port    string
+}
+
+type CreateLinkResponse struct {
+	Status       string `json:"status"`
+	ShortLink    string `json:"short_link"`
+	OriginalLink string `json:"original_link"`
+	ExpiresIn    string `json:"expires_in"`
+}
+
+func NewLinksHandler(service *services.LinksService, host string, port string) *LinksHandler {
+	return &LinksHandler{service: service, host: host, port: port}
+}
+
+func (h *LinksHandler) CreateLink(c *gin.Context) {
+	link := c.Param("link")
+	link = strings.TrimPrefix(link, "/")
+	if c.Request.URL.RawQuery != "" {
+		link += "?" + c.Request.URL.RawQuery
+	}
+
+	link, err := NormalizeURL(link)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "failed", "message": "invalid link"})
+		return
+	}
+
+	id, err := h.service.CreateLink(link)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed", "message": "failed to create link"})
+		return
+	}
+
+	address := fmt.Sprintf("http://%v:%s/r/%v", h.host, h.port, id)
+
+	response := CreateLinkResponse{
+		Status:       "success",
+		ShortLink:    address,
+		OriginalLink: link,
+		ExpiresIn:    "30d",
+	}
+
+	c.JSON(http.StatusOK, response)
+}
+
+func (h *LinksHandler) Redirect(c *gin.Context) {
+	id := c.Param("id")
+	original, err := h.service.GetLink(id)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "failed", "message": "link not found"})
+		return
+	}
+
+	c.Redirect(http.StatusFound, original)
+}
+
+func NormalizeURL(raw string) (string, error) {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return "", errors.New("empty URL")
+	}
+
+	if !strings.HasPrefix(raw, "http://") && !strings.HasPrefix(raw, "https://") {
+		raw = "https://" + raw
+	}
+
+	u, err := url.Parse(raw)
+	if err != nil {
+		return "", errors.New("invalid URL")
+	}
+
+	if u.Host == "" {
+		return "", errors.New("invalid host in URL")
+	}
+
+	return u.String(), nil
+}

internal/handlers/ping.go

@@ -0,0 +1,11 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+func Ping(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{"status": "success"})
+}