feat: add delete URL functionality with cache support

Author: ZureTz

frontend/components/url-table/columns.tsx

@@ -250,6 +250,7 @@ export const createColumns = (onDelete?: () => void): ColumnDef<Url>[] => [
             },
             body: JSON.stringify({
               id: url.id,
+              short_code: url.short_code,
             }),
           });
 

internal/cacher/cacher_redis_url.go

@@ -65,3 +65,17 @@ func (c *RedisCacher) GetURLFromCache(ctx context.Context, shortCode string) (*r
 	// Return the URL information
 	return &urlInfo, nil
 }
+
+// DeleteURLFromCache deletes the URL information from the cache using redis
+func (c *RedisCacher) DeleteURLFromCache(ctx context.Context, shortCode string) error {
+	// Delete the URL information from Redis
+	err := c.client.Del(ctx, urlKeyPrefix+shortCode).Err()
+
+	// If the key does not exist, consider it successful
+	if err == redis.Nil {
+		return nil
+	}
+
+	// If there was an error, return it
+	return err
+}

internal/model/url_model.go

@@ -37,11 +37,13 @@ type GetUserShortURLsResponse struct {
 }
 
 type DeleteUserShortURLRequest struct {
-	// Id of the shortened URL to be deleted
+	// Id of the shortened URL to be deleted in the database
 	ID int64 `json:"id" validate:"required,min=1"`
+	// Short code of the URL to be deleted in the cache
+	ShortCode string `json:"short_code" validate:"required,alphanum,min=4,max=10"`
 }
 
 type DeleteUserShortURLResponse struct {
 	// Success message
 	Message string `json:"message"`
-}
+}

internal/service/cacher_interface.go

@@ -9,6 +9,7 @@ type Cacher interface {
 	// For URL service
 	GetURLFromCache(ctx context.Context, shortCode string) (*repo.Url, error)
 	StoreURLToCache(ctx context.Context, urlInfo repo.Url) error
+	DeleteURLFromCache(ctx context.Context, shortCode string) error
 
 	// For User service
 	GetEmailUsingCode(ctx context.Context, emailCode string) (*string, error)

internal/service/url_service.go

@@ -164,6 +164,11 @@ func (s *URLService) GetMyURLs(ctx context.Context, req model.GetUserShortURLsRe
 
 // Delete a short URL created by the user
 func (s *URLService) DeleteShortURL(ctx context.Context, req model.DeleteUserShortURLRequest, username string) (*model.DeleteUserShortURLResponse, error) {
+	// Remove the URL from the cache first
+	if err := s.cacher.DeleteURLFromCache(ctx, req.ShortCode); err != nil {
+		return nil, err
+	}
+
 	// Delete the URL from the database
 	err := s.querier.DeleteURLFromId(ctx, repo.DeleteURLFromIdParams{
 		ID: req.ID,