add delete endpoint for blog articles

Signed-off-by: Tobias Erbshäußer <tobias@tesoft.dev>

backend/blog.go

@@ -259,6 +259,27 @@ func (h *ApiHandler) ServeBlogGetSingle(writer http.ResponseWriter, request *htt
 	WriteResponse(writer, http.StatusOK, article)
 }
 
+func (h *ApiHandler) ServeBlogDelete(writer http.ResponseWriter, request *http.Request) {
+	idStr := request.PathValue("id")
+	id, err := strconv.ParseInt(idStr, 10, 64)
+	if err != nil {
+		WriteError(writer, http.StatusBadRequest, "invalid id", err)
+		return
+	}
+
+	err = h.db.DeleteBlogArticle(id)
+	if err != nil {
+		if errors.Is(err, ErrNotFound) {
+			WriteError(writer, http.StatusNotFound, "article not found", nil)
+		} else {
+			WriteError(writer, http.StatusInternalServerError, "failed to update database", err)
+		}
+		return
+	}
+
+	WriteResponse(writer, http.StatusOK, map[string]interface{}{})
+}
+
 func (h *ApiHandler) ServeBlogFileGetSingle(writer http.ResponseWriter, request *http.Request) {
 	idStr := request.PathValue("articleId")
 	articleId, err := strconv.ParseInt(idStr, 10, 64)

backend/db.go

@@ -354,6 +354,43 @@ func (db *Database) SetBlogArticleStatus(id int64, status ArticleStatus) error {
 	return nil
 }
 
+func (db *Database) DeleteBlogArticle(id int64) error {
+	tx, err := db.db.Begin()
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.Exec("DELETE FROM blog_file WHERE article_id = ?", id)
+	if err != nil {
+		_ = tx.Rollback()
+		return err
+	}
+
+	_, err = tx.Exec("DELETE FROM blog_article_to_tag WHERE article_id = ?", id)
+	if err != nil {
+		_ = tx.Rollback()
+		return err
+	}
+
+	res, err := tx.Exec("DELETE FROM blog_article WHERE id = ?", id)
+	if err != nil {
+		_ = tx.Rollback()
+		return err
+	}
+
+	affected, err := res.RowsAffected()
+	if err != nil {
+		_ = tx.Rollback()
+		return err
+	}
+	if affected == 0 {
+		_ = tx.Rollback()
+		return ErrNotFound
+	}
+
+	return tx.Commit()
+}
+
 func (db *Database) GetBlogTags(showAll bool, offset int, limit int) ([]string, int64, error) {
 	filter := ""
 	filterArgs := make([]interface{}, 0)

backend/main.go

@@ -41,6 +41,9 @@ func main() {
 	mux.Handle("GET /api/blog/{id}", apiHandler.ProcessAuth(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
 		apiHandler.ServeBlogGetSingle(writer, request)
 	}), false))
+	mux.Handle("DELETE /api/blog/{id}", apiHandler.ProcessAuth(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		apiHandler.ServeBlogDelete(writer, request)
+	}), true))
 	mux.Handle("GET /api/blog/{articleId}/file/{fileId}", apiHandler.ProcessAuth(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
 		apiHandler.ServeBlogFileGetSingle(writer, request)
 	}), false))