extend blog articles endpoint to allow to query for tags

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

backend/blog.go

@@ -155,6 +155,7 @@ func (h *ApiHandler) ServeBlogGet(writer http.ResponseWriter, request *http.Requ
 	var err error
 	var offset int
 	var limit int
+	tags := make([]string, 0)
 
 	offsetStr := query.Get("offset")
 	if offsetStr == "" {
@@ -178,13 +179,21 @@ func (h *ApiHandler) ServeBlogGet(writer http.ResponseWriter, request *http.Requ
 		}
 	}
 
-	articles, err := h.db.GetBlogArticles(IsAuthorized(request), offset, limit)
+	tagsStr := query.Get("tags")
+	if tagsStr != "" {
+		tags = strings.Split(tagsStr, ",")
+	}
+
+	articles, total, err := h.db.GetBlogArticles(IsAuthorized(request), offset, limit, tags)
 	if err != nil {
 		WriteError(writer, http.StatusInternalServerError, "failed to query database", err)
 		return
 	}
 
-	WriteResponse(writer, http.StatusOK, articles)
+	WriteResponse(writer, http.StatusOK, map[string]interface{}{
+		"articles": articles,
+		"total":    total,
+	})
 }
 
 func (h *ApiHandler) ServeBlogPut(writer http.ResponseWriter, request *http.Request) {