feat: add new db endpoint for getting count of collection

Author: VladPetriv

db.go

@@ -136,6 +136,40 @@ func (database *Database) list(w http.ResponseWriter, r *http.Request) {
 	respond(w, http.StatusOK, result)
 }
 
+func (database *Database) count(w http.ResponseWriter, r *http.Request) {
+	var clauses [][]interface{}
+
+	if err := json.NewDecoder(r.Body).Decode(&clauses); err != nil {
+		// Here we don't return an error because filters are optional
+		database.log.Error().Err(err).Msg("error parsing body")
+	}
+
+	filter, err := backend.DB.ParseQuery(clauses)
+	if err != nil {
+		// Here we don't return an error because filters are optional
+		database.log.Error().Err(err).Msg("error parsing query")
+	}
+
+	conf, auth, err := middleware.Extract(r, true)
+	if err != nil {
+		database.log.Error().Err(err).Msg("error extracting conf and auth")
+		http.Error(w, err.Error(), http.StatusBadRequest)
+
+		return
+	}
+
+	col := getURLPart(r.URL.Path, 3)
+
+	result, err := backend.DB.Count(auth, conf.Name, col, filter)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+
+		return
+	}
+
+	respond(w, http.StatusOK, map[string]int64{"count": result})
+}
+
 func (database *Database) get(w http.ResponseWriter, r *http.Request) {
 	conf, auth, err := middleware.Extract(r, true)
 	if err != nil {

server.go

@@ -142,6 +142,7 @@ func Start(c config.AppConfig, log *logger.Logger) {
 
 	// database routes
 	http.Handle("/db/", middleware.Chain(http.HandlerFunc(database.dbreq), stdAuth...))
+	http.Handle("/db/count/", middleware.Chain(http.HandlerFunc(database.count), stdAuth...))
 	http.Handle("/query/", middleware.Chain(http.HandlerFunc(database.query), stdAuth...))
 	http.Handle("/inc/", middleware.Chain(http.HandlerFunc(database.increase), stdAuth...))
 	http.Handle("/sudoquery/", middleware.Chain(http.HandlerFunc(database.query), stdRoot...))
@@ -216,6 +217,7 @@ func Start(c config.AppConfig, log *logger.Logger) {
 		http.Handle("/localfs/", http.StripPrefix("/localfs/", fs))
 	}
 
+	// count
 	// ui routes
 	webUI := ui{log: log}
 	http.HandleFunc("/ui/login", webUI.auth)