Add structured logging and better error handling

internal/server/control_handlers.go

@@ -2,9 +2,13 @@ package server
 
 import "net/http"
 
+type reorderRequest struct {
+	Direction string `json:"direction"`
+}
+
 func (server *Server) handlePause(writer http.ResponseWriter, request *http.Request) {
 	if err := server.manager.Pause(request.PathValue("id")); err != nil {
-		writeFailure(writer, err)
+		writeFailure(writer, request, err)
 		return
 	}
 	writeJSON(writer, http.StatusAccepted, startedResponse{Started: true})
@@ -12,24 +16,19 @@ func (server *Server) handlePause(writer http.ResponseWriter, request *http.Requ
 
 func (server *Server) handleResume(writer http.ResponseWriter, request *http.Request) {
 	if err := server.manager.Resume(request.PathValue("id")); err != nil {
-		writeFailure(writer, err)
+		writeFailure(writer, request, err)
 		return
 	}
 	writeJSON(writer, http.StatusAccepted, startedResponse{Started: true})
 }
 
-type reorderRequest struct {
-	Direction string `json:"direction"`
-}
-
 func (server *Server) handleReorder(writer http.ResponseWriter, request *http.Request) {
 	var body reorderRequest
-	if err := decodeJSON(request, &body); err != nil {
-		writeError(writer, http.StatusBadRequest, "invalid request body")
+	if !decodeBody(writer, request, &body) {
 		return
 	}
 	if err := server.manager.Reorder(request.PathValue("id"), body.Direction); err != nil {
-		writeFailure(writer, err)
+		writeFailure(writer, request, err)
 		return
 	}
 	writeJSON(writer, http.StatusOK, startedResponse{Started: true})
@@ -39,9 +38,9 @@ func (server *Server) handleHistory(writer http.ResponseWriter, _ *http.Request)
 	writeJSON(writer, http.StatusOK, server.manager.History())
 }
 
-func (server *Server) handleClearHistory(writer http.ResponseWriter, _ *http.Request) {
+func (server *Server) handleClearHistory(writer http.ResponseWriter, request *http.Request) {
 	if err := server.manager.ClearHistory(); err != nil {
-		writeFailure(writer, err)
+		writeFailure(writer, request, err)
 		return
 	}
 	writer.WriteHeader(http.StatusNoContent)