feat: add ErrNoSuchMessage to pmapi

Changelog.md

@@ -15,6 +15,7 @@ Changelog [format](http://keepachangelog.com/en/1.0.0/)
 * GODT-282 Completely delete old draft instead moving to trash when user updates draft
 * Adding DSN Sentry as build time parameter
 * GODT-124 bump go-appdir from v1.0.0 to v1.1.0
+* Skip processing message update event if http statuscode is 422
 
 ## [v1.2.6] Donghai - beta (2020-03-XXX)
 

internal/store/event_loop.go

@@ -431,7 +431,7 @@ func (loop *eventLoop) processMessages(eventLog *logrus.Entry, messages []*pmapi
 				msgLog.WithError(err).Warning("Message was not present in DB. Trying fetch...")
 
 				if msg, err = loop.store.fetchMessage(message.ID); err != nil {
-					if err != pmapi.ErrAPINotReachable {
+					if err == pmapi.ErrNoSuchMessage {
 						msgLog.WithError(err).Warn("Skipping message update because message exists neither in local DB nor on API")
 						err = nil
 						continue

pkg/pmapi/client.go

@@ -56,6 +56,8 @@ var (
 	ErrInvalidToken       = errors.New("refresh token invalid")
 	ErrAPINotReachable    = errors.New("cannot reach the server")
 	ErrUpgradeApplication = errors.New("application upgrade required")
+
+	ErrNoSuchMessage = errors.New("no such message")
 )
 
 type ErrUnauthorized struct {

pkg/pmapi/messages.go

@@ -532,7 +532,13 @@ func (c *Client) GetMessage(id string) (msg *Message, err error) {
 		return
 	}
 
+	if res.StatusCode == http.StatusUnprocessableEntity {
+		err = ErrNoSuchMessage
+		return
+	}
+
 	msg, err = res.Message, res.Err()
+
 	return
 }
 

pkg/pmapi/res.go

@@ -17,6 +17,8 @@
 
 package pmapi
 
+import "net/http"
+
 // Common response codes.
 const (
 	CodeOk = 1000