Merge pull request #376 from Unpackerr/dn2_panic_fix

fix panic

pkg/unpackerr/handlers.go

@@ -185,19 +185,21 @@ func (u *Unpackerr) checkExtractDone() {
 // handleXtractrCallback handles callbacks from the xtractr library for starr apps (not folders).
 // This takes the provided info and logs it then sends it the queue update method.
 func (u *Unpackerr) handleXtractrCallback(resp *xtractr.Response) {
+	if item := u.Map[resp.X.Name]; resp.Done && item != nil {
+		u.updateMetrics(resp, item.App, item.URL)
+	}
+
 	switch {
 	case !resp.Done:
 		u.Printf("Extraction Started: %s, items in queue: %d", resp.X.Name, resp.Queued)
 		u.updateQueueStatus(&newStatus{Name: resp.X.Name, Status: EXTRACTING, Resp: resp}, true)
 	case resp.Error != nil:
 		u.Printf("Extraction Error: %s: %v", resp.X.Name, resp.Error)
 		u.updateQueueStatus(&newStatus{Name: resp.X.Name, Status: EXTRACTFAILED, Resp: resp}, true)
-		u.updateMetrics(resp, u.Map[resp.X.Name].App, u.Map[resp.X.Name].URL)
 	default:
 		u.Printf("Extraction Finished: %s => elapsed: %v, archives: %d, extra archives: %d, "+
 			"files extracted: %d, wrote: %dMiB", resp.X.Name, resp.Elapsed.Round(time.Second),
 			len(resp.Archives), len(resp.Extras), len(resp.NewFiles), resp.Size/mebiByte)
-		u.updateMetrics(resp, u.Map[resp.X.Name].App, u.Map[resp.X.Name].URL)
 		u.updateQueueStatus(&newStatus{Name: resp.X.Name, Status: EXTRACTED, Resp: resp}, true)
 	}
 }