graph2, changes, rpdata-server: Added changes subscription.

cmd/rpdata-server/main.go

@@ -8,6 +8,9 @@ import (
 	"runtime/debug"
 	"strings"
 
+	"git.aiterp.net/rpdata/api/models"
+	"git.aiterp.net/rpdata/api/models/changes"
+
 	"git.aiterp.net/rpdata/api/models/logs"
 
 	"git.aiterp.net/rpdata/api/graph2"
@@ -35,9 +38,39 @@ func main() {
 		log.Println("Characters updated")
 	}()
 
+	go logListedChanges()
+
 	log.Fatal(http.ListenAndServe(":8081", nil))
 }
 
+func logListedChanges() {
+	sub := changes.Subscribe(context.Background(), nil, true)
+
+	for change := range sub {
+		log.Printf("Change: Author=%#+v Model=%#+v Op=%#+v", change.Author, change.Model, change.Op)
+		for _, object := range change.Objects() {
+			switch object := object.(type) {
+			case models.Log:
+				log.Printf("\tLog: %s (%s)", object.ID, object.ShortID)
+			case models.Character:
+				log.Printf("\tCharacter: %s", object.ID)
+			case models.Channel:
+				log.Printf("\tChannel: %s", object.Name)
+			case models.Post:
+				log.Printf("\tPost: %s", object.ID)
+			case models.Story:
+				log.Printf("\tStory: %s", object.ID)
+			case models.Tag:
+				log.Printf("\tTag: (%s,%s)", object.Kind, object.Name)
+			case models.Chapter:
+				log.Printf("\tChapter: %s", object.ID)
+			}
+		}
+	}
+
+	log.Println("Change subscription closed.")
+}
+
 func queryHandler() http.HandlerFunc {
 	handler := handler.GraphQL(
 		graph2.New(),