Stop tasks and show task progress (#181)

* Add job status to tasks page

* Add support for stopping task

* Show progress of some tasks

pkg/api/resolver_query_metadata.go

@@ -31,3 +31,18 @@ func (r *queryResolver) MetadataClean(ctx context.Context) (string, error) {
 	manager.GetInstance().Clean()
 	return "todo", nil
 }
+
+func (r *queryResolver) JobStatus(ctx context.Context) (*models.MetadataUpdateStatus, error) {
+	status := manager.GetInstance().Status
+	ret := models.MetadataUpdateStatus{
+		Progress: status.Progress,
+		Status:   status.Status.String(),
+		Message:  "",
+	}
+
+	return &ret, nil
+}
+
+func (r *queryResolver) StopJob(ctx context.Context) (bool, error) {
+	return manager.GetInstance().Status.Stop(), nil
+}

pkg/api/resolver_subscription_metadata.go

@@ -2,20 +2,32 @@ package api
 
 import (
 	"context"
-	"github.com/stashapp/stash/pkg/manager"
 	"time"
+
+	"github.com/stashapp/stash/pkg/manager"
+	"github.com/stashapp/stash/pkg/models"
 )
 
-func (r *subscriptionResolver) MetadataUpdate(ctx context.Context) (<-chan string, error) {
-	msg := make(chan string, 1)
+func (r *subscriptionResolver) MetadataUpdate(ctx context.Context) (<-chan *models.MetadataUpdateStatus, error) {
+	msg := make(chan *models.MetadataUpdateStatus, 1)
 
 	ticker := time.NewTicker(5 * time.Second)
 
 	go func() {
+		lastStatus := manager.TaskStatus{}
 		for {
 			select {
 			case _ = <-ticker.C:
-				manager.GetInstance().HandleMetadataUpdateSubscriptionTick(msg)
+				thisStatus := manager.GetInstance().Status
+				if thisStatus != lastStatus {
+					ret := models.MetadataUpdateStatus{
+						Progress: thisStatus.Progress,
+						Status:   thisStatus.Status.String(),
+						Message:  "",
+					}
+					msg <- &ret
+				}
+				lastStatus = thisStatus
 			case <-ctx.Done():
 				ticker.Stop()
 				close(msg)