feat(metrics): add total number of attachments metric

pkg/metrics/metrics.go

@@ -28,11 +28,12 @@ import (
 )
 
 const (
-	ProjectCountKey = `project_count`
+	ProjectCountKey     = `project_count`
-	UserCountKey    = `user_count`
+	UserCountKey        = `user_count`
-	TaskCountKey    = `task_count`
+	TaskCountKey        = `task_count`
-	TeamCountKey    = `team_count`
+	TeamCountKey        = `team_count`
-	FilesCountKey   = `files_count`
+	FilesCountKey       = `files_count`
+	AttachmentsCountKey = `attachments_count`
 )
 
 var registry *prometheus.Registry
@@ -69,6 +70,7 @@ func InitMetrics() {
 	registerPromMetric(TaskCountKey, "The total number of tasks on this instance")
 	registerPromMetric(TeamCountKey, "The total number of teams on this instance")
 	registerPromMetric(FilesCountKey, "The total number of files on this instance")
+	registerPromMetric(AttachmentsCountKey, "The total number of attachments on this instance")
 
 	setupActiveUsersMetric()
 	setupActiveLinkSharesMetric()

pkg/models/listeners.go

@@ -37,12 +37,16 @@ import (
 
 // RegisterListeners registers all event listeners
 func RegisterListeners() {
-	events.RegisterListener((&ProjectCreatedEvent{}).Name(), &IncreaseProjectCounter{})
+	if config.MetricsEnabled.GetBool() {
-	events.RegisterListener((&ProjectDeletedEvent{}).Name(), &DecreaseProjectCounter{})
+		events.RegisterListener((&ProjectCreatedEvent{}).Name(), &IncreaseProjectCounter{})
-	events.RegisterListener((&TaskCreatedEvent{}).Name(), &IncreaseTaskCounter{})
+		events.RegisterListener((&ProjectDeletedEvent{}).Name(), &DecreaseProjectCounter{})
-	events.RegisterListener((&TaskDeletedEvent{}).Name(), &DecreaseTaskCounter{})
+		events.RegisterListener((&TaskCreatedEvent{}).Name(), &IncreaseTaskCounter{})
-	events.RegisterListener((&TeamDeletedEvent{}).Name(), &DecreaseTeamCounter{})
+		events.RegisterListener((&TaskDeletedEvent{}).Name(), &DecreaseTaskCounter{})
-	events.RegisterListener((&TeamCreatedEvent{}).Name(), &IncreaseTeamCounter{})
+		events.RegisterListener((&TeamDeletedEvent{}).Name(), &DecreaseTeamCounter{})
+		events.RegisterListener((&TeamCreatedEvent{}).Name(), &IncreaseTeamCounter{})
+		events.RegisterListener((&TaskAttachmentCreatedEvent{}).Name(), &IncreaseAttachmentCounter{})
+		events.RegisterListener((&TaskAttachmentDeletedEvent{}).Name(), &DecreaseAttachmentCounter{})
+	}
 	events.RegisterListener((&TaskCommentCreatedEvent{}).Name(), &SendTaskCommentNotification{})
 	events.RegisterListener((&TaskAssigneeCreatedEvent{}).Name(), &SendTaskAssignedNotification{})
 	events.RegisterListener((&TaskDeletedEvent{}).Name(), &SendTaskDeletedNotification{})
@@ -558,6 +562,34 @@ func (l *AddTaskToTypesense) Handle(msg *message.Message) (err error) {
 	return
 }
 
+// IncreaseAttachmentCounter  represents a listener
+type IncreaseAttachmentCounter struct {
+}
+
+// Name defines the name for the IncreaseAttachmentCounter listener
+func (s *IncreaseAttachmentCounter) Name() string {
+	return "increase.attachment.counter"
+}
+
+// Handle is executed when the event IncreaseAttachmentCounter listens on is fired
+func (s *IncreaseAttachmentCounter) Handle(msg *message.Message) (err error) {
+	return keyvalue.IncrBy(metrics.AttachmentsCountKey, 1)
+}
+
+// DecreaseAttachmentCounter  represents a listener
+type DecreaseAttachmentCounter struct {
+}
+
+// Name defines the name for the DecreaseAttachmentCounter listener
+func (s *DecreaseAttachmentCounter) Name() string {
+	return "decrease.attachment.counter"
+}
+
+// Handle is executed when the event DecreaseAttachmentCounter listens on is fired
+func (s *DecreaseAttachmentCounter) Handle(msg *message.Message) (err error) {
+	return keyvalue.DecrBy(metrics.AttachmentsCountKey, 1)
+}
+
 ///////
 // Project Event Listeners
 

pkg/routes/metrics.go

@@ -64,6 +64,10 @@ func setupMetrics(a *echo.Group) {
 			metrics.FilesCountKey,
 			files.File{},
 		},
+		{
+			metrics.AttachmentsCountKey,
+			models.TaskAttachment{},
+		},
 	} {
 		// Set initial totals
 		total, err := models.GetTotalCount(c.Type)