feat(alerting): working on image rendering with alert notifications

pkg/services/alerting/interfaces.go

@@ -14,6 +14,7 @@ type Scheduler interface {
 type Notifier interface {
 	Notify(alertResult *EvalContext)
 	GetType() string
+	NeedsImage() bool
 }
 
 type Condition interface {

pkg/services/alerting/notifier.go

@@ -22,6 +22,10 @@ func (n *RootNotifier) GetType() string {
 	return "root"
 }
 
+func (n *RootNotifier) NeedsImage() bool {
+	return false
+}
+
 func (n *RootNotifier) Notify(context *EvalContext) {
 	n.log.Info("Sending notifications for", "ruleId", context.Rule.Id)
 

pkg/services/alerting/notifiers/base.go

@@ -8,3 +8,7 @@ type NotifierBase struct {
 func (n *NotifierBase) GetType() string {
 	return n.Type
 }
+
+func (n *NotifierBase) NeedsImage() bool {
+	return true
+}