feat(alerting): lots of progress on notifications, refactored them out to their own package, restored webhook notitication and added slack notification

pkg/services/alerting/notifiers/webhook.go

@@ -0,0 +1,61 @@
+package notifiers
+
+import (
+	"github.com/grafana/grafana/pkg/bus"
+	"github.com/grafana/grafana/pkg/components/simplejson"
+	"github.com/grafana/grafana/pkg/log"
+	m "github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/services/alerting"
+)
+
+func init() {
+	alerting.RegisterNotifier("webhook", NewWebHookNotifier)
+}
+
+func NewWebHookNotifier(model *m.AlertNotification) (alerting.Notifier, error) {
+	url := model.Settings.Get("url").MustString()
+	if url == "" {
+		return nil, alerting.AlertValidationError{Reason: "Could not find url property in settings"}
+	}
+
+	return &WebhookNotifier{
+		NotifierBase: NotifierBase{
+			Name: model.Name,
+			Type: model.Type,
+		},
+		Url:      url,
+		User:     model.Settings.Get("user").MustString(),
+		Password: model.Settings.Get("password").MustString(),
+		log:      log.New("alerting.notifier.webhook"),
+	}, nil
+}
+
+type WebhookNotifier struct {
+	NotifierBase
+	Url      string
+	User     string
+	Password string
+	log      log.Logger
+}
+
+func (this *WebhookNotifier) Notify(context *alerting.AlertResultContext) {
+	this.log.Info("Sending webhook")
+
+	bodyJSON := simplejson.New()
+	bodyJSON.Set("name", context.Rule.Name)
+	bodyJSON.Set("firing", context.Firing)
+	bodyJSON.Set("severity", context.Rule.Severity)
+
+	body, _ := bodyJSON.MarshalJSON()
+
+	cmd := &m.SendWebhook{
+		Url:      this.Url,
+		User:     this.User,
+		Password: this.Password,
+		Body:     string(body),
+	}
+
+	if err := bus.Dispatch(cmd); err != nil {
+		this.log.Error("Failed to send webhook", "error", err, "webhook", this.Name)
+	}
+}