feat(alerting): add api route for alert changes

pkg/services/sqlstore/alert_rule_changes.go

@@ -0,0 +1,37 @@
+package sqlstore
+
+import (
+	"github.com/go-xorm/xorm"
+	"github.com/grafana/grafana/pkg/bus"
+	m "github.com/grafana/grafana/pkg/models"
+	"time"
+)
+
+func init() {
+	bus.AddHandler("sql", GetAlertRuleChanges)
+}
+
+func GetAlertRuleChanges(query *m.GetAlertChangesQuery) error {
+	alertChanges := make([]m.AlertRuleChange, 0)
+	if err := x.Where("org_id = ?", query.OrgId).Find(&alertChanges); err != nil {
+		return err
+	}
+
+	query.Result = alertChanges
+	return nil
+}
+
+func SaveAlertChange(change string, alert m.AlertRule, sess *xorm.Session) error {
+	_, err := sess.Insert(&m.AlertRuleChange{
+		OrgId:   alert.OrgId,
+		Type:    change,
+		Created: time.Now(),
+		AlertId: alert.Id,
+	})
+
+	if err != nil {
+		return err
+	}
+
+	return nil
+}