Adding webhook metrics (#5348)

app/webhook.go

@@ -12,6 +12,7 @@ import (
 	"strings"
 
 	l4g "github.com/alecthomas/log4go"
+	"github.com/mattermost/platform/einterfaces"
 	"github.com/mattermost/platform/model"
 	"github.com/mattermost/platform/utils"
 )
@@ -126,6 +127,10 @@ func CreateWebhookPost(userId, teamId, channelId, text, overrideUsername, overri
 	post := &model.Post{UserId: userId, ChannelId: channelId, Message: text, Type: postType}
 	post.AddProp("from_webhook", "true")
 
+	if metrics := einterfaces.GetMetricsInterface(); metrics != nil {
+		metrics.IncrementWebhookPost()
+	}
+
 	if utils.Cfg.ServiceSettings.EnablePostUsernameOverride {
 		if len(overrideUsername) != 0 {
 			post.AddProp("override_username", overrideUsername)

einterfaces/metrics.go

@@ -8,6 +8,7 @@ type MetricsInterface interface {
 	StopServer()
 
 	IncrementPostCreate()
+	IncrementWebhookPost()
 	IncrementPostSentEmail()
 	IncrementPostSentPush()
 	IncrementPostBroadcast()