satellite/analytics: track origin header and referer on signup

This allows us to distinguish between accounts created from the signup
page vs. from www.storj.io.
Also set a field `account_created=true` when we send so
that we can see when existing leads have created an account.

Change-Id: Ibef34825a08b6c68b8f2869625e576bb837520e5

satellite/analytics/hubspot.go

@@ -105,10 +105,13 @@ func (q *HubSpotEvents) EnqueueCreateUser(fields TrackCreateUserFields) {
 		Data: map[string]interface{}{
 			"email": fields.Email,
 			"properties": map[string]interface{}{
-				"email":          fields.Email,
-				"firstname":      firstName,
-				"lastname":       lastName,
-				"lifecyclestage": "customer",
+				"email":           fields.Email,
+				"firstname":       firstName,
+				"lastname":        lastName,
+				"lifecyclestage":  "customer",
+				"origin_header":   fields.OriginHeader,
+				"signup_referrer": fields.Referrer,
+				"account_created": true,
 			},
 		},
 	}

satellite/analytics/service.go

@@ -107,6 +107,8 @@ type TrackCreateUserFields struct {
 	CompanyName      string
 	JobTitle         string
 	HaveSalesContact bool
+	OriginHeader     string
+	Referrer         string
 }
 
 func (service *Service) enqueueMessage(message segment.Message) {
@@ -137,6 +139,9 @@ func (service *Service) TrackCreateUser(fields TrackCreateUserFields) {
 	props.Set("name", fields.FullName)
 	props.Set("satellite_selected", service.satelliteName)
 	props.Set("account_type", fields.Type)
+	props.Set("origin_header", fields.OriginHeader)
+	props.Set("signup_referrer", fields.Referrer)
+	props.Set("account_created", true)
 
 	if fields.Type == Professional {
 		props.Set("company_size", fields.EmployeeCount)

satellite/console/consoleweb/consoleapi/auth.go

@@ -258,12 +258,19 @@ func (a *Auth) Register(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 
+		// see if referrer was provided in URL query, otherwise use the Referer header in the request.
+		referrer := r.URL.Query().Get("referrer")
+		if referrer == "" {
+			referrer = r.Referer()
+		}
 		trackCreateUserFields := analytics.TrackCreateUserFields{
-			ID:          user.ID,
-			AnonymousID: loadSession(r),
-			FullName:    user.FullName,
-			Email:       user.Email,
-			Type:        analytics.Personal,
+			ID:           user.ID,
+			AnonymousID:  loadSession(r),
+			FullName:     user.FullName,
+			Email:        user.Email,
+			Type:         analytics.Personal,
+			OriginHeader: origin,
+			Referrer:     referrer,
 		}
 		if user.IsProfessional {
 			trackCreateUserFields.Type = analytics.Professional