[MM-29845] Add CWS Webhook endpoint and payment failed email (#16351)

* Add a new handler to allow authentication via CWS API Key

* Make error better

* Add tests and cases for new handler functions

* Move some code around

* Add test for GetCloudSession function

* unset the env after test completion

* Remove white space

* Add CWS Webhook endpoint and email code

* handle returned errors from email sending function

* Change FailureCode to FailureMessage

* Remove unnecessary translations

* Fix translations

* Forgot to add template

* Update api4/cloud.go

Co-authored-by: Maria A Nunez <maria.nunez@mattermost.com>

* Update api4/cloud.go

Co-authored-by: Maria A Nunez <maria.nunez@mattermost.com>

* Update api4/cloud.go

Co-authored-by: Maria A Nunez <maria.nunez@mattermost.com>

* PR changes

* Update app/email.go

Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>

* Close body in proper spot

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>
Co-authored-by: Maria A Nunez <maria.nunez@mattermost.com>
Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>

app/app_iface.go

@@ -893,6 +893,7 @@ type AppIface interface {
 	SendEphemeralPost(userId string, post *model.Post) *model.Post
 	SendNotifications(post *model.Post, team *model.Team, channel *model.Channel, sender *model.User, parentPostList *model.PostList, setOnline bool) ([]string, error)
 	SendPasswordReset(email string, siteURL string) (bool, *model.AppError)
+	SendPaymentFailedEmail(failedPayment *model.FailedPayment) *model.AppError
 	ServeInterPluginRequest(w http.ResponseWriter, r *http.Request, sourcePluginId, destinationPluginId string)
 	ServePluginRequest(w http.ResponseWriter, r *http.Request)
 	Session() *model.Session

app/cloud.go

@@ -4,9 +4,20 @@
 package app
 
 import (
+	"github.com/mattermost/mattermost-server/v5/mlog"
 	"github.com/mattermost/mattermost-server/v5/model"
 )
 
+func (a *App) getSysAdminsEmailRecipients() ([]*model.User, *model.AppError) {
+	userOptions := &model.UserGetOptions{
+		Page:     0,
+		PerPage:  100,
+		Role:     model.SYSTEM_ADMIN_ROLE_ID,
+		Inactive: false,
+	}
+	return a.GetUsers(userOptions)
+}
+
 func (a *App) CheckAndSendUserLimitWarningEmails() *model.AppError {
 	if a.Srv().License() == nil || (a.Srv().License() != nil && !*a.Srv().License().Features.Cloud) {
 		// Not cloud instance, do nothing
@@ -30,13 +41,7 @@ func (a *App) CheckAndSendUserLimitWarningEmails() *model.AppError {
 	if remainingUsers > 0 {
 		return nil
 	}
-	userOptions := &model.UserGetOptions{
-		Page:     0,
-		PerPage:  100,
-		Role:     model.SYSTEM_ADMIN_ROLE_ID,
-		Inactive: false,
-	}
-	sysAdmins, err := a.GetUsers(userOptions)
+	sysAdmins, err := a.getSysAdminsEmailRecipients()
 	if err != nil {
 		return err
 	}
@@ -55,3 +60,18 @@ func (a *App) CheckAndSendUserLimitWarningEmails() *model.AppError {
 	}
 	return nil
 }
+
+func (a *App) SendPaymentFailedEmail(failedPayment *model.FailedPayment) *model.AppError {
+	sysAdmins, err := a.getSysAdminsEmailRecipients()
+	if err != nil {
+		return err
+	}
+
+	for _, admin := range sysAdmins {
+		_, err := a.Srv().EmailService.SendPaymentFailedEmail(admin.Email, admin.Locale, failedPayment, *a.Config().ServiceSettings.SiteURL)
+		if err != nil {
+			a.Log().Error("Error sending payment failed email", mlog.Err(err))
+		}
+	}
+	return nil
+}

app/email.go

@@ -766,3 +766,25 @@ func (es *EmailService) SendSuspensionEmailToSupport(email string, installationI
 
 	return true, nil
 }
+
+func (es *EmailService) SendPaymentFailedEmail(email string, locale string, failedPayment *model.FailedPayment, siteURL string) (bool, *model.AppError) {
+	T := utils.GetUserTranslations(locale)
+
+	subject := T("api.templates.payment_failed.subject")
+
+	bodyPage := es.newEmailTemplate("payment_failed_body", locale)
+	bodyPage.Props["SiteURL"] = siteURL
+	bodyPage.Props["Title"] = T("api.templates.payment_failed.title")
+	bodyPage.Props["Info1"] = T("api.templates.payment_failed.info1", map[string]interface{}{"CardBrand": failedPayment.CardBrand, "LastFour": failedPayment.LastFour})
+	bodyPage.Props["Info2"] = T("api.templates.payment_failed.info2")
+	bodyPage.Props["Info3"] = T("api.templates.payment_failed.info3")
+	bodyPage.Props["Button"] = T("api.templates.over_limit_fix_now")
+
+	bodyPage.Props["FailedReason"] = failedPayment.FailureMessage
+
+	if err := es.sendMail(email, subject, bodyPage.Render()); err != nil {
+		return false, model.NewAppError("SendPaymentFailedEmail", "api.user.send_password_reset.send.app_error", nil, "err="+err.Message, http.StatusInternalServerError)
+	}
+
+	return true, nil
+}

app/opentracing/opentracing_layer.go

@@ -13088,6 +13088,28 @@ func (a *OpenTracingAppLayer) SendPasswordReset(email string, siteURL string) (b
 	return resultVar0, resultVar1
 }
 
+func (a *OpenTracingAppLayer) SendPaymentFailedEmail(failedPayment *model.FailedPayment) *model.AppError {
+	origCtx := a.ctx
+	span, newCtx := tracing.StartSpanWithParentByContext(a.ctx, "app.SendPaymentFailedEmail")
+
+	a.ctx = newCtx
+	a.app.Srv().Store.SetContext(newCtx)
+	defer func() {
+		a.app.Srv().Store.SetContext(origCtx)
+		a.ctx = origCtx
+	}()
+
+	defer span.Finish()
+	resultVar0 := a.app.SendPaymentFailedEmail(failedPayment)
+
+	if resultVar0 != nil {
+		span.LogFields(spanlog.Error(resultVar0))
+		ext.Error.Set(span, true)
+	}
+
+	return resultVar0
+}
+
 func (a *OpenTracingAppLayer) ServeInterPluginRequest(w http.ResponseWriter, r *http.Request, sourcePluginId string, destinationPluginId string) {
 	origCtx := a.ctx
 	span, newCtx := tracing.StartSpanWithParentByContext(a.ctx, "app.ServeInterPluginRequest")