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email.go
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email.go
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package email
import (
"context"
"net/smtp"
"strings"
mailyak "github.com/domodwyer/mailyak/v3"
di "github.com/fluffy-bunny/fluffy-dozm-di"
contracts_email "github.com/fluffy-bunny/fluffycore-rage-identity/pkg/contracts/email"
contracts_localizer "github.com/fluffy-bunny/fluffycore-rage-identity/pkg/contracts/localizer"
fluffycore_utils "github.com/fluffy-bunny/fluffycore/utils"
status "github.com/gogo/status"
i18n "github.com/nicksnyder/go-i18n/v2/i18n"
zerolog "github.com/rs/zerolog"
codes "google.golang.org/grpc/codes"
)
type (
service struct {
config *contracts_email.EmailConfig
localizer contracts_localizer.ILocalizer
emailRenderer contracts_email.IEmailRenderer
}
)
var stemService = (*service)(nil)
func init() {
var _ contracts_email.IEmailService = stemService
}
func (s *service) Ctor(
config *contracts_email.EmailConfig,
emailRenderer contracts_email.IEmailRenderer,
localizer contracts_localizer.ILocalizer) (contracts_email.IEmailService, error) {
return &service{
config: config,
localizer: localizer,
emailRenderer: emailRenderer,
}, nil
}
// scoped email service due to localization
func AddScopedIEmailService(cb di.ContainerBuilder) {
di.AddScoped[contracts_email.IEmailService](cb, stemService.Ctor)
}
func (s *service) validateSendEmailRequest(request *contracts_email.SendEmailRequest) error {
if request == nil {
return status.Error(codes.InvalidArgument, "request is nil")
}
if request.Data == nil {
request.Data = make(map[string]interface{})
}
if fluffycore_utils.IsEmptyOrNil(request.HtmlTemplate) {
return status.Error(codes.InvalidArgument, "HtmlTemplate is empty")
}
if fluffycore_utils.IsEmptyOrNil(request.TextTemplate) {
return status.Error(codes.InvalidArgument, "TextTemplate is empty")
}
if fluffycore_utils.IsEmptyOrNil(request.SubjectId) {
return status.Error(codes.InvalidArgument, "Subject is empty")
}
if fluffycore_utils.IsEmptyOrNil(request.ToEmail) {
return status.Error(codes.InvalidArgument, "ToEmail is empty")
}
return nil
}
func (s *service) SendEmail(ctx context.Context, request *contracts_email.SendEmailRequest) (*contracts_email.SendEmailResponse, error) {
log := zerolog.Ctx(ctx).With().
Str("method", "SendEmail").
Interface("request", request).
Logger()
err := s.validateSendEmailRequest(request)
if err != nil {
return nil, err
}
localizer := s.localizer.GetLocalizer()
subject, err := localizer.LocalizeMessage(&i18n.Message{ID: request.SubjectId})
if err != nil {
log.Error().Err(err).Msg("failed to localize subject")
return nil, err
}
request.Data["LocalizeMessage"] = func(key string) string {
message, _ := localizer.LocalizeMessage(&i18n.Message{ID: key})
return message
}
renderedEmail, err := s.emailRenderer.RenderEmail(ctx,
&contracts_email.RenderEmailRequest{
HtmlTemplate: request.HtmlTemplate,
TextTemplate: request.TextTemplate,
Data: request.Data,
})
if err != nil {
return nil, err
}
if s.config.JustLogIt {
log.Info().Str("to", request.ToEmail).
Str("subject", subject).Msg(renderedEmail.Text)
return &contracts_email.SendEmailResponse{}, nil
}
mail := mailyak.New(
s.config.Host,
smtp.PlainAuth(
s.config.Auth.PlainAuth.Identity,
s.config.Auth.PlainAuth.Username,
s.config.Auth.PlainAuth.Password,
s.config.Auth.PlainAuth.Host))
mail.To(request.ToEmail)
mail.FromName(s.config.FromName)
mail.From(s.config.FromEmail)
mail.Subject(subject)
mail.Plain().Set(string(renderedEmail.Text))
mail.HTML().Set(string(renderedEmail.Html))
err = mail.Send()
if err != nil {
log.Error().Err(err).Msg("failed to send email")
return nil, err
}
return &contracts_email.SendEmailResponse{}, nil
}
func (s *service) validateSendSimpleEmailRequest(request *contracts_email.SendSimpleEmailRequest) error {
if request == nil {
return status.Error(codes.InvalidArgument, "request is nil")
}
if fluffycore_utils.IsEmptyOrNil(request.BodyId) {
return status.Error(codes.InvalidArgument, "BodyId is empty")
}
if fluffycore_utils.IsEmptyOrNil(request.SubjectId) {
return status.Error(codes.InvalidArgument, "Subject is empty")
}
if fluffycore_utils.IsEmptyOrNil(request.ToEmail) {
return status.Error(codes.InvalidArgument, "ToEmail is empty")
}
return nil
}
func (s *service) SendSimpleEmail(ctx context.Context, request *contracts_email.SendSimpleEmailRequest) (*contracts_email.SendSimpleEmailResponse, error) {
log := zerolog.Ctx(ctx).With().Logger()
err := s.validateSendSimpleEmailRequest(request)
if err != nil {
return nil, err
}
localizer := s.localizer.GetLocalizer()
message, err := localizer.LocalizeMessage(&i18n.Message{ID: request.BodyId})
if err != nil {
log.Error().Err(err).Msg("failed to localize message")
return nil, err
}
for key, value := range request.Data {
message = strings.ReplaceAll(message, "{"+key+"}", value)
}
_, err = s.SendEmail(ctx, &contracts_email.SendEmailRequest{
ToEmail: request.ToEmail,
SubjectId: request.SubjectId,
HtmlTemplate: "emails/generic/index",
TextTemplate: "emails/generic/txt",
Data: map[string]interface{}{"body": message},
})
if err != nil {
return nil, err
}
return &contracts_email.SendSimpleEmailResponse{}, nil
}