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send_email.go
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/
send_email.go
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package actions
import (
"fmt"
"regexp"
"strings"
"github.com/nyaruka/goflow/excellent"
"github.com/nyaruka/goflow/flows"
"github.com/nyaruka/goflow/flows/events"
)
// TypeSendEmail is the type for the send email action
const TypeSendEmail string = "send_email"
// SendEmailAction can be used to send an email to one or more recipients. The subject, body and addresses
// can all contain expressions.
//
// A `email_created` event will be created for each email address.
//
// ```
// {
// "uuid": "8eebd020-1af5-431c-b943-aa670fc74da9",
// "type": "send_email",
// "addresses": ["@contact.urns.email"],
// "subject": "Here is your activation token",
// "body": "Your activation token is @contact.fields.activation_token"
// }
// ```
//
// @action send_email
type SendEmailAction struct {
BaseAction
Addresses []string `json:"addresses" validate:"required,min=1"`
Subject string `json:"subject" validate:"required"`
Body string `json:"body" validate:"required"`
}
// Type returns the type of this action
func (a *SendEmailAction) Type() string { return TypeSendEmail }
// Validate validates our action is valid and has all the assets it needs
func (a *SendEmailAction) Validate(assets flows.SessionAssets) error {
return nil
}
// Execute creates the email events
func (a *SendEmailAction) Execute(run flows.FlowRun, step flows.Step, log flows.EventLog) error {
subject, err := excellent.EvaluateTemplateAsString(run.Environment(), run.Context(), a.Subject, false)
if err != nil {
log.Add(events.NewErrorEvent(err))
}
if subject == "" {
log.Add(events.NewErrorEvent(fmt.Errorf("send_email subject evaluated to empty string, skipping")))
return nil
}
// make sure the subject is single line - replace '\t\n\r\f\v' to ' '
subject = regexp.MustCompile(`\s+`).ReplaceAllString(subject, " ")
body, err := excellent.EvaluateTemplateAsString(run.Environment(), run.Context(), a.Body, false)
if err != nil {
log.Add(events.NewErrorEvent(err))
}
if body == "" {
log.Add(events.NewErrorEvent(fmt.Errorf("send_email body evaluated to empty string, skipping")))
return nil
}
evaluatedAddresses := make([]string, 0)
for _, address := range a.Addresses {
evaluatedAddress, err := excellent.EvaluateTemplateAsString(run.Environment(), run.Context(), address, false)
if err != nil {
log.Add(events.NewErrorEvent(err))
}
if evaluatedAddress == "" {
log.Add(events.NewErrorEvent(fmt.Errorf("send_email address evaluated to empty string, skipping")))
continue
}
// strip mailto prefix if this is an email URN
if strings.HasPrefix(evaluatedAddress, "mailto:") {
evaluatedAddress = evaluatedAddress[7:]
}
evaluatedAddresses = append(evaluatedAddresses, evaluatedAddress)
}
if len(evaluatedAddresses) > 0 {
log.Add(events.NewEmailCreatedEvent(evaluatedAddresses, subject, body))
}
return nil
}