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Merge pull request #40 from chanioxaris/feature/sendgrid
feat(service): Add SendGrid service
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package sendgrid | ||
|
|
||
| import ( | ||
| "net/http" | ||
|
|
||
| "github.com/pkg/errors" | ||
|
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| "github.com/sendgrid/sendgrid-go" | ||
| "github.com/sendgrid/sendgrid-go/helpers/mail" | ||
| ) | ||
|
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| // SendGrid struct holds necessary data to communicate with the SendGrid API. | ||
| type SendGrid struct { | ||
| client *sendgrid.Client | ||
| senderAddress string | ||
| senderName string | ||
| receiverAddresses []string | ||
| } | ||
|
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| // New returns a new instance of a SendGrid notification service. | ||
| // You will need a SendGrid API key. | ||
| // See https://sendgrid.com/docs/for-developers/sending-email/api-getting-started/ | ||
| func New(apiKey, senderAddress, senderName string) *SendGrid { | ||
| return &SendGrid{ | ||
| client: sendgrid.NewSendClient(apiKey), | ||
| senderAddress: senderAddress, | ||
| senderName: senderName, | ||
| receiverAddresses: []string{}, | ||
| } | ||
| } | ||
|
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| // AddReceivers takes email addresses and adds them to the internal address list. The Send method will send | ||
| // a given message to all those addresses. | ||
| func (s *SendGrid) AddReceivers(addresses ...string) { | ||
| s.receiverAddresses = append(s.receiverAddresses, addresses...) | ||
| } | ||
|
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| // Send takes a message subject and a message body and sends them to all previously set chats. Message body supports | ||
| // html as markup language. | ||
| func (s SendGrid) Send(subject, message string) error { | ||
| from := mail.NewEmail(s.senderName, s.senderAddress) | ||
| content := mail.NewContent("text/html", message) | ||
|
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| // Create a new personalization instance to be able to add multiple receiver addresses. | ||
| personalization := mail.NewPersonalization() | ||
| personalization.Subject = subject | ||
|
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| for _, receiverAddress := range s.receiverAddresses { | ||
| personalization.AddTos(mail.NewEmail(receiverAddress, receiverAddress)) | ||
| } | ||
|
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| mailMessage := mail.NewV3Mail() | ||
| mailMessage.AddPersonalizations(personalization) | ||
| mailMessage.AddContent(content) | ||
| mailMessage.SetFrom(from) | ||
|
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| resp, err := s.client.Send(mailMessage) | ||
| if err != nil { | ||
| return errors.Wrap(err, "failed to send mail using SendGrid service") | ||
| } | ||
|
|
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| if resp.StatusCode != http.StatusAccepted { | ||
| return errors.New("the SendGrid endpoint did not accept the message") | ||
| } | ||
|
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| return nil | ||
| } |