create db/lnd/email packages

2023-02-18 14:14:57 +00:00 · 2023-02-18 14:14:57 +00:00 · 9545e5bd4e
commit 9545e5bd4e
parent 6153edd0c3
12 changed files with 255 additions and 736 deletions
--- a/email/email.go
+++ b/email/email.go
@ -0,0 +1,154 @@
+package email
+
+import (
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/ses"
+	log "github.com/sirupsen/logrus"
+	"strconv"
+	"strings"
+	"github.com/boltcard/boltcard/db"
+)
+
+func Send_balance_email(recipient_email string, card_id int) {
+
+	c, err := db.Get_card_from_card_id(card_id)
+	if err != nil {
+		log.Warn(err.Error())
+		return
+	}
+
+	card_total_sats, err := db.Get_card_total_sats(card_id)
+	if err != nil {
+		log.Warn(err.Error())
+		return
+	}
+
+	email_max_txs, err := strconv.Atoi(db.Get_setting("EMAIL_MAX_TXS"))
+	if err != nil {
+		log.Warn(err.Error())
+		return
+	}
+
+	txs, err := db.Get_card_txs(card_id, email_max_txs+1)
+	if err != nil {
+		log.Warn(err.Error())
+		return
+	}
+
+	subject := c.Card_name + " balance = " + strconv.Itoa(card_total_sats) + " sats"
+
+	// add transactions to the email body
+
+	var html_body_sb strings.Builder
+	var text_body_sb strings.Builder
+
+	html_body_sb.WriteString("<!DOCTYPE html><html><head><style> table, " +
+		"th, td { border: 1px solid black; border-collapse: collapse; } " +
+		"</style></head><body>")
+
+	html_body_sb.WriteString("<h3>transactions</h3><table><tr><th>date</th><th>action</th><th>amount</th>")
+	text_body_sb.WriteString("transactions\n\n")
+
+	for i, tx := range txs {
+
+		if i < email_max_txs {
+			html_body_sb.WriteString(
+				"<tr>" +
+					"<td>" + tx.Tx_time + "</td>" +
+					"<td>" + tx.Tx_type + "</td>" +
+					"<td style='text-align:right'>" + strconv.Itoa(tx.Tx_amount_msats/1000) + "</td>" +
+					"</tr>")
+		} else {
+			html_body_sb.WriteString(
+				"<tr>" +
+					"<td style='text-align:center'> ... </td>" +
+					"<td style='text-align:center'> ... </td>" +
+					"<td style='text-align:center'> ... </td>" +
+					"</tr>")
+		}
+
+		text_body_sb.WriteString(tx.Tx_type +
+			" " + strconv.Itoa(tx.Tx_amount_msats/1000))
+	}
+
+	html_body_sb.WriteString("</table></body></html>")
+
+	html_body := html_body_sb.String()
+	text_body := text_body_sb.String()
+
+	Send_email(recipient_email,
+		subject,
+		html_body,
+		text_body)
+}
+
+// https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/ses-example-send-email.html
+
+func Send_email(recipient string, subject string, htmlBody string, textBody string) {
+
+	aws_ses_id := db.Get_setting("AWS_SES_ID")
+	aws_ses_secret := db.Get_setting("AWS_SES_SECRET")
+	sender := db.Get_setting("AWS_SES_EMAIL_FROM")
+
+	sess, err := session.NewSession(&aws.Config{
+		Region:      aws.String("us-east-1"),
+		Credentials: credentials.NewStaticCredentials(aws_ses_id, aws_ses_secret, ""),
+	})
+
+	svc := ses.New(sess)
+
+	charSet := "UTF-8"
+
+	input := &ses.SendEmailInput{
+		Destination: &ses.Destination{
+			CcAddresses: []*string{},
+			ToAddresses: []*string{
+				aws.String(recipient),
+			},
+		},
+		Message: &ses.Message{
+			Body: &ses.Body{
+				Html: &ses.Content{
+					Charset: aws.String(charSet),
+					Data:    aws.String(htmlBody),
+				},
+				Text: &ses.Content{
+					Charset: aws.String(charSet),
+					Data:    aws.String(textBody),
+				},
+			},
+			Subject: &ses.Content{
+				Charset: aws.String(charSet),
+				Data:    aws.String(subject),
+			},
+		},
+		Source: aws.String(sender),
+		//ConfigurationSetName: aws.String(ConfigurationSet),
+	}
+
+	result, err := svc.SendEmail(input)
+
+	if err != nil {
+		if aerr, ok := err.(awserr.Error); ok {
+			switch aerr.Code() {
+			case ses.ErrCodeMessageRejected:
+				log.Warn(ses.ErrCodeMessageRejected, aerr.Error())
+			case ses.ErrCodeMailFromDomainNotVerifiedException:
+				log.Warn(ses.ErrCodeMailFromDomainNotVerifiedException, aerr.Error())
+			case ses.ErrCodeConfigurationSetDoesNotExistException:
+				log.Warn(ses.ErrCodeConfigurationSetDoesNotExistException, aerr.Error())
+			default:
+				log.Warn(aerr.Error())
+			}
+		} else {
+			log.Warn(err.Error())
+		}
+
+		return
+	}
+
+	log.WithFields(log.Fields{"result": result}).Info("email sent")
+}