From a0253ec239d7b6d41b813a0e519b2068fd190a48 Mon Sep 17 00:00:00 2001
From: alex <alex@roese.dev>
Date: Sun, 8 Jan 2023 21:21:01 +0100
Subject: [PATCH] implemented gorabbitmqclient

---
 go.mod                       |  1 +
 go.sum                       |  4 ++
 modules/rabbitmq/helper.go   | 88 ++++++++++++++++++++++++++++++++++++
 modules/rabbitmq/rabbitmq.go | 39 ++++++++++------
 4 files changed, 119 insertions(+), 13 deletions(-)
 create mode 100644 modules/rabbitmq/helper.go

diff --git a/go.mod b/go.mod
index 9c2c128..20e1345 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module clickandjoin.app/emailserver
 go 1.19
 
 require (
+	git.clickandjoin.umbach.dev/ClickandJoin/go-rabbitmq-client v1.0.24 // indirect
 	github.com/rabbitmq/amqp091-go v1.5.0 // indirect
 	github.com/sirupsen/logrus v1.9.0 // indirect
 	github.com/tdewolff/minify/v2 v2.12.4 // indirect
diff --git a/go.sum b/go.sum
index 79f27c7..f3786ad 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,7 @@
+git.clickandjoin.umbach.dev/ClickandJoin/go-rabbitmq-client v1.0.23 h1:FYMFWE9gXAXtvLzyVmv9yp/AmQos1OfTuVZy6DnQrEw=
+git.clickandjoin.umbach.dev/ClickandJoin/go-rabbitmq-client v1.0.23/go.mod h1:KPbHNtFhttE/TtXZcorq6LKpCigkTaF0qzmB2p7nFsg=
+git.clickandjoin.umbach.dev/ClickandJoin/go-rabbitmq-client v1.0.24 h1:rvBwQLc5keM6kkAGL9qNQiOlvT5GDfgnYDn3viHVDR8=
+git.clickandjoin.umbach.dev/ClickandJoin/go-rabbitmq-client v1.0.24/go.mod h1:KPbHNtFhttE/TtXZcorq6LKpCigkTaF0qzmB2p7nFsg=
 github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927/go.mod h1:h/aW8ynjgkuj+NQRlZcDbAbM1ORAbXjXX77sX7T289U=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
diff --git a/modules/rabbitmq/helper.go b/modules/rabbitmq/helper.go
new file mode 100644
index 0000000..018cba1
--- /dev/null
+++ b/modules/rabbitmq/helper.go
@@ -0,0 +1,88 @@
+package rabbitmq
+
+import (
+	"encoding/json"
+	"strings"
+
+	"clickandjoin.app/emailserver/mailer"
+	"clickandjoin.app/emailserver/modules/structs"
+	gorabbitmqclient "git.clickandjoin.umbach.dev/ClickandJoin/go-rabbitmq-client"
+	amqp "github.com/rabbitmq/amqp091-go"
+	"github.com/sirupsen/logrus"
+)
+
+func MailMessagesHandling() {
+	msgs, err := mailMessagesConsumer()
+
+	if err != nil {
+		logrus.Errorln("Failed to create ws client queue and binding consumer, err:", err)
+		return
+	}
+
+	channelClosedChannel := make(chan *amqp.Error, 1)
+	MailsClient.Channel.NotifyClose(channelClosedChannel)
+
+	for {
+		select {
+		case <-channelClosedChannel:
+			// This case handles the event of closed channel e.g. abnormal shutdown
+			msgs, err = mailMessagesConsumer()
+
+			if err != nil {
+				// If the AMQP channel is not ready, it will continue the loop. Next
+				// iteration will enter this case because chClosedCh is closed by the
+				// library
+				continue
+			}
+
+			logrus.Debugln("Re-set api broadcast channel")
+
+			// Re-set channel to receive notifications
+			// The library closes this channel after abnormal shutdown
+			channelClosedChannel = make(chan *amqp.Error, 1)
+			MailsClient.Channel.NotifyClose(channelClosedChannel)
+
+		case msg := <-msgs:
+			logrus.Debugln("RECV MAIL")
+
+			mailMessage := structs.RabbitMqMailMessage{}
+
+			if err := json.Unmarshal(msg.Body, &mailMessage); err != nil {
+				logrus.Errorln("Failed to unmarshal json message, err:", err)
+				continue
+			}
+
+			logrus.Println(mailMessage.UserMail)
+
+			// only for testing
+			if !strings.HasSuffix(mailMessage.UserMail, "@roese.dev") && !strings.HasSuffix(mailMessage.UserMail, "@umbach.dev") {
+				mailMessage.UserMail = "info@clickandjoin.de"
+			}
+
+			err = mailer.NewMail(structs.Mail{
+				To:         []string{mailMessage.UserMail},
+				TemplateId: mailMessage.TemplateId,
+				LanguageId: mailMessage.LanguageId,
+				BodyData:   mailMessage.BodyData})
+
+			if err != nil {
+				logrus.Errorln("Failed to send new mail, err:", err)
+				continue
+			}
+
+			msg.Ack(false)
+		}
+	}
+}
+
+func mailMessagesConsumer() (msgs <-chan amqp.Delivery, err error) {
+	return MailsClient.ConsumeChannelMessages(gorabbitmqclient.ChannelConsumeSettings{
+		QueueName: queueMails,
+		Consumer:  "",
+		AutoAck:   false,
+		Exclusive: false,
+		NoLocal:   false,
+		NoWait:    false,
+		Arguments: nil,
+	})
+}
diff --git a/modules/rabbitmq/rabbitmq.go b/modules/rabbitmq/rabbitmq.go
index 5660534..5e5d124 100644
--- a/modules/rabbitmq/rabbitmq.go
+++ b/modules/rabbitmq/rabbitmq.go
@@ -1,28 +1,40 @@
 package rabbitmq
 
 import (
-	"encoding/json"
-	"fmt"
-	"strings"
+	"time"
 
-	"clickandjoin.app/emailserver/mailer"
 	"clickandjoin.app/emailserver/modules/config"
-	"clickandjoin.app/emailserver/modules/structs"
-	amqp "github.com/rabbitmq/amqp091-go"
-	"github.com/sirupsen/logrus"
+	gorabbitmqclient "git.clickandjoin.umbach.dev/ClickandJoin/go-rabbitmq-client"
 )
 
-var Conn *amqp.Connection
-var Channel *amqp.Channel
-
 const queueMails = "cnj.mails"
 
-func getConnectionString() string {
-	cfg := &config.Cfg.RabbitMq
+var MailsClient *gorabbitmqclient.Client
 
-	return fmt.Sprintf("amqp://%s:%s@%s/", cfg.Username, cfg.Password, cfg.Host)
+func Init() {
+	cfg := config.Cfg
+
+	MailsClient = gorabbitmqclient.NewClient(
+		cfg.Debug,
+		gorabbitmqclient.ExchangeSettings{},
+		gorabbitmqclient.QueueSettings{},
+		gorabbitmqclient.ChannelQosSettingsDefault,
+		gorabbitmqclient.Config{
+			ReconnectDelay: 1 * time.Second,
+			ReInitDelay:    1 * time.Second,
+			ResendDelay:    5 * time.Second,
+		},
+		gorabbitmqclient.GetConnectionString(
+			cfg.RabbitMq.Username,
+			cfg.RabbitMq.Password,
+			cfg.RabbitMq.Host))
+
+	<-time.After(time.Second)
+
+	MailMessagesHandling()
 }
 
+/*
 func Init() {
 	conn, err := amqp.Dial(getConnectionString())
 
@@ -99,3 +111,4 @@ func Init() {
 
 	<-forever
 }
+*/