add mail service

mail-service/cmd/api/handlers.go

@@ -0,0 +1,81 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"log"
+	"net/http"
+	"time"
+
+	"github.com/tsawler/toolbox"
+	mail "github.com/xhit/go-simple-mail/v2"
+)
+
+type MailData struct {
+	From    string
+	To      string
+	Subject string
+	Content string
+}
+
+func (app *Config) SendMail(w http.ResponseWriter, r *http.Request) {
+	var mailData MailData
+	err := json.NewDecoder(r.Body).Decode(&mailData)
+	if err != nil {
+		log.Println(err)
+		app.Tools.ErrorJSON(w, err)
+	}
+
+	if mailData.From == "" || mailData.To == "" ||
+		(mailData.Subject == "" && mailData.Content == "") {
+		log.Println("Invalid mail")
+		app.Tools.ErrorJSON(w, errors.New("invalid mail"), http.StatusBadRequest)
+	}
+
+	err = app.SendMsg(mailData)
+	if err != nil {
+		log.Println(err)
+		app.Tools.ErrorJSON(w, err)
+	}
+
+	var payload toolbox.JSONResponse
+	payload.Error = false
+	payload.Message = fmt.Sprintf("mail sent to %s", mailData.To)
+
+	app.Tools.WriteJSON(w, http.StatusOK, payload)
+}
+
+func (app *Config) SendMsg(m MailData) error {
+	server := mail.NewSMTPClient()
+	server.Host = app.Host
+	server.Port = app.Port
+
+	server.KeepAlive = false
+	server.ConnectTimeout = 10 * time.Second
+	server.SendTimeout = 10 * time.Second
+
+	smtpClient, err := server.Connect()
+	if err != nil {
+		log.Println(err)
+		return err
+	}
+
+	// Maybe add a template
+
+	email := mail.NewMSG()
+	email.SetFrom(m.From).
+		AddTo(m.To).
+		SetSubject(m.Subject).
+		SetBody(mail.TextHTML, m.Content)
+
+	err = email.Send(smtpClient)
+	if err != nil {
+		log.Println(err)
+		return err
+	}
+
+	log.Printf("Email sent to %s", m.To)
+
+	return nil
+}

mail-service/cmd/api/main.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/tsawler/toolbox"
+)
+
+const webPort = "80"
+
+type Config struct {
+	Host       string
+	Port       int
+	UserName   string
+	Password   string
+	Encryption string
+	Tools      toolbox.Tools
+}
+
+func main() {
+	app := Config{
+		Host: "localhost",
+		Port: 1025,
+	}
+
+	log.Printf("Starting mail service on port %s\n", webPort)
+
+	// define http server
+	srv := &http.Server{
+		Addr:    fmt.Sprintf(":%s", webPort),
+		Handler: app.routes(),
+	}
+
+	err := srv.ListenAndServe()
+	if err != nil {
+		log.Panic(err)
+	}
+}

mail-service/cmd/api/routes.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+	"github.com/go-chi/cors"
+)
+
+func (app *Config) routes() http.Handler {
+	mux := chi.NewRouter()
+
+	mux.Use(cors.Handler(cors.Options{
+		AllowedOrigins:   []string{"https://*", "http://*"},
+		AllowedMethods:   []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
+		AllowedHeaders:   []string{"Accept", "Authorization", "Content-Type", "X-CSRF-Token"},
+		ExposedHeaders:   []string{"Link"},
+		AllowCredentials: true,
+		MaxAge:           300,
+	}))
+
+	mux.Use(middleware.Heartbeat("/ping"))
+
+	mux.Post("/send-mail", app.SendMail)
+	return nil
+}

mail-service/go.mod

@@ -0,0 +1,16 @@
+module mail
+
+go 1.22.5
+
+require (
+	github.com/go-chi/chi/v5 v5.1.0
+	github.com/go-chi/cors v1.2.1
+	github.com/tsawler/toolbox v1.3.1
+	github.com/xhit/go-simple-mail/v2 v2.16.0
+)
+
+require (
+	github.com/go-test/deep v1.1.1 // indirect
+	github.com/stretchr/testify v1.9.0 // indirect
+	github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208 // indirect
+)

mail-service/go.sum

@@ -0,0 +1,20 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-chi/chi/v5 v5.1.0 h1:acVI1TYaD+hhedDJ3r54HyA6sExp3HfXq7QWEEY/xMw=
+github.com/go-chi/chi/v5 v5.1.0/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
+github.com/go-chi/cors v1.2.1 h1:xEC8UT3Rlp2QuWNEr4Fs/c2EAGVKBwy/1vHx3bppil4=
+github.com/go-chi/cors v1.2.1/go.mod h1:sSbTewc+6wYHBBCW7ytsFSn836hqM7JxpglAy2Vzc58=
+github.com/go-test/deep v1.1.1 h1:0r/53hagsehfO4bzD2Pgr/+RgHqhmf+k1Bpse2cTu1U=
+github.com/go-test/deep v1.1.1/go.mod h1:5C2ZWiW0ErCdrYzpqxLbTX7MG14M9iiw8DgHncVwcsE=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208 h1:PM5hJF7HVfNWmCjMdEfbuOBNXSVF2cMFGgQTPdKCbwM=
+github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208/go.mod h1:BzWtXXrXzZUvMacR0oF/fbDDgUPO8L36tDMmRAf14ns=
+github.com/tsawler/toolbox v1.3.1 h1:zqnt5L5dmWiBrs2JgE1VeHJJO/IMStFKQgWxc+eriEE=
+github.com/tsawler/toolbox v1.3.1/go.mod h1:bYUEtJ09HFx534XcjXdTIzv7MCKsg9SrhSGELFe6HI4=
+github.com/xhit/go-simple-mail/v2 v2.16.0 h1:ouGy/Ww4kuaqu2E2UrDw7SvLaziWTB60ICLkIkNVccA=
+github.com/xhit/go-simple-mail/v2 v2.16.0/go.mod h1:b7P5ygho6SYE+VIqpxA6QkYfv4teeyG4MKqB3utRu98=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

mail-service/mail-service.dockerfile

@@ -0,0 +1,8 @@
+FROM alpine:latest
+
+RUN mkdir /app
+
+COPY mailApp /app
+
+CMD ["/app/mailApp"]
+

project/Makefile

@@ -2,6 +2,7 @@ FRONT_END_BINARY=frontApp
 BROKER_BINARY=brokerApp
 AUTH_BINARY=authApp
 LOGGER_BINARY=loggerApp
+MAIL_BINARY=mailApp
 
 ## up: starts all containers in the background without forcing build
 up:
@@ -10,7 +11,7 @@ up:
 	@echo "Docker images started!"
 
 ## up_build: stops docker-compose (if running), builds all projects and starts docker compose
-up_build: build_broker build_auth build_logger
+up_build: build_broker build_auth build_logger build_mail
 	@echo "Stopping docker images (if running...)"
 	docker compose down
 	@echo "Building (when required) and starting docker images..."
@@ -41,6 +42,12 @@ build_logger:
 	cd ../logger-service && env GOOS=linux CGO_ENABLED=0 go build -o ${LOGGER_BINARY} ./cmd/api
 	@echo "Done!"
 
+## build_mail: builds the mail binary as a linux executable
+build_mail:
+	@echo "Building mail binary..."
+	cd ../mail-service && env GOOS=linux CGO_ENABLED=0 go build -o ${MAIL_BINARY} ./cmd/api
+	@echo "Done!"
+
 ## build_front: builds the frone end binary
 build_front:
 	@echo "Building front end binary..."

project/docker-compose.yml

@@ -31,6 +31,15 @@ services:
       mode: replicated
       replicas: 1
 
+  mail-service:
+    build:
+      context: ./../mail-service/
+      dockerfile: ./../mail-service/mail-service.dockerfile
+    restart: always
+    deploy:
+      mode: replicated
+      replicas: 1
+
   postgres:
     image: postgres:16.4-alpine
     ports: