listmonk/main.go

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package main
import (
"fmt"
"html/template"
"log"
"os"
"path/filepath"
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"strings"
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"time"
_ "github.com/jinzhu/gorm/dialects/postgres"
"github.com/jmoiron/sqlx"
"github.com/knadh/goyesql"
"github.com/knadh/listmonk/manager"
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"github.com/knadh/listmonk/messenger"
"github.com/knadh/listmonk/subimporter"
"github.com/knadh/stuffbin"
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"github.com/labstack/echo"
flag "github.com/spf13/pflag"
"github.com/spf13/viper"
)
type constants struct {
RootURL string `mapstructure:"root"`
LogoURL string `mapstructure:"logo_url"`
FaviconURL string `mapstructure:"favicon_url"`
UploadPath string `mapstructure:"upload_path"`
UploadURI string `mapstructure:"upload_uri"`
FromEmail string `mapstructure:"from_email"`
NotifyEmails []string `mapstructure:"notify_emails"`
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}
// App contains the "global" components that are
// passed around, especially through HTTP handlers.
type App struct {
Constants *constants
DB *sqlx.DB
Queries *Queries
Importer *subimporter.Importer
Manager *manager.Manager
FS stuffbin.FileSystem
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Logger *log.Logger
NotifTpls *template.Template
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Messenger messenger.Messenger
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}
var logger *log.Logger
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func init() {
logger = log.New(os.Stdout, "SYS: ", log.Ldate|log.Ltime|log.Lshortfile)
// Register --help handler.
flagSet := flag.NewFlagSet("config", flag.ContinueOnError)
flagSet.Usage = func() {
fmt.Println(flagSet.FlagUsages())
os.Exit(0)
}
// Setup the default configuration.
viper.SetConfigName("config")
flagSet.StringSlice("config", []string{"config.toml"},
"Path to one or more config files (will be merged in order)")
flagSet.Bool("install", false, "Run first time installation")
flagSet.Bool("version", false, "Current version of the build")
// Process flags.
flagSet.Parse(os.Args[1:])
viper.BindPFlags(flagSet)
// Read the config files.
cfgs := viper.GetStringSlice("config")
for _, c := range cfgs {
logger.Printf("reading config: %s", c)
viper.SetConfigFile(c)
if err := viper.MergeInConfig(); err != nil {
logger.Fatalf("error reading config: %s", err)
}
}
}
// initFileSystem initializes the stuffbin FileSystem to provide
// access to bunded static assets to the app.
func initFileSystem(binPath string) (stuffbin.FileSystem, error) {
fs, err := stuffbin.UnStuff("./listmonk")
if err == nil {
return fs, nil
}
// Running in local mode. Load the required static assets into
// the in-memory stuffbin.FileSystem.
logger.Printf("unable to initialize embedded filesystem: %v", err)
logger.Printf("using local filesystem for static assets")
files := []string{
"config.toml.sample",
"queries.sql",
"schema.sql",
"email-templates",
"public",
// The frontend app's static assets are aliased to /frontend
// so that they are accessible at localhost:port/frontend/static/ ...
"frontend/my/build:/frontend",
}
fs, err = stuffbin.NewLocalFS("/", files...)
if err != nil {
return nil, fmt.Errorf("failed to initialize local file for assets: %v", err)
}
return fs, nil
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}
// initMessengers initializes various messaging backends.
func initMessengers(r *manager.Manager) messenger.Messenger {
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// Load SMTP configurations for the default e-mail Messenger.
var srv []messenger.Server
for name := range viper.GetStringMapString("smtp") {
if !viper.GetBool(fmt.Sprintf("smtp.%s.enabled", name)) {
logger.Printf("skipped SMTP: %s", name)
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continue
}
var s messenger.Server
viper.UnmarshalKey("smtp."+name, &s)
s.Name = name
s.SendTimeout = s.SendTimeout * time.Millisecond
srv = append(srv, s)
logger.Printf("loaded SMTP: %s (%s@%s)", s.Name, s.Username, s.Host)
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}
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msgr, err := messenger.NewEmailer(srv...)
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if err != nil {
logger.Fatalf("error loading e-mail messenger: %v", err)
}
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if err := r.AddMessenger(msgr); err != nil {
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logger.Printf("error registering messenger %s", err)
}
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return msgr
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}
func main() {
// Connect to the DB.
db, err := connectDB(viper.GetString("db.host"),
viper.GetInt("db.port"),
viper.GetString("db.user"),
viper.GetString("db.password"),
viper.GetString("db.database"),
viper.GetString("db.ssl_mode"))
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if err != nil {
logger.Fatalf("error connecting to DB: %v", err)
}
defer db.Close()
var c constants
viper.UnmarshalKey("app", &c)
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c.RootURL = strings.TrimRight(c.RootURL, "/")
c.UploadURI = filepath.Clean(c.UploadURI)
c.UploadPath = filepath.Clean(c.UploadPath)
// Initialize the static file system into which all
// required static assets (.sql, .js files etc.) are loaded.
fs, err := initFileSystem(os.Args[0])
if err != nil {
logger.Fatal(err)
}
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// Initialize the app context that's passed around.
app := &App{
Constants: &c,
DB: db,
Logger: logger,
FS: fs,
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}
// Load SQL queries.
qB, err := fs.Read("/queries.sql")
if err != nil {
logger.Fatalf("error reading queries.sql: %v", err)
}
qMap, err := goyesql.ParseBytes(qB)
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if err != nil {
logger.Fatalf("error parsing SQL queries: %v", err)
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}
// Run the first time installation.
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if viper.GetBool("install") {
install(app, qMap)
return
}
// Map queries to the query container.
q := &Queries{}
if err := scanQueriesToStruct(q, qMap, db.Unsafe()); err != nil {
logger.Fatalf("no SQL queries loaded: %v", err)
}
app.Queries = q
// Initialize the bulk subscriber importer.
importNotifCB := func(subject string, data map[string]interface{}) error {
go sendNotification(notifTplImport, subject, data, app)
return nil
}
app.Importer = subimporter.New(q.UpsertSubscriber.Stmt,
q.UpsertBlacklistSubscriber.Stmt,
q.UpdateListsDate.Stmt,
db.DB,
importNotifCB)
// Read system e-mail templates.
notifTpls, err := stuffbin.ParseTemplatesGlob(fs, "/email-templates/*.html")
if err != nil {
logger.Fatalf("error loading system e-mail templates: %v", err)
}
app.NotifTpls = notifTpls
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// Initialize the campaign manager.
campNotifCB := func(subject string, data map[string]interface{}) error {
return sendNotification(notifTplCampaign, subject, data, app)
}
m := manager.New(manager.Config{
Concurrency: viper.GetInt("app.concurrency"),
MaxSendErrors: viper.GetInt("app.max_send_errors"),
FromEmail: app.Constants.FromEmail,
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// url.com/unsubscribe/{campaign_uuid}/{subscriber_uuid}
UnsubscribeURL: fmt.Sprintf("%s/unsubscribe/%%s/%%s", app.Constants.RootURL),
// url.com/link/{campaign_uuid}/{subscriber_uuid}/{link_uuid}
LinkTrackURL: fmt.Sprintf("%s/link/%%s/%%s/%%s", app.Constants.RootURL),
// url.com/campaign/{campaign_uuid}/{subscriber_uuid}/px.png
ViewTrackURL: fmt.Sprintf("%s/campaign/%%s/%%s/px.png", app.Constants.RootURL),
}, newManagerDB(q), campNotifCB, logger)
app.Manager = m
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// Add messengers.
app.Messenger = initMessengers(app.Manager)
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// Initialize the workers that push out messages.
go m.Run(time.Duration(time.Second * 5))
m.SpawnWorkers()
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// Initialize the HTTP server.
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var srv = echo.New()
srv.HideBanner = true
// Register app (*App) to be injected into all HTTP handlers.
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srv.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
c.Set("app", app)
return next(c)
}
})
// Parse user facing templates.
tpl, err := stuffbin.ParseTemplatesGlob(fs, "/public/templates/*.html")
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if err != nil {
logger.Fatalf("error parsing public templates: %v", err)
}
srv.Renderer = &tplRenderer{
templates: tpl,
RootURL: c.RootURL,
LogoURL: c.LogoURL,
FaviconURL: c.FaviconURL}
// Register HTTP handlers and static file servers.
fSrv := app.FS.FileServer()
srv.GET("/public/*", echo.WrapHandler(fSrv))
srv.GET("/frontend/*", echo.WrapHandler(fSrv))
srv.Static(c.UploadURI, c.UploadURI)
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registerHandlers(srv)
srv.Logger.Fatal(srv.Start(viper.GetString("app.address")))
}