config.go

package courier

import "github.com/nyaruka/ezconf"

// Config is our top level configuration object
type Config struct {
	Backend                   string `help:"the backend that will be used by courier (currently only rapidpro is supported)"`
	SentryDSN                 string `help:"the DSN used for logging errors to Sentry"`
	Domain                    string `help:"the domain courier is exposed on"`
	Address                   string `help:"the network interface address courier will bind to"`
	Port                      int    `help:"the port courier will listen on"`
	DB                        string `help:"URL describing how to connect to the RapidPro database"`
	Redis                     string `help:"URL describing how to connect to Redis"`
	SpoolDir                  string `help:"the local directory where courier will write statuses or msgs that need to be retried (needs to be writable)"`
	S3BucketUrlFormat         string `help:"the url to the s3 bucket we will write attachments to, with one string placeholder for the bucket name"`
	S3Endpoint                string `help:"the S3 endpoint we will write attachments to"`
	S3Region                  string `help:"the S3 region we will write attachments to"`
	S3MediaBucket             string `help:"the S3 bucket we will write attachments to"`
	S3MediaPrefix             string `help:"the prefix that will be added to attachment filenames"`
	S3DisableSSL              bool   `help:"whether we disable SSL when accessing S3. Should always be set to False unless you're hosting an S3 compatible service within a secure internal network"`
	S3ForcePathStyle          bool   `help:"whether we force S3 path style. Should generally need to default to False unless you're hosting an S3 compatible service"`
	AWSAccessKeyID            string `help:"the access key id to use when authenticating S3"`
	AWSSecretAccessKey        string `help:"the secret access key id to use when authenticating S3"`
	FacebookApplicationSecret string `help:"the Facebook app secret"`
	FacebookWebhookSecret     string `help:"the secret for Facebook webhook URL verification"`
	MaxWorkers                int    `help:"the maximum number of go routines that will be used for sending (set to 0 to disable sending)"`
	LibratoUsername           string `help:"the username that will be used to authenticate to Librato"`
	LibratoToken              string `help:"the token that will be used to authenticate to Librato"`
	StatusUsername            string `help:"the username that is needed to authenticate against the /status endpoint"`
	StatusPassword            string `help:"the password that is needed to authenticate against the /status endpoint"`
	LogLevel                  string `help:"the logging level courier should use"`
	Version                   string `help:"the version that will be used in request and response headers"`

	WhatsappAdminSystemUserToken string `help:"the token of the admin system user for WhatsApp"`

	// IncludeChannels is the list of channels to enable, empty means include all
	IncludeChannels []string

	// ExcludeChannels is the list of channels to exclude, empty means exclude none
	ExcludeChannels []string
}

// NewConfig returns a new default configuration object
func NewConfig() *Config {
	return &Config{
		Backend:                      "rapidpro",
		Domain:                       "localhost",
		Address:                      "",
		Port:                         8080,
		DB:                           "postgres://temba:temba@localhost/temba?sslmode=disable",
		Redis:                        "redis://localhost:6379/15",
		SpoolDir:                     "/var/spool/courier",
		S3BucketUrlFormat:            "",
		S3Endpoint:                   "https://s3.amazonaws.com",
		S3Region:                     "us-east-1",
		S3MediaBucket:                "courier-media",
		S3MediaPrefix:                "/media/",
		S3DisableSSL:                 false,
		S3ForcePathStyle:             false,
		AWSAccessKeyID:               "",
		AWSSecretAccessKey:           "",
		FacebookApplicationSecret:    "missing_facebook_app_secret",
		FacebookWebhookSecret:        "missing_facebook_webhook_secret",
		WhatsappAdminSystemUserToken: "missing_whatsapp_admin_system_user_token",
		MaxWorkers:                   32,
		LogLevel:                     "error",
		Version:                      "Dev",
	}
}

// LoadConfig loads our configuration from the passed in filename
func LoadConfig(filename string) *Config {
	config := NewConfig()
	loader := ezconf.NewLoader(
		config,
		"courier", "Courier - A fast message broker for SMS and IP messages",
		[]string{filename},
	)

	loader.MustLoad()
	return config
}