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read_config.go
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/
read_config.go
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package config
import (
"errors"
viperLib "github.com/spf13/viper"
)
type Server struct {
User string
Password string
Host string
Port int
}
type Queue struct {
Name string
Durable bool
DeleteWhenUnused bool
Exclusive bool
NoWait bool
NoLocal bool
AutoACK bool
}
type Config struct {
Server Server
Incoming Queue
Outgoing Queue
Origin string
}
func ReadConfig() (Config, error) {
var configFileLocation string
var config Config
var envVariable string = "MUSIC_MANAGER_SERVICE_CONFIG_FILE_LOCATION"
serverVariables := []string{"host", "port", "user", "password"}
queueNames := []string{"incoming", "outgoing"}
queueVariables := []string{"name"}
originVariables := []string{"name"}
viper := viperLib.New()
//Look for config file location defined as env var
viper.BindEnv(envVariable)
configFileLocation = viper.GetString(envVariable)
if configFileLocation == "" {
// Get config file from default location
configFileLocation = "/etc/music-manager/"
}
viper.SetConfigName("config")
viper.SetConfigType("toml")
viper.AddConfigPath(configFileLocation)
if err := viper.ReadInConfig(); err != nil {
return config, errors.New(errors.New("Fatal error reading config file: ").Error() + err.Error())
}
for _, server_variable := range serverVariables {
if !viper.IsSet("server." + server_variable) {
return config, errors.New("Fatal error config: no server " + server_variable + " was found.")
}
}
for _, queue := range queueNames {
for _, variable := range queueVariables {
if !viper.IsSet(queue + "." + variable) {
return config, errors.New("Fatal error config: no " + queue + " server " + variable + " variable was found.")
}
}
}
for _, origin_variable := range originVariables {
if !viper.IsSet("origin." + origin_variable) {
return config, errors.New("Fatal error config: no origin " + origin_variable + " was found.")
}
}
server := Server{User: viper.GetString("server.user"), Password: viper.GetString("server.password"), Host: viper.GetString("server.host"), Port: viper.GetInt("server.port")}
incoming := Queue{Name: viper.GetString("incoming.name")}
outgoing := Queue{Name: viper.GetString("outgoing.name")}
config.Server = server
config.Incoming = incoming
config.Outgoing = outgoing
config.Origin = viper.GetString("origin.name")
return config, nil
}