103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
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package main
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import (
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"errors"
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"fmt"
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// "log"
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"os"
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"strconv"
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// "net"
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// "net/mail"
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// "gopkg.in/russross/blackfriday.v2"
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)
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type ConfigEntry struct {
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Type string
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Ptr interface{}
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Values []string
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}
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type Config struct {
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EmailFrom string
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EmailTo string
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EmailSubject string
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SmtpHostname string
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SmtpPort uint16
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SmtpUsername string
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SmtpPassword string
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SmtpAuthType string
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SmtpSecurityType string
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TrelloUrl string
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TrelloToken string
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}
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func NewConfig() *Config {
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return &Config{}
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}
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func (config *Config) ParseEnv() (int, error) {
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// map env variables to config pointers
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dataMap := map[string](ConfigEntry){
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"EMAIL_FROM": ConfigEntry{"string", &(config.EmailFrom), nil},
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"EMAIL_TO": ConfigEntry{"string", &(config.EmailTo), nil},
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"EMAIL_SUBJECT": ConfigEntry{"string", &(config.EmailSubject), nil},
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"TRELLO_URL": ConfigEntry{"string", &(config.TrelloUrl), nil},
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"TRELLO_TOKEN": ConfigEntry{"string", &(config.TrelloToken), nil},
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"SMTP_HOSTNAME": ConfigEntry{"string", &(config.SmtpHostname), nil},
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"SMTP_USERNAME": ConfigEntry{"string", &(config.SmtpUsername), nil},
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"SMTP_PASSWORD": ConfigEntry{"string", &(config.SmtpPassword), nil},
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"SMTP_PORT": ConfigEntry{"uint16", &(config.SmtpPort), nil},
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"SMTP_AUTH_TYPE": ConfigEntry{"string", &(config.SmtpAuthType), []string{"none", "plain", "login"}},
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"SMTP_SECURITY_TYPE": ConfigEntry{"string", &(config.SmtpSecurityType), []string{"none", "tls", "starttls"}},
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}
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for envVar, mapEntry := range dataMap {
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envValue := os.Getenv(envVar)
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if len(envValue) == 0 {
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return -1, errors.New(fmt.Sprintf(
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"Empty environment variable. Please set %s value", envVar))
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}
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if mapEntry.Values != nil {
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allowedValue := false
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for _, v := range mapEntry.Values {
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if v == envValue {
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allowedValue = true
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}
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}
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if !allowedValue {
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return -1, errors.New(fmt.Sprintf(
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"Wrong value for %s=%s. Value must be one of %v", envVar, envValue, mapEntry.Values))
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}
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}
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switch mapEntry.Type {
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case "string":
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*(mapEntry.Ptr.(*string)) = envValue
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case "uint16":
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u64, err := strconv.ParseUint(envValue, 10, 16)
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if err != nil {
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return -1, errors.New(fmt.Sprintf(
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"Unable to convert %s=%s to unsigned int", envVar, envValue))
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}
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*(mapEntry.Ptr.(*uint16)) = uint16(u64)
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case "bool":
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b, err := strconv.ParseBool(envValue)
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if err != nil {
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return -1, errors.New(fmt.Sprintf(
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"Unable to convert %s=%s to boolean", envVar, envValue))
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}
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*(mapEntry.Ptr.(*bool)) = b
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default:
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return -1, errors.New(fmt.Sprintf("Undefined parser for %s<%s>", envVar, mapEntry.Type))
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}
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}
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fmt.Printf("%#v\n", config)
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return 0, nil
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}
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