add default config

config/config.go

@@ -0,0 +1,53 @@
+package config
+
+import (
+	"os"
+	"strconv"
+)
+
+type Database struct {
+	Driver string `json:"driver" yaml:"driver"`
+	DSN    string `json:"dsn" yaml:"dsn"`
+}
+
+type Redis struct {
+	Addr     string `json:"addr" yaml:"addr"`
+	Password string `json:"password" yaml:"password"`
+	DB       int    `json:"db" yaml:"db"`
+}
+
+type Auth struct {
+	TTL       int64    `json:"ttl" yaml:"ttl"`
+	Secret    string   `json:"secret" yaml:"secret"`
+	AllowUrls []string `json:"allow_urls" yaml:"allowUrls"`
+}
+
+type Translate struct {
+	ClientKey   string `json:"client_key" yaml:"clientKey"`
+	ServerKey   string `json:"server_key" yaml:"serverKey"`
+	ValidateUrl string `json:"validate_url" yaml:"validateUrl"`
+}
+
+type Config struct {
+	Auth      Auth      `json:"auth" yaml:"auth"`
+	Redis     Redis     `json:"redis" yaml:"redis"`
+	Translate Translate `json:"translate" yaml:"translate"`
+	Database  Database  `json:"database" yaml:"database"`
+}
+
+func (c *Config) FromEnvironment() {
+	c.Auth.Secret = os.Getenv("JWT_SECRET")
+	c.Auth.TTL = 7200
+
+	c.Database.Driver = os.Getenv("DATABASE_DRIVER")
+	c.Database.DSN = os.Getenv("DATABASE_DSN")
+	if c.Database.Driver == "" {
+		c.Database.Driver = "mysql"
+	}
+
+	c.Redis.Addr = os.Getenv("REDIS_ADDRESS")
+	c.Redis.Password = os.Getenv("REDIS_PASSWORD")
+	if n, err := strconv.Atoi(os.Getenv("REDIS_DB")); err == nil {
+		c.Redis.DB = n
+	}
+}