Initial dumb servers

server/config/config.go

@@ -0,0 +1,34 @@
+package config
+
+import (
+	"fmt"
+	"local/storage"
+	"sync"
+)
+
+var config Config
+var lock = &sync.RWMutex{}
+
+type Config struct {
+	db       string
+	DB       storage.DB
+	Port     string
+	Addr     string
+	Username string
+	Password string
+}
+
+func Values() Config {
+	lock.RLock()
+	defer lock.RUnlock()
+	return config
+}
+
+func (c Config) String() string {
+	return fmt.Sprintf(
+		"port:%v db:%v addr:%v user:*** pass:***",
+		c.Port,
+		c.db,
+		c.Addr,
+	)
+}

server/config/new.go

@@ -0,0 +1,28 @@
+package config
+
+import (
+	"local/storage"
+	"os"
+)
+
+func New() error {
+	config = Config{
+		db:       orEnv(storage.MAP.String(), "DB", "DATABASE"),
+		Addr:     orEnv("", "ADDR", "FILE"),
+		Username: orEnv("", "USER", "USERNAME"),
+		Password: orEnv("", "PASS", "PASSWORD"),
+		Port:     orEnv("21412", "PORT", "LISTEN"),
+	}
+	DB, err := storage.New(storage.TypeFromString(config.db), config.Addr, config.Username, config.Password)
+	config.DB = DB
+	return err
+}
+
+func orEnv(def, key string, keys ...string) string {
+	for _, key := range append(keys, key) {
+		if v, ok := os.LookupEnv(key); ok {
+			return v
+		}
+	}
+	return def
+}

server/config/new_test.go

@@ -0,0 +1,37 @@
+package config
+
+import (
+	"os"
+	"testing"
+)
+
+func TestNew(t *testing.T) {
+	invalidEnv := "&&&&&&"
+	keys := []string{
+		"DB",
+		"DATABASE",
+		"ADDR",
+		"PATH",
+		"USER",
+		"USERNAME",
+		"PASS",
+		"PASSWORD",
+	}
+	was := make(map[string]string)
+	for _, k := range keys {
+		v, ok := os.LookupEnv(k)
+		if !ok {
+			v = invalidEnv
+		}
+		was[k] = v
+	}
+	defer func() {
+		for k, v := range was {
+			if v != invalidEnv {
+				os.Setenv(k, v)
+			} else {
+				os.Unsetenv(k)
+			}
+		}
+	}()
+}