refactor auth pkg into libraries

auth/jwt/claims.go

@@ -0,0 +1,59 @@
+package jwt
+
+import (
+	"errors"
+
+	"github.com/go-chi/jwtauth"
+)
+
+// AppClaims represent the claims parsed from JWT access token.
+type AppClaims struct {
+	ID    int
+	Sub   string
+	Roles []string
+}
+
+// ParseClaims parses JWT claims into AppClaims.
+func (c *AppClaims) ParseClaims(claims jwtauth.Claims) error {
+	id, ok := claims.Get("id")
+	if !ok {
+		return errors.New("could not parse claim id")
+	}
+	c.ID = int(id.(float64))
+
+	sub, ok := claims.Get("sub")
+	if !ok {
+		return errors.New("could not parse claim sub")
+	}
+	c.Sub = sub.(string)
+
+	rl, ok := claims.Get("roles")
+	if !ok {
+		return errors.New("could not parse claims roles")
+	}
+
+	var roles []string
+	if rl != nil {
+		for _, v := range rl.([]interface{}) {
+			roles = append(roles, v.(string))
+		}
+	}
+	c.Roles = roles
+
+	return nil
+}
+
+// RefreshClaims represent the claims parsed from JWT refresh token.
+type RefreshClaims struct {
+	Token string
+}
+
+// ParseClaims parses the JWT claims into RefreshClaims.
+func (c *RefreshClaims) ParseClaims(claims jwtauth.Claims) error {
+	token, ok := claims.Get("token")
+	if !ok {
+		return errors.New("could not parse claim token")
+	}
+	c.Token = token.(string)
+	return nil
+}