chore: add user schema

internal/api/validator.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"net/http"
+	"regexp"
 
 	"github.com/go-playground/validator/v10"
 	"github.com/labstack/echo/v4"
@@ -17,3 +18,21 @@ func (validator *CustomValidator) Validate(i any) error {
 	}
 	return nil
 }
+
+func PasswordValidator(fieldLevel validator.FieldLevel) bool {
+	password := fieldLevel.Field().String()
+
+	var (
+		upper    = regexp.MustCompile(`[A-Z]`)
+		lower    = regexp.MustCompile(`[a-z]`)
+		number   = regexp.MustCompile(`[0-9]`)
+		special  = regexp.MustCompile(`[!@#~$%^&*()+|_{}:<>?,./;'\[\]\\-]`)
+		minChars = 8
+	)
+
+	return len(password) >= minChars &&
+		upper.MatchString(password) &&
+		lower.MatchString(password) &&
+		number.MatchString(password) &&
+		special.MatchString(password)
+}