change to api only handler and remove unused files, bring more structure

internal/utils/hash.go

@@ -0,0 +1,14 @@
+package utils
+
+import "golang.org/x/crypto/bcrypt"
+
+// Hash password
+func HashPassword(password string) (string, error) {
+	b, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	return string(b), err
+}
+
+// Check password
+func CheckPassword(password, hash string) bool {
+	return bcrypt.CompareHashAndPassword([]byte(hash), []byte(password)) == nil
+}

internal/utils/utils.go

@@ -0,0 +1,8 @@
+package utils
+
+import "regexp"
+
+func IsValidEmail(email string) bool {
+	re := regexp.MustCompile(`^[a-zA-Z0-9._%+\-]+@[a-zA-Z0-9.\-]+\.[a-zA-Z]{2,}$`)
+	return re.MatchString(email)
+}