/*
Copyright 2017 Google Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package client

import (
	"golang.org/x/net/context"

	"google.golang.org/grpc/credentials"
)

// passCred is an username/password implementation of credentials.Credentials.
type passCred struct {
	username string
	password string
	secure   bool
}

// GetRequestMetadata returns the current request metadata, including
// username and password in this case.
// This implements the required interface fuction of credentials.Credentials.
func (pc *passCred) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
	return map[string]string{
		"username": pc.username,
		"password": pc.password,
	}, nil
}

// RequireTransportSecurity indicates whether the credentials requires transport security.
// This implements the required interface fuction of credentials.Credentials.
func (pc *passCred) RequireTransportSecurity() bool {
	return pc.secure
}

// newPassCred returns a newly created passCred as credentials.Credentials.
func newPassCred(username, password string, secure bool) credentials.PerRPCCredentials {
	return &passCred{
		username: username,
		password: password,
		secure:   secure,
	}
}
