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// Copyright 2019 Google Inc. All Rights Reserved.
//
// 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 auth
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/url"
)
// ActionCodeSettings specifies the required continue/state URL with optional Android and iOS settings. Used when
// invoking the email action link generation APIs.
type ActionCodeSettings struct {
URL string `json:"continueUrl"`
HandleCodeInApp bool `json:"canHandleCodeInApp"`
IOSBundleID string `json:"iOSBundleId,omitempty"`
AndroidPackageName string `json:"androidPackageName,omitempty"`
AndroidMinimumVersion string `json:"androidMinimumVersion,omitempty"`
AndroidInstallApp bool `json:"androidInstallApp,omitempty"`
LinkDomain string `json:"linkDomain,omitempty"`
// Deprecated: Use LinkDomain instead.
DynamicLinkDomain string `json:"dynamicLinkDomain,omitempty"`
}
func (settings *ActionCodeSettings) toMap() (map[string]interface{}, error) {
if settings.URL == "" {
return nil, errors.New("URL must not be empty")
}
url, err := url.Parse(settings.URL)
if err != nil || url.Scheme == "" || url.Host == "" {
return nil, fmt.Errorf("malformed url string: %q", settings.URL)
}
if settings.AndroidMinimumVersion != "" || settings.AndroidInstallApp {
if settings.AndroidPackageName == "" {
return nil, errors.New("Android package name is required when specifying other Android settings")
}
}
b, err := json.Marshal(settings)
if err != nil {
return nil, err
}
var result map[string]interface{}
if err := json.Unmarshal(b, &result); err != nil {
return nil, err
}
return result, nil
}
type linkType string
const (
emailLinkSignIn linkType = "EMAIL_SIGNIN"
emailVerification linkType = "VERIFY_EMAIL"
passwordReset linkType = "PASSWORD_RESET"
)
// EmailVerificationLink generates the out-of-band email action link for email verification flows for the specified
// email address.
func (c *baseClient) EmailVerificationLink(ctx context.Context, email string) (string, error) {
return c.EmailVerificationLinkWithSettings(ctx, email, nil)
}
// EmailVerificationLinkWithSettings generates the out-of-band email action link for email verification flows for the
// specified email address, using the action code settings provided.
func (c *baseClient) EmailVerificationLinkWithSettings(
ctx context.Context, email string, settings *ActionCodeSettings) (string, error) {
return c.generateEmailActionLink(ctx, emailVerification, email, settings)
}
// PasswordResetLink generates the out-of-band email action link for password reset flows for the specified email
// address.
func (c *baseClient) PasswordResetLink(ctx context.Context, email string) (string, error) {
return c.PasswordResetLinkWithSettings(ctx, email, nil)
}
// PasswordResetLinkWithSettings generates the out-of-band email action link for password reset flows for the
// specified email address, using the action code settings provided.
func (c *baseClient) PasswordResetLinkWithSettings(
ctx context.Context, email string, settings *ActionCodeSettings) (string, error) {
return c.generateEmailActionLink(ctx, passwordReset, email, settings)
}
// EmailSignInLink generates the out-of-band email action link for email link sign-in flows, using the action
// code settings provided.
func (c *baseClient) EmailSignInLink(
ctx context.Context, email string, settings *ActionCodeSettings) (string, error) {
return c.generateEmailActionLink(ctx, emailLinkSignIn, email, settings)
}
func (c *baseClient) generateEmailActionLink(
ctx context.Context, linkType linkType, email string, settings *ActionCodeSettings) (string, error) {
if email == "" {
return "", errors.New("email must not be empty")
}
if linkType == emailLinkSignIn && settings == nil {
return "", errors.New("ActionCodeSettings must not be nil when generating sign-in links")
}
payload := map[string]interface{}{
"requestType": linkType,
"email": email,
"returnOobLink": true,
}
if settings != nil {
settingsMap, err := settings.toMap()
if err != nil {
return "", err
}
for k, v := range settingsMap {
payload[k] = v
}
}
var result struct {
OOBLink string `json:"oobLink"`
}
_, err := c.post(ctx, "/accounts:sendOobCode", payload, &result)
return result.OOBLink, err
}
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