forked from markbates/goth
/
seatalk.go
162 lines (136 loc) · 4.06 KB
/
seatalk.go
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package seatalk
import (
"context"
"encoding/json"
"io/ioutil"
"net/http"
"net/url"
"strings"
"fmt"
"github.com/bgdsh/goth"
"golang.org/x/oauth2"
)
// Endpoint is SeaTalk's OAuth 2.0 endpoint.
var Endpoint = oauth2.Endpoint{
AuthURL: "https://seatalkweb.com/webapp/oauth2/authorize",
TokenURL: "https://seatalkweb.com/webapp/oauth2/token",
}
const endpointProfile string = "https://seatalkweb.com/webapp/oauth2/profile"
// Provider is the implementation of `goth.Provider` for accessing SeaTalk.
type Provider struct {
ClientKey string
Secret string
CallbackURL string
config *oauth2.Config
providerName string
}
// New creates a new SeaTalk provider and sets up important connection details.
// You should always call `seatalk.New` to get a new provider. Never try to
// create one manually.
func New(clientKey, secret, callbackURL string, scopes ...string) *Provider {
p := &Provider{
ClientKey: clientKey,
Secret: secret,
CallbackURL: callbackURL,
providerName: "seatalk",
}
p.config = newConfig(p, scopes)
return p
}
// Name is the name used to retrieve this provider later.
func (p *Provider) Name() string {
return p.providerName
}
// SetName is to update the name of the provider (needed in case of multiple providers of 1 type)
func (p *Provider) SetName(name string) {
p.providerName = name
}
// BeginAuth asks SeaTalk for an authentication endpoint.
func (p *Provider) BeginAuth(state string) (goth.Session, error) {
url := p.config.AuthCodeURL(state)
session := &Session{
AuthURL: url,
}
return session, nil
}
// UnmarshalSession will unmarshal a JSON string into a session.
func (p *Provider) UnmarshalSession(data string) (goth.Session, error) {
sess := &Session{}
err := json.NewDecoder(strings.NewReader(data)).Decode(sess)
return sess, err
}
type seatalkUser struct {
ID string `json:"user_id"`
Name string `json:"name"`
Email string `json:"email"`
}
// FetchUser will go to SeaTalk and access basic information about the user.
func (p *Provider) FetchUser(session goth.Session) (goth.User, error) {
sess := session.(*Session)
user := goth.User{
AccessToken: sess.AccessToken,
Provider: p.Name(),
RefreshToken: sess.RefreshToken,
ExpiresAt: sess.ExpiresAt,
}
if user.AccessToken == "" {
// Data is not yet retrieved, since accessToken is still empty.
return user, fmt.Errorf("%s cannot get user information without accessToken", p.providerName)
}
response, err := http.Get(endpointProfile + "?access_token=" + url.QueryEscape(sess.AccessToken))
if err != nil {
return user, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return user, fmt.Errorf("%s responded with a %d trying to fetch user information", p.providerName, response.StatusCode)
}
responseBytes, err := ioutil.ReadAll(response.Body)
if err != nil {
return user, err
}
var u seatalkUser
if err := json.Unmarshal(responseBytes, &u); err != nil {
return user, err
}
// Extract the user data we got from Google into our goth.User.
user.Name = u.Name
user.NickName = u.Name
user.Email = u.Email
user.UserID = u.ID
return user, nil
}
// Debug is a no-op for the seatalk package.
func (p *Provider) Debug(bool) {
}
//RefreshToken get new access token based on the refresh token
func (p *Provider) RefreshToken(refreshToken string) (*oauth2.Token, error) {
token := &oauth2.Token{RefreshToken: refreshToken}
ts := p.config.TokenSource(context.Background(), token)
newToken, err := ts.Token()
if err != nil {
return nil, err
}
return newToken, err
}
func newConfig(provider *Provider, scopes []string) *oauth2.Config {
c := &oauth2.Config{
ClientID: provider.ClientKey,
ClientSecret: provider.Secret,
RedirectURL: provider.CallbackURL,
Endpoint: Endpoint,
Scopes: []string{},
}
if len(scopes) > 0 {
for _, scope := range scopes {
c.Scopes = append(c.Scopes, scope)
}
} else {
c.Scopes = []string{"email"}
}
return c
}
//RefreshTokenAvailable refresh token is provided by auth provider or not
func (p *Provider) RefreshTokenAvailable() bool {
return true
}