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twitter.go
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twitter.go
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package twitter
import (
"encoding/json"
"log"
"net/http"
"github.com/dghubble/gologin/v2"
"github.com/dghubble/gologin/v2/twitter"
"github.com/dghubble/oauth1"
"github.com/diamondburned/facechat/backend/db"
"github.com/diamondburned/facechat/backend/dotenv"
"github.com/diamondburned/facechat/backend/facechat"
"github.com/diamondburned/facechat/backend/http/addr"
"github.com/diamondburned/facechat/backend/http/auth"
"github.com/diamondburned/facechat/backend/http/tx"
"github.com/diamondburned/facechat/backend/internal/httperr"
"github.com/go-chi/chi"
"github.com/pkg/errors"
twitterauth "github.com/dghubble/oauth1/twitter"
)
var cfg = oauth1.Config{}
func init() {
cfg.ConsumerKey = dotenv.Getenv("TWITTER_CONSUMER_KEY")
if cfg.ConsumerKey == "" {
log.Fatalln("Missing $TWITTER_CONSUMER_KEY")
}
cfg.ConsumerSecret = dotenv.Getenv("TWITTER_CONSUMER_SECRET")
if cfg.ConsumerSecret == "" {
log.Fatalln("Missing $TWITTER_CONSUMER_SECRET")
}
// TODO: improve
url := addr.HTTP()
url.Path += "/oauth/twitter/callback"
cfg.CallbackURL = url.String()
cfg.Endpoint = twitterauth.AuthorizeEndpoint
}
func Mount() http.Handler {
r := chi.NewMux()
r.Mount("/login", twitter.LoginHandler(&cfg, http.HandlerFunc(onError)))
r.Mount("/callback", twitter.CallbackHandler(
&cfg,
http.HandlerFunc(issueSession),
http.HandlerFunc(onError),
))
return r
}
type Data struct {
ID int64 `json:"id"`
Username string `json:"username"` // .Login
AvatarURL string `json:"avatar_url"` // .AvatarURL
}
var (
ErrUnknown = httperr.New(500, "unknown error")
ErrMissingID = httperr.New(500, "missing ID")
ErrMissingUsername = httperr.New(500, "missing username")
)
func issueSession(w http.ResponseWriter, r *http.Request) {
s := auth.Session(r)
u, err := twitter.UserFromContext(r.Context())
if err != nil {
httperr.WriteErr(w, errors.Wrap(err, "failed to get Twitter user"))
return
}
var data = Data{
ID: u.ID,
Username: u.ScreenName,
AvatarURL: u.ProfileImageURLHttps,
}
dataJSON, err := json.Marshal(data)
if err != nil {
httperr.WriteErr(w, errors.Wrap(err, "failed to marshal Twitter data"))
return
}
var name = data.Username
if u.Name != "" {
name = u.Name
}
var account = facechat.Account{
Service: "Twitter",
Name: name,
URL: u.URL,
Data: dataJSON,
UserID: s.UserID,
}
err = tx.Acquire(r, func(tx *db.Tx) error {
return errors.Wrap(tx.AddAccount(account), "failed to save")
})
if err != nil {
httperr.WriteErr(w, err)
return
}
if err := json.NewEncoder(w).Encode(account); err != nil {
httperr.WriteErr(w, errors.Wrap(err, "failed to encode"))
}
// TODO: redirect back to profile?
http.Redirect(w, r, "/user", http.StatusFound)
}
func onError(w http.ResponseWriter, r *http.Request) {
err := gologin.ErrorFromContext(r.Context())
if err == nil {
err = ErrUnknown
}
httperr.WriteErr(w, err)
}