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pocketbase/tools/auth/twitch.go
2023-11-29 20:19:54 +02:00

97 lines
2.4 KiB
Go

package auth
import (
"context"
"encoding/json"
"errors"
"net/http"
"github.com/pocketbase/pocketbase/tools/types"
"golang.org/x/oauth2"
"golang.org/x/oauth2/twitch"
)
var _ Provider = (*Twitch)(nil)
// NameTwitch is the unique name of the Twitch provider.
const NameTwitch string = "twitch"
// Twitch allows authentication via Twitch OAuth2.
type Twitch struct {
*baseProvider
}
// NewTwitchProvider creates new Twitch provider instance with some defaults.
func NewTwitchProvider() *Twitch {
return &Twitch{&baseProvider{
ctx: context.Background(),
displayName: "Twitch",
pkce: true,
scopes: []string{"user:read:email"},
authUrl: twitch.Endpoint.AuthURL,
tokenUrl: twitch.Endpoint.TokenURL,
userApiUrl: "https://api.twitch.tv/helix/users",
}}
}
// FetchAuthUser returns an AuthUser instance based the Twitch's user api.
//
// API reference: https://dev.twitch.tv/docs/api/reference#get-users
func (p *Twitch) FetchAuthUser(token *oauth2.Token) (*AuthUser, error) {
data, err := p.FetchRawUserData(token)
if err != nil {
return nil, err
}
rawUser := map[string]any{}
if err := json.Unmarshal(data, &rawUser); err != nil {
return nil, err
}
extracted := struct {
Data []struct {
Id string `json:"id"`
Login string `json:"login"`
DisplayName string `json:"display_name"`
Email string `json:"email"`
ProfileImageUrl string `json:"profile_image_url"`
} `json:"data"`
}{}
if err := json.Unmarshal(data, &extracted); err != nil {
return nil, err
}
if len(extracted.Data) == 0 {
return nil, errors.New("Failed to fetch AuthUser data")
}
user := &AuthUser{
Id: extracted.Data[0].Id,
Name: extracted.Data[0].DisplayName,
Username: extracted.Data[0].Login,
Email: extracted.Data[0].Email,
AvatarUrl: extracted.Data[0].ProfileImageUrl,
RawUser: rawUser,
AccessToken: token.AccessToken,
RefreshToken: token.RefreshToken,
}
user.Expiry, _ = types.ParseDateTime(token.Expiry)
return user, nil
}
// FetchRawUserData implements Provider.FetchRawUserData interface.
//
// This differ from baseProvider because Twitch requires the `Client-Id` header.
func (p *Twitch) FetchRawUserData(token *oauth2.Token) ([]byte, error) {
req, err := http.NewRequest("GET", p.userApiUrl, nil)
if err != nil {
return nil, err
}
req.Header.Set("Client-Id", p.clientId)
return p.sendRawUserDataRequest(req, token)
}