/* Copyright © 2023 Philipp Wolfer Scotty is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Scotty is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Scotty. If not, see . */ package lastfm import ( "net/url" "github.com/shkh/lastfm-go/lastfm" "go.uploadedlobster.com/scotty/internal/auth" "golang.org/x/oauth2" ) type lastfmStrategy struct { client *lastfm.Api redirectUrl *url.URL } func (s lastfmStrategy) Config() oauth2.Config { return oauth2.Config{} } func (s lastfmStrategy) AuthCodeURL(verifier string, state string) auth.AuthUrl { // Last.fm does not use OAuth2, but the provided authorization flow with // callback URL is close enough we can shoehorn it into the existing // authentication strategy. // TODO: Investigate and use callback-less flow with api.GetAuthTokenUrl(token) url := s.client.GetAuthRequestUrl(s.redirectUrl.String()) return auth.AuthUrl{ Url: url, State: "", // last.fm does not use state Param: "token", } } func (s lastfmStrategy) ExchangeToken(code auth.CodeResponse, verifier string) (*oauth2.Token, error) { // The token is directly valid err := s.client.LoginWithToken(code.Code) if err != nil { return nil, err } sk := s.client.GetSessionKey() return &oauth2.Token{AccessToken: sk}, nil }