99 lines
2.1 KiB
Go
99 lines
2.1 KiB
Go
package auth
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import (
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"net/http"
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"os"
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"codeberg.org/u1f320/pronouns.cc/backend/log"
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"codeberg.org/u1f320/pronouns.cc/backend/server"
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"emperror.dev/errors"
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"github.com/go-chi/chi/v5"
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"github.com/go-chi/render"
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)
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type Server struct {
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*server.Server
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RequireInvite bool
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}
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func Mount(srv *server.Server, r chi.Router) {
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s := &Server{
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Server: srv,
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RequireInvite: os.Getenv("REQUIRE_INVITE") == "true",
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}
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r.Route("/auth", func(r chi.Router) {
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// check if username is taken
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r.Get("/username", server.WrapHandler(s.usernameTaken))
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// generate csrf token, returns all supported OAuth provider URLs
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r.Post("/urls", server.WrapHandler(s.oauthURLs))
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r.Route("/discord", func(r chi.Router) {
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// takes code + state, validates it, returns token OR discord signup ticket
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r.Post("/callback", server.WrapHandler(s.discordCallback))
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// takes discord signup ticket to register account
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r.Post("/signup", nil)
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})
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})
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}
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type oauthURLsRequest struct {
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CallbackDomain string `json:"callback_domain"`
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}
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type oauthURLsResponse struct {
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Discord string `json:"discord"`
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}
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func (s *Server) oauthURLs(w http.ResponseWriter, r *http.Request) error {
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req, err := Decode[oauthURLsRequest](r)
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if err != nil {
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log.Error(err)
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return server.APIError{Code: server.ErrBadRequest}
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}
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// generate CSRF state
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state, err := s.setCSRFState(r.Context())
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if err != nil {
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return errors.Wrap(err, "setting CSRF state")
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}
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// copy Discord config and set redirect url
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discordCfg := discordOAuthConfig
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discordCfg.RedirectURL = req.CallbackDomain + "/login/discord"
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render.JSON(w, r, oauthURLsResponse{
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Discord: discordCfg.AuthCodeURL(state),
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})
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return nil
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}
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func (s *Server) usernameTaken(w http.ResponseWriter, r *http.Request) error {
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type Response struct {
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Valid bool `json:"valid"`
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Taken bool `json:"taken"`
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}
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name := r.FormValue("username")
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if name == "" {
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render.JSON(w, r, Response{
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Valid: false,
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})
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return nil
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}
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valid, taken, err := s.DB.UsernameTaken(r.Context(), name)
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if err != nil {
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return err
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}
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render.JSON(w, r, Response{
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Valid: valid,
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Taken: taken,
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})
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return nil
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}
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