73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
package usecase
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import (
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"context"
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"encoding/json"
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"fmt"
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http "github.com/valyala/fasthttp"
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"source.toby3d.me/website/indieauth/internal/common"
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"source.toby3d.me/website/indieauth/internal/domain"
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"source.toby3d.me/website/indieauth/internal/ticket"
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)
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type (
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//nolint: tagliatelle
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Response struct {
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Me *domain.Me `json:"me"`
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Scope domain.Scopes `json:"scope"`
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AccessToken string `json:"access_token"`
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TokenType string `json:"token_type"`
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}
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ticketUseCase struct {
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client *http.Client
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repo ticket.Repository
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}
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)
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func NewTicketUseCase(repo ticket.Repository, client *http.Client) ticket.UseCase {
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return &ticketUseCase{
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client: client,
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repo: repo,
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}
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}
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func (useCase *ticketUseCase) Redeem(ctx context.Context, ticket *domain.Ticket) (*domain.Token, error) {
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endpoint, err := useCase.repo.Get(ctx, ticket.Resource)
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if err != nil {
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return nil, fmt.Errorf("cannot discovery token endpoint: %w", err)
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}
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req := http.AcquireRequest()
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defer http.ReleaseRequest(req)
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req.Header.SetMethod(http.MethodPost)
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req.SetRequestURIBytes(endpoint.FullURI())
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req.Header.SetContentType(common.MIMEApplicationForm)
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req.Header.Set(http.HeaderAccept, common.MIMEApplicationJSON)
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req.PostArgs().Set("grant_type", domain.GrantTypeTicket.String())
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req.PostArgs().Set("ticket", ticket.Ticket)
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resp := http.AcquireResponse()
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defer http.ReleaseResponse(resp)
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if err := useCase.client.Do(req, resp); err != nil {
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return nil, err
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}
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data := new(Response)
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if err := json.Unmarshal(resp.Body(), data); err != nil {
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return nil, fmt.Errorf("cannot unmarshal access token response: %w", err)
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}
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// TODO(toby3d): should this also include client_id?
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// https://github.com/indieweb/indieauth/issues/85
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return &domain.Token{
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ClientID: nil,
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AccessToken: data.AccessToken,
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Me: data.Me,
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Scope: data.Scope,
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}, nil
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}
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