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			94 lines
		
	
	
	
		
			3.4 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
/*
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   GoToSocial
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   Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
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   This program is free software: you can redistribute it and/or modify
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   it under the terms of the GNU Affero General Public License as published by
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   the Free Software Foundation, either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU Affero General Public License for more details.
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   You should have received a copy of the GNU Affero General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.
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*/
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package federation
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import (
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	"context"
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	"fmt"
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	"net/url"
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	"github.com/superseriousbusiness/activity/streams"
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	"github.com/superseriousbusiness/gotosocial/internal/federation/dereferencing"
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	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
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	"github.com/superseriousbusiness/gotosocial/internal/transport"
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)
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func (p *processor) GetStatus(ctx context.Context, requestedUsername string, requestedStatusID string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
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	// get the account the request is referring to
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	requestedAccount, err := p.db.GetAccountByUsernameDomain(ctx, requestedUsername, "")
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	if err != nil {
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		return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
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	}
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	// authenticate the request
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	requestingAccountURI, errWithCode := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
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	if errWithCode != nil {
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		return nil, errWithCode
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	}
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	requestingAccount, err := p.federator.GetAccount(transport.WithFastfail(ctx), dereferencing.GetAccountParams{
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		RequestingUsername: requestedUsername,
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		RemoteAccountID:    requestingAccountURI,
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	})
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	if err != nil {
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		return nil, gtserror.NewErrorUnauthorized(err)
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	}
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	// authorize the request:
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	// 1. check if a block exists between the requester and the requestee
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	blocked, err := p.db.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID, true)
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	if err != nil {
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		return nil, gtserror.NewErrorInternalError(err)
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	}
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	if blocked {
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		return nil, gtserror.NewErrorUnauthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
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	}
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	// get the status out of the database here
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	s, err := p.db.GetStatusByID(ctx, requestedStatusID)
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	if err != nil {
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		return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting status with id %s and account id %s: %s", requestedStatusID, requestedAccount.ID, err))
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	}
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	if s.AccountID != requestedAccount.ID {
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		return nil, gtserror.NewErrorNotFound(fmt.Errorf("status with id %s does not belong to account with id %s", s.ID, requestedAccount.ID))
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	}
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	visible, err := p.filter.StatusVisible(ctx, s, requestingAccount)
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	if err != nil {
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		return nil, gtserror.NewErrorInternalError(err)
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	}
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	if !visible {
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		return nil, gtserror.NewErrorNotFound(fmt.Errorf("status with id %s not visible to user with id %s", s.ID, requestingAccount.ID))
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	}
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	// requester is authorized to view the status, so convert it to AP representation and serialize it
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	asStatus, err := p.tc.StatusToAS(ctx, s)
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	if err != nil {
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		return nil, gtserror.NewErrorInternalError(err)
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	}
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	data, err := streams.Serialize(asStatus)
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	if err != nil {
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		return nil, gtserror.NewErrorInternalError(err)
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	}
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	return data, nil
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}
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