forgejo/services/mailer/incoming/payload/payload.go

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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package payload
import (
"context"
issues_model "code.gitea.io/gitea/models/issues"
"code.gitea.io/gitea/modules/util"
)
const replyPayloadVersion1 byte = 1
type payloadReferenceType byte
const (
payloadReferenceIssue payloadReferenceType = iota
payloadReferenceComment
)
// CreateReferencePayload creates data which GetReferenceFromPayload resolves to the reference again.
func CreateReferencePayload(reference any) ([]byte, error) {
var refType payloadReferenceType
var refID int64
switch r := reference.(type) {
case *issues_model.Issue:
refType = payloadReferenceIssue
refID = r.ID
case *issues_model.Comment:
refType = payloadReferenceComment
refID = r.ID
default:
return nil, util.NewInvalidArgumentErrorf("unsupported reference type: %T", r)
}
payload, err := util.PackData(refType, refID)
if err != nil {
return nil, err
}
return append([]byte{replyPayloadVersion1}, payload...), nil
}
// GetReferenceFromPayload resolves the reference from the payload
func GetReferenceFromPayload(ctx context.Context, payload []byte) (any, error) {
if len(payload) < 1 {
return nil, util.NewInvalidArgumentErrorf("payload to small")
}
if payload[0] != replyPayloadVersion1 {
return nil, util.NewInvalidArgumentErrorf("unsupported payload version")
}
var ref payloadReferenceType
var id int64
if err := util.UnpackData(payload[1:], &ref, &id); err != nil {
return nil, err
}
switch ref {
case payloadReferenceIssue:
return issues_model.GetIssueByID(ctx, id)
case payloadReferenceComment:
return issues_model.GetCommentByID(ctx, id)
default:
return nil, util.NewInvalidArgumentErrorf("unsupported reference type: %T", ref)
}
}