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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package incoming
import (
"bytes"
"context"
"fmt"
issues_model "code.gitea.io/gitea/models/issues"
access_model "code.gitea.io/gitea/models/perm/access"
repo_model "code.gitea.io/gitea/models/repo"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
attachment_service "code.gitea.io/gitea/services/attachment"
"code.gitea.io/gitea/services/context/upload"
issue_service "code.gitea.io/gitea/services/issue"
incoming_payload "code.gitea.io/gitea/services/mailer/incoming/payload"
"code.gitea.io/gitea/services/mailer/token"
pull_service "code.gitea.io/gitea/services/pull"
)
type MailHandler interface {
Handle(ctx context.Context, content *MailContent, doer *user_model.User, payload []byte) error
}
var handlers = map[token.HandlerType]MailHandler{
token.ReplyHandlerType: &ReplyHandler{},
token.UnsubscribeHandlerType: &UnsubscribeHandler{},
}
// ReplyHandler handles incoming emails to create a reply from them
type ReplyHandler struct{}
func (h *ReplyHandler) Handle(ctx context.Context, content *MailContent, doer *user_model.User, payload []byte) error {
if doer == nil {
return util.NewInvalidArgumentErrorf("doer can't be nil")
}
ref, err := incoming_payload.GetReferenceFromPayload(ctx, payload)
if err != nil {
return err
}
var issue *issues_model.Issue
switch r := ref.(type) {
case *issues_model.Issue:
issue = r
case *issues_model.Comment:
comment := r
if err := comment.LoadIssue(ctx); err != nil {
return err
}
issue = comment.Issue
default:
return util.NewInvalidArgumentErrorf("unsupported reply reference: %v", ref)
}
if err := issue.LoadRepo(ctx); err != nil {
return err
}
perm, err := access_model.GetUserRepoPermission(ctx, issue.Repo, doer)
if err != nil {
return err
}
// Locked issues require write permissions
if issue.IsLocked && !perm.CanWriteIssuesOrPulls(issue.IsPull) && !doer.IsAdmin {
log.Debug("can't write issue or pull")
return nil
}
if !perm.CanReadIssuesOrPulls(issue.IsPull) {
log.Debug("can't read issue or pull")
return nil
}
log.Trace("incoming mail related to %T", ref)
attachmentIDs := make([]string, 0, len(content.Attachments))
if setting.Attachment.Enabled {
for _, attachment := range content.Attachments {
a, err := attachment_service.UploadAttachment(ctx, bytes.NewReader(attachment.Content), setting.Attachment.AllowedTypes, int64(len(attachment.Content)), &repo_model.Attachment{
Name: attachment.Name,
UploaderID: doer.ID,
RepoID: issue.Repo.ID,
})
if err != nil {
if upload.IsErrFileTypeForbidden(err) {
log.Info("Skipping disallowed attachment type: %s", attachment.Name)
continue
}
return err
}
attachmentIDs = append(attachmentIDs, a.UUID)
}
}
if content.Content == "" && len(attachmentIDs) == 0 {
log.Trace("incoming mail has no content and no attachment", ref)
return nil
}
switch r := ref.(type) {
case *issues_model.Issue:
_, err = issue_service.CreateIssueComment(ctx, doer, issue.Repo, issue, content.Content, attachmentIDs)
if err != nil {
return fmt.Errorf("CreateIssueComment failed: %w", err)
}
case *issues_model.Comment:
comment := r
switch comment.Type {
case issues_model.CommentTypeComment, issues_model.CommentTypeReview:
_, err = issue_service.CreateIssueComment(ctx, doer, issue.Repo, issue, content.Content, attachmentIDs)
if err != nil {
return fmt.Errorf("CreateIssueComment failed: %w", err)
}
case issues_model.CommentTypeCode:
_, err := pull_service.CreateCodeComment(
ctx,
doer,
nil,
issue,
comment.Line,
content.Content,
comment.TreePath,
false, // not pending review but a single review
comment.ReviewID,
"",
attachmentIDs,
)
if err != nil {
return fmt.Errorf("CreateCodeComment failed: %w", err)
}
default:
log.Trace("incoming mail related to comment of type %v is ignored", comment.Type)
}
default:
log.Trace("incoming mail related to %T is ignored", ref)
}
return nil
}
// UnsubscribeHandler handles unwatching issues/pulls
type UnsubscribeHandler struct{}
func (h *UnsubscribeHandler) Handle(ctx context.Context, _ *MailContent, doer *user_model.User, payload []byte) error {
if doer == nil {
return util.NewInvalidArgumentErrorf("doer can't be nil")
}
ref, err := incoming_payload.GetReferenceFromPayload(ctx, payload)
if err != nil {
return err
}
switch r := ref.(type) {
case *issues_model.Issue:
issue := r
if err := issue.LoadRepo(ctx); err != nil {
return err
}
perm, err := access_model.GetUserRepoPermission(ctx, issue.Repo, doer)
if err != nil {
return err
}
if !perm.CanReadIssuesOrPulls(issue.IsPull) {
log.Debug("can't read issue or pull")
return nil
}
return issues_model.CreateOrUpdateIssueWatch(ctx, doer.ID, issue.ID, false)
default:
return fmt.Errorf("unsupported unsubscribe reference: %v", ref)
}
}
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