1 files changed, 294 insertions, 0 deletions
diff --git a/models/repo/attachment.go b/models/repo/attachment.go
new file mode 100644
index 0000000000..3fb331a202
--- /dev/null
+++ b/models/repo/attachment.go
@@ -0,0 +1,294 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package repo
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"path"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/storage"
+	"code.gitea.io/gitea/modules/timeutil"
+)
+
+// Attachment represent a attachment of issue/comment/release.
+type Attachment struct {
+	ID            int64  `xorm:"pk autoincr"`
+	UUID          string `xorm:"uuid UNIQUE"`
+	RepoID        int64  `xorm:"INDEX"`           // this should not be zero
+	IssueID       int64  `xorm:"INDEX"`           // maybe zero when creating
+	ReleaseID     int64  `xorm:"INDEX"`           // maybe zero when creating
+	UploaderID    int64  `xorm:"INDEX DEFAULT 0"` // Notice: will be zero before this column added
+	CommentID     int64
+	Name          string
+	DownloadCount int64              `xorm:"DEFAULT 0"`
+	Size          int64              `xorm:"DEFAULT 0"`
+	CreatedUnix   timeutil.TimeStamp `xorm:"created"`
+}
+
+func init() {
+	db.RegisterModel(new(Attachment))
+}
+
+// IncreaseDownloadCount is update download count + 1
+func (a *Attachment) IncreaseDownloadCount() error {
+	// Update download count.
+	if _, err := db.GetEngine(db.DefaultContext).Exec("UPDATE `attachment` SET download_count=download_count+1 WHERE id=?", a.ID); err != nil {
+		return fmt.Errorf("increase attachment count: %v", err)
+	}
+
+	return nil
+}
+
+// AttachmentRelativePath returns the relative path
+func AttachmentRelativePath(uuid string) string {
+	return path.Join(uuid[0:1], uuid[1:2], uuid)
+}
+
+// RelativePath returns the relative path of the attachment
+func (a *Attachment) RelativePath() string {
+	return AttachmentRelativePath(a.UUID)
+}
+
+// DownloadURL returns the download url of the attached file
+func (a *Attachment) DownloadURL() string {
+	return setting.AppURL + "attachments/" + url.PathEscape(a.UUID)
+}
+
+// GetAttachmentByID returns attachment by given id
+func GetAttachmentByID(id int64) (*Attachment, error) {
+	return getAttachmentByID(db.GetEngine(db.DefaultContext), id)
+}
+
+//    _____   __    __                .__                           __
+//   /  _  \_/  |__/  |______    ____ |  |__   _____   ____   _____/  |_
+//  /  /_\  \   __\   __\__  \ _/ ___\|  |  \ /     \_/ __ \ /    \   __\
+// /    |    \  |  |  |  / __ \\  \___|   Y  \  Y Y  \  ___/|   |  \  |
+// \____|__  /__|  |__| (____  /\___  >___|  /__|_|  /\___  >___|  /__|
+//         \/                \/     \/     \/      \/     \/     \/
+
+// ErrAttachmentNotExist represents a "AttachmentNotExist" kind of error.
+type ErrAttachmentNotExist struct {
+	ID   int64
+	UUID string
+}
+
+// IsErrAttachmentNotExist checks if an error is a ErrAttachmentNotExist.
+func IsErrAttachmentNotExist(err error) bool {
+	_, ok := err.(ErrAttachmentNotExist)
+	return ok
+}
+
+func (err ErrAttachmentNotExist) Error() string {
+	return fmt.Sprintf("attachment does not exist [id: %d, uuid: %s]", err.ID, err.UUID)
+}
+
+func getAttachmentByID(e db.Engine, id int64) (*Attachment, error) {
+	attach := &Attachment{}
+	if has, err := e.ID(id).Get(attach); err != nil {
+		return nil, err
+	} else if !has {
+		return nil, ErrAttachmentNotExist{ID: id, UUID: ""}
+	}
+	return attach, nil
+}
+
+func getAttachmentByUUID(e db.Engine, uuid string) (*Attachment, error) {
+	attach := &Attachment{}
+	has, err := e.Where("uuid=?", uuid).Get(attach)
+	if err != nil {
+		return nil, err
+	} else if !has {
+		return nil, ErrAttachmentNotExist{0, uuid}
+	}
+	return attach, nil
+}
+
+// GetAttachmentsByUUIDs returns attachment by given UUID list.
+func GetAttachmentsByUUIDs(ctx context.Context, uuids []string) ([]*Attachment, error) {
+	return getAttachmentsByUUIDs(db.GetEngine(ctx), uuids)
+}
+
+func getAttachmentsByUUIDs(e db.Engine, uuids []string) ([]*Attachment, error) {
+	if len(uuids) == 0 {
+		return []*Attachment{}, nil
+	}
+
+	// Silently drop invalid uuids.
+	attachments := make([]*Attachment, 0, len(uuids))
+	return attachments, e.In("uuid", uuids).Find(&attachments)
+}
+
+// GetAttachmentByUUID returns attachment by given UUID.
+func GetAttachmentByUUID(uuid string) (*Attachment, error) {
+	return getAttachmentByUUID(db.GetEngine(db.DefaultContext), uuid)
+}
+
+// ExistAttachmentsByUUID returns true if attachment is exist by given UUID
+func ExistAttachmentsByUUID(uuid string) (bool, error) {
+	return db.GetEngine(db.DefaultContext).Where("`uuid`=?", uuid).Exist(new(Attachment))
+}
+
+// GetAttachmentByReleaseIDFileName returns attachment by given releaseId and fileName.
+func GetAttachmentByReleaseIDFileName(releaseID int64, fileName string) (*Attachment, error) {
+	return getAttachmentByReleaseIDFileName(db.GetEngine(db.DefaultContext), releaseID, fileName)
+}
+
+// GetAttachmentsByIssueIDCtx returns all attachments of an issue.
+func GetAttachmentsByIssueIDCtx(ctx context.Context, issueID int64) ([]*Attachment, error) {
+	attachments := make([]*Attachment, 0, 10)
+	return attachments, db.GetEngine(ctx).Where("issue_id = ? AND comment_id = 0", issueID).Find(&attachments)
+}
+
+// GetAttachmentsByIssueID returns all attachments of an issue.
+func GetAttachmentsByIssueID(issueID int64) ([]*Attachment, error) {
+	return GetAttachmentsByIssueIDCtx(db.DefaultContext, issueID)
+}
+
+// GetAttachmentsByCommentID returns all attachments if comment by given ID.
+func GetAttachmentsByCommentID(commentID int64) ([]*Attachment, error) {
+	return GetAttachmentsByCommentIDCtx(db.DefaultContext, commentID)
+}
+
+// GetAttachmentsByCommentIDCtx returns all attachments if comment by given ID.
+func GetAttachmentsByCommentIDCtx(ctx context.Context, commentID int64) ([]*Attachment, error) {
+	attachments := make([]*Attachment, 0, 10)
+	return attachments, db.GetEngine(ctx).Where("comment_id=?", commentID).Find(&attachments)
+}
+
+// getAttachmentByReleaseIDFileName return a file based on the the following infos:
+func getAttachmentByReleaseIDFileName(e db.Engine, releaseID int64, fileName string) (*Attachment, error) {
+	attach := &Attachment{ReleaseID: releaseID, Name: fileName}
+	has, err := e.Get(attach)
+	if err != nil {
+		return nil, err
+	} else if !has {
+		return nil, err
+	}
+	return attach, nil
+}
+
+// DeleteAttachment deletes the given attachment and optionally the associated file.
+func DeleteAttachment(a *Attachment, remove bool) error {
+	_, err := DeleteAttachments(db.DefaultContext, []*Attachment{a}, remove)
+	return err
+}
+
+// DeleteAttachments deletes the given attachments and optionally the associated files.
+func DeleteAttachments(ctx context.Context, attachments []*Attachment, remove bool) (int, error) {
+	if len(attachments) == 0 {
+		return 0, nil
+	}
+
+	ids := make([]int64, 0, len(attachments))
+	for _, a := range attachments {
+		ids = append(ids, a.ID)
+	}
+
+	cnt, err := db.GetEngine(ctx).In("id", ids).NoAutoCondition().Delete(attachments[0])
+	if err != nil {
+		return 0, err
+	}
+
+	if remove {
+		for i, a := range attachments {
+			if err := storage.Attachments.Delete(a.RelativePath()); err != nil {
+				return i, err
+			}
+		}
+	}
+	return int(cnt), nil
+}
+
+// DeleteAttachmentsByIssue deletes all attachments associated with the given issue.
+func DeleteAttachmentsByIssue(issueID int64, remove bool) (int, error) {
+	attachments, err := GetAttachmentsByIssueID(issueID)
+	if err != nil {
+		return 0, err
+	}
+
+	return DeleteAttachments(db.DefaultContext, attachments, remove)
+}
+
+// DeleteAttachmentsByComment deletes all attachments associated with the given comment.
+func DeleteAttachmentsByComment(commentID int64, remove bool) (int, error) {
+	attachments, err := GetAttachmentsByCommentID(commentID)
+	if err != nil {
+		return 0, err
+	}
+
+	return DeleteAttachments(db.DefaultContext, attachments, remove)
+}
+
+// UpdateAttachment updates the given attachment in database
+func UpdateAttachment(atta *Attachment) error {
+	return UpdateAttachmentCtx(db.DefaultContext, atta)
+}
+
+// UpdateAttachmentByUUID Updates attachment via uuid
+func UpdateAttachmentByUUID(ctx context.Context, attach *Attachment, cols ...string) error {
+	if attach.UUID == "" {
+		return fmt.Errorf("attachment uuid should be not blank")
+	}
+	_, err := db.GetEngine(ctx).Where("uuid=?", attach.UUID).Cols(cols...).Update(attach)
+	return err
+}
+
+// UpdateAttachmentCtx updates the given attachment in database
+func UpdateAttachmentCtx(ctx context.Context, atta *Attachment) error {
+	var sess = db.GetEngine(ctx).Cols("name", "issue_id", "release_id", "comment_id", "download_count")
+	if atta.ID != 0 && atta.UUID == "" {
+		sess = sess.ID(atta.ID)
+	} else {
+		// Use uuid only if id is not set and uuid is set
+		sess = sess.Where("uuid = ?", atta.UUID)
+	}
+	_, err := sess.Update(atta)
+	return err
+}
+
+// DeleteAttachmentsByRelease deletes all attachments associated with the given release.
+func DeleteAttachmentsByRelease(releaseID int64) error {
+	_, err := db.GetEngine(db.DefaultContext).Where("release_id = ?", releaseID).Delete(&Attachment{})
+	return err
+}
+
+// IterateAttachment iterates attachments; it should not be used when Gitea is servicing users.
+func IterateAttachment(f func(attach *Attachment) error) error {
+	var start int
+	const batchSize = 100
+	for {
+		attachments := make([]*Attachment, 0, batchSize)
+		if err := db.GetEngine(db.DefaultContext).Limit(batchSize, start).Find(&attachments); err != nil {
+			return err
+		}
+		if len(attachments) == 0 {
+			return nil
+		}
+		start += len(attachments)
+
+		for _, attach := range attachments {
+			if err := f(attach); err != nil {
+				return err
+			}
+		}
+	}
+}
+
+// CountOrphanedAttachments returns the number of bad attachments
+func CountOrphanedAttachments() (int64, error) {
+	return db.GetEngine(db.DefaultContext).Where("(issue_id > 0 and issue_id not in (select id from issue)) or (release_id > 0 and release_id not in (select id from `release`))").
+		Count(new(Attachment))
+}
+
+// DeleteOrphanedAttachments delete all bad attachments
+func DeleteOrphanedAttachments() error {
+	_, err := db.GetEngine(db.DefaultContext).Where("(issue_id > 0 and issue_id not in (select id from issue)) or (release_id > 0 and release_id not in (select id from `release`))").
+		Delete(new(Attachment))
+	return err
+}