1 files changed, 175 insertions, 0 deletions
diff --git a/models/attachment.go b/models/attachment.go
new file mode 100644
index 00000000..a270b751
--- /dev/null
+++ b/models/attachment.go
@@ -0,0 +1,175 @@
+// Copyright 2017 The Gogs 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 models
+
+import (
+	"fmt"
+	"io"
+	"mime/multipart"
+	"os"
+	"path"
+	"time"
+
+	"github.com/go-xorm/xorm"
+	gouuid "github.com/satori/go.uuid"
+
+	"github.com/gogits/gogs/modules/setting"
+)
+
+// Attachment represent a attachment of issue/comment/release.
+type Attachment struct {
+	ID        int64  `xorm:"pk autoincr"`
+	UUID      string `xorm:"uuid UNIQUE"`
+	IssueID   int64  `xorm:"INDEX"`
+	CommentID int64
+	ReleaseID int64 `xorm:"INDEX"`
+	Name      string
+
+	Created     time.Time `xorm:"-"`
+	CreatedUnix int64
+}
+
+func (a *Attachment) BeforeInsert() {
+	a.CreatedUnix = time.Now().Unix()
+}
+
+func (a *Attachment) AfterSet(colName string, _ xorm.Cell) {
+	switch colName {
+	case "created_unix":
+		a.Created = time.Unix(a.CreatedUnix, 0).Local()
+	}
+}
+
+// AttachmentLocalPath returns where attachment is stored in local file system based on given UUID.
+func AttachmentLocalPath(uuid string) string {
+	return path.Join(setting.AttachmentPath, uuid[0:1], uuid[1:2], uuid)
+}
+
+// LocalPath returns where attachment is stored in local file system.
+func (attach *Attachment) LocalPath() string {
+	return AttachmentLocalPath(attach.UUID)
+}
+
+// NewAttachment creates a new attachment object.
+func NewAttachment(name string, buf []byte, file multipart.File) (_ *Attachment, err error) {
+	attach := &Attachment{
+		UUID: gouuid.NewV4().String(),
+		Name: name,
+	}
+
+	localPath := attach.LocalPath()
+	if err = os.MkdirAll(path.Dir(localPath), os.ModePerm); err != nil {
+		return nil, fmt.Errorf("MkdirAll: %v", err)
+	}
+
+	fw, err := os.Create(localPath)
+	if err != nil {
+		return nil, fmt.Errorf("Create: %v", err)
+	}
+	defer fw.Close()
+
+	if _, err = fw.Write(buf); err != nil {
+		return nil, fmt.Errorf("Write: %v", err)
+	} else if _, err = io.Copy(fw, file); err != nil {
+		return nil, fmt.Errorf("Copy: %v", err)
+	}
+
+	if _, err := x.Insert(attach); err != nil {
+		return nil, err
+	}
+
+	return attach, nil
+}
+
+func getAttachmentByUUID(e Engine, uuid string) (*Attachment, error) {
+	attach := &Attachment{UUID: uuid}
+	has, err := x.Get(attach)
+	if err != nil {
+		return nil, err
+	} else if !has {
+		return nil, ErrAttachmentNotExist{0, uuid}
+	}
+	return attach, nil
+}
+
+func getAttachmentsByUUIDs(e 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(x, uuid)
+}
+
+func getAttachmentsByIssueID(e Engine, issueID int64) ([]*Attachment, error) {
+	attachments := make([]*Attachment, 0, 10)
+	return attachments, e.Where("issue_id = ? AND comment_id = 0", issueID).Find(&attachments)
+}
+
+// GetAttachmentsByIssueID returns all attachments of an issue.
+func GetAttachmentsByIssueID(issueID int64) ([]*Attachment, error) {
+	return getAttachmentsByIssueID(x, issueID)
+}
+
+func getAttachmentsByCommentID(e Engine, commentID int64) ([]*Attachment, error) {
+	attachments := make([]*Attachment, 0, 10)
+	return attachments, e.Where("comment_id=?", commentID).Find(&attachments)
+}
+
+// GetAttachmentsByCommentID returns all attachments if comment by given ID.
+func GetAttachmentsByCommentID(commentID int64) ([]*Attachment, error) {
+	return getAttachmentsByCommentID(x, commentID)
+}
+
+// DeleteAttachment deletes the given attachment and optionally the associated file.
+func DeleteAttachment(a *Attachment, remove bool) error {
+	_, err := DeleteAttachments([]*Attachment{a}, remove)
+	return err
+}
+
+// DeleteAttachments deletes the given attachments and optionally the associated files.
+func DeleteAttachments(attachments []*Attachment, remove bool) (int, error) {
+	for i, a := range attachments {
+		if remove {
+			if err := os.Remove(a.LocalPath()); err != nil {
+				return i, err
+			}
+		}
+
+		if _, err := x.Delete(a); err != nil {
+			return i, err
+		}
+	}
+
+	return len(attachments), 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(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(attachments, remove)
+}