1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59
60. 60
61. 61
62. 62
63. 63
64. 64
65. 65
66. 66
67. 67
68. 68
69. 69
70. 70
71. 71
72. 72
73. 73
74. 74
75. 75
76. 76
77. 77
78. 78
79. 79
80. 80
81. 81
82. 82
83. 83
84. 84
85. 85
86. 86
87. 87
88. 88
89. 89
90. 90
91. 91
92. 92
93. 93
94. 94
95. 95
96. 96
97. 97
98. 98
99. 99
100. 100
101. 101
102. 102
103. 103
104. 104
105. 105
106. 106
107. 107
108. 108
109. 109
110. 110
111. 111
112. 112
113. 113
114. 114
115. 115
116. 116
117. 117
118. 118
119. 119
120. 120
121. 121
122. 122
123. 123
124. 124
125. 125
126. 126
127. 127
128. 128
129. 129
130. 130
131. 131
132. 132
133. 133
134. 134
135. 135
136. 136
137. 137
138. 138
139. 139
140. 140
141. 141
142. 142
143. 143
144. 144
145. 145
146. 146
147. 147
148. 148
149. 149
150. 150
151. 151
152. 152
153. 153
154. 154
155. 155
156. 156
157. 157
158. 158
159. 159
160. 160
161. 161
162. 162
163. 163
164. 164
165. 165
166. 166
167. 167
168. 168
169. 169
170. 170
171. 171
172. 172
173. 173
174. 174
175. 175
176. 176

// Copyright 2016 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package repo

import (
	"fmt"
	"io"
	"mime/multipart"
	"os"
	"path"

	"code.gitea.io/gitea/models/db"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/modules/util"

	gouuid "github.com/google/uuid"
)

// ErrUploadNotExist represents a "UploadNotExist" kind of error.
type ErrUploadNotExist struct {
	ID   int64
	UUID string
}

// IsErrUploadNotExist checks if an error is a ErrUploadNotExist.
func IsErrUploadNotExist(err error) bool {
	_, ok := err.(ErrUploadNotExist)
	return ok
}

func (err ErrUploadNotExist) Error() string {
	return fmt.Sprintf("attachment does not exist [id: %d, uuid: %s]", err.ID, err.UUID)
}

func (err ErrUploadNotExist) Unwrap() error {
	return util.ErrNotExist
}

// Upload represent a uploaded file to a repo to be deleted when moved
type Upload struct {
	ID   int64  `xorm:"pk autoincr"`
	UUID string `xorm:"uuid UNIQUE"`
	Name string
}

func init() {
	db.RegisterModel(new(Upload))
}

// UploadLocalPath returns where uploads is stored in local file system based on given UUID.
func UploadLocalPath(uuid string) string {
	return path.Join(setting.Repository.Upload.TempPath, uuid[0:1], uuid[1:2], uuid)
}

// LocalPath returns where uploads are temporarily stored in local file system.
func (upload *Upload) LocalPath() string {
	return UploadLocalPath(upload.UUID)
}

// NewUpload creates a new upload object.
func NewUpload(name string, buf []byte, file multipart.File) (_ *Upload, err error) {
	upload := &Upload{
		UUID: gouuid.New().String(),
		Name: name,
	}

	localPath := upload.LocalPath()
	if err = os.MkdirAll(path.Dir(localPath), os.ModePerm); err != nil {
		return nil, fmt.Errorf("MkdirAll: %w", err)
	}

	fw, err := os.Create(localPath)
	if err != nil {
		return nil, fmt.Errorf("Create: %w", err)
	}
	defer fw.Close()

	if _, err = fw.Write(buf); err != nil {
		return nil, fmt.Errorf("Write: %w", err)
	} else if _, err = io.Copy(fw, file); err != nil {
		return nil, fmt.Errorf("Copy: %w", err)
	}

	if _, err := db.GetEngine(db.DefaultContext).Insert(upload); err != nil {
		return nil, err
	}

	return upload, nil
}

// GetUploadByUUID returns the Upload by UUID
func GetUploadByUUID(uuid string) (*Upload, error) {
	upload := &Upload{}
	has, err := db.GetEngine(db.DefaultContext).Where("uuid=?", uuid).Get(upload)
	if err != nil {
		return nil, err
	} else if !has {
		return nil, ErrUploadNotExist{0, uuid}
	}
	return upload, nil
}

// GetUploadsByUUIDs returns multiple uploads by UUIDS
func GetUploadsByUUIDs(uuids []string) ([]*Upload, error) {
	if len(uuids) == 0 {
		return []*Upload{}, nil
	}

	// Silently drop invalid uuids.
	uploads := make([]*Upload, 0, len(uuids))
	return uploads, db.GetEngine(db.DefaultContext).In("uuid", uuids).Find(&uploads)
}

// DeleteUploads deletes multiple uploads
func DeleteUploads(uploads ...*Upload) (err error) {
	if len(uploads) == 0 {
		return nil
	}

	ctx, committer, err := db.TxContext(db.DefaultContext)
	if err != nil {
		return err
	}
	defer committer.Close()

	ids := make([]int64, len(uploads))
	for i := 0; i < len(uploads); i++ {
		ids[i] = uploads[i].ID
	}
	if _, err = db.GetEngine(ctx).
		In("id", ids).
		Delete(new(Upload)); err != nil {
		return fmt.Errorf("delete uploads: %w", err)
	}

	if err = committer.Commit(); err != nil {
		return err
	}

	for _, upload := range uploads {
		localPath := upload.LocalPath()
		isFile, err := util.IsFile(localPath)
		if err != nil {
			log.Error("Unable to check if %s is a file. Error: %v", localPath, err)
		}
		if !isFile {
			continue
		}

		if err := util.Remove(localPath); err != nil {
			return fmt.Errorf("remove upload: %w", err)
		}
	}

	return nil
}

// DeleteUploadByUUID deletes a upload by UUID
func DeleteUploadByUUID(uuid string) error {
	upload, err := GetUploadByUUID(uuid)
	if err != nil {
		if IsErrUploadNotExist(err) {
			return nil
		}
		return fmt.Errorf("GetUploadByUUID: %w", err)
	}

	if err := DeleteUploads(upload); err != nil {
		return fmt.Errorf("DeleteUpload: %w", err)
	}

	return nil
}