1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package api
import (
"image"
"image/draw"
"image/gif"
"net/http"
"strings"
"image/color/palette"
"github.com/disintegration/imaging"
"github.com/gorilla/mux"
"github.com/mattermost/mattermost-server/app"
"github.com/mattermost/mattermost-server/model"
)
func (api *API) InitEmoji() {
api.BaseRoutes.Emoji.Handle("/list", api.ApiUserRequired(getEmoji)).Methods("GET")
api.BaseRoutes.Emoji.Handle("/create", api.ApiUserRequired(createEmoji)).Methods("POST")
api.BaseRoutes.Emoji.Handle("/delete", api.ApiUserRequired(deleteEmoji)).Methods("POST")
api.BaseRoutes.Emoji.Handle("/{id:[A-Za-z0-9_]+}", api.ApiUserRequiredTrustRequester(getEmojiImage)).Methods("GET")
}
func getEmoji(c *Context, w http.ResponseWriter, r *http.Request) {
if !*c.App.Config().ServiceSettings.EnableCustomEmoji {
c.Err = model.NewAppError("getEmoji", "api.emoji.disabled.app_error", nil, "", http.StatusNotImplemented)
return
}
listEmoji, err := c.App.GetEmojiList(0, 100000, "")
if err != nil {
c.Err = err
return
} else {
w.Write([]byte(model.EmojiListToJson(listEmoji)))
}
}
func createEmoji(c *Context, w http.ResponseWriter, r *http.Request) {
if !*c.App.Config().ServiceSettings.EnableCustomEmoji {
c.Err = model.NewAppError("createEmoji", "api.emoji.disabled.app_error", nil, "", http.StatusNotImplemented)
return
}
if emojiInterface := c.App.Emoji; emojiInterface != nil &&
!emojiInterface.CanUserCreateEmoji(c.Session.Roles, c.Session.TeamMembers) {
c.Err = model.NewAppError("createEmoji", "api.emoji.create.permissions.app_error", nil, "user_id="+c.Session.UserId, http.StatusUnauthorized)
return
}
if len(*c.App.Config().FileSettings.DriverName) == 0 {
c.Err = model.NewAppError("createEmoji", "api.emoji.storage.app_error", nil, "", http.StatusNotImplemented)
return
}
if r.ContentLength > app.MaxEmojiFileSize {
c.Err = model.NewAppError("createEmoji", "api.emoji.create.too_large.app_error", nil, "", http.StatusRequestEntityTooLarge)
return
}
if err := r.ParseMultipartForm(app.MaxEmojiFileSize); err != nil {
c.Err = model.NewAppError("createEmoji", "api.emoji.create.parse.app_error", nil, err.Error(), http.StatusBadRequest)
return
}
m := r.MultipartForm
props := m.Value
emoji := model.EmojiFromJson(strings.NewReader(props["emoji"][0]))
if emoji == nil {
c.SetInvalidParam("createEmoji", "emoji")
return
}
// wipe the emoji id so that existing emojis can't get overwritten
emoji.Id = ""
// do our best to validate the emoji before committing anything to the DB so that we don't have to clean up
// orphaned files left over when validation fails later on
emoji.PreSave()
if err := emoji.IsValid(); err != nil {
c.Err = err
c.Err.StatusCode = http.StatusBadRequest
return
}
if emoji.CreatorId != c.Session.UserId {
c.Err = model.NewAppError("createEmoji", "api.emoji.create.other_user.app_error", nil, "", http.StatusUnauthorized)
return
}
if result := <-c.App.Srv.Store.Emoji().GetByName(emoji.Name); result.Err == nil && result.Data != nil {
c.Err = model.NewAppError("createEmoji", "api.emoji.create.duplicate.app_error", nil, "", http.StatusBadRequest)
return
}
if imageData := m.File["image"]; len(imageData) == 0 {
c.SetInvalidParam("createEmoji", "image")
return
} else if err := c.App.UploadEmojiImage(emoji.Id, imageData[0]); err != nil {
c.Err = err
return
}
if result := <-c.App.Srv.Store.Emoji().Save(emoji); result.Err != nil {
c.Err = result.Err
return
} else {
message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_EMOJI_ADDED, "", "", "", nil)
message.Add("emoji", result.Data.(*model.Emoji).ToJson())
c.App.Publish(message)
w.Write([]byte(result.Data.(*model.Emoji).ToJson()))
}
}
func deleteEmoji(c *Context, w http.ResponseWriter, r *http.Request) {
if !*c.App.Config().ServiceSettings.EnableCustomEmoji {
c.Err = model.NewAppError("deleteEmoji", "api.emoji.disabled.app_error", nil, "", http.StatusNotImplemented)
return
}
if len(*c.App.Config().FileSettings.DriverName) == 0 {
c.Err = model.NewAppError("deleteImage", "api.emoji.storage.app_error", nil, "", http.StatusNotImplemented)
return
}
props := model.MapFromJson(r.Body)
id := props["id"]
if len(id) == 0 {
c.SetInvalidParam("deleteEmoji", "id")
return
}
emoji, err := c.App.GetEmoji(id)
if err != nil {
c.Err = err
return
}
if c.Session.UserId != emoji.CreatorId && !c.App.SessionHasPermissionTo(c.Session, model.PERMISSION_MANAGE_SYSTEM) {
c.Err = model.NewAppError("deleteEmoji", "api.emoji.delete.permissions.app_error", nil, "user_id="+c.Session.UserId, http.StatusUnauthorized)
return
}
err = c.App.DeleteEmoji(emoji)
if err != nil {
c.Err = err
return
} else {
ReturnStatusOK(w)
}
}
func getEmojiImage(c *Context, w http.ResponseWriter, r *http.Request) {
if !*c.App.Config().ServiceSettings.EnableCustomEmoji {
c.Err = model.NewAppError("getEmojiImage", "api.emoji.disabled.app_error", nil, "", http.StatusNotImplemented)
return
}
if len(*c.App.Config().FileSettings.DriverName) == 0 {
c.Err = model.NewAppError("getEmojiImage", "api.emoji.storage.app_error", nil, "", http.StatusNotImplemented)
return
}
params := mux.Vars(r)
id := params["id"]
if len(id) == 0 {
c.SetInvalidParam("getEmojiImage", "id")
return
}
image, imageType, err := c.App.GetEmojiImage(id)
if err != nil {
c.Err = err
return
}
w.Header().Set("Content-Type", "image/"+imageType)
w.Header().Set("Cache-Control", "max-age=2592000, public")
w.Write(image)
}
func resizeEmoji(img image.Image, width int, height int) image.Image {
emojiWidth := float64(width)
emojiHeight := float64(height)
var emoji image.Image
if emojiHeight <= app.MaxEmojiHeight && emojiWidth <= app.MaxEmojiWidth {
emoji = img
} else {
emoji = imaging.Fit(img, app.MaxEmojiWidth, app.MaxEmojiHeight, imaging.Lanczos)
}
return emoji
}
func resizeEmojiGif(gifImg *gif.GIF) *gif.GIF {
// Create a new RGBA image to hold the incremental frames.
firstFrame := gifImg.Image[0].Bounds()
b := image.Rect(0, 0, firstFrame.Dx(), firstFrame.Dy())
img := image.NewRGBA(b)
resizedImage := image.Image(nil)
// Resize each frame.
for index, frame := range gifImg.Image {
bounds := frame.Bounds()
draw.Draw(img, bounds, frame, bounds.Min, draw.Over)
resizedImage = resizeEmoji(img, firstFrame.Dx(), firstFrame.Dy())
gifImg.Image[index] = imageToPaletted(resizedImage)
}
// Set new gif width and height
gifImg.Config.Width = resizedImage.Bounds().Dx()
gifImg.Config.Height = resizedImage.Bounds().Dy()
return gifImg
}
func imageToPaletted(img image.Image) *image.Paletted {
b := img.Bounds()
pm := image.NewPaletted(b, palette.Plan9)
draw.FloydSteinberg.Draw(pm, b, img, image.ZP)
return pm
}
|
