implement DELETE /emoji/{emoji_id} fro apiV4 (#6021)

implement GET /emoji/{emoji_id} for apiv4

api4/emoji.go

@@ -20,6 +20,8 @@ func InitEmoji() {
 
 	BaseRoutes.Emojis.Handle("", ApiSessionRequired(createEmoji)).Methods("POST")
 	BaseRoutes.Emojis.Handle("", ApiSessionRequired(getEmojiList)).Methods("GET")
+	BaseRoutes.Emoji.Handle("", ApiSessionRequired(deleteEmoji)).Methods("DELETE")
+	BaseRoutes.Emoji.Handle("", ApiSessionRequired(getEmoji)).Methods("GET")
 }
 
 func createEmoji(c *Context, w http.ResponseWriter, r *http.Request) {
@@ -81,3 +83,49 @@ func getEmojiList(c *Context, w http.ResponseWriter, r *http.Request) {
 		w.Write([]byte(model.EmojiListToJson(listEmoji)))
 	}
 }
+
+func deleteEmoji(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireEmojiId()
+	if c.Err != nil {
+		return
+	}
+
+	emoji, err := app.GetEmoji(c.Params.EmojiId)
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	if c.Session.UserId != emoji.CreatorId && !app.SessionHasPermissionTo(c.Session, model.PERMISSION_MANAGE_SYSTEM) {
+		c.Err = model.NewAppError("deleteImage", "api.emoji.delete.permissions.app_error", nil, "user_id="+c.Session.UserId, http.StatusUnauthorized)
+		return
+	}
+
+	err = app.DeleteEmoji(emoji)
+	if err != nil {
+		c.Err = err
+		return
+	} else {
+		ReturnStatusOK(w)
+	}
+}
+
+func getEmoji(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireEmojiId()
+	if c.Err != nil {
+		return
+	}
+
+	if !*utils.Cfg.ServiceSettings.EnableCustomEmoji {
+		c.Err = model.NewAppError("getEmoji", "api.emoji.disabled.app_error", nil, "", http.StatusNotImplemented)
+		return
+	}
+
+	emoji, err := app.GetEmoji(c.Params.EmojiId)
+	if err != nil {
+		c.Err = err
+		return
+	} else {
+		w.Write([]byte(emoji.ToJson()))
+	}
+}