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

implement GET /emoji/{emoji_id} for apiv4

6 files changed, 248 insertions, 30 deletions

diff --git a/api/emoji.go b/api/emoji.go
index e1a37e509..feb65877a 100644
--- a/api/emoji.go
+++ b/api/emoji.go
@@ -148,41 +148,24 @@ func deleteEmoji(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	var emoji *model.Emoji
-	if result := <-app.Srv.Store.Emoji().Get(id, false); result.Err != nil {
-		c.Err = result.Err
-		return
-	} else {
-		emoji = result.Data.(*model.Emoji)
-
-		if c.Session.UserId != emoji.CreatorId && !app.SessionHasPermissionTo(c.Session, model.PERMISSION_MANAGE_SYSTEM) {
-			c.Err = model.NewLocAppError("deleteEmoji", "api.emoji.delete.permissions.app_error", nil, "user_id="+c.Session.UserId)
-			c.Err.StatusCode = http.StatusUnauthorized
-			return
-		}
-	}
-
-	if err := (<-app.Srv.Store.Emoji().Delete(id, model.GetMillis())).Err; err != nil {
+	emoji, err := app.GetEmoji(id)
+	if err != nil {
 		c.Err = err
 		return
 	}
 
-	go deleteEmojiImage(id)
-	go deleteReactionsForEmoji(emoji.Name)
-
-	ReturnStatusOK(w)
-}
-
-func deleteEmojiImage(id string) {
-	if err := app.MoveFile(getEmojiImagePath(id), "emoji/"+id+"/image_deleted"); err != nil {
-		l4g.Error("Failed to rename image when deleting emoji %v", id)
+	if c.Session.UserId != emoji.CreatorId && !app.SessionHasPermissionTo(c.Session, model.PERMISSION_MANAGE_SYSTEM) {
+		c.Err = model.NewLocAppError("deleteEmoji", "api.emoji.delete.permissions.app_error", nil, "user_id="+c.Session.UserId)
+		c.Err.StatusCode = http.StatusUnauthorized
+		return
 	}
-}
 
-func deleteReactionsForEmoji(emojiName string) {
-	if result := <-app.Srv.Store.Reaction().DeleteAllWithEmojiName(emojiName); result.Err != nil {
-		l4g.Warn(utils.T("api.emoji.delete.delete_reactions.app_error"), emojiName)
-		l4g.Warn(result.Err)
+	err = app.DeleteEmoji(emoji)
+	if err != nil {
+		c.Err = err
+		return
+	} else {
+		ReturnStatusOK(w)
 	}
 }
 
diff --git a/api4/context.go b/api4/context.go
index 90f39ce5f..0566fbc23 100644
--- a/api4/context.go
+++ b/api4/context.go
@@ -405,6 +405,17 @@ func (c *Context) RequireReportId() *Context {
 	return c
 }
 
+func (c *Context) RequireEmojiId() *Context {
+	if c.Err != nil {
+		return c
+	}
+
+	if len(c.Params.EmojiId) != 26 {
+		c.SetInvalidUrlParam("emoji_id")
+	}
+	return c
+}
+
 func (c *Context) RequireTeamName() *Context {
 	if c.Err != nil {
 		return c
diff --git a/api4/emoji.go b/api4/emoji.go
index 2452f87c4..ff4919860 100644
--- a/api4/emoji.go
+++ b/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()))
+	}
+}
diff --git a/api4/emoji_test.go b/api4/emoji_test.go
index 40199919f..23188a3d2 100644
--- a/api4/emoji_test.go
+++ b/api4/emoji_test.go
@@ -185,6 +185,116 @@ func TestGetEmojiList(t *testing.T) {
 		}
 	}
 
-	// ADD delete test when create the delete endpoint
+	_, resp = Client.DeleteEmoji(emojis[0].Id)
+	CheckNoError(t, resp)
+	listEmoji, resp = Client.GetEmojiList()
+	CheckNoError(t, resp)
+	found := false
+	for _, savedEmoji := range listEmoji {
+		if savedEmoji.Id == emojis[0].Id {
+			found = true
+			break
+		}
+		if found {
+			t.Fatalf("should not get a deleted emoji %v", emojis[0].Id)
+		}
+	}
+
+}
+
+func TestDeleteEmoji(t *testing.T) {
+	th := Setup().InitBasic().InitSystemAdmin()
+	defer TearDown()
+	Client := th.Client
+
+	EnableCustomEmoji := *utils.Cfg.ServiceSettings.EnableCustomEmoji
+	defer func() {
+		*utils.Cfg.ServiceSettings.EnableCustomEmoji = EnableCustomEmoji
+	}()
+	*utils.Cfg.ServiceSettings.EnableCustomEmoji = true
+
+	emoji := &model.Emoji{
+		CreatorId: th.BasicUser.Id,
+		Name:      model.NewId(),
+	}
+
+	newEmoji, resp := Client.CreateEmoji(emoji, utils.CreateTestGif(t, 10, 10), "image.gif")
+	CheckNoError(t, resp)
+
+	ok, resp := Client.DeleteEmoji(newEmoji.Id)
+	CheckNoError(t, resp)
+	if ok != true {
+		t.Fatal("should return true")
+	} else {
+		_, err := Client.GetEmoji(newEmoji.Id)
+		if err == nil {
+			t.Fatal("should not return the emoji it was deleted")
+		}
+	}
+
+	//Admin can delete other users emoji
+	newEmoji, resp = Client.CreateEmoji(emoji, utils.CreateTestGif(t, 10, 10), "image.gif")
+	CheckNoError(t, resp)
+
+	ok, resp = th.SystemAdminClient.DeleteEmoji(newEmoji.Id)
+	CheckNoError(t, resp)
+	if ok != true {
+		t.Fatal("should return true")
+	} else {
+		_, err := th.SystemAdminClient.GetEmoji(newEmoji.Id)
+		if err == nil {
+			t.Fatal("should not return the emoji it was deleted")
+		}
+	}
+
+	// Try to delete just deleted emoji
+	_, resp = Client.DeleteEmoji(newEmoji.Id)
+	CheckInternalErrorStatus(t, resp)
+
+	//Try to delete non-existing emoji
+	_, resp = Client.DeleteEmoji(model.NewId())
+	CheckInternalErrorStatus(t, resp)
+
+	//Try to delete without Id
+	_, resp = Client.DeleteEmoji("")
+	CheckNotFoundStatus(t, resp)
+
+	//Try to delete other user's custom emoji
+	newEmoji, resp = Client.CreateEmoji(emoji, utils.CreateTestGif(t, 10, 10), "image.gif")
+	CheckNoError(t, resp)
+
+	Client.Logout()
+	th.LoginBasic2()
+	ok, resp = Client.DeleteEmoji(newEmoji.Id)
+	CheckUnauthorizedStatus(t, resp)
+}
+
+func TestGetEmoji(t *testing.T) {
+	th := Setup().InitBasic()
+	defer TearDown()
+	Client := th.Client
+
+	EnableCustomEmoji := *utils.Cfg.ServiceSettings.EnableCustomEmoji
+	defer func() {
+		*utils.Cfg.ServiceSettings.EnableCustomEmoji = EnableCustomEmoji
+	}()
+	*utils.Cfg.ServiceSettings.EnableCustomEmoji = true
+
+	emoji := &model.Emoji{
+		CreatorId: th.BasicUser.Id,
+		Name:      model.NewId(),
+	}
+
+	newEmoji, resp := Client.CreateEmoji(emoji, utils.CreateTestGif(t, 10, 10), "image.gif")
+	CheckNoError(t, resp)
+
+	emoji, resp = Client.GetEmoji(newEmoji.Id)
+	CheckNoError(t, resp)
+	if emoji.Id != newEmoji.Id {
+		t.Fatal("wrong emoji was returned")
+	}
+
+	_, resp = Client.GetEmoji(model.NewId())
+	CheckInternalErrorStatus(t, resp)
 
 }
diff --git a/app/emoji.go b/app/emoji.go
index 303d4ac6d..b0c8418aa 100644
--- a/app/emoji.go
+++ b/app/emoji.go
@@ -15,8 +15,11 @@ import (
 	"mime/multipart"
 	"net/http"
 
+	l4g "github.com/alecthomas/log4go"
+
 	"github.com/disintegration/imaging"
 	"github.com/mattermost/platform/model"
+	"github.com/mattermost/platform/utils"
 )
 
 const (
@@ -119,6 +122,32 @@ func UploadEmojiImage(id string, imageData *multipart.FileHeader) *model.AppErro
 	return nil
 }
 
+func DeleteEmoji(emoji *model.Emoji) *model.AppError {
+	if err := (<-Srv.Store.Emoji().Delete(emoji.Id, model.GetMillis())).Err; err != nil {
+		return err
+	}
+
+	go deleteEmojiImage(emoji.Id)
+	go deleteReactionsForEmoji(emoji.Name)
+	return nil
+}
+
+func GetEmoji(emojiId string) (*model.Emoji, *model.AppError) {
+	if !*utils.Cfg.ServiceSettings.EnableCustomEmoji {
+		return nil, model.NewAppError("deleteEmoji", "api.emoji.disabled.app_error", nil, "", http.StatusNotImplemented)
+	}
+
+	if len(utils.Cfg.FileSettings.DriverName) == 0 {
+		return nil, model.NewAppError("deleteImage", "api.emoji.storage.app_error", nil, "", http.StatusNotImplemented)
+	}
+
+	if result := <-Srv.Store.Emoji().Get(emojiId, false); result.Err != nil {
+		return nil, result.Err
+	} else {
+		return result.Data.(*model.Emoji), nil
+	}
+}
+
 func resizeEmojiGif(gifImg *gif.GIF) *gif.GIF {
 	// Create a new RGBA image to hold the incremental frames.
 	firstFrame := gifImg.Image[0].Bounds()
@@ -162,3 +191,16 @@ func imageToPaletted(img image.Image) *image.Paletted {
 	draw.FloydSteinberg.Draw(pm, b, img, image.ZP)
 	return pm
 }
+
+func deleteEmojiImage(id string) {
+	if err := MoveFile(getEmojiImagePath(id), "emoji/"+id+"/image_deleted"); err != nil {
+		l4g.Error("Failed to rename image when deleting emoji %v", id)
+	}
+}
+
+func deleteReactionsForEmoji(emojiName string) {
+	if result := <-Srv.Store.Reaction().DeleteAllWithEmojiName(emojiName); result.Err != nil {
+		l4g.Warn(utils.T("api.emoji.delete.delete_reactions.app_error"), emojiName)
+		l4g.Warn(result.Err)
+	}
+}
diff --git a/model/client4.go b/model/client4.go
index 6281b3df4..9fda40aca 100644
--- a/model/client4.go
+++ b/model/client4.go
@@ -234,6 +234,10 @@ func (c *Client4) GetEmojisRoute() string {
 	return fmt.Sprintf("/emoji")
 }
 
+func (c *Client4) GetEmojiRoute(emojiId string) string {
+	return fmt.Sprintf(c.GetEmojisRoute()+"/%v", emojiId)
+}
+
 func (c *Client4) DoApiGet(url string, etag string) (*http.Response, *AppError) {
 	return c.DoApiRequest(http.MethodGet, url, "", etag)
 }
@@ -2335,6 +2339,26 @@ func (c *Client4) GetEmojiList() ([]*Emoji, *Response) {
 	}
 }
 
+// DeleteEmoji delete an custom emoji on the provided emoji id string.
+func (c *Client4) DeleteEmoji(emojiId string) (bool, *Response) {
+	if r, err := c.DoApiDelete(c.GetEmojiRoute(emojiId)); err != nil {
+		return false, &Response{StatusCode: r.StatusCode, Error: err}
+	} else {
+		defer closeBody(r)
+		return CheckStatusOK(r), BuildResponse(r)
+	}
+}
+
+// GetEmoji returns a custom emoji in the system on the provided emoji id string.
+func (c *Client4) GetEmoji(emojiId string) (*Emoji, *Response) {
+	if r, err := c.DoApiGet(c.GetEmojiRoute(emojiId), ""); err != nil {
+		return nil, &Response{StatusCode: r.StatusCode, Error: err}
+	} else {
+		defer closeBody(r)
+		return EmojiFromJson(r.Body), BuildResponse(r)
+	}
+}
+
 // Reaction Section
 
 // GetReactions returns a list of reactions to a post.