[MM-10354] Add feature to remove team icon (#8684)

* set team.LastTeamIconUpdate to 0 when removing team icon

* add APIv4 for removing team icon

* removed comment and updated typo on AppError

model/client4.go

@@ -1459,6 +1459,69 @@ func (c *Client4) GetTeamInviteInfo(inviteId string) (*Team, *Response) {
 	}
 }
 
+// SetTeamIcon sets team icon of the team
+func (c *Client4) SetTeamIcon(teamId string, data []byte) (bool, *Response) {
+
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+
+	if part, err := writer.CreateFormFile("image", "teamIcon.png"); err != nil {
+		return false, &Response{Error: NewAppError("SetTeamIcon", "model.client.set_team_icon.no_file.app_error", nil, err.Error(), http.StatusBadRequest)}
+	} else if _, err = io.Copy(part, bytes.NewBuffer(data)); err != nil {
+		return false, &Response{Error: NewAppError("SetTeamIcon", "model.client.set_team_icon.no_file.app_error", nil, err.Error(), http.StatusBadRequest)}
+	}
+
+	if err := writer.Close(); err != nil {
+		return false, &Response{Error: NewAppError("SetTeamIcon", "model.client.set_team_icon.writer.app_error", nil, err.Error(), http.StatusBadRequest)}
+	}
+
+	rq, _ := http.NewRequest("POST", c.ApiUrl+c.GetTeamRoute(teamId)+"/image", bytes.NewReader(body.Bytes()))
+	rq.Header.Set("Content-Type", writer.FormDataContentType())
+	rq.Close = true
+
+	if len(c.AuthToken) > 0 {
+		rq.Header.Set(HEADER_AUTH, c.AuthType+" "+c.AuthToken)
+	}
+
+	if rp, err := c.HttpClient.Do(rq); err != nil || rp == nil {
+		// set to http.StatusForbidden(403)
+		return false, &Response{StatusCode: http.StatusForbidden, Error: NewAppError(c.GetTeamRoute(teamId)+"/image", "model.client.connecting.app_error", nil, err.Error(), 403)}
+	} else {
+		defer closeBody(rp)
+
+		if rp.StatusCode >= 300 {
+			return false, BuildErrorResponse(rp, AppErrorFromJson(rp.Body))
+		} else {
+			return CheckStatusOK(rp), BuildResponse(rp)
+		}
+	}
+}
+
+// GetTeamIcon gets the team icon of the team
+func (c *Client4) GetTeamIcon(teamId, etag string) ([]byte, *Response) {
+	if r, err := c.DoApiGet(c.GetTeamRoute(teamId)+"/image", etag); err != nil {
+		return nil, BuildErrorResponse(r, err)
+	} else {
+		defer closeBody(r)
+
+		if data, err := ioutil.ReadAll(r.Body); err != nil {
+			return nil, BuildErrorResponse(r, NewAppError("GetTeamIcon", "model.client.get_team_icon.app_error", nil, err.Error(), r.StatusCode))
+		} else {
+			return data, BuildResponse(r)
+		}
+	}
+}
+
+// RemoveTeamIcon updates LastTeamIconUpdate to 0 which indicates team icon is removed.
+func (c *Client4) RemoveTeamIcon(teamId string) (bool, *Response) {
+	if r, err := c.DoApiDelete(c.GetTeamRoute(teamId) + "/image"); err != nil {
+		return false, BuildErrorResponse(r, err)
+	} else {
+		defer closeBody(r)
+		return CheckStatusOK(r), BuildResponse(r)
+	}
+}
+
 // Channel Section
 
 // CreateChannel creates a channel based on the provided channel struct.
@@ -3442,56 +3505,3 @@ func (c *Client4) DeactivatePlugin(id string) (bool, *Response) {
 		return CheckStatusOK(r), BuildResponse(r)
 	}
 }
-
-// SetTeamIcon sets team icon of the team
-func (c *Client4) SetTeamIcon(teamId string, data []byte) (bool, *Response) {
-
-	body := &bytes.Buffer{}
-	writer := multipart.NewWriter(body)
-
-	if part, err := writer.CreateFormFile("image", "teamIcon.png"); err != nil {
-		return false, &Response{Error: NewAppError("SetTeamIcon", "model.client.set_team_icon.no_file.app_error", nil, err.Error(), http.StatusBadRequest)}
-	} else if _, err = io.Copy(part, bytes.NewBuffer(data)); err != nil {
-		return false, &Response{Error: NewAppError("SetTeamIcon", "model.client.set_team_icon.no_file.app_error", nil, err.Error(), http.StatusBadRequest)}
-	}
-
-	if err := writer.Close(); err != nil {
-		return false, &Response{Error: NewAppError("SetTeamIcon", "model.client.set_team_icon.writer.app_error", nil, err.Error(), http.StatusBadRequest)}
-	}
-
-	rq, _ := http.NewRequest("POST", c.ApiUrl+c.GetTeamRoute(teamId)+"/image", bytes.NewReader(body.Bytes()))
-	rq.Header.Set("Content-Type", writer.FormDataContentType())
-	rq.Close = true
-
-	if len(c.AuthToken) > 0 {
-		rq.Header.Set(HEADER_AUTH, c.AuthType+" "+c.AuthToken)
-	}
-
-	if rp, err := c.HttpClient.Do(rq); err != nil || rp == nil {
-		// set to http.StatusForbidden(403)
-		return false, &Response{StatusCode: http.StatusForbidden, Error: NewAppError(c.GetTeamRoute(teamId)+"/image", "model.client.connecting.app_error", nil, err.Error(), 403)}
-	} else {
-		defer closeBody(rp)
-
-		if rp.StatusCode >= 300 {
-			return false, BuildErrorResponse(rp, AppErrorFromJson(rp.Body))
-		} else {
-			return CheckStatusOK(rp), BuildResponse(rp)
-		}
-	}
-}
-
-// GetTeamIcon gets the team icon of the team
-func (c *Client4) GetTeamIcon(teamId, etag string) ([]byte, *Response) {
-	if r, err := c.DoApiGet(c.GetTeamRoute(teamId)+"/image", etag); err != nil {
-		return nil, BuildErrorResponse(r, err)
-	} else {
-		defer closeBody(r)
-
-		if data, err := ioutil.ReadAll(r.Body); err != nil {
-			return nil, BuildErrorResponse(r, NewAppError("GetTeamIcon", "model.client.get_team_icon.app_error", nil, err.Error(), r.StatusCode))
-		} else {
-			return data, BuildResponse(r)
-		}
-	}
-}