PLT-2992 Added the ability to use different themes for each team (#3411)

* Cleaned up user_settings_theme.jsx and import_theme_modal.jsx

* Made ImportThemeModal use a callback to return the theme to the user settings modal instead of saving it directly

* Moved user theme from model to preferences

* Added serverside API to delete preferences TODO update package with client stuff

* Changed constants.jsx so that Preferences and ActionTypes can be imported on their own

* Updated ThemeProps migration code to properly rename solarized code themes

* Fixed warnings thrown by AppDispatcher

* Added clientside UI to support team-specific themes

* Removed debugging code from test

* Fixed setting a user's theme when they haven't set their theme before

api/preference.go

@@ -16,6 +16,7 @@ func InitPreference() {
 
 	BaseRoutes.Preferences.Handle("/", ApiUserRequired(getAllPreferences)).Methods("GET")
 	BaseRoutes.Preferences.Handle("/save", ApiUserRequired(savePreferences)).Methods("POST")
+	BaseRoutes.Preferences.Handle("/delete", ApiUserRequired(deletePreferences)).Methods("POST")
 	BaseRoutes.Preferences.Handle("/{category:[A-Za-z0-9_]+}", ApiUserRequired(getPreferenceCategory)).Methods("GET")
 	BaseRoutes.Preferences.Handle("/{category:[A-Za-z0-9_]+}/{name:[A-Za-z0-9_]+}", ApiUserRequired(getPreference)).Methods("GET")
 }
@@ -81,3 +82,30 @@ func getPreference(c *Context, w http.ResponseWriter, r *http.Request) {
 		w.Write([]byte(data.ToJson()))
 	}
 }
+
+func deletePreferences(c *Context, w http.ResponseWriter, r *http.Request) {
+	preferences, err := model.PreferencesFromJson(r.Body)
+	if err != nil {
+		c.Err = model.NewLocAppError("savePreferences", "api.preference.delete_preferences.decode.app_error", nil, err.Error())
+		c.Err.StatusCode = http.StatusBadRequest
+		return
+	}
+
+	for _, preference := range preferences {
+		if c.Session.UserId != preference.UserId {
+			c.Err = model.NewLocAppError("deletePreferences", "api.preference.delete_preferences.user_id.app_error",
+				nil, "session.user_id="+c.Session.UserId+",preference.user_id="+preference.UserId)
+			c.Err.StatusCode = http.StatusForbidden
+			return
+		}
+	}
+
+	for _, preference := range preferences {
+		if result := <-Srv.Store.Preference().Delete(c.Session.UserId, preference.Category, preference.Name); result.Err != nil {
+			c.Err = result.Err
+			return
+		}
+	}
+
+	ReturnStatusOK(w)
+}