Use upstream's settings for CW auto-expand and column swiping (#1770)

* Use Mastodon server-side settings for automatically expanding toots with CWs

* Add modal warning about settings changes

* Use Mastodon server-side settings for disabling swiping

app/javascript/flavours/glitch/actions/importer/normalizer.js

@@ -1,7 +1,6 @@
 import escapeTextContentForBrowser from 'escape-html';
 import emojify from 'flavours/glitch/util/emoji';
 import { unescapeHTML } from 'flavours/glitch/util/html';
-import { expandSpoilers } from 'flavours/glitch/util/initial_state';
 
 const domParser = new DOMParser();
 

app/javascript/flavours/glitch/actions/local_settings.js

@@ -1,4 +1,46 @@
+import { expandSpoilers, disableSwiping } from 'flavours/glitch/util/initial_state';
+import { openModal } from './modal';
+
 export const LOCAL_SETTING_CHANGE = 'LOCAL_SETTING_CHANGE';
+export const LOCAL_SETTING_DELETE = 'LOCAL_SETTING_DELETE';
+
+export function checkDeprecatedLocalSettings() {
+  return (dispatch, getState) => {
+    const local_auto_unfold = getState().getIn(['local_settings', 'content_warnings', 'auto_unfold']);
+    const local_swipe_to_change_columns = getState().getIn(['local_settings', 'swipe_to_change_columns']);
+    let changed_settings = [];
+
+    if (local_auto_unfold !== null && local_auto_unfold !== undefined) {
+      if (local_auto_unfold === expandSpoilers) {
+        dispatch(deleteLocalSetting(['content_warnings', 'auto_unfold']));
+      } else {
+        changed_settings.push('user_setting_expand_spoilers');
+      }
+    }
+
+    if (local_swipe_to_change_columns !== null && local_swipe_to_change_columns !== undefined) {
+      if (local_swipe_to_change_columns === !disableSwiping) {
+        dispatch(deleteLocalSetting(['swipe_to_change_columns']));
+      } else {
+        changed_settings.push('user_setting_disable_swiping');
+      }
+    }
+
+    if (changed_settings.length > 0) {
+      dispatch(openModal('DEPRECATED_SETTINGS', {
+        settings: changed_settings,
+        onConfirm: () => dispatch(clearDeprecatedLocalSettings()),
+      }));
+    }
+  };
+};
+
+export function clearDeprecatedLocalSettings() {
+  return (dispatch) => {
+    dispatch(deleteLocalSetting(['content_warnings', 'auto_unfold']));
+    dispatch(deleteLocalSetting(['swipe_to_change_columns']));
+  };
+};
 
 export function changeLocalSetting(key, value) {
   return dispatch => {
@@ -12,6 +54,17 @@ export function changeLocalSetting(key, value) {
   };
 };
 
+export function deleteLocalSetting(key) {
+  return dispatch => {
+    dispatch({
+      type: LOCAL_SETTING_DELETE,
+      key,
+    });
+
+    dispatch(saveLocalSettings());
+  };
+};
+
 //  __TODO :__
 //  Right now `saveLocalSettings()` doesn't keep track of which user
 //  is currently signed in, but it might be better to give each user