[Glitch] Add dropdown for boost privacy in boost confirmation modal

Port 07b46cb332 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

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

@@ -0,0 +1,29 @@
+import { openModal } from './modal';
+
+export const BOOSTS_INIT_MODAL = 'BOOSTS_INIT_MODAL';
+export const BOOSTS_CHANGE_PRIVACY = 'BOOSTS_CHANGE_PRIVACY';
+
+export function initBoostModal(props) {
+  return (dispatch, getState) => {
+    const default_privacy = getState().getIn(['compose', 'default_privacy']);
+
+    const privacy = props.status.get('visibility') === 'private' ? 'private' : default_privacy;
+
+    dispatch({
+      type: BOOSTS_INIT_MODAL,
+      privacy
+    });
+
+    dispatch(openModal('BOOST', props));
+  };
+}
+
+
+export function changeBoostPrivacy(privacy) {
+  return dispatch => {
+    dispatch({
+      type: BOOSTS_CHANGE_PRIVACY,
+      privacy,
+    });
+  };
+}