Update safety number change warning dialog

ts/state/selectors/safetyNumber.ts

@@ -0,0 +1,24 @@
+import { createSelector } from 'reselect';
+
+import { StateType } from '../reducer';
+import {
+  SafetyNumberContactType,
+  SafetyNumberStateType,
+} from '../ducks/safetyNumber';
+
+const getSafetyNumber = (state: StateType): SafetyNumberStateType =>
+  state.safetyNumber;
+
+type Props = {
+  contactID: string;
+};
+
+const getContactID = (_: StateType, props: Props): string => props.contactID;
+
+export const getContactSafetyNumber = createSelector(
+  [getSafetyNumber, getContactID],
+  (
+    { contacts }: SafetyNumberStateType,
+    contactID: string
+  ): SafetyNumberContactType => contacts[contactID]
+);