reverse caching: redux boilerplate

js/src/redux/providers/registry/actions.js

@@ -0,0 +1,28 @@
+// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export const setReverse = (address, reverse) => ({
+  type: 'setReverse',
+  address, reverse
+});
+
+export const startCachingReverses = () => ({
+  type: 'startCachingReverses'
+});
+
+export const stopCachingReverses = () => ({
+  type: 'stopCachingReverses'
+});

js/src/redux/providers/registry/reducer.js

@@ -0,0 +1,29 @@
+// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+const initialState = {
+  reverse: {} // cache for reverse lookup
+};
+
+export default (state = initialState, action) => {
+  if (action.type === 'setReverse') {
+    return { ...state, reverse: {
+      ...state.reverse, [ action.address ]: action.reverse
+    } };
+  }
+
+  return state;
+};

js/src/redux/reducers.js

@@ -24,6 +24,7 @@ import {
   snackbarReducer, walletReducer
 } from './providers';
 import certificationsReducer from './providers/certifications/reducer';
+import registryReducer from './providers/registry/reducer';
 
 import errorReducer from '~/ui/Errors/reducers';
 import settingsReducer from '~/views/Settings/reducers';
@@ -46,6 +47,7 @@ export default function () {
     personal: personalReducer,
     signer: signerReducer,
     snackbar: snackbarReducer,
-    wallet: walletReducer
+    wallet: walletReducer,
+    registry: registryReducer
   });
 }